Your biggest torque and fuel economy gain was the 4 valve head. We used to do big port sleeves, N-65s and A timing with the 2 valve heads, and that elminated most of the smoke, but the 4 valve head gave 2-3 MPG better fuel economy PLUS more torque. The fuel saving figure caused the owner to finally wake up to the fact that, with increased efficiency, better power AND no more smoke tickets, a full N series conversion with a new head would pay for itself within a year's normal operation. One thing they learned over time was that smokeless exhaust from the conversions increased engine life between rebuilds by roughly 100K miles. The 4104s were the busiest buses in the fleet and ran the most mileage, so the whole fleet got the treatment as they came up for rebuild. Only one of the 4103s got it. Being light compared to the 04, it became known as "The Rocket." Neither of the 3751s got it and were retired as the 4106s came in.
Glad your bus is delivering performance and living up to your expectations. A testament to your knowledge and expertise with the 2 strokes. Nice to hear you were trouble-free on the 300-mile shakedown trip, I wish you many more hassle-free miles in your future. Work safe, stay cool Doug@ the "ranch"
Sounds as though everything is getting off to a good start! Those Old School GM engineers undoubtedly looked down upon you from the Heavens today and smiled.
michigandon..... I know what you mean.... and I have a personal "tie" with one of those "Old School Engineers" myself. I personally, studied Diesel Engine Design & Theory (as a prep for R&D work), specializing in 2 cycle diesels for 4 years back in the mid 1960s (1963 - 1967), and was fortunate to have come personal tutelage of Mr. P. Nicholas, who had just retired from GM Diesel Power (Detroit Diesel after 4/1965) at R&D. He was one of the original lead designers of the Very First 2 cycle prototype diesel engine - which was a 4-71, and I have a framed 8x10" B&W photo which he gave me after I came back from VN the last time in the fall of 1970.... of himself, "Boss" Kettering and a third engineer whom I've forgotten his name at the moment, that was taken just moments after the prototype was fired up for the very first time.... it's hanging on my wall, just above my desk here, as I'm typing this. I have been offered many hundreds for it, but it's not for sale and the Sentimental value of it for me, personally... is priceless!!
Today, one of our cats dragged a mouse into the house. As me and the wife were ripping apart the livingroom to catch the little bastard, I came across my Spaceballs DVD. Strange.
I recall when I drove a Silver 92 435 hp back in 77/78 you had to kind of hold back on the downhill if you where about to go right back into climbing up the other side of say a river valley with a bridge at the bottom. If you held it back and had a little bit of throttle to go, you could start building boost pressure before you where into the climb. Otherwise you had a serious lag before the boost pressure came up. Keep in mind the blower is gear driven, and that in turn will control the exhaust flow coming out of the cylinders that spool up the exhaust turbine and hence the compressor wheel on the turbo. Try to keep the load constant for best results. I wonder if anyone ever tried putting a VGT on a 2 stroke Detroit ? I have a good 2v 6 cyl head ( core ) I’ll give away but I live near Toronto.
I know that others have said this before, but, when you do put the turbo in, get a pyrometer and watch the EGT's going up hills. Congrats on the performance improvements!
A common add on with those fuel processors is a one way check valve on the fuel tank inlet line, fuel can enter the filter from the tank but it can't drain back. A big help when you do a filter change as well. The worse that can happen if you have a leaking filter housing is the filter empties you don't loose supply line prime. You must be using a lot more of the engines power now, horsepower needed to push a vehicle is not proportional to speed, double speed needs 4 times the power, that extra 4 mph is around a 5% increase in speed , you are using another 15% or so of engine power, those bigger tyres are helping a lot. Sounds like you need a faster rear axle if you are still managing to sit on the governor at 70mph
Replace the Clear dome on that fuel filter assembly. It's getting discolored and they're really not expensive - it'll give you new O rings and be crystal clear so you can see what's going on that much easier.
I love those old buses and remember (I'm 71) as a kid you had to really hustle to keep up with the early mid 60's Greyhound/Detroit buses. They would get it. When Daddy ditched his 6 cyl. Chevy and got his first 283 that fixed that. But he was still amazed on the route up a major highway near by into a number of small communities pre interstate how those drivers would haul butt. At the last redlight before a long stretch of open road when the green came you would see the driver hammer down as evidenced by the exhaust note and smoke. Before you knew it he was doing 65-70 ~ or more (?!) and haulin! I loved it as a kid and your videos bring fond memories with dad, mom and I enjoying an afternoon of chasing a Greyhound up Hwy 43 with us all amazed how fast he could (and would) go!
Absolutely loving your work. Doing all the right things. You won't know it when you turbo it! You'll be grinning like a Cheshire cat 😻 I can't wait for the turbo upgrade myself! 👍👍
I recently moved back home to help my elderly father with things around his place, and came face to face with something I'd forgotten from my childhood: A mural off of old Dixie Highway with a Silversides featured prominently. I seem to recall you mentioning something about Lenny being on a route that included Chicago, and it dawned on me at the time that this mural might in fact be of him or one of his siblings, as the ol' Dixie is U.S. Route 1, and was likely part of that route. Though I can't confirm that, as I wouldn't know where to start when it comes to looking up old routes.
Don't feel bad...most of the drivers in the old days drove them as hard as they would go. There was always stuff torn up on them. Damaged front ends where they rear-ended people, blown tires from sideswiping curbs, you name it.
I have to give you credit for being willing to hit the road and go anywhere in your old bus. Hell, I got a modern motorcoach and I get nervous taking it out. I guess knowing that I’m hauling passengers causes me concern about breakdowns. I love being on the road in a motorcoach. I had a completely different career for 30 years and started driving a motorcoach part time just to have something to do. I never thought I’d love it so much. There’s just something about seeing the sunrise come up in your windshield and the excitement of being somewhere you’ve never been before draws me to it, I wish I could’ve started my motorcoach business 20 years ago. I’m glad your bus is running well and I hope you stay safe on the road.
Scott....Sincerely happy the bus is doing great! Understand the anxiety as well! It seems like everything I do to my cars there are always "bugs" to get out! Look forward to EVERY video!
G'day Kevin from Australia. I'm glad all your performance upgrades have worked out it's a great feeling when all your plans come together and deliver. Still would love to see some pictures of your VW. ✌
Putting new life in an old dog!......good to see that Lenny's rejuvenation's are paying off, a few leaks but as a dog owner you know they are gonna leave their mark everywhere they go!
Great to hear good news about the engine and the performance. After all that, you deserve some noticeable improvement and not a bunch of headaches to chase after. Long Live Lenny !
Apparently Royal Purple's Purple Ice is touted as being superior to Water Wetter. I wouldn't know though, I just run a 60/40 mix with no trouble at all. Just going by what the so-called "experts" have to say about it.
Scott.... am quite sure (as I remember commenting to you, in another video a week or two ago), that even with a stock / factory turbo set-up... you realize that lots of internals (just about everything) will need to be changed.. unless when you rebuilt the engine that you used the full turbocharged "kit".... but then, if you did... your current "performance" level would "horrible" to say the least (not to mention - rolling coal), due to it still being NA at present. Which gear set are you running on your blower at present? The only option not necessitating all the turbocharged internals, would be if you're going with a low A/R turbo that is only yielding Up To about 7 or 8 psi (max) to the inlet side of the (NA) blower. Of course the 6-71 is capable of significantly higher outputs than what the factory specifications tell you.... if you're willing to "think outside the box", as I'm sure you realize.... yes? These engines are like the "small block Chevy" of diesel engines.... there is Lots of power to be had out of a small displacement engine.... the only "limiting" factor... as with many things in this life.... is how "deep" (or shallow) one's "pockets" are. ; )
Good luck on getting a answer from him about this! Why does he ignore people like you asking questions when you, obviously, know a LOT about what you are talking about?
One thing you got to remember about a Detroit with a turbo is when you run it hard on a hot day you have to let it idle for about 5 to 10 minutes to let the Turbo cool down and stabilize the oil because overtime if you don't do that it will actually cause the bearings to fail. The other thing I heard about Detroit if they're not leaking oil you're out of oil LOL, love the sound of the two cycle Detroit now I drive a 500 horse Cummins
Glen G..... that should be remembered with All turbocharged diesels, not just DD's..... and it's more about allowing the Turbo, time to cool down as well as the oil.... you don't want a "Hot" turbo still spinning at thousands of rpm with No oil flow.... it Will, cost you at some point.
Add an auxiliary electric oil pump to1- pre pressurize engine bearings before startups. 2- put a two minute 'on' timer to turn it on to cool off the turbo bearings after engine shut-off. Your turbo should last much longer, maybe the life of the engine. A variable vane turbo would probably work best for this- it reduces turbo lag, feels like you get more torque in the lower RPM range. Add an intercooler, alcohol/ water injection,and you'll double the peak HP and keep it cool running. 😉😎
We have to do this with turbocharged air-cooled aircraft engines. After you land you run it at the very least 5 mi utes to allow cooling. I allowed 10 minutes, 5 minutes slow taxi and 5 at about 1200 rpm before shutdown. The problem you get if you don’t is the oil bakes onto the turbine shaft and then that baked on residue begins to chew up the bearing
Scott, really glad to hear that the 4v head was an improvement even without the turbo. One has to think that Detroit made the switch for a reason since a vast number of 6-71N 4v engines were made without a turbo that it was worthwhile to build them that way. Can you update on the oil consumption pre/post in-frame? Curious on how much you're using in a fresh 6-71. Safe travels!
@@Romans--bo7br Could probably go another size, or two larger on the injectors too... if you can't make it smoke now, you definitely don't have an excess of fuel... so when you add more air with the turbo, you may not see that much of a difference in power. Typically, you add air to clean up the unburnt fuel which is the smoke. So if you can't smoke now, you aren't going to see much of a difference.
I so want a new engine for my 82 air cooled Westphalia with 10 more horse power. Just amazing listening to you, I don't even turn my TV on any more because i watch you tube on lap top. Will be burning midnight fires in my shop soon. If you ever get to Washington i have plenty of parking.
What great and informitave video's you compile thank YOU for going the extra mile explaining as you do (I am concidering a 4-71 for our mane generator because of their dependibility we live in central Maine and are 100% solar 20 years now Love it No power outages. 100 Points again it sure must feel great no leaks.
Scott! Good news, brother! O-rings can be a pickle, they behave differently under draw (vacuum) than pressure. Thus, I always test then under vacuum. Glad you're enjoying some real power benefit, bet you'll see some results in the fuel consumption area as well. What's with the three thumbs down? No way, man! Happy to see you're doing well.
Glad to hear your reaping the benefits of your investment in to your bus. I am very interested in the repair of this Eagle. I have not been under my Eagle yet so if this on has a Dropbox on it would your show it and where to add oil to it?
Speaking of cooler air, in the early 90s I was hauling liquid nitrogen fertilizer to farms in the spring. Round trip 60 miles with a particularly steep hill just after a sharp turn I had to slow down for. 1970 White 9000, 671, 10 spd, tandem axle, 3200 gal tank, 15 T payload. 1 gear higher every morning early than later runs. Every time.
Congrats on the successful mods. You're making me miss my 7.3 OBS Powerstroke... Installed larger injectors, HPOP, improved turbo - she would 'roll coal' and bury the needle effortlessly, allegedly...
What's that ol' sayin' that when you do new stuff the old stuff just got older; if it breaks, it's old. Grab the good times while they let ya! Blew the first o-ring, now fully pressured fuel pump, guessing you're done with the compressor system already, luckily! What next, something to wait for, and an excellent excuse for turbo then. Enjoying the Journey! Thank you.
Long Grove, IA! That's just about 10 miles from my house in Bettendorf, IA! Neato! Hope you have fun! I'm on vacation in Alabama all week otherwise I'd have loved to meet up for a few.
When I saw you in the video rebuilding the lower section of that filter housing, I was relieved. That lower section can give you fits of trouble, people take that lower "O" ring for granted. I had one of those 382 filter housing give me loads of trouble in a Mack I owned. I rebuilt that lower section of that housing several times before I got it to quit loosing prime, actually had the truck die on a set of RR tracks after sitting idling waiting for the train to go by..Nightmare. Best advise, make sure there is fuel in the dome tonight, then see if it has gone down in the morning. Then after you replace that lower "O" ring, idle the bus for a while, then run it a fairly high RPM and look for bubbles in the dome. Mine would send small bubbles up the dome at high RPM. But at idle the fuel level would steadily get lower. I know you have dealt with those before, just putting things out there in case I hit something you didn't see before. Good to have more power Scotty. Put's a smile on your face when you know your going in the right direction. Governing it back will just make you grumpy, and you'll turn it back up. As far as putting your foot in it, and it smokes..........BRING THE SMOKE. Maybe you'll make a snowflake pull over and have to find a safe room. Clear sky's and good tail winds.
Very cool that you are in Iowa ! You are on the eastern side, a bit north of I-80 and I live on the western side ( 1 mile East of the Missouri River ) about 1/2-hour north of I-80.
Uh Oh... Scott is entering his second childhood! More speed, more power, passing trucks, pegging it at 80 mph... Next I figure he'll be adding a nitrous bottle and cherry bomb mufflers. Who knows, he may even take another 10 seconds off his 0-60 time! 🤣
I know you have done your homework on the turbo upgrade you are planning. Blower bypass mod, lower compression pistons, bigger injectors.... all things I understand need to be done. I have an 8V71 NA Crown supercoach that I want to also do a turbo upgrade on. I already need new liners, so the compression and injectors are no problem. I have to go in there anyway. Any other MUST do mods (other than the obvious external hardware)? My cooling system is in awesome shape. I've just heard a lot of talk about everything being different between turbo and non turbo block, heads, timing, etc. I'd really like to talk with you more about your approach to your conversion, and the best place to get the parts like the blower tophat, exhaust manifolds, etc. Exhaust is no problem for me. I can fab my own out of SS (I have a TIG). Not looking to do a Cleatus upgrade, I just want to pull hills strong. I am considering a dual turbo setup rather than single for faster spoolup. I just want to be assured that I can do a mild boost on NA block and heads and cam without too much issue. BTW, if you need help fabbing a custom downpipe and such, i can definitely help you out there. Also, where do you source your motor mounts? I tried US coach and they didn't show anything for a Crown on their site, though I suspect the mounts are pretty generic. I want to change the mounts while i have access during my re-sleeving.
A trick that a bush mechanic taught me was soak an oring in alcohol for a few hour and it will shrink back down. Best to get a new oring but sometimes that is not possible.
I've always wanted to ask you if you can see the road with those bikes blocking your headlights at night bro.? Hopefully you've got clear visual. I love your bus bro, it's definitely a true classic they just don't make them like that anymore, and the designer for the Greyhound buses back in the day sure knew what he was doing on the designing features. I think your show is awesome too.
A 10 second improvement on a 0-60 for a bus is insane fast. It must literally feel like a rocket ship now. When you get the turbo, it will feel like you dropped almost 2 tons of weight off your bus instantly.
If you’re still looking for springs for your bus there is a place on the north side of Davenport not far from where you are called Sadler Power Train. They might have what you’re looking for. I used to drive school bus and that’s where we got all of our replacement springs for the buses.
Shouldnt your fuel filter bowl be hanging down. I once had an onan in an old sailboat and it had a glass bowl but it was installed hanging down not upside or on top like yours is.
I knew Lenny was going to do just fine I bet he loved passing those tractor trailers ,,you know what Lenny really wants is to pass a newer Greyhound but that may take a turbo and a very heavy foot LOL
It's nice to have hard work pay off. Is your engine original to the Bus? I was just thinking about building a second engine for the turbo then doing a swap. All you would need is a shop and $$$$. I had a friend who did conversions on Eagles back in the '70's. He ought busses direct from Trailways. Each conversion came with a new Honda 600 on a tow bar or a knock down golf cart that fit in the belly.
What does that Detroit tack out at ? My old 350 Cummins tacked our at 2,450 and my top speed with 22.5 tires was 80 and with 24 was 85 . With a return fuel restriction it bumped it up some and didn’t hurt my fuel economy.
Sounds awesome - all that hard work that you and your son have done has paid off! Just for giggles, have you considered a super charger in lieu of a turbo? From looking at what you said on the four valve installation, it looks like the head has to come off. Just wondering if that is an option.
detroit diesels already have a roots blower running of the crank. you don't want 2 robbing power. Turbo is the right thing, and they came stock that way. Look at the marine applications and you will see how much power they can make if you let them. as in double of what Lenny makes now
Regarding your comment about speed and self control, I guess we all understand that one. For me, using cruise control helps as I have to make a conscious effort to adjust the cruise speed up or indeed down.
I know you’ve said that it was important to watch engine temperatures while driving, how are the temperatures with all the changes that have been made. I thought there might have been a slight increase.
I never heard it put in those exact words but I've experienced that "I should check the car based on the oil spot on the ground." I had leaking valve covers and power steering lines at the same time before. Accessory belt life was 1-2 weeks. Worst part was it was a 22 year old engine without a drop on the outside before that.
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Your biggest torque and fuel economy gain was the 4 valve head. We used to do big port sleeves, N-65s and A timing with the 2 valve heads, and that elminated most of the smoke, but the 4 valve head gave 2-3 MPG better fuel economy PLUS more torque. The fuel saving figure caused the owner to finally wake up to the fact that, with increased efficiency, better power AND no more smoke tickets, a full N series conversion with a new head would pay for itself within a year's normal operation. One thing they learned over time was that smokeless exhaust from the conversions increased engine life between rebuilds by roughly 100K miles. The 4104s were the busiest buses in the fleet and ran the most mileage, so the whole fleet got the treatment as they came up for rebuild. Only one of the 4103s got it. Being light compared to the 04, it became known as "The Rocket." Neither of the 3751s got it and were retired as the 4106s came in.
Glad your bus is delivering performance and living up to your expectations. A testament to your knowledge and expertise with the 2 strokes.
Nice to hear you were trouble-free on the 300-mile shakedown trip, I wish you many more hassle-free miles in your future.
Work safe, stay cool
Doug@ the "ranch"
Sounds as though everything is getting off to a good start! Those Old School GM engineers undoubtedly looked down upon you from the Heavens today and smiled.
michigandon..... I know what you mean.... and I have a personal "tie" with one of those "Old School Engineers" myself. I personally, studied Diesel Engine Design & Theory (as a prep for R&D work), specializing in 2 cycle diesels for 4 years back in the mid 1960s (1963 - 1967), and was fortunate to have come personal tutelage of Mr. P. Nicholas, who had just retired from GM Diesel Power (Detroit Diesel after 4/1965) at R&D.
He was one of the original lead designers of the Very First 2 cycle prototype diesel engine - which was a 4-71, and I have a framed 8x10" B&W photo which he gave me after I came back from VN the last time in the fall of 1970.... of himself, "Boss" Kettering and a third engineer whom I've forgotten his name at the moment, that was taken just moments after the prototype was fired up for the very first time.... it's hanging on my wall, just above my desk here, as I'm typing this. I have been offered many hundreds for it, but it's not for sale and the Sentimental value of it for me, personally... is priceless!!
Taking 10 seconds off your 0-60 time is pretty damn significant!
I second that.
Once you get the turbo, you will go from ludicrous speed to plaid!
@Michael Francis If the jam is raspberry, LONESTAR!
Today, one of our cats dragged a mouse into the house. As me and the wife were ripping apart the livingroom to catch the little bastard, I came across my Spaceballs DVD. Strange.
Be careful, or he might lose the bleeps, the creeps and the sweeps...
We ain't found shit!!
I recall when I drove a Silver 92 435 hp back in 77/78 you had to kind of hold back on the downhill if you where about to go right back into climbing up the
other side of say a river valley with a bridge at the bottom. If you held it back and had a little bit of throttle to go, you could start building boost pressure
before you where into the climb. Otherwise you had a serious lag before the boost pressure came up. Keep in mind the blower is gear driven, and that
in turn will control the exhaust flow coming out of the cylinders that spool up the exhaust turbine and hence the compressor wheel on the turbo.
Try to keep the load constant for best results. I wonder if anyone ever tried putting a VGT on a 2 stroke Detroit ? I have a good 2v 6 cyl head ( core ) I’ll
give away but I live near Toronto.
I know that others have said this before, but, when you do put the turbo in, get a pyrometer and watch the EGT's going up hills. Congrats on the performance improvements!
Glad the upgrades all worked out,....love that detroit!
A common add on with those fuel processors is a one way check valve on the fuel tank inlet line, fuel can enter the filter from the tank but it can't drain back. A big help when you do a filter change as well. The worse that can happen if you have a leaking filter housing is the filter empties you don't loose supply line prime. You must be using a lot more of the engines power now, horsepower needed to push a vehicle is not proportional to speed, double speed needs 4 times the power, that extra 4 mph is around a 5% increase in speed , you are using another 15% or so of engine power, those bigger tyres are helping a lot. Sounds like you need a faster rear axle if you are still managing to sit on the governor at 70mph
Replace the Clear dome on that fuel filter assembly. It's getting discolored and they're really not expensive - it'll give you new O rings and be crystal clear so you can see what's going on that much easier.
Family Tradition Transportation everyone likes this!!!
I love those old buses and remember (I'm 71) as a kid you had to really hustle to keep up with the early mid 60's Greyhound/Detroit buses. They would get it. When Daddy ditched his 6 cyl. Chevy and got his first 283 that fixed that. But he was still amazed on the route up a major highway near by into a number of small communities pre interstate how those drivers would haul butt. At the last redlight before a long stretch of open road when the green came you would see the driver hammer down as evidenced by the exhaust note and smoke. Before you knew it he was doing 65-70 ~ or more (?!) and haulin! I loved it as a kid and your videos bring fond memories with dad, mom and I enjoying an afternoon of chasing a Greyhound up Hwy 43 with us all amazed how fast he could (and would) go!
Great to hear all the performance
benefits from your recent engine work !!
And it’s not raining ....lol.
A great day !!
Absolutely loving your work. Doing all the right things. You won't know it when you turbo it! You'll be grinning like a Cheshire cat 😻 I can't wait for the turbo upgrade myself! 👍👍
Detroit8V92tta I reckon! Going to rip along.
I recently moved back home to help my elderly father with things around his place, and came face to face with something I'd forgotten from my childhood: A mural off of old Dixie Highway with a Silversides featured prominently. I seem to recall you mentioning something about Lenny being on a route that included Chicago, and it dawned on me at the time that this mural might in fact be of him or one of his siblings, as the ol' Dixie is U.S. Route 1, and was likely part of that route. Though I can't confirm that, as I wouldn't know where to start when it comes to looking up old routes.
Don't feel bad...most of the drivers in the old days drove them as hard as they would go. There was always stuff torn up on them. Damaged front ends where they rear-ended people, blown tires from sideswiping curbs, you name it.
Great to hear that all your hard work is paying off in performance improvement on your bus. I enjoyed your video and update, thanks.
I have to give you credit for being willing to hit the road and go anywhere in your old bus. Hell, I got a modern motorcoach and I get nervous taking it out. I guess knowing that I’m hauling passengers causes me concern about breakdowns. I love being on the road in a motorcoach. I had a completely different career for 30 years and started driving a motorcoach part time just to have something to do. I never thought I’d love it so much. There’s just something about seeing the sunrise come up in your windshield and the excitement of being somewhere you’ve never been before draws me to it, I wish I could’ve started my motorcoach business 20 years ago.
I’m glad your bus is running well and I hope you stay safe on the road.
I stumbled across your channel. You have the most beautiful vintage bus I've seen here on youtube
Congratulations
Have a safe trip
Scott....Sincerely happy the bus is doing great! Understand the anxiety as well! It seems like everything I do to my cars there are always "bugs" to get out! Look forward to EVERY video!
Great to hear that Lenny is running better than ever! It’s an awesome feeling pulling a hill with new found power.
great update. i knew there was no way you wouldnt gain some performance from that head. glad to hear your pleased!
G'day Kevin from Australia. I'm glad all your performance upgrades have worked out it's a great feeling when all your plans come together and deliver. Still would love to see some pictures of your VW. ✌
It is really nice to do all that work and spend all that time, and then see and feel that payoff. Good work Scott.
Putting new life in an old dog!......good to see that Lenny's rejuvenation's are paying off, a few leaks but as a dog owner you know they are gonna leave their mark everywhere they go!
Glad things are going well with the upgrades, and thanks for taking the time to bring us along on your journey. Keep up the good work
Great to hear good news about the engine and the performance. After all that, you deserve some noticeable improvement and not a bunch of headaches to chase after. Long Live Lenny !
I'm happy for you Scott 😊 great job on Lenny I'm sure he's happy
Watch that temperature..... especially when you add the turbo.
Adding Water Wetter to the coolant is great insurance.
Apparently Royal Purple's Purple Ice is touted as being superior to Water Wetter. I wouldn't know though, I just run a 60/40 mix with no trouble at all. Just going by what the so-called "experts" have to say about it.
@@stanpatterson5033 They're all about the same... 1-2% difference in the real world is basically zero.
Awesome to hear the time and money you spent on Lenny made major improvements. Usually the mechanic's vehicle is the last one to get attention.
Great job, so good to hear the bus is doing better, 65 - 70 is plenty fast in a bus, Great video stay safe.
Scott.... am quite sure (as I remember commenting to you, in another video a week or two ago), that even with a stock / factory turbo set-up... you realize that lots of internals (just about everything) will need to be changed.. unless when you rebuilt the engine that you used the full turbocharged "kit".... but then, if you did... your current "performance" level would "horrible" to say the least (not to mention - rolling coal), due to it still being NA at present. Which gear set are you running on your blower at present?
The only option not necessitating all the turbocharged internals, would be if you're going with a low A/R turbo that is only yielding Up To about 7 or 8 psi (max) to the inlet side of the (NA) blower. Of course the 6-71 is capable of significantly higher outputs than what the factory specifications tell you.... if you're willing to "think outside the box", as I'm sure you realize.... yes? These engines are like the "small block Chevy" of diesel engines.... there is Lots of power to be had out of a small displacement engine.... the only "limiting" factor... as with many things in this life.... is how "deep" (or shallow) one's "pockets" are. ; )
Good luck on getting a answer from him about this! Why does he ignore people like you asking questions when you, obviously, know a LOT about what you are talking about?
Glad that all your mods worked out ,it’s nice when you can see the results of your efforts.
One thing you got to remember about a Detroit with a turbo is when you run it hard on a hot day you have to let it idle for about 5 to 10 minutes to let the Turbo cool down and stabilize the oil because overtime if you don't do that it will actually cause the bearings to fail.
The other thing I heard about Detroit if they're not leaking oil you're out of oil LOL, love the sound of the two cycle Detroit now I drive a 500 horse Cummins
Glen G..... that should be remembered with All turbocharged diesels, not just DD's..... and it's more about allowing the Turbo, time to cool down as well as the oil.... you don't want a "Hot" turbo still spinning at thousands of rpm with No oil flow.... it Will, cost you at some point.
Add an auxiliary electric oil pump to1- pre pressurize engine bearings before startups. 2- put a two minute 'on' timer to turn it on to cool off the turbo bearings after engine shut-off. Your turbo should last much longer, maybe the life of the engine. A variable vane turbo would probably work best for this- it reduces turbo lag, feels like you get more torque in the lower RPM range. Add an intercooler, alcohol/ water injection,and you'll double the peak HP and keep it cool running. 😉😎
We have to do this with turbocharged air-cooled aircraft engines. After you land you run it at the very least 5 mi utes to allow cooling. I allowed 10 minutes, 5 minutes slow taxi and 5 at about 1200 rpm before shutdown. The problem you get if you don’t is the oil bakes onto the turbine shaft and then that baked on residue begins to chew up the bearing
Scott, really glad to hear that the 4v head was an improvement even without the turbo. One has to think that Detroit made the switch for a reason since a vast number of 6-71N 4v engines were made without a turbo that it was worthwhile to build them that way. Can you update on the oil consumption pre/post in-frame? Curious on how much you're using in a fresh 6-71. Safe travels!
By putting a turbo on that DD 671 will make Scotty say " I'm giving it all she's got"
siemenstraffic.... it Will take a lot more than just adding a turbo to be able to say "I'm giving it all she's got".
@@Romans--bo7br Could probably go another size, or two larger on the injectors too... if you can't make it smoke now, you definitely don't have an excess of fuel... so when you add more air with the turbo, you may not see that much of a difference in power. Typically, you add air to clean up the unburnt fuel which is the smoke.
So if you can't smoke now, you aren't going to see much of a difference.
I so want a new engine for my 82 air cooled Westphalia with 10 more horse power. Just amazing listening to you, I don't even turn my TV on any more because i watch you tube on lap top. Will be burning midnight fires in my shop soon. If you ever get to Washington i have plenty of parking.
What great and informitave video's you compile thank YOU for going the extra mile explaining as you do (I am concidering a 4-71 for our mane generator because of their dependibility we live in central Maine and are 100% solar 20 years now Love it No power outages. 100 Points again it sure must feel great no leaks.
Scott! Good news, brother! O-rings can be a pickle, they behave differently under draw (vacuum) than pressure. Thus, I always test then under vacuum. Glad you're enjoying some real power benefit, bet you'll see some results in the fuel consumption area as well.
What's with the three thumbs down? No way, man! Happy to see you're doing well.
Kid with a new toy,glad all the improvements are working !!!!
Glad to hear your reaping the benefits of your investment in to your bus. I am very interested in the repair of this Eagle. I have not been under my Eagle yet so if this on has a Dropbox on it would your show it and where to add oil to it?
Speaking of cooler air, in the early 90s I was hauling liquid nitrogen fertilizer to farms in the spring. Round trip 60 miles with a particularly steep hill just after a sharp turn I had to slow down for. 1970 White 9000, 671, 10 spd, tandem axle, 3200 gal tank, 15 T payload. 1 gear higher every morning early than later runs. Every time.
10 seconds is HUGE. Nice work! And they aren't nicknamed 'screaming Detroits' without reason.
I don't get stuck behind trucks. They get stuck behind me. Passing uphill in a Silversides?. Mine will pass the time, but that's about it.
I see propane in my future, well you can't see a gas but you get my drift. love your videos Scott.
Who says you can't see a gas?
Like trying to keep the secondaries from opening on a four barrel carb. That's why I took the two barrel off, I want power!
Hey Scott great line I can't govern yourself...Enjoy it right...Txs for the vlogs...
Love to hear about the outcome of these improvements. I can't wait to hear how the turbo changes the driving characteristics.
Congrats on the successful mods. You're making me miss my 7.3 OBS Powerstroke... Installed larger injectors, HPOP, improved turbo - she would 'roll coal' and bury the needle effortlessly, allegedly...
What's that ol' sayin' that when you do new stuff the old stuff just got older; if it breaks, it's old. Grab the good times while they let ya! Blew the first o-ring, now fully pressured fuel pump, guessing you're done with the compressor system already, luckily! What next, something to wait for, and an excellent excuse for turbo then. Enjoying the Journey! Thank you.
I’m glad all your hard work and the money you spent paid off. 👊
Long Grove, IA! That's just about 10 miles from my house in Bettendorf, IA!
Neato! Hope you have fun! I'm on vacation in Alabama all week otherwise I'd have loved to meet up for a few.
When I saw you in the video rebuilding the lower section of that filter housing, I was relieved. That lower section can give you fits of trouble, people take that lower "O" ring for granted.
I had one of those 382 filter housing give me loads of trouble in a Mack I owned.
I rebuilt that lower section of that housing several times before I got it to quit loosing prime, actually had the truck die on a set of RR tracks after sitting idling waiting for the train to go by..Nightmare.
Best advise, make sure there is fuel in the dome tonight, then see if it has gone down in the morning.
Then after you replace that lower "O" ring, idle the bus for a while, then run it a fairly high RPM and look for bubbles in the dome. Mine would send small bubbles up the dome at high RPM.
But at idle the fuel level would steadily get lower.
I know you have dealt with those before, just putting things out there in case I hit something you didn't see before.
Good to have more power Scotty. Put's a smile on your face when you know your going in the right direction. Governing it back will just make you grumpy, and you'll turn it back up.
As far as putting your foot in it, and it smokes..........BRING THE SMOKE. Maybe you'll make a snowflake pull over and have to find a safe room.
Clear sky's and good tail winds.
Love your bus. What do you think of the 8v92 sliver
Very cool that you are in Iowa ! You are on the eastern side, a bit north of I-80 and I live on the western side ( 1 mile East of the Missouri River ) about 1/2-hour north of I-80.
Nice, I was really keen to know how the upgrades worked out. Cheers.
The elbow grease paid off. Looking good. So if you wanted to you can turn up the governor to cruise at 80mph?
Uh Oh... Scott is entering his second childhood! More speed, more power, passing trucks, pegging it at 80 mph... Next I figure he'll be adding a nitrous bottle and cherry bomb mufflers. Who knows, he may even take another 10 seconds off his 0-60 time! 🤣
Mmm-hmm...It's like I thought - Lenny's becoming a hot rod. A big, shiny hot rod that's disguised as a bus. I subbed to this channel just in time.
Scott - A 70 year bus at warp speed - wow - Safe journeys - kind regards Clay
Happy that everything performed well. Sounds like the improvements work well together.
I know you have done your homework on the turbo upgrade you are planning. Blower bypass mod, lower compression pistons, bigger injectors.... all things I understand need to be done. I have an 8V71 NA Crown supercoach that I want to also do a turbo upgrade on. I already need new liners, so the compression and injectors are no problem. I have to go in there anyway. Any other MUST do mods (other than the obvious external hardware)? My cooling system is in awesome shape. I've just heard a lot of talk about everything being different between turbo and non turbo block, heads, timing, etc. I'd really like to talk with you more about your approach to your conversion, and the best place to get the parts like the blower tophat, exhaust manifolds, etc. Exhaust is no problem for me. I can fab my own out of SS (I have a TIG). Not looking to do a Cleatus upgrade, I just want to pull hills strong. I am considering a dual turbo setup rather than single for faster spoolup. I just want to be assured that I can do a mild boost on NA block and heads and cam without too much issue. BTW, if you need help fabbing a custom downpipe and such, i can definitely help you out there. Also, where do you source your motor mounts? I tried US coach and they didn't show anything for a Crown on their site, though I suspect the mounts are pretty generic. I want to change the mounts while i have access during my re-sleeving.
Turbo ?LP gas? you have been spending too much time on Cleetus' channel .
It is very nice to hear that all the work has payed off. Question : How many lbs of Boost are you looking for the Turbo to provide? Ted.
Sonic the Silverside Driver: Gotta go fast!!!
A trick that a bush mechanic taught me was soak an oring in alcohol for a few hour and it will shrink back down. Best to get a new oring but sometimes that is not possible.
I've always wanted to ask you if you can see the road with those bikes blocking your headlights at night bro.?
Hopefully you've got clear visual.
I love your bus bro, it's definitely a true classic they just don't make them like that anymore, and the designer for the Greyhound buses back in the day sure knew what he was doing on the designing features.
I think your show is awesome too.
Get a cruise control, the electronic ones are quite easy to fit and take the stress out of long journeys.
Great report. Thanks.
A 10 second improvement on a 0-60 for a bus is insane fast. It must literally feel like a rocket ship now. When you get the turbo, it will feel like you dropped almost 2 tons of weight off your bus instantly.
Awesome! Cant wait for the upcoming videos!
Those wires hanging by the hitch would drive me nuts....😁
Sounds like with your upgrades wity engine retrofit and tires you classic bus is able to do circles around some of the modern buses at highway speeds
If you’re still looking for springs for your bus there is a place on the north side of Davenport not far from where you are called Sadler Power Train. They might have what you’re looking for. I used to drive school bus and that’s where we got all of our replacement springs for the buses.
Shouldnt your fuel filter bowl be hanging down. I once had an onan in an old sailboat and it had a glass bowl but it was installed hanging down not upside or on top like yours is.
Love your video's, keep them coming!
When you’re on these road trips what kind of traveling music do you enjoy?
_The wheels on the bus go round and round..._
I knew Lenny was going to do just fine I bet he loved passing those tractor trailers ,,you know what Lenny really wants is to pass a newer Greyhound but that may take a turbo and a very heavy foot LOL
It's nice to have hard work pay off. Is your engine original to the Bus? I was just thinking about building a second engine for the turbo then doing a swap. All you would need is a shop and $$$$. I had a friend who did conversions on Eagles back in the '70's. He ought busses direct from Trailways. Each conversion came with a new Honda 600 on a tow bar or a knock down golf cart that fit in the belly.
I hope you don't mind me asking what it's like to drive and own a classic grayhound bus?
What does that Detroit tack out at ? My old 350 Cummins tacked our at 2,450 and my top speed with 22.5 tires was 80 and with 24 was 85 . With a return fuel restriction it bumped it up some and didn’t hurt my fuel economy.
How do you like your Silverside? That was my favorite bus when I was a kid. Not the biggest, but definitely the most classic looking rig
Sounds like Lenny is ready for Burning Man and beyond!
Great result for all your hard work 👍🇦🇺
what we been waiting on..
Sounds awesome - all that hard work that you and your son have done has paid off! Just for giggles, have you considered a super charger in lieu of a turbo? From looking at what you said on the four valve installation, it looks like the head has to come off. Just wondering if that is an option.
detroit diesels already have a roots blower running of the crank. you don't want 2 robbing power. Turbo is the right thing, and they came stock that way. Look at the marine applications and you will see how much power they can make if you let them. as in double of what Lenny makes now
With all your upgrades, did you gain any mpg along with the power.?
Greetings from Mason city Iowa only 3 half hrs away. Enjoy Iowa (:
Do you have a Jake break on your bus?and do you have cruise control?
The governor is the cruise control, you just put your foot down and it runs along at the max governed RPM.
@@lukestrasser What would be the rpm at 70 mph?
I think the four valve head is helping the scavenging cycle.
The filter is probably on the suction side of the fuel pump. 2 minutes of idle probably allowed more air to be sucked in .
Is there a rebuild for the blower, or a must replace?
Seem like a wear out part that might suffer some blow-by after a million miles.
Regarding your comment about speed and self control, I guess we all understand that one. For me, using cruise control helps as I have to make a conscious effort to adjust the cruise speed up or indeed down.
Herd you were going to put a turbo on ... Might I suggest a switch blade turbo jaypaydirt has a couple of them in his equipment and he loves them.
I know you’ve said that it was important to watch engine temperatures while driving, how are the temperatures with all the changes that have been made. I thought there might have been a slight increase.
All the performance your getting is all in the 4 valve head and the injectors we do that to every Detroit and we get
If the bus could do 80 mph. IT WOULD ,HAHAHAH Love your channel GOD BLESS
Rick
I like your bus, I wish I had the means to build one.
I already can't wait for tomorrow lol
I played with corvairs in my youth and when the oil spots got smaller I new I better check the oil level
I never heard it put in those exact words but I've experienced that "I should check the car based on the oil spot on the ground." I had leaking valve covers and power steering lines at the same time before. Accessory belt life was 1-2 weeks. Worst part was it was a 22 year old engine without a drop on the outside before that.
as i did wright on your filter video:
"sounded greate but looked at the end of it that you had fule dripping from the filter still."