Big Cam Cummins STC Dyno Tune
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- เผยแพร่เมื่อ 9 ม.ค. 2019
- In this video, we tune a newly rebuilt Cummins Big Cam STC. It initally made more power than requested, so we had to take it down a notch by swapping the button in the pump. For more information on swapping the button, watch the following video. • Video
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Never have I seen a big rig dyno test - this was awesome!
That's a slick Dyno,I worked for a shop near Huntington WV a long while ago,had to chain em down but could still load the same,loved the ol big cam
great video, love seeing a mechanical restored and properly tuned!
That big cam Cummins sounds so so good 👍👍👍👍👍
My first truck a K-100 had a big cam 4 400 Cummins. I sure do miss that truck!
That’s the coolest dyno I have ever seen
Why in the world would anyone want less power !?!? I would love to have it the way it started out . A nice strong Big Cam 👍 great job guys 😎
The customer wanted exactly 425, but it would have been perfectly reliable at 500.
This is probably not the case, but I drove trucks in the oilfield moving drilling rigs and we had the engines turned down for fear of tearing up equipment in heavy mud and sandy soil. Same applies to silage trucks driving in the field.
Yup every application is different
More power burns more fuel in some situations also
More power requires more fuel. If you only pull 80k gross. You shouldn't need 500hp. I am pulling 140k on almost flat ground and I have 500hp/1850lbft. Gets 2.2km/L(5.2mpg us/6.2mpg imp). More power is nice, I drove gravel truck for four years I liked the 450hp trucks better than the 550 and 600hp trucks. Same roads, same 20,000kg loads. The 450hp trucks did the same number of loads in the same time, but used 50-75L(15-20G) less everyday. With fuel at $1.40/L(2012-13) That's a huge difference over a year
$1.40/L x 50L x 5 days x $350 x 52wks is $18200 a year
$1.40/L x 75L x 5d x 52w = $27300 year per truck per year. I spent $44k on fuel from March to Dec 31 for one truck. The company I worked for had 10 gravel trucks and 4 tractor/live bottoms trailers. They were spending $50k a month on fuel. So every little bit counts. Not to mention more power is more stress and that leads to shorter engine life
500 is a good number. I would have stuck with that for sure.
Nothing like the sound of a Big Cam...music to my ears:-)
No no, now come on, yes this Cummins motor sounds brutal, but CAT 3406B - 3408 Special and 3412 are already abnormal in terms of sound and power because it makes the hair on the back of your neck rise from the sound! Greetings from Tirol-Austria !!
We had 3 of these old school engines in high school when I was on my final year back in 2010.
Sounds amazing!! Nice!!
I would like to see more things about the mechanical Cummins and cat
That is one badass Pete! My old 67 Pete 335 put 412 to the ground it had 5 million miles when l replaced it with big cam 3. It got stolen in 2010 by Robert Verdugo in Perris Ca.
Oo ooh that smell, I love it
I can’t believe I’m just now subscribing
I remember one of the apprentices asking an old timer "how do you know if an engine has STC" his response "if it sounds like two skeletons fucking on a tin shed its got STC" 😂😂😂
Nice to see a dyno bay without chains and chocks! Would have loved to have lived without that fiasco back in the day!
Loved greetings from Brasil
Would love to see an E9 mack on there
Bad ass dyno
Cool video big rig on a dyno
Great video
Input: ‘87 BC-IV 400. Dynoed it at the dealer and was putting 335 hp to the ground! WHAT!!! I said! Yep, it’s within specs! Waited ‘til the warranty expired then went from (I believe) a 22 button to a 10! Ran strong! Sold it at 265000, knew the guy, first OH at 300000! Another one I bought new, A BC-III ‘83 ran a little better from new. OH at about 375000 in stock trim. Put in the no. 10 button, the BC-III was a better running engine than the BC-IV. Ran very well except that in needed an OH at about every 150000 after the no. 10 button was installed!!! Sold it at 900000 with a fresh OH. This may shed some light on why you don’t want put too much fuel to these older Cummins. As a plus, they are cheap and quick to OH. Did an inframe with new heads in a 24 hr stretch. (yea the good old days) And, if can remember right, was less than $2000 in parts. These are great and economical engines if you can work on them yourself. Probably hard to find anyone willing!!! Motor On!!!
One day I hope to understand literally anything you just said
@@DylanO0505 Lemme guess…….You have no idea what a BC-IV 400 is? Must be of the ideals that any engine problem is going a minimum of 20K. Sooooo glad I bought a set of engine manuals written by the engineers so I can understand it $200 for my ISX15 so I can ignore dealer/new wave mechanic input.
@@onebadapple83 I’m not into trucking just yet so nothing you said has any relevance to me but I do know that cummins is a great motor and 900k is a shit ton of miles haha
Thats interesting how the mechanical diesels work I'm not a college degree mechanic but I can work on things here and there but I love learning about how these old motors operate thank you
Man dad had 400 bc built by guys back in the 90 it was the fastest most powerful truck pound for pound I ever drove and I drove a lot of em
Must be nice having working roller brakes. Our dyno at work you have to pull trucks off with the forklift lol
First Pull I never seen the Boost even move? Since this is STC and most likely a 444 would it be beneficial to convert it to a High Flow Cooling system? And perhaps a FASS system for the fuel. Especially if going to a bigger Button on the fuel pump. I love these old Big Cams. So many things a guy can do and you don't need a LapTop to do them either!!
I have a request if u can make that podsible.lol my name is matt. I am a huge fan of what you guys do. I love trucks. And im a caterpillar fan. I was hoping the next time you guys dyno a 3406b model engine.if you could make a video of it? Thank u and have a wonderful summer.
I've hauled a lot of 105,500 loads in a 359 Pete long nose Big Cam IV great engine loved that old truck and engine combo. The 359 I drove originally had a buzzin dozen in it but Big Cam definitely more practical lol
Perfect... I've got a big cam 400 13spd. With a 3.90.... should 110k gross be a comfortable load? Btw 7/8" frame rail.
@@kendricpowell2780 not sure what gear ratio was in that truck? but yes the Pete I drove had a 13 speed in it too, good gearbox to have for heavy. Sounds like you've got a good setup as well. I did break a rear end and went through 1 clutch in that truck. Hard to say what the miles were on clutch and rear end
what was the button that putt over 500hp and what was the torque and pyro temps for that button too ?
Best sounding diesel ever built
Besides the 6.0 Powerstroke. Best Sounding Diesel By Far.
Second would be a 60 Series Detroit Diesel.
Bad Ass 6.0 Powerstroke or a 300 Mack
soo what buttons did you try? amd what is a the difference in power on each button you tried?
is the 500hp run using a #15 button? and the 460hp run usingg a #20? just curious . we have a #30 in ours. curious what a #20 will do for a gain roughly
What button sizes did y’all have on these 2 pulls?
How much torque does a big cam 400 have to the crankshaft? Aka stock
I always used a 10 button and a kt450 spring it really puts the cat killer in a cummins
If you don't mind me asking what do you mean kt450 spring. I know what a kt450 is but what spring are you referring to?
@@idreamofdragonso5677 get a Purple spring
@@nokiaicon Do you know the part number for the purple spring?
@@idreamofdragonso5677 I used to have them all ill try and find them for ya
@@nokiaicon Thanks appreciate it
I drove a souped up Cummins powered truck in the late 90s. The specific setup was a 444 BC-4 mated to a double over 13 with 3.55 rears turning 11r24.5 rubber. The pump injectors pistons heads and turbocharger were setup for 850 at the crankshaft. The maximum we got on a dyno run was 720 at the rears then the dyno broke with fuel pressure left to feed the engine. To give you an idea of the power of this beast we called Rose in Pennsylvania there's a nice pull on 80 called Snowshoe. I was going west heading back to Illinois with honey out of Philly we avoided the turnpike even then way to expensive. Well I'm at the bottom a steel hauler with a 550 Cat goes 100 bucks to anyone behind me that can pass me. I dropped half a gear into 11th and floored the go pedal. The other drivers I passed said I had a little black smoke rolling my right front almost picked up and she was screaming like a 747 at takeoff as I caught him. I started a half mile behind him and was 3 tons heavier in gross weight. I ate his Cat for dinner and Rose got polished that weekend thanks to that moron.
What’s the max horsepower you’d tune a isl Cummins to? Mines at 370 now. With a 3000 Allison trans.
It'd be great for you guys to show some videos on a 671 Detroit
Might as well dyno a lawn mower
The air-conditioning compressor is not mounted correctly
Do you guys only dyno semis? I've got a truck i want dynod but there is no dyno near me
Why can’t I watch the button video in the description?
What button to use for 500hp with the n14 turbo I'm guessing a 17 or smaller
I would like to see what kind of HP you can get out of a Big cam Cummins I know where one it now with around 300,000 original miles guy bought it brand new it’s just been sitting for a while
Name the instrument which used for diagnosis, where to buy and how you diagnose , please reply,
I WANNA SEE SOME BIG 60SERIES DYNOS
Granted I know different trucks have different trannys with a different number of gears, but out of curiosity what gear do you typically dyno these things in?
Direct
@@dieselfueled_ yea i was more so asking which gear was 1:1 in this truck. I know it’s the direct gear but I was wondering which that was.
Un big cam 3 sin el sistema STC puede producir 450hp? Es decir un nta855 big cam 3 normal puede llegar a obterner 500hp?
Very nice, can you do an n14 Cummins celect video if you get one in
Very nice 500hp @ 32psi of Boost😁😁
thats a strong engine
I miss working on the big cam 3's and 4's . I could make them pull. Believe it or nor without touching the pump , on a 1988 eagle if u put bigger fuel lines on it,( and they were bigger than the others, yoy would gain hp's .
Got a question
What is the cpl on that engine
Is the Cummins book still available? I picked one up from the Gats show in Dallas years ago, misplaced it and can’t find another one.
You can download parts of it online for free, or pay 20 bucks for a full pdf. I don't have the link but downloaded one a month ago for free. Or go to the junkyard and dig thru glove boxes.
If you have one or find one, they are gold. They pretty much listed all their secrets in them blue books...
please tell me how to increase the power of my engine nta855
Please post your dyno outputs with hp vs rpm instead of time. That would show a nice power curve that way.
It's very difficult to see RPM with the mechanical engines.
@@pittsburghpowerinc.5948 Normally they put a reflective sticker on the crank dampner and a sensor hooked to the dyno picks it up. That is the way the local Cat dealer did my truck when they dynoed it. It avoids relying on knowing the correct gearing in the truck to get the engine RPM from the roll speed.
My 84 bc3 has an electronic tac. Thread in the sensor on the bellhousing and away you go.
I have a bc 1185 400hp changed to hi flow and it has an intercooler ht60 billet turbo bigger injectors what button would be good in my case
Wouldn't mind 500whp
Is there an easy way to make my 300 big cam low flow system to a high flow system my buddy told me to change the water inlet fitting on the back of the block to a bigger house and bigger valve does this help never gets above 190 really but have had over heating problems in the past fresh rebuild stepped up to a 350 any advice would be helpful I'm happy with the performance really just want to flow more water
Ask Cummins, not a "buddy" unless he works for Cummins.
I did that for a customer some years ago, Marino Diesel, in Denver set me up with all I needed. Worked out perfectly.
What button did you finally install to keep it at 425hp
I have 91 mechanical N14 and it's not holding the fuel when I let it sit overnight. I have a fitting with a window right at the fuel pump and it's half full before starting the engine. It takes a bit for it to start and revs high like it has air in the fuel system. Had anybody ever ran into the same issue???
Yeah, why less power? More MPG? How’d you pick a target HP?
The customer specifically asked for 425, so that's what we gave him!
@@pittsburghpowerinc.5948 I assume its a corporate fleet truck since they wanted a certain power limit?
More reliable. High horsepower engines can burn if operated at peak power too long. An egt gauge must be fitted and monitored to prevent engine damage. High power wears parts.
Was that the big cam 400
what size button did you have in first?
Probaly a 15 or 20
I made a NTC 300 Formula BC3 wake up years ago....way too hot...750 at the crankshaft....
I thought making more power than requested was a good thing lol
Why are we so concerned with a 500+ hp number when we still only have a 12-1400 tq. Number?
Well if you want to go fast you need HP.
If you want to pull a lot of weight, you need torque (or at least a very low gear).
If you want to pull a lot of weight and go fast (or accelerate quickly), you need more torque _AND_ HP.
@@BenjaminEsposti
Exactly... The fact that the unit's purpose is pulling trailers. Torque is what's gonna get the work done faster.
Those older engines just did not make torque like the new stuff.
@@railfan8895 so basically they were forced to moved the loads through gearing in the older rigs where as now my 450hp rig is considered dry van spec with 1650 lb. Ft. Torque
@@kendricpowell2780 That's not actually true(I think there's a huge misconception about torque on the internet)... As Benjamin said, if you want to pull a lot of weight and go fast, you need torque /and/ horsepower. 2000 ft-lbs of torque at 5 horsepower will move the load, but it'll do it very slowly. Your time to maximum speed and rate of acceleration will be determined primarily by horsepower, not torque. Really, you just need torque at the wheels, not the engine(Maximum pulling force, from wheel torque, determines whether you can overcome enough friction to get the load rolling, horsepower determines how much of this rolling resistance your engine can overpower at a time. More power means more speed). Gear down a high-power, high-rpm engine enough and it'll move a semi truck load without issue. The problem is that it probably won't make 2 million+ miles at that same power level, and it'll be way less efficient due to the increased frictional losses at high RPMs. Gearboxes simply trade RPM for torque and vice versa. Horsepower is a product of the two, and stays constant through gear reduction (in an ideal world of course).
How do you bleed air from fuel in a Big Cam IV 400? Truck ran out of fuel due to fuel running to one side.
@ Pittsburgh Power, Inc. I saw the 500 WHP. 1. What's the Max Power and Torque this Cummins Big Cam STC can make?? 2. At what percentage below the Max Power and Torque do you recommend running this engine so that it doesn't wear out parts faster??
More Big cam videos
I sure wish y'all were closer to Tennessee. All we mess with is mechanical n14s and its very hard to find someone who can tune those specific motors
We have a number 12 in are 350 with 400 injectors it had a number 22 dont know the horse power
Yep you are definitely a semi driver, can't even use the proper our.
Torque is a little low, no?
NJ license plate?
What gear do you guys use? Does it give a one to one ratio?
What is the most you can get out of a big cam 400 or 444 cummins with out blow it up I know some of the old timer put number 3 or even a slug or call a 0 advance and play with the timing to make it hold but is that even possible???
We never adjust timing, it only leads to problems down the road. But we used to do twin turbo Big Cams that were 800+ to the ground
NTC475 compound turbo with larger injectors was capable of greater power, however the fuel pump isn't rated for more. That's why the KTA was rated from 1550 foot pounds to 1950 foot pounds of torque. The fuel pump on the KTA 19 was rated for higher pressure. Now the step timing on the N444x and mechanical N14 both had issues with the timing and the fuel pumps weren't meant for more than 500 horse power. Now you can get larger injectors with higher pressure but you would also need to beaf the pump
@@Darth-Nihilus1
You are Incorrect, PT pump is rated by gear thickness. 3/4", 1", 1 1/4". I have 3 KTA Cummins engines and they all have 3/4" pumps on them. My 855 has a 1" pump and makes 300 psi at 1800 rpms. Bigger the gear, more pressure at lower rpm.
@@johncholmes643 I did not know that thank you, hey what motor do you like better of the two? I don't have much experience with the KTA or the 855 other than a NTF 365 small cam and a NTC 400 III
I'm told that if you rebuild with all the fancy parts like ceramic and teflon coated pistons, high lift cam, pump injectors and turbo on a fixed timing engine, you can get up to 600hp on the flywheel.
What all did you guys do to the truck to make over 500hp
Have you guys done a 3208 cat with a blower installed
That looks like a 444 cummins
Hellooo where I can do dyno tune a my N14 500
is this engine the same as the big cam 4 or is the big cam 4 a different engine
Could watch these Dyno videos all day. Though I'm a bit surprised that a lot of these big trucks dont put down bigger numbers. For a 10liter plus truck that's almost harvester type power. Though I still wouldn't hesitate to stuff one in the frame of a F550.
You should hesitate lol. Even the straight beam axle in the front of the 2wd f550 will not support the wieght of the larger HD truck engines. Good friend put a kta and a ten speed. Drivers side steering knuckle folded up a week later. We were pretty disappointed.
Yeah this motor would barely fit it the bed. It's a 14 liter engine
Do a 3406E 550 CAT
Buy it and bring it in and they will lol.
What’s the best way to get 550 horsepower out of a 400 big cam and be able to haul 84,000 every day and hold speed going up hills
Depending on the engine CPL number, I'm told you can get 500hp with pump injectors and turbo, much more than that and you would want to rebuild with the fancy pistons and cam.
I wouldn't go over 500 with a big cam because they won't hold up
Nathan 75 yes it will
Nathan 75 u must be thinking of a 444
Add propane injection
Simple
Will this fit in my 1999 ram 1500 🤔
Straight Piped 99 easily
Have_At_IT lol
it wouldn't at all
More power isn't always better. Ive got a 600hp Cummins in a 2010 T800, and for what I do it is overkill.
Expected way more from a big rig u can get those kinda numbers out of powerstroke
Not even close to the torque #s
Yeah but your power stroke won't do it for a million plus miles.
What's Bruce's thoughts on Gale Banks?
Ah I hope good Banks is a genius
Never heard of a big sixty series I’m not kidding
Dyno a 12.7
Would 500HP make the engine less reliable or something.
The big cams were only ever built for like 450, so initially no it wouldn't but overtime it would become less reliable and more prone to breakage.
🤣🤣😅 funny
This is hp at the wheels, not the standard flywheel hp, so still gonna haul ass
Why do you down tune it?
Mileage?
I put a zero botton in mine and never looked back
Wow lol i have a #5 button in mines pulls very strong
@@athonynesbitt7956 yeah it is a strange feeling to be put back in the seat by something that big. My KW was 38,800lbs empty and was able to pull 110k lbs up the grapevine at 70mph no problem. I had my injectors set up lose and had the pump rebuilt to a Cummins 444 spec put on a huge turbo.
Hey Joseph. How much horsepower you think you got with a zero button? I just rebuilt our 444 and seems pretty under powered. Not sure what button is in it now. Egt or coolant ever get hot on ya?
@@modoherty I would say a solid 600/700 we also took the governor off. And the pyro never went above 950/1k
What i want to know is what kind of toehead does it take to say "nah i dont want 500 give me 4 and a quarter.."
1200ft/lbs?? Did I hear good?
Why didnt you stick with 500? That engine wants to eat!!!
How is your egt down around 750, and a one tone dodge 3500 egts are over a 1000? Maybe I just don’t know enough about big rig engines.
jtaylorls1 the pyro is probably in the downpipe and your dodge pyro is in the manifold making it seem like it’s running hotter
Is that a low flow?
looking at the size of the radiator hose it must be
🤮
How much hp gain would a CAC give you?
Torque is weak here.. Many stock 80's vintage mechanical engines putting out 1400 ft lbs... unmodified.
Wow my ram has 1050 tq. Crazy
Who would reduce the bhp? i want a 1000 in my car
there is a difference between a car and a truck and you're dumb
@@thermidorlevrai65😁😁😁..... True bro, its just i am a bhp freak, car or truck ain't matter
Pero por ke bota tanto humo