500 CADILLAC-DIY BASIC BOLT ONS
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- เผยแพร่เมื่อ 6 ต.ค. 2024
- FULL DYNO RESULTS-THE OTHER GUYS 500 CAD MODS. HERE IN PART 1 OF THE CADDY MODS-WE TESTED STOCK EXHAUST MANIFOLDS vs LONG TUBE HEADERS, STOCK INTAKE vs EDELBROCK PERF DUAL PLANE, STOCK CAM vs MILD PERF CAM. HOW WELL DOES THE OTHER GUY RESPOND TO SIMPLE BOLT-ON MODS? CHECK OUT THIS DYNO SESSION WITH THE CAD COMPANY!
Reading the article "Torque Pig" 23 years ago in Hot Rod Magazine showed a stock '76? 500 making 323 hp and 468 ft. ft. lbs. The '69 500 had the highest compression-10.5:1 w/ it's closed chamber heads. The '73 500 w/ open chamber heads had the best cam Cad used in the 472/500's.
I still have that magazine. They shoved that caddy in the BAD seed Chevette
@@beeterolds Ah, yes, I remember the Bad Seed Chevette! Blue? Having a subscription, the mag came a month early in June. I still have the receipt from the junkyard that I bought my 1st 500 in for $200 on 8/1/2000, an '81 Coupe that the previous owner had a '73 Eldo 500 (best cam Caddy used-longest duration) and '68 TH400 installed into. In '81 a stroked version of the Buick 3800-a 4.1, was an option and what the car came with. It also had corresponding 3.42 rear gears. The previous owner had smacked a deer and sold it to the junkyard. I changed the front header, radiator, fan and grille, and repaired the radiator core support...and drove it! I came up to a few vehicles like a 350 S-10 no problem!
I weighed the car @ 4220# on a Cat Scale. A '94-'96 Impala SS weighs within 10#, also @ just over 4210#. It is a B body. The Cad is a D body. The difference? A few inches in length for more rear leg room. Otherwise identical. So ALL Impala suspension parts interchange-including upgrades. And why my project is an '84 Coupe I went to FL to get. Plans are for a twin turbo 500 and 4L80E. The same is true for the Ford Fox body. The T-bird/Cougar is the same for it-2.4" more rear leg room than a Mustang/Capri. Over the next decade I acquired another 2 dozen more 472/500's.
@@patrickmcdonald3427 The 4.1L V6 was bored, not stroked. 3.8" vs. 3.965".
@@DeanMk1 My mistake. I thought more stroke for more torque. I didn't know that they overbored it 0.165". So there is that much material in the cylinder walls? Most blocks can't be bored that much. Cad 472/500 blocks can be bored .200" for a 4.500" piston but for performance use hard bloc the bottom half of the cylinders.
@@patrickmcdonald3427 It's usually cheaper to change bore size than to change stroke.
Changing the bore also has an larger impact on displacement, compared to changing the length of the stroke.
What usually happens with large changes in bore is that the cylinder walls are "pushed out" to some degree, but they're usually incorporated with a slightly thinner cylinder wall, too. Examples would be an AMC 401 and the 400 small block.
I didn't know the 425/472/500 block could be overbored that much. Thanks for the info.
I've got a fever and the only cure is more cowbell for the Cadillac
Blue Oyster Cult has a nice Caddy limo on the cover of On Your Feet Or On Your Knees. Keep Rockin', they are!
Yes!yes!yes! More cowbell please and thank you
Paintnamer : You have been the Harvestor of My Eyes. Its a Cult of Caddy Personality..Which is Nice...399 hp with just 4200 rpm. Even nicer. Ohio George Montgomery was right on track starting with a Caddillac engine. He added a supercharger on his 390. Cant wait for the next Caddy Shack Instalment.
You need to get the overhead shot of the Quadra jet carb, as they look awesome opening up!
good idea
500 foot pounds at 2000 and basically 400 horses at 4400.
That should motivate my little Studebaker pretty good. I can't wait to see more.....LOL
Great build series.
Did those Studebakers come with a shoehorn?? 😋 Factory v8 helps but I've seen some muy grande motors in those and they sure make for little rippers. You guys were going very fast pro-street style before many others.
@@youcanbesmartaskhow3857 Mine is a 53 truck, it's got a fair amount of room.
BTW: a 1953 Studebaker half ton short box only weighed 2850 pounds in factory trim.
@@johnparrish9215 You going to make a video of that?
@@tenorhowlermonkey3454 No, I'm to much of a hack. I wouldn't want so show people my messed up ways.
If they dino'd in Albuquerque they are also 5000 ft above sea level, so a hell of a lot more than that at sea level.
Love that you’re doing 500 Caddy, Richard. I swapped one into a ‘69 Firebird and bracket raced it. No mods except a warmed up cam. 268 adv duration. At altitude it went best of 13.2, but 60 foot was quick: 1.80 when other similar cars were barely under 2 flat. Had to shift at 4400 rpm cuz of valve float. Didn’t have the funds to improve it. Super way to go quick for cheap in a street/strip car. Looking forward to the next episode. Thanks man!
I've always wanted to do a mild build on one of these for my truck for pulling trailers. Now I can see I need to
Fantastic! I had a buddy who's Dad would swap these into '68-'72 Chevy pickups. He said he much preferred them over a big block Chevy. I went for a ride in one and it was an effortless tire smoker!
To bad they have a hardly enough oil system
I like seeing these big old engines come to life. Years ago I stuck a 72 455 olds rocket into a 80 Olds Cutlass. Stock the engine was rated at 400 horsepower and 500 foot pounds of torque. Talk about blazing tires for miles, and smiles. Then I ported and polish the heads, installed a very healthy cam, Edelbrock torquer2 intake, Holley 780 spread bore, with a nice set of headers, 2.5 in exhaust out to the bumper. Then added a 150 shot. It will blow th400 transmission apart like they were nothing. After installing 12 Bolt posi with 273 gears.
Polished combustion Chambers, to get rid of hotspots.
The car was a true daily driver. Complete with air conditioning, cruise control, and all other accessories.
It also had the widest possible wheel tire combination, that would fit under the car at stock ride height. Complete with Oldsmobile hubcaps.lol and you are absolutely right oh, the 273 gears were great on the highway. The car averaged 26 miles per gallon with the AC on. But yet they put that serious low end torque to good use.
The first to Turbo 400 I bought from very well-known performance transmission companies. What I found out was the cause of their failure, is the modified pump they used. It was designed for top end horsepower. So they did not build full pressure until around 4000 RPM. Which meant that while the engine was putting a lot of torque down in the 2,000 RPM range, the bands were slipping and causing the transmission to heat up. Third transmission I had built by a guy that had many years experience racing big block Buick engines, and knew exactly what to do. I was never a GM guy. I was just playing around with this car, while I was building my 69 Mach 1
@100,000 subscribers no comments this was in the mid-90s. And yes I do understand. The intake manifold was match ported to the heads. But was still a cast aluminum intake.
You will still get pooling of fuel in the intake at low RPMs and low temperature. And that is why you need a richer mixture on a cold start. This is all old news.
I tune fuel-injected cars today. With a good set of Deka injectors, you don't need as much enrichment at lower temperatures. Provided you're using the right spray pattern for the particular intake and intake port shape and size.
Just imagine what this 500Caddy will do! Y the time he put aluminum heads on it before boost he got 780 HP. And nobody expected that.
My guess was 302hp, 493ftlbs. But, that was based on "stock". Love this series! I'm putting a '76 500 in a 70 Nova
That's so cool!
Love the "other guy" stuff. 500ft/lb at 2000rpm stock! Dayum!
And 550ft/400hp cam,intake,headers. Low rpm will last forever. What a under utilized combo. This old dinosaurs got heeeeps left in it!
I like the straight 6 series and this 500 Cadillac. I have been a big fan of Big block Cadillacs. What you didn't mention is they make a lot of torque at low rpm. I have a 425 in my Cadillac, i have been beating on it for 10+ years. They are reliable. 348, 425, 472 and the 500. You can't go wrong with one of those.
368
Thanks Richard I had almost identical 76 500 in my 72 Commando. Really cool to see what it should make power wise. ...Mine was 76 500...216/216...458/458..112 cam...Eddy intake,,,,Carb Shop prepped 800 qjet...1 7/8" shortie Sanderson headers.
Wow! Sanderson! Man, I haven't heard that name in a while. So your headers were cast iron, right?
@@DeanMk1 No they are a shortie tube header
@@Allianceoffroad Gotcha. Thanks.
Well, it took headers, a cam, and an intake; but it finally got to the numbers I guessed. 😆
Great videos Richard! Thanks for taking us on the ride!
First time I knew you were in NorCal.
I'm up here myself.
Every time I see an old caddy in the wrecking yard I run over and hope the engine is still in it.
Man these engines are hard to find. Who's got them all ?
Oooooooh man I’ve wanted Caddy stuff to happen.... glad to hear you’re gonna go boosted 👍
Ever since I saw Car Craft do a budget build with a 500 inch junkyard Cadillac engine into an older Nova I've wanted to see it also!!! [Probably about 25 years ago lol] I wanted to see bolt ons, but honestly boost is beyond my expectations!!! More hyped than usual for this particular Other Guys' build...
@@youcanbesmartaskhow3857 I guess that article hit us both at the same time. Several years ago a came across a auto auction from a garage, mechanics lean on a 76 deville it was a beater to say the least. No one bid, I took the car for 100 bucks. I was shocked when I saw the th400 was almost as long as the car was.lol. unbelievable long tail shaft on that thing. Anyway, I scrapped the car and got $400 back when metal was high.
big Hurtt Plenty of love for those torquey engines
@@duncandmcgrath6290 yup. Just not much love for the transverse layout that many started life with.
Need to push torque curve to the right. Fascinating video
This inspires to build my 455 Olds with similar bolt ons and mild cam. Low end grunt is a beautiful thing
Make it happen,then make a video. We love this stuff
My 455 Olds (468) is at the machine shop now. I'm thinking a performer plus cam, performer intake and headers to go with the 10:1 pistons. It's going into a nice '89 Custom Cruiser wagon and will be my summer drive to work car until I retire.
@@jimmy_olds Yes,@klrdirttown
turbo8454 those edelbrock cams were pretty tame 20 years ago, find something a little more up to date.
Hopefully it’s not too late, but make sure the machine shop sets the bearing clearance on the loose side. Don’t let them machine it with typical sbc specs. Those big rods and main bearings need room to move, if they are too tight, they will clearance themselves. I had to go thru the bottom end of my first Olds a couple times before I found a machinist familiar with Olds. No oil pressure problems, and this short block has been together 18 years and still going strong.
I’m shaking I have a 1970 Deville 472 and live in Santa Fe New Mexico.. What a great day I’m gonna watch this video over and over and over
that torque curve . man from a UK perspective where we dont have big c.i. motors just insane, I guess you need it with a 3 ton barge of a car but surely itd still feel sprightly.
Denis O'brien : A bunch of hard core Brits have always done big inch Blighty Bruisers. Lagonda, the later Aston Martins, Invicta, Railton, Jensen, Bristols big block era cars before the 5.2 and 5.9's. Panther etc. Matter of fact... Bob Jankel at Panther did a 500 turbo Panther 6 in 1979, and Jansen did a bunch of SP2 7 litre Interceptors. Then Lister ( not the Red Dwarf one!) did a bunch of 6.6 litre Jag V12s. Tom Walkinshaw was reported to have a 5.6 litre stroker version of the Holden 304 inside an SD1 after he did the Group A dual throttle Body Rover 3500 Vitesse development cars. Big engines abound. And the Rolls Royce 413 6.75 in the Bentley Mulsane Turbo...and every Roller from 1972 to 1992. 6.25 lires before that as well..
I started Vocational School auto mech class about 1970 they had a 500 or a 472 Cadi in the class room dissected head and block cut into to show how a engine worked it was a new engine. I remember our teacher was a FE Ford man and swore by Texico Havoline motor oil the other teacher in the other class was a Mopar man and I was there to find how to make my Chevy faster. I have never though of that engine again until I seen your video,Thanks!
That output fits with my long-held theory that a low compression, 4-barrel stock factory engine develops peak torque of about 1 lb-ft per cubic inch on a dyno. A high compression engine generally develops up to 10% more, from what I've observed. Interesting that you easily got 10% with the mods!
I used to dream of supping up my old De vile and having a sleeper sofa... I never had the resources or skill set then, and I live to see these old girls grind out those torques. Thank sir For the other guys series , super cool
Holley cad intake?
Richard, I have a request for the "other guys"... little out of your norm. I'm thinking about my ford 6.8 v10 work truck engine. Something like that would really get it on in an old lincoln lol. Love the budget to broke (wild) builds. Really enjoy the "others guys"!
planned
I guessed 207hp 457tq,I like your videos so much that it kinda irritates me to see that people give your videos a thumbs down. Anyhow... awesome!!
Stock on the Caddy that 500 was muzzled down with all types of pollution divices and the old style catalic converter and a big muffler and a resenator through a single exhaust and 256 rear end gears and over 5000 pounds of weight to pull. But back in the 1976 road test it was the Caddy that had the quickest 0-60 pulls of all big sedans. With the Buick 455 being number 2, the 440 in the New Yorker did was the closest to the 500 on the top end charge. But these were bone stock engines when they came out , and the Caddy 500 was crowned King of performance!
I've been rebuilding a 472 with 10:1 pistons and a 288 duration cam along with the Edlebrock 2115 manifold. The engine is going into my 1972 C20 Custom Camper with a manual shifted 4L80E. Should be a blast to drive, a real sleeper.
One thing about the large chamber heads is they have a lot less valve Shrouding vs the small chamber heads I actually prefer the larger combustion chamber heads on the 500 plus lots of room for doing seat work
I can only enjoy the Techno music if there is blue oval power coming up
Basically 20-22 more hp AND torque with the long tubes vs factory manifolds. Takeaway is the exhaust manifold back pressure good for torque story = myth busted. Didn't lose any torque with the free-er flowing Edelbrock intake either, and stil a great curve.
@chris younts that is a bummer. These cars get very little aftermarket love. The 472 and 500 engines get a little lately but not so much the car. 😕
@chris younts I was considering alternatives, either what you said or straight up like demolition derby style thru the hood which no one would do lol. I'm only familiar from being a Cadillac Service Tech and seeing these oldies but goodies time to time. The day I started at the dealership I worked on a 74 Eldorado for a window motor/regulator tape and had the door panel laying on top of the eldo's sim top. Another tech came by said "get that panel off the car, you ain't at a Chevy Dealer no more''. You know, as a little jab, I was young. I wish he'd seen the real half assed shit I had to do for people without much money. He quit to be a tool man, and many of the vehicles he had serviced came back with dangerous issues, mine did not. He was a hack AND a dick!!!
@chris younts idk. For the motor bolts, Break them off and head to the hardware store. They are about quarter inch by 3 inches or so like you say, then lock washers and nuts. Same goes around where you had to cut the inner panel unless it can be riveted or use self tapping trim screws then blacken with fingernail polish. My only ideas without seeing it.
Love this "other guys" series. Very much looking forward to seeing what this motor does with a turbo on it at different boost levels.
Appreciate the guidance on these engines. Doing some restorative maintenance on my 71 right now.
I had one sitting in my 77 Chevy Monza. Ended up going BBC, but always regretted not going other guys style
n what you do witth that car??
Had a 78 Monza with a 400 in it, couldn’t imagine all the contortions it would take to get a 500 bolted in 👍
@@P71ScrewHead Still got it! photos.app.goo.gl/2T1KFMpuYtucH5HNA
@@Turbo_Todd dayum, car looks nice man, congrats..
My dad's '76 Caddy Eldorado had a 500cid, with fuel injection. Horsepower went up to 215hp
Torque was 400. The selling point was more MPGs, but, it was quite fun with the added power for the day.
Love it, have the same engine running injection. Can’t wait for the boosted part
What system?
I think you should just do a traveling dyno show. I know you know enough people. Test it all!!!
would be fun-hate to be away from my family that long though
Im fairly new to your channel. I went through a lot of your series and they are all top notch, but this one is by far my favorite. Very refreshing.
Welcome aboard!
Ive been watching these vids with my dad for the past couple of months since he has been visiting us, and we already have a turbo ls swap in the works for his 93 silverado! Good thing ive got a parts van to pull from! Love all you do homie!
Torque monsters, should have put them in trucks. My grandpa had a 76 eldorado coupe fwd. I always preferred his 71 lincoln mark iii 460bbf 385 series, 365 hp 500ft lb of torque STOCK. That's cool you're so close, I'm up here in Santa Fe lmao
That caddy 500 is a beast. Its begging for more cam, and a bump in compression. Clean up the heads, take all the imperfections out with a carbide bit. Port match intake to heads and I'd love to see the numbers after those mods, please!.
Knew a Cadillac guy back in the day that said just an intake manifold swap was worth almost 50 hp on a dyno. Can't wait to see what it is
Edit sure as heck he was right.
You know that intake they replaced the factory one with, it still looked pretty conservative I wonder if the heads could handle a medium rise intake a little more carb, and more timing?
that stock intake was practically an "updraft" rather than downdraft :) Your buddy likely searched for the 425 Caddy and plucked its single plane.
I had no idea the cad 500 had that kinda torque. Now I'm rethinking the engine swap for my towing rig.
That did wayyy better than I expected for a low compression deal!
Cool, perfect upgrade step order to see the build plan progress..
I see the same trend for the 403 t/a motor I’m doing in my garage for a ‘87 safari wagon lol gonna be mint! 👌 same 204/214 cam already in... 024 kB bored/balanced, same q-jet
Picked up a nice 3/8 long round ball burr and that’s working great along with the rest I have for the headport work.. no bigbucks for your fancy ‘out of the box’ heads.. hopefully a performer intake gets ordered soon! That and headers are the last items to get!
I hope the heads have more flow and spring and you can rev it out past 6K RPM.
i think they were keeping it under 5 because of the notoriously bad oiling system these engines have
Big engines, especially in certain blocks, aren't friendly to big revs. Caddy's have a weak lifter valley(so do Buicks). Then factor in piston speed with practically stock rods. Long stroke = faster piston speeds. Then factor in the valve springs. Besides, trying to push for high RPM's is for weaker engines that need the mechanical leverage of torque multiplication of the gearbox.
HEI runs over 600 hp so far-no issues
The only reason anyone would rev a stock 500 Caddy past 5000 RPM is to make noise. It does everything you'll ever need by 4800 RPM.
@chris younts, The Caddy valvetrain is awful. Even a modest cam upgrade is too much for the stock springs and rockers. I really like factory shaft rockers except for the Caddy.
I guessed 365 Hp and 402 Torque. Probably lot's of people closer but that's life. Thanks Richard.
I shoved one in my 81 T/A with a
368-h cam, edelbrock intake and headers...couldn't get the damn thing to not smoke the tires anywhere in first gear with 3.08 posi!...I actually put 2.41posi gears in it and it pulls like an jet airliner taking off now!...nothing like that smooth low end torque of those big 'ole Caddy motors!
I'm just wondering if Richard has heard of a "Holden" V8....maybe part of his ancestry 👍
Seems he should test one! Getting one over to him would be the tricky bit.
@@justinwright6611 th-cam.com/video/vGu55js4IEI/w-d-xo.html
It would be easier for him to do a Barra, and that's not exactly an easy thing in itself
Later Holdens had LS motors
Recalling how The Car Wizard swapped-out the factory 472 in a late-60's Deville for an R-block Olds 350 diesel that also saw all the fixes, including updated head gaskets, hydro-roller cam (stock & standard in the R-block) fuel-water separator (required if you ever run diesel) and fully studding-out the block.
This stated, and seeing how even N/A diesels can produce torque numbers comparable to a Gen-II Caddy V-8, one wonders what gains could be seen by the Oldsmobile 350 if even some the same mods seen here were applied to it? And Richard... knowing you, I'll bet you'll also want to tryout a turbo setup on it, too! ;)
I met a guy that built a very similar motor. He started with a 472. "RV" cam, headers, and Edelbrock manifold. He had in in a '70s GMC pick up truck with power everything. While turning he found some significant seat of the pants drive ability gains buy adding a carb spacer. He had started with one that was just a little less than an inch and ended up with a 2 inch spacer. Nothing was dyno tuned, all set of the pants and tracking fuel mileage on road trips. It would be interesting to see if a spacer mover some of the TQ or HP curves around in the lower band or part throttle.
we tested that
Because of the nickel content the caddy engine needs heat to run ,spacer keeps fuel cool
Enjoyed this we had one in a 75 cadillac used to kid my parents step on the quadrabog the jolly roger flag would pop out because the torque would make that old land yaught haul some... Thought a 270 280 PAW cam headers intake 850 double pumper holley and 100 shot nitrous woul d make for fun in a truck or car TH400 2400 stall 355 gears.
I guessed 375hp 525tq before I really listened to the video close, thought you where talking about your 500 with the aftermarket intake. starting to be really impressed with the Caddy!
Not bad--the 1970 500 cid made 400 hp with high compression. Back in the days of Sunoco 94, when you wanted a cheap gas engine that could yank a boat trailer uphill or an RV (diesels were still expensive, tho Gale Banks was beginning to make turbo power), and the Chevy 454 done .06 over to breathe, wasn't enough displacement and buying an aftermarket crank to fit into a 427 tall deck you plucked out of a dump truck was too expensive...a low compression Caddy was the secret.
Pull a single plane intake off a 425 Caddy, tune the HEI, get a kit to convert Chevy Big Block headers to fit, and you had the displacement to run AC and haul ass under full load. But today, you go to the junkyard and snap up an 8100 (only one company has the heads, why isn't Edelbrock all over this?) or hit the swap meets for a 502 rat...
Those torque numbers are very nice well done! I cant wait to see boost run through her and finding the limits
Of the motor!
Awesome job Richard! I can't wait to see some boost! 👍
I drill and tap oil pump pipe plug 3/8-24 and taper the hex area to seal with an oring. Use Teflon sealer on pipe plug.. I use a 3/8-24 nut with a taper to seal against the oring. Turn to set oil pressure desired.
That’s awesome. I first read about these when hot rod or car craft stuffed one into a chevette when I was a teen.
Steve Magnantes "Bad seed" circa 2000.
I still have the aricle on nightstand
Very cool I love old caddy motors
This is like an old (20yrs) Hot Rod article where they did a junkyard Pontiac 400, there was like 10 stages of add ons, with a rebuild in there after too many trips to the upper rpms.
I have a SBC and don't want to go LS but want boost. I think it would be a good show idea to test the Banks cast iron turbo manifolds feeding a Edelbrock ProFlo front feed EFI intake since there aren't a lot of quality off the shelf solutions. I have a first gen Monte Carlo so have space for days, just want to keep the factory hood.
This is awesome I literally just bought a 500 caddy on the 10th
Great testing Richard, you know stopping at 5,500rpm sounds so odd on a dyno session. Keep testing.
I was close I guessed 380 525. Can't wait for BOOST !!!!
This interests me. I have a '76 500 in my Ratrod. Bone stock and blisters 40" Super Swampers on pavement with no problem.
Not sure where I'm going to find room for those headers.. middle of the wheel exit? lol. I'd be curious what (if there is such a thing) a shorty-mid length would give up to the "ain't gonna fit" pipes here. The dual plane mamby cam was my favorite, thanks for taking the time to do all this!
i must be delirious from the corona virus because i'm starting to dig the techno music.
I like how you are masked up at the beginning and not in the middle of the video! Hehe
Wow the torque is incredible just in stock form
Cool vid! Richard you are literally the James Brown of TH-cam engine tech. Ain’t nobody work harder than you
Not even the Micky-D’s your colleagues eat at in Albuquerque can compete 🤭😂
This is bad ass i so hoped you would do a 500 or even a 472 caddy engine with all the new stuff for them.
Richard, thanks for doing these videos. I definitely like the "edited" version better!
Yes!!! Thank you. I have a 519 in my 70 deville
I haven't been interested at all with Ls stuff because im bored of it, this on the other hand is awesome!!
Richard you got one of the best job in the world Js. I hope to see you test and modify the 7.3 Godzilla in the future. Would be interesting to see some different cams tryed out, my gutted foxbody needs a engine lol. The 7.3 has got a lot of good things going for it and its a grand less than a coyote. Chevy guy's are really going to hate on Fords more than they already did.
Brian and Evan are doing a good job over with the one Brian has
Future for my 75 El Dorado Convertible💡
I REALLY want one of those in my 78 Chevy C20. They getting hard to find now. damn airboats...lol
I don't care if its the fastest or most efficient. I want a damn stump puller. When people ask what's in it, it'd be cool as hell to tell people its a Cadillac 500. That number just feels good to say.
WOW, AWESOME, THANK YOU FOR SHARING.
The reason this stocker made 312HP rather than the rated 290 SAE Net HP was the Cad Company upgraded rockers/springs. The stock valvetrain floated valves at about 3900RPM (depending on miles). The oiling system, bottom end and heads were underutilized due to the flappy rockers/springs.
Cad 500s are a special motor with some great engineering in them. High nodular blocks, super thick in the right places, excellent flowing factory irons , etc made them great candidates for upgrades. Plus the motor is "small" for it's massive displacement. It fits big power in tight spaces.
the 1975 motor wasn't rated at 290 hp (100 hp less)
Love all the hard work and dedication you put into your work brother. Cant wait to see what that big 500 can do. Are you keeping the bore and stroke the same?
turns out this test motor was .60 -over-I did not know til we took it apart (mine is staying stock displacement)
Love the big block caddy research....maybe these guys got some 8.1 vortec tricks 😁
you mean the 8.1Vortec used Caddy tricks, and one of them was to increase the stroke. Remember the Caddy 8.1 was here first and came out back in 1970. This is all about maximising on the Caddy weekest links to reach its potential.
On the trip did you play Weard Al Yankovitch "Albuquerque"!
I remember an old article where someone dyno tested a 1970 high compression 500 Caddy engine and it made a little over 350 HP bone stock. I can't remember the torque number but it was well over 500. These are great engines but if you're going to warm it up much it's best to just yank the heads and have them machined for more lift/springs and install the big valves. The factory rockers are barely good enough for stock so they should be the first thing to go.
400 hp & 550 torque would work great in my pulling work pickup truck.
Thanks Richard Holdener
Sounded like it was barely off of tickover when he was revving it.. During that first run was that engine running a little rich going by the black smoke that seemed to come from the exhaust?
Love that engine. Can’t wait to see the next video
Dominator carb, heads, and a cam with duration in the 240 range should get to 500hp N/A, and 1000 with 15psi of boost.
Love that idea!!!
With stock rods???
@@pjmccoy4216 not if you like keeping them attached to the crank!!
you can go to 500hp on the quadrajet aswell
@@pjmccoy4216 As long as timing is conservative, yes.
I remember having my great grandmother's 75 sedan deville dyno'd after a stock restore. It's says that engine only put out like 200 hp on everything I can find. Well, everything except that dyno. Which said 305whp. I'm afraid to do anything but stock on that old classic car. Maybe I'll put one in a big ol truck one day and see what she can do.
305 whp in a 75 cad?
@@richardholdener1727 I did polish some of the internals but was afraid to do anything more because I was only 16. I'm trying to remember if it had the qjet or the holley for that test. I think I put the holley on with a small spacer. It's been sitting in storage for another 15 years and likely needs redone to get it back on the dyno to confirm.
Hey I have an Idea!! How about testing A rev kit for a Hydraulic roller lifters to see how they change horsepower and torque!!!! See if they work!
Ooh, a Caddy 500! Neato. 😎
You live in the Vacaville area? I'm over in Santa Rosa; stay safe from all these fires, man!
Just looking at those shaft mounted rockers...and having weird fantasies of a Half-Caddy V4.
Cant wait to see how it compares too 8.1L . Same size but 30 years apart.
Boat anchor is all the 500 engine was, has and will always be.
you spelled torque monster wrong
I love your videos. I wish I was close to people that were willing to work and had skills so I could build a 383 stroker with TPI and vortec heads for my 92 GMC sierra. I also want to freshen up an lx5.0 I have with all the explorer and cobra parts I have hoarded plus rod and crank stroker kit
Sounds good but I'd take the Caddy any day, and get better gas mileage while doing it
I think I guessed 305 hp, 510lb. Putting a 472 in my 73 vega. I think it'll move it along just fine.
I frequently see these big-inch GM non-Chevy motors spin rod bearings. Is caused by oiling issues? Big end crush diameter? Rod bore honing finish (surface roughness)? A reliable solution to this would make these "other guys" a lot more popular.
they spin them on nitrous with too much rpm (the cure is to replace the driver)
I'm impressed on how quickly the big 500 rips through the rpm range. I know that the engine is 500 cubes but the numbers it puts out with those easy mods is impressive. I'd guess with boost the ol 500 could push 1,000 horses ??
The dyno controls the rpm gain.
No matter how much horsepower it makes.
@@RandomLifeTimothy Thank you, I just wasn't sure if the engine could make a difference. It starts off with a bunch of torque at a low rpm. Thanks again.
I can't wait for the boost part!
I guessed 390hp 550lbft for stock lol... It needed headers, intake and mild cam to get to my guess lol.
I hate to take this "off-topic," but would it be possible to see more of the Caddy with the wheelie bars?
I'll shoot some engine shots
about time i saw a BOC gm big v8 on this channel....yessssss!!
I have questions regarding turbo engines. I would like to know if adding a tiny turbo to a big engine would effectively reduce volumetric efficiency anf help with fuel economy. I like the big torque from a long stroke engine, but I am wondering if it could be detuned by using a small turbo for when there's no need for it, by choking it with exhaust pressure, and still have a big engine for when there's a need for. I have weird ideas.
you don't choke it with exhaust pressure under cruise (which would be bad), and you don't reduce VE to help with MPG
That chinging sound in the rave music is driving me nuts