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Crate engine- Cadillac Performance Parts

C

Cadillac Performance Pts.

Well-known member
normal_DCP_2005_Sm.jpg
 
This is our 500 hp / 600 ft lbs crate engine. It has H beam rods, forged pistons, Hastings rings, custom COMP cam (our design) , fully ported iron heads with solid bronze guides and stainless valves, clevite bearings, Cloyes true roller chain, all the billet goodies you see, custom pan, engraved fabbed valve covers, a worked 1413 competition Edelbrock carb (only edelbrock carb we'll use-webber base), fully balanced and dynoed in-house. Smooth idle @ 7-800 rpm and plenty of vaccuum for brakes and accessories! $8400. BTW, ain't a 572 crate engine been able to come close yet! That's with 3 customers in fairly large boats so far. I guess they make their power too far up the scale. Ours starts just off-idle and the torque curve looks like a flat-line in the emergency room.
 
Brother Potter, that is one great lookin engine ..... congratulations on what looks to be a sure-fire winner.
You paid attention to all right stuff in my opinion. I'm sure our other 'in house' engine builder for the carboats, Waterthunder, will agree.

That is a sweet motor.
 
Richard I wish you would ask before you start posting pictures of my motor. :D I have my prop off right now so when I start the motor with just the reduction you can hear the motor talk and it just gives me chills.
 
Results are typical, any resemblance to real world characters is strictly a coincidence. Names are changed to protect anyone that will sue me otherwise . You have heard it before, they all look alike on the inside. :D
 
YES SIR !THATS WHAT HE MEANS ! A LOT TO DO WITH SET UP ! BUT FACT ! BUT REMEMBER , THESE MOTORS MAKE IT DOWN LOW AND THREW THE RANGE ! THATS WERE NEED THEM ! THESE MOTORS ARE COMING INTO IT OWN WORLD ! HEADS WAS THE ONLY SET BACK FOR 1000 HORSERS THATS CHANGING NOW ! THANK TO RICHARD AND HIS AFFLICTION! :D
 
To my understanding the bigger cubic inches rule the torque monster so how is that a smaller cubic motor does better than a bigger one?
 
An Older chinese man goes to the Eye doctor complaining about his eye was blurry.
After an examination, the Doctor told the man the problem was he had a caterac.
The old chinese man got furious, told the doctor, YOU WONG Me no have CADERAC, me have LINCON! and What CAR GOT TO DO WIT ME EYE?
 
Hey 123, Something I noticed was the torque numbers for the 502,572/620hp, and the 572/720hp crate motors, the torque is all about the same. Did not make much sense to me. I know the Cadillac is a pleasure to run with all the manners one desires. Hey Richard help us out on this one :) .
 
The Caddy develops it's peak torque at less RPM's. I hear all the time I don't care about horsepower all I care about is torque. Well the are mathematically one and the same you derive horsepower by measuring tourque.
 
I know a guy who runs a 572 crate motor and he does not have the power my motor makes. If you look at my dyno sheets my torque curve should be called a torque flat line. The stroked 500 that Potter built for me makes an insane amount of torque the second you tyun the key.
 
Here is a Dyno sheet for a 620hp/572, Does anyone have a dyno sheet for Potters caddy?

http://popularhotrodding.com/engine...et/bigblock/0412em_12_z+big_block_engine+.jpg

GMPP'S LITTLE SECRET?
We asked the guys at GM Performance Parts why their engine that's rated to make only 620 hp and 650 lb-ft of torque could crank out 13 percent more horsepower and almost 10 percent more torque on our dyno test? Did they send us a ringer? We demanded an answer!
"The engine is under-rated because we correct the dyno measurements using the SAE (Society of Automotive Engineers) correction factor, rather than the aftermarket standard correction factor." GMPP responded. "Further, we under rate slightly to ensure that a customer can always meet our claimed power numbers if he installs one of our engines on a dyno, no matter which correction factor is used."



POWER TO SPARE
When we bolted this engine onto Westech's Superflow 901 dyno, we were expecting it to make at least as much as GMPP's claimed it would; 620hp and 650lb-ft of torque. What we were not expecting was to eclipse those figures by such a huge amount! Even after GMPP told us the reasons that its engine made so much extra power (see: "GMPP's Little Secret?"), we were still floored. Could this actually be better than its advertisements claim it is? You can bet your checkbook that it is. Because this thing cranked out so much more power, our first thought was that GMPP sent us the race motor instead. But, a quick reality check told us that if it was the race engine, there's no way it would still be running considering we were only feeding it 91-octane pump gas. So we pulled the valve covers to check for valve lash, which there was none. And a quick peek down at the lifter valley confirmed that this engine was running GMPP's hydraulic roller lifters. We guess that with so many cubic inches on tap the right combination of parts can make tons of extra power.

Dyno Results
RPM Torque Power
(Lb.-Ft.) (Hp)
3000 615 351
3200 632 385
3400 650 421
3600 657 451
3800 674 487
4000 686 522
4200 699 559
4400 707 592
4600 710 622
4800 706 645
5000 693 660
5200 683 676
5400 669 688
5600 654 698
5800 635 701
6000 604 690
MAX 711 701
AVG 670 574


SPECS
CID: 572
Bore: 4.560"
Stroke: 4.375"
Compression: 9.6:1
Block: GMPP Sportsman tall-deck Bowtie Gen VI, 10.2-inch deck
Crank: forged 4340 steel, internally balanced
Rods: 6.535-inch 4340 steel, H-beam
Pistons: 4032-T6 forged aluminum w/ floating wrist pin
Rings: Plasma-moly
Cam: hydraulic roller, 254/264 duration @ .050, .632 valve lift
Heads: GMPP aluminum rectangle port, PN12499255, 118 cc chamber, 315cc intake runners
Valves: stainless 2.25-inch intake, 1.88 stainless exhaust
Lifters: GMPP hydraulic roller
Rockers: GMPP aluminum roller 1.7:1 ratio
Manifold: GMPP single plane
Carb: 850cfm Demon double pumper
Ignition: GMPP HEI
Plugs: AC R42XLS
Fuel: 91+ octane required
Oil: 20W-50 recommended, 7-qt. system capacity
Valve covers: GMPP cast aluminum
H2O pump: GMPP aluminum
Dampener: GMPP steel
Color: What else could it be? Chevy orange
 
Don't forget to add money for headers, pulleys, alternator, belts, waterpump, starter and most of all the gearbox! That's around 3K more you need to spend!
 
So you have to look at the hp/tq to weight ratio .Bang for buck and durability. I'm interested in the ls series for the weight and was design with a 100% duty cycle in mind! If the big man can more than carry its weight and hold up witch they sound like they do .that would be a fine choice also.I'm leaning towards one of these two engine packages on the next go around. I run 383 and 400's right now they work great and love alcahol and nos. just want to try some new set ups.
 
I WAS HOPING THE BRING WHAT YOU RIDE IN ! WOULD GET STARTED LIKE RIDE BOAT RACING ! SORT AIN'T HEARD NO MORE ABOUT IT ! (THATS ABOUT THE ONLY WAY TO SETTLE THIS )! IN TWO YEARS HAVE SEEN MORE TO PROVE MY POINT ! BUT THE NUMBERS DONT MEAN MUCH IN THE BOAT DEAL ! POTTER HAS 700 HP MOTORS OUT THERE STILL RUNNING AFTER YEARS OF BANGING ! NO EXPERT HERE ! ONLY WAY TO PROVE MY POINT SEE ME SOME WHERE HOPEFULLY I PROVE MY POINT !THE MERLIN DEAL IS A GOOD DEAL ! AND I WANT SOMEONE TO POST A SET UP OF WATER BRAKES ! PLEASE ! :cry:
 
Waterthunder":2g4x9k8a said:
The Caddy develops it's peak torque at less RPM's. I hear all the time I don't care about horsepower all I care about is torque. Well the are mathematically one and the same you derive horsepower by measuring tourque.
Click to expand...
Exactly right Thunder. I'll bet not one in a hundred folks that think they understand the relationship between torque and horsepower actually do. Torque can be traded up or down for speed, but a horsepower is a horsepower is a horsepower.
 
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