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Discussion Starter #1
Hey I was wondering if someone has alot of experiance with cadillac 472 or 500 engines. I am tossing around ideas for my next project, a 1958 cadillac coupe deville. I am looking to make it idle smooth and quiet with all modern amenities but have 1000 hp or so. I was looking at ls based motors with turbos but I would think it would be cooler if I can do it with real cadillac power.
stock block with stock crank, aftermarket rods and pistons. ported stock heads with shaft rockers. flat tappet hydralic cam. no more then 5500 to 6000 rpm power band. EFI set up.

how are the oiling systems on these motors?

 

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That would be cool as shit. I've never heard of that motor being used for what you would like to do with it. Turbo. I'd be concerned right off the bat with cylinder pressure and how well those heads will bolt up and seal that kind of pressure and keep head gaskets intact.
She's a big bitch and she looks cool. Narrowed rear, deep dish rims, big rubber. Side exit exhaust behind the front tires. LOVE IT!! :)
 

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pig hunter
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79vette. i have built many of the 500cid caddys. been as fast as 8.9 with a power adder. your will need potter's and maximum torque specialists.. talk to marty at mts and there only one guy to talk to at potter's. 1000hp with a turbo is pushing it pretty hard.
 

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Discussion Starter #9
79vette. i have built many of the 500cid caddys. been as fast as 8.9 with a power adder. your will need potter's and maximum torque specialists.. talk to marty at mts and there only one guy to talk to at potter's. 1000hp with a turbo is pushing it pretty hard.
what fails with 1000 hp turbo caddy's? I dont plan of winding this up much, only 5500 rpm or so. I figure if 500 cid caddys can do 500 hp n/a and be very streetable, why cant boosting it to 1000hp with a turbo stress it out that much more, we are talking about 15-18 lbs of boost to achive it.
 

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pig hunter
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the main webing and cap walk.. can't remember the crank number 049 or something is the crank you will need. the oiling isn't all that great either. i run hi pressure 70-80psi. 5500-6000rpms will be finewith the after market hbeam rods and good pistons...
 

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Discussion Starter #11
I figured these motors dont like rpm's, so My goal is to put a cam in it with a low power band and focus on building low end torque like a diesel. I tossed around the idea of a diesel in my caddy, but I didnt want the shake or chatter of a diesel.
 

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Discussion Starter #13
yea, since this will be an EFI set up that intake will probably be what I go for, its already has the bosses for the fuel injectors.
 

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pig hunter
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btw don't use a trans brake it will snap the crank flange at the flywheel just about everytime. that nod crank doesn't like to be shocked hard.
 

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Discussion Starter #15 (Edited)
oh dont worry about that, this is a street bruiser/ cruiser. I already have a 2000 hp 540 turbo vette to race at the track. this project is just something to surprise people at stop lights and do power tour or something.
 

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pig hunter
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cool just putting fyi out there. if you have a 2000hp vette then i would say yes it can be done. it all in the tune if it lives and you know that. i used a bbc piston .060 over give the caddy a .010 over bore.. need to cut the deck .020-.025 for 0 decking.. probe used to make rods bushed or pressed the right length for the bbc piston
 

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Discussion Starter #17
The scat h-beam rods with a forged 10-1 piston that potters offers would be fine with a stock crank? I see several cad 500's for sale on craigs list. I would probably use a set of ported stock heads, build a flex fuel engine. run e-85 when I want power but still be able to run 93 octane if there is non available. The PRO EFI computer has the ability to detect the ethanol ratio and automatically adjust timing and boost accordingly.
 
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