500 Cadillac swap

[android211]

I put a 500 Cadillac in my '87 Cutlass Supreme over 10 years ago. I can feel the potential but I lack the mechanical expertise to maximize it. I haven't given up though.
The car is definitely more powerful that other big block musclecars I have owned. When it was running right it was scary. I still recommend the swap for the knowledgeable as the torque is incredible. The 500 weighs about the same as a 307 Olds. I did lighten the front end by installing an aluminum intake and an aluminum hood. With stock 307 front springs, a spacer under them and Moog Cargo Coils in back it rides level and nice. The trans is a Turbo 400 and the rear is a posi out of a junkyard Grand National which also contributed its front sway bar. The swap kit was from now defunct Maximum Torque Specialties. Bought out by 500CID. Right now its parked due to a possible bad rod bearing but after I get another project back on the road I will return my attention to the Caddy.

 

[TURNA]

The man here you want to talk to is 500/600

 

[500/600]

Let's see some pictures of what you have. Stock other than the aluminum intake?

 

[android211]

I cut a hole in the hood to accommodate the air cleaner. I put a cowl scoop over it. The Rochester was rebuilt and recalibrated for the application. I had a set of small chamber heads with stock bathtub pistons. I had the heads hogged out to use big block Chevy valves. 2.18/1.88. I home ported them. The cam was the MTS MT10. its 219/228 with about .510" lift. The distributor was recurved. No cats. 2 1/2" headpipes. X pipe. Dynomax mufflers. It wasn;t loud except full throttle.

 

[500/600]

Assuming that the quadrajet is right, the distributor curve is reasonable, and the cam is degreed correctly, you have a great setup that should easily rev 5000rpm.

What seems to be unsatisfactory? Does the GN rear still have 3.42 gears? Stock exhaust manifolds?

Good to see another Cadillac powered car.

 

[olds307 and 403]

Yeah, if bearings are spinning that might explain some of the power lost. Have you noticed any drop in oil pressure? I ran slower at the track and saw a 5 psi drop across the board. I like anything but sbc or LS as a swap, it doesn't even have to be GM, just be unique and not a sheep. With how well the Magnum Ram EQ heads flow on my 5.9 with a better chamber, smaller ports and valves at less than half the cost of a set of Olds Procomp aluminum heads, I am tempted to put a 5.9 Magnum stroker in my 70S Cutlass or 88 Cutlass. Luckily I have 95% of the parts for a Olds 403 stroker and an Olds 350 for the 88, so I will do that instead.

 

[olds307 and 403]

What do you guys disagree with?

 

[500/600]

This is a 500 Caddy swap thread.................Dodge Magnum series? Seriously? You went way off topic

 

[TURNA]

where demz pics?!?!?!?!?!

 

[Wraith]

What do you guys disagree with?

Dare to be different only when money allows and you can afford to keep the car running.