Thread: Cadillac 500 head questions

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Here is a thread that I was involved in with a lot of good ref's and replies.One thing in summary that I think I found out about the caddy engines is in stock form the valve train/heads are fine,but if you want more the after market gets expensive.Also they are not a high rev'ing engine.

Read threw the links and I think you will see what I am talking about.

http://clubhotrod.com/forums/showthread.php?t=44826

I'm currently building a 514ci for my 26T and have had excellent advice from the Cadillac forum i posted and also have had some interesting indepth technical conversations with Marty at MTS, Marty is also on the forum under the name Nashallac.

Everyone i have spoken to have said to change out the cast pistons & conrods for forged (which i have done) then i meet up with a guy called Terry on the forum that is running a near identical setup to my engine that is running consistant 9's with his 26T except he still has the cast pistons and rods !!! the rods do have ARP bolts though.

Everyone i have spoken to has said the valvetrain needs changing to a shaft system, when you look at the stock rocker setup you will see why. The engine was never designed to see many revs but can be improved on pretty easily.
I'm not so sure about that Hotrod article as i noticed a few errors when reading, one that stuck out was that they said the stock rod length was 6.370" when its actually 6.750" makes you think twice about reading it if they get something like this wrong !!!

Originally Posted by 1gary

Here is a thread that I was involved in with a lot of good ref's and replies.One thing in summary that I think I found out about the caddy engines is in stock form the valve train/heads are fine,but if you want more the after market gets expensive.Also they are not a high rev'ing engine.

Read threw the links and I think you will see what I am talking about.

http://clubhotrod.com/forums/showthread.php?t=44826