Is there any way to check without removing heads & manif

[ThomaZ]

Is there any way to check the compression ratio and if I have a roller or flat tapped cam on my Chevy SB without removing heads and manifold?

 

The Chevy 350 I purchased to my 240Z came from a -70 Nova. I was built by a speed shop two years ago and pulled the Nova through the 1/8 mile strip in 7,9 sek which should equates to 348 hp. The seller admitted he was uncertain if he remembered the specifications correctly, but the engine ran nicely and the price was right.

 

After educating myself more about V8:s and comparing the engine with the sellers spec. I found out this:

 

CSB 350 bored .030 to 355cui.(3970014) Two bolt main with stock crank and rods. Engine number matches

 

TRW forged 11:1 pistons Isn’t that very high for a street engine with iron heads on pump gas?

 

Powerpack heads (3795896) Head numbers matches

 

Comp cam roller cam 221/221degres duration at .050 and .447 in lift I have searched through Comp Cams catalogue and can’t not find any cam with those figures. The engine has a standard sheet metal timing-chain cover. Shouldn’t that be a thick cast cover if it was a roller cam?

 

Edelbrock performer manifold Wrong, The manifold is a World Product Merlin Sportsman II

 

Holley 780 carb (fourport vacuum) Correct

 

GM HEI distributor Correct

 

So I am not sure what type of cam and what compression ratio I really have. The engine is ready to fit in my Z so I do not want to take it apart. Any tricks to find that out without removing the heads and manifold? Thanks in advance!

 

ThomaZ

 

http://f1.pg.photos.yahoo.com/bc/bearcatf8f2002/lst?.dir=/Datsun+240Z+-72&.src=ph&.view=

[Guest zfan]

Not that I am aware of. Just run a compression test and if your reading 165 to 185 lbs your in great shape. No real way to tell if it is roller or not with out some minor tear down.

 

Mike