I was wondering if I got heads w/ 59cc would it hurt my piston rings due to higher compression or stay with 64cc? what would be the diffrernce in hp? if any. I;m also concerned about the oil blowby, higher compression cause it to get worse? 2001 ws6, m6. also going with cam. 232/234 .595/.598 112 lsa. any help would be appreciated.

thanks
fuerzaws6

 

IMO, go for 59cc its usually the standard nowadays to get 11:1 cr. 346motors are stong and willhandle that no issues! youll also pick up 10-12rwhp.

just check PTV clearance before firing up the motor

 

I say stay with the 59's also. Get more bang out of it!

But then again what do I know? I'm just a silly body man. HAHA.

 

Depends what fuel you plan on running. 64cc for pump gas.

 

I'm on 11:1 on pump gas just fine.

 

6 tickets in 4 months!!! thats funny.


fuerzaws6

 

Really? I was told 10.5 is about the highest you would want to go on pump gas...we have 91 premium here...

 

We used 59cc heads with a H/C install and in the Hot 90* + heat on pump fuel ,92 octane, we noticed a slight but noticable spark rattle.

 

Your very close

 

we got 93 octane here.

fuerzaws6

 

If need be just mix a little 103 with you 93 octane and you should be good to go.

 

Mine are at 60cc with thicker GM MLS gaskets.

 

what do u mean by a little would 1 gallon of 103 per full tank be enough????

 

64 is better....
G0 64 to 62 CC with an .045 Gasket...(About 11 to 11.2CR)
That gives u a quench of .038 which is very good,less prone to knock.

 

gunner said i would get about 11-1 on 59cc. thats why I went with it. just curious if it cause me to rebuild my engine sooner.
thanks guys for the replies. I'm sticking w/ 11-1 cr . i decided to stick with original cam I had on mind. 231/237 .589/.595 112 lsa .

thanks again.

fuerzaws6

 

The only thing I would be concerned about is whether you have to notch your pistons. With your cam the valves may or may not clear. It's an extra $300-$400 added to your install cost to flycut. Unfortunately the only way to know for sure is when they do the install (I'm presumng you're having a shop do it).