dren70

putting P&P stockers back on and would like to raise the compression a tiny bit. what gaskets should i get? if anyone has a link to there thickness it would be great. thanks in advance.

Zack

if you want to raise the compression, use Impy SS gaskets

RedHottG2

I was just gonna say exactly what Zack said. Impalla SS gaskets are thr right choice for what your looking for.

sideways_Into_3rd

impy SS gaskets

i ran them on a stock motor making close to 12:1 c/r with 150 shot of nitrous and they held up just fine

CoUnTryMuZiCZ28

What about if you went to GM couldnt you get Impala SS heads gaskets? Would they be the same thinkiness as impy? (whatever that is)

Red_94Formula

ya the impy is an impalla ss for short. you can use the GM gasket made for the impy with no problem. the stock gasket is 39 when the impy's is 29. it will increase compression from 10-4 to 10-5 only. not much but why not do it with the heads off

dren70

thanks for the impalla ss tip. how about going with a copper gasket?? would that be thinner and give me another tenth on the static cr? i am guessing this is one place NOT to use something from a tube??

Josh-'04 GTO

It's actually .3 compression ratio points (vs. the Felpros, .6 vs stock). Well worth it if you've already got the top end apart.

http://www.smokemup.com/auto_math/compression_ratio.php

marshall93z

what year impala gaskets would you ask for

Zack

1994-1996

9T4LT1

Aren't the Impalla heads cast iron? And if so how do the Impalla gaskets hold up to the different metal expansion rates of Aluminum on one side of the gasket and cast iron on the other. Wouldn't the different expansion rates of aluminum and iron cause unwanted friction of the gaskets.

Just wondering.

95RagtopTA

I'm also in the middle of preparing for a head/cam swap. I was originally planning on Impy gaskets, but after reading several posts discussing the above concern I'm leaning toward Felpro.

Is the benefit of incr. compression from Impy gaskets on a NA 380rwhp car worth the above risk (if there is one)???

SVT Killer LV

FWIW...

Stock Compressed thickness = .049"
Felpro 1074's Compressed thickness = .039"
B-Body Compressed thickness = .029"

SVT Killer LV

why don't you mill the heads down?

Mikey 97Z M6

I've ran the Impalla SS h/g on my car for the last 4 years as a daily driver. I've put over 60k miles with them with that hp level. Lot's of people run them on daily driven heads/cam cars without problems.

So to answer your question, yes it is worth it IMHO.

Mike