PDA

View Full Version : head gasket/comp ratio help



93bird
11-12-2013, 07:56 PM
Ok so about a month ago I posted the specs for my new 383 nitrous motor with 11.2:1 com ratio, and most of you said it was a bit low. I was wondering if a thiner head gasket would help. T.E.A. recomended a cometic gasket bore 4.110 compressed thickness .036 I found one that is bore 4.100 compressed .027. Would this work and how much would it boost the comp ratio....

1sickta
11-12-2013, 09:31 PM
Put your specs in here and see what it comes to.

http://www.rbracing-rsr.com/compstaticcalc.html

ZOHAN
11-13-2013, 12:27 AM
And here's what I used. http://www.csgnetwork.com/compcalc.html


Making you silky smooth...

Mystery Bird
11-13-2013, 08:15 AM
I'm not a nitrous guy but what's wrong with 11.2 compression? That's about where I'm running.

firebird_1995
11-13-2013, 01:31 PM
If this isn't a max effort build, youre not leaving a whole lot on the table. If its already built just go with it.

93bird
11-13-2013, 06:17 PM
If this isn't a max effort build, youre not leaving a whole lot on the table. If its already built just go with it.

The heads are not on, and I don't have head gaskets yet. I was just wondering if the thiner gaskt would help but it will only raise it to 11.48:1

1sickta
11-13-2013, 10:06 PM
What's your quench at? You'll want to keep that tight. But no less than .035" just make sure to check PTV clearance.