how much do head gaskets lower compression, and what is the best to buy

 

depends on what kind of gasket you buy. cometic makes good ones, but they are $$

 

i dont care how much what lowers it the most

 

depends on the thickness, google is your friend.

 

I have a inline pro head gasket coming out of my motor now....I will sell it for 100 bucks....all you will need is 2 factory honda gaskets to sandwich the plate in....it drops compression one full point

 

cometic makes a .120 gasket now which drops it almsot a full 2 points...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TegRaceR98 &raquo;</TD></TR><TR><TD CLASS="quote">how much do head gaskets lower compression, and what is the best to buy</TD></TR></TABLE>

the thicker it is the lower it will go, so there is ur answer. now how low it goes from the .XXX I don't know. but if u resurface ur head the same amt. it will even out.

 

Is this the RIGHT way to lower compression on a motor that is going turbo. Or is it considered a hack?
-PHiZ

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tchleung &raquo;</TD></TR><TR><TD CLASS="quote">cometic makes a .120 gasket now which drops it almsot a full 2 points...</TD></TR></TABLE>


like 2.0 or .2?

 

2.0

 

imo....thicker headgasket isnt the right way to lower comp.

 

.120 = 3mm it takes the compression of a gsr motor down to about 9.2:1.

And yes this really isn't the right way to lower your compression but its cheaper than pistons, machining and in some cases downtime.

The difference between a stock motor and droping the compression with a headgasket is about 50-60whp extra that you are going to gain, this is with a turbo kit and some good tuning.

If you look around here your gona see a lot of stock motor setups dynoing anywhere from 290whp to 310whp (B-series), now with a headgasket your looking at about a 350-370whp dyno chart.
With a headgasket like this your gona have some leaks here and there like coolant seepage as well as oil if not installed correctly.

 

nothing wrong with thicker headgasket. its been proven and it works.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by newgsr &raquo;</TD></TR><TR><TD CLASS="quote">.120 = 3mm it takes the compression of a gsr motor down to about 9.2:1.

And yes this really isn't the right way to lower your compression but its cheaper than pistons, machining and in some cases downtime.

The difference between a stock motor and droping the compression with a headgasket is about 50-60whp extra that you are going to gain, this is with a turbo kit and some good tuning.

If you look around here your gona see a lot of stock motor setups dynoing anywhere from 290whp to 310whp (B-series), now with a headgasket your looking at about a 350-370whp dyno chart.
With a headgasket like this your gona have some leaks here and there like coolant seepage as well as oil if not installed correctly.

</TD></TR></TABLE>


bingo.

its a cheap way to make either a lot more power that will break down in the same amount of time as without it, or a little more power and last a little longer.

 

so, best one to get?

 

ive heard good things about the inline pro headgaskets...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by newgsr &raquo;</TD></TR><TR><TD CLASS="quote">.120 = 3mm it takes the compression of a gsr motor down to about 9.2:1.</TD></TR></TABLE>

where did you get that info?

On c-speed racing and other C/R calculators it drops a GSR to 8.26:1 and a b16 to 8.21:1

 

where can i get that head gasket

 

I believe some of the sponsors here carry them.. check in the FI sponsor section or jsut do a search for Cometic .120" I remember a sponsor posting about it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boostjunkie757 &raquo;</TD></TR><TR><TD CLASS="quote">ive heard good things about the inline pro headgaskets...</TD></TR></TABLE>


they are the best like I said earlier it has been in my car for 2 years at over 1bar of boost and not one issue. it is 3mm and drops compresson 1 point.

 

yah, mine lowers compression by 1.1. stock itr internals are supposed to be strong, so im testing that theory. at 9.5:1, it could handle more than 11 psi, but i dont want to push it THAT much.

 

your HP is gettin up there for the stock ring lands but I ran 1.1bar on 114/93 mix so the gasket holds that with about 300whp

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by newgsr &raquo;</TD></TR><TR><TD CLASS="quote">
The difference between a stock motor and droping the compression with a headgasket is about 50-60whp extra that you are going to gain, this is with a turbo kit and some good tuning.

If you look around here your gona see a lot of stock motor setups dynoing anywhere from 290whp to 310whp (B-series), now with a headgasket your looking at about a 350-370whp dyno chart.
With a headgasket like this your gona have some leaks here and there like coolant seepage as well as oil if not installed correctly.</TD></TR></TABLE>

i don't see how lowering your compression that much with a thicker headgasket is gonna gain you hp. Your just gonna have to run more boost to make up for the loss in compression.

 

The Greddy gasket for the D16 lowers it .6

So for a D16Z6 it would be 8.6:1.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BoostR41 &raquo;</TD></TR><TR><TD CLASS="quote">your HP is gettin up there for the stock ring lands but I ran 1.1bar on 114/93 mix so the gasket holds that with about 300whp</TD></TR></TABLE>


my car RARELY sees full boost....even on low boost.