jiggarex

I have been doing a search and cannot find the right answer for the question i am about to ask.
ready?????..... Here it is.
Why do people put a 3mm headgasket in their turbo setup f20 powered rear wheel drive roadster. which sometimes can be many different colors from the factory. but mine is black.
Wouldn't the stock headgasket along with the turbo kit make more power and more area under the curve at low boost. and then just have a high boost map under c16 or whatnot. So basically my question to answer all questions would be can i run like under 10 lbs on the stock headgasket, and over 10 lbs with higher octane maybe ms 109 or c16? thank you u will all be rewarded generously for answering this question> Resistance is futile.

Ty.

The reason people use a ticker headgasket is to lower the compression ratio. It just makes it a little safer to run more boost.

jiggarex

now when you say "ticker" what do you mean by that????

jiggarex

What about the question to answer all questions? im also going with the lovfab kit....

snakeeater

Because having to use race gas is a PITA for a street driven car.

AusS2000

You ain't searching too hard.

The thicker head gasket lowers the compression from 11:1 to 9.5:1.

You won't notice the lower efficiency in the low range. Your foot will just be a millimeter lower.

But at the top end, whatever you can do with the normal gasket you can do much more with the 3mm. So based on your example, whereas you would need to source C16 to run 16psi with the 3mm you don't simple as that.

Ty.

lol, sorry.. I meant thicker

ChefJ

If you can find c16 and fill your tank up with it. Lol its around 10 dollars a gallon here and I would have to drive 45 mins to get some. I am also in an Atlanta suburb. If yo uare going to drop 5000$ plus on a turbo kit and can afford 120 dollars to fill up on c16 then spend the extra 700-800 and get a 3mm gasket installed.

My tune is very conservative and I have a 3mm hg and I am still making more then 100whp and140lb/ft of torque at 4000 rpms.

jiggarex

well the c16 would be a different map as well as a 91 octane map. I was just told its better not to do so but as you guys put it maybe i will get the HG installed its not about the money... i just thought more compression and boost would be good cause it would be a plus if i got to keep that throttle responce. but i see where u are coming from AusS2000.

honda9krpm

The only thing you are trying to do with the head gasket is reducing the final EFFECTIVE compression ratio, to avoid detonation and consequently engine failure. The thicker headgasket gives you more room for error incase of overboost during malfunction.

It's funny that you guys mention petrol cost Are you aware that when the compression is reduced ie with thicker head gasket you will need more boost to produce similar power to before? Therefore you use more fuel than before. So the idea of c16 is not that bad as long as you make sure nothing malfunction