I talk a little bit with someone running a turbo on a h22a jdm , he explain me all his setup and everything. He told me he was using a copper headgasket wich is 1/8 inch thick, I'm asking myself if this is a good idea running the same type and thickness on my ecotec!?
My objective are making more power possible with my turbo using stock internal! except for head gasket and bolt! i want to lower down the compression with a custom laser cut 1/8 inch copper headgasket and run 14 psi! do you think this could be a good idea?! keep in mind that the engine base and head ar both flat???
http://cavalierdomination.monchar.com
i don't think any one has thought of it it may work and honestly sounds like a good idea. Also while you have the head off pollish the piston tops and give the head a clean up. "stock internaly does not mean did not use ones intelegance." good luck oh and your compression is going to be around 6.5:1 i think so plan on more boost.
6.5:1 @!#$ I will check that I have'nt think it could go down at this level....I wanted 8.5:1 but i don't think 1/8 could droppe from 10.5 to 6.5 with that
http://cavalierdomination.monchar.com
I don't have my measurements with me, but on my motor a .015" thicker headgasket dropped static compression about 3/4 of a point, so think about how much doubling the gasket would do...
You also need to realize that there are more factors determining whether or not you see detonation than your cylinder compression. For instance, a thicker headgasket widens your quench distance, which slows the flame propagation during combustion and not only creates hot spots in the chamber, but would result in a loss of power due to inefficient burning.
A few people on here have run 14psi on a stock ecotec without problems (KEEP YOUR TUNING IN CHECK), so I don't see why you would want to change anything (especially since you'd lose power from the compression drop as well).
fortune cookie say:
better a delay than a disaster.
your compression is 10:1 stock and notec good info.
2 1/2 inch full exhaust would help aswell...
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Quote:
I talk a little bit with someone running a turbo on a h22a jdm , he explain me all his setup and everything. He told me he was using a copper headgasket wich is 1/8 inch thick, I'm asking myself if this is a good idea running the same type and thickness on my ecotec!?
im assuming its the 2.2dohc vtec. so compression is in the 11:1 area. so with that thick of a headgasket on HIS motor, compression is likely in the low 9s high 8
to answer your question, there is no need to run that thick of a copper gasket. oem will work fine for a street car
http://www.myspace.com/15102113
15 with a good tune is fine... lower compression will take more pressure (all else equal to produce more power)
tuning on high compression is much more critical... but when pressure numbers go up on a low boost setup, tuning is also very critical... so do what has been tried, tested and proven...
and I believe the ecotec is 2003, 04 and 06 all have different compression... any one with the exact numbers (9.5,10,10.5 respecticely IIRC)
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