compression issue

[nelson9995]

okay guys.

im building an allmotor 82mm gsr...
I did a 1 layer (middle) HG with copper spray yesterday
Today, I find out the head was resurfaced 7 thousandths... the block was also resurfaced IDK how much.
I'm using pr3 pistons with flat valves (http://honda-tech.com/showthread.php?p=45473618#)...
I wanted around 12:4 comp. Now I think I'm at 12:8.
What do you guys think? I want it to make as much power as possible but I want it to be reliable (http://honda-tech.com/showthread.php?p=45473618#) at 93 octane since it's my DD.

With a 3 layer HG and regular valves comp should be at 11:5.

I'm scared is above and now I have to change the HG. I can always add the other layer but since I copper sprayed it I think I may have to buy a new one.

[Vteckidd]

youre right.

buy a new headgasket, its $50 to know its right. Run the 3 layer and be in the mid to upper 11s and youll be much better off than mid to upper 12s on 93 octane

[nelson9995]

youre right.

buy a new headgasket, its $50 to know its right. Run the 3 layer and be in the mid to upper 11s and youll be much better off than mid to upper 12s on 93 octane

when can I find an oem headgasket thats 82mm for a gsr? or what if I run the top and bottom layers making it a 2 that I did not use. I should be in the lower 12s correct?

[Vteckidd]

You can order one from golden eagle

I wouldnt piece one together personally

[DarKStaR]

The OEM HG is 82mm just so you know.....

[Vteckidd]

The OEM HG is 82mm just so you know.....
81mm

it might open up enough to 82mm, but i know that golden eagle has an 82mm

[DarKStaR]

I used factory one on my 82mm and had no issues, also on my 81.5mm.

[Vteckidd]

Weird .

Wonder why they sell a different one

[nelson9995]

i just did the 2 layer top and bottom with copper spray. if it blows once the car is running then ill replace it with an oem. i don't have the funds right now. but I do have a JDM h22a complete swap for sale lol

btw im like at 12:5 which tuner said is perfect

[EmminoDaGreat]

You can use factory up to 82, just make sure the hg does not hang over the bore. I have used stockers on 81.5 but I think max is 82.

[h22 jones]

its not that hard to put the head gasket on and see if it will work . Good luck man.

[nelson9995]

dang guys... i just redid this lol.well i have a brand new 81mm head gasket. but I'm not about to take it apart. for the third time lol.

according to the compression calculator I should be at 11:9 with the 2 layer (top and bottom)

add .3 for the flat valves... and .2 - .3 for the 7 thousandths off the head resurface... should put me anywhere between 12:4 to 12:6 which Morris who will be my tuner said is perfect.