I have 2 piston options for my engine.
They are both 0.20" oversize and i can chose between the Mahle gold series 11.5:1 and the OEM honda type-s h22 11:1 compression pistons.
Now i did get my head milled and it's about 0.021" milled.
So 0.5:1 compression more.
And with the mahle's i will have about 12:1 and with oem about 11.5:1.
Which one should i chose and what's better? with my allmotor setup?

i drive stock valvetrain and intake/outtake.

 

the higher the better, but i think the juns are the way to go. Are yo ugoing to run pump gas? Everyday driver?

 

my question is about which piston i should chose in combination of the milling.
I'm driving 98 octane pumpgas. everyday yes.

 

do not mill the head. you will be just fine without doing it

 

why is everyone against milling the head? its seems like a pretty simple way to bump compression, and its not like h22 heads are rare lol got three in the basement

 

it's already done.. the milling.

It was done by my shop.. they thought it was better.
So that's why i want to know about the pistons. if the jdm oem one's are better in combination with the milling.
I think the Mahle will go hardtly..

 

how much did you mill it already
030" = 1 point in compression on the h22 heads
if your using the stock jdm pistons then you will be at 11.6:1 compression

 

0.021" or 0.55mm

I don't use the jdm pistons.. they are bad..
So that's why i'm changing.
but i already chosen the OEM type-s pistons.

 

why are jdm pistons bad? ive ran mine for over 3 years making over 240whp......

 

they are not bad.. the mine are bad.. like broken..