how fast???

[nissanfanatic]

No I believe the 90 KA24E had the 9.1:1 but it also had flat-top design pistons where the KA24DE has around a 30cc dish. I'm pretty sure it would raise compression. I believe the combusion chamber on the DE is much smaller than the E. Thats what gives us a higher compression ratio.

[TatII]

yes while the design of the piston, and hte angle of the head is definitly a factor in compression ratio. the ending number will still be 9:1 or what whatever it is from the factory. the main determining factor is the height of the piston from the wrist pin up. however yes if you want to get complicated, it would technically theoretically go up in compression due to the narrow angle pent head of a DE. but why would do that? i mean its probrably not goin to raise it a big deal and its probrably still goin to be lower comp then a stock DE piston. this guy i'm almost 100% sure is full of shit.

[N-sAiN]

wow...i have come to the conclusion that the guy is bullshiting...since all of u guys here say that he has a funkyass setup...i will race him once im out there...that gay guy...well anyways, the pic in my sig is not my car...i wish it was but yeah its not...i posted up on many 240sx forums trying to finda conversion kit for the fastbacks but no luck yet...and NO that is not a photoshoped picture...its a picture i got off of a 240sx forum site...i forgot which one...its soooo nice...its some guys in japans car, of course...ever nice conversion comes from there...oohhh and thanks to all the peeps who have put up all the info

[ghostchild316]

uhh...SOHC pistons in DOHC KA would raise the compression higher than 11:1 cant remember the exact number but it's pretty damn high.