Originally Posted by
edmel89
When I said crank up the boost I meant, increasing the whole set up, I assumed most people knew, that to run 30psi you might wanna upgrade some things, geezzz...
Not just the PSI, next time I'll be clear.
Either way, no need to delete this thread, but it is pretty pointless to point kirk out, only natural he would defend he's baby (his car) even though we werent talking about his car, just the same type of engine.
While were talking about supra's
Whats the difference between the 1jz and a 2jz?
sorry if thats a noob ???
One got vtech? LMAO JKJKJKJL 3am humor sorry
1jz is a 2.5l, 2jz is a 3.0.
They're very similar engines. The 1jz runs true twins(ct12a's), whereas the 2jz is sequential.
They both have the same 86mm bore, but the 2jz has a longer stroke. The shorter stroke of the 1jz makes it tailored for high-rpm use and really shines in a lighter car.
The fact that it's highly oversquare (Larger bore than stroke) minimizes bottom-end fatigue at high-rpm.
Matt: Due to a smaller combustion chamber, the 1jz head raises the compression I believe ~.3-4
Mostly people do a 1jz head on a 2jz block becuase they started out with a 1jz swap because it's much cheaper. When they want the extra displacement (not important, if you ask me) or in the event of an unlikely failure, they swap in the 2jz block and retain the 1jz head.
In stock form the 1jz head flows slightly better, for reasons I can't remember.