difference between the 1jz and the 1.5jz

[suprra_girl]

thought this would be interesting just as a comparison from the 1j to 1.5j

here's a couple of dyno sheets from the 1jz setup.. all mods the same to the 1.5j

304kw = 413rwhp
319kw = 433rwhp

cept the 1.5jz 319rwkw run had a couple of different mods... #5 piston cracked and kinda only had 100psi of pressure and the turbo had serious in and out play LOL
http://www.supra.co.nz/john/piston.jpg


1jz-gte
http://www.supra.co.nz/john/dynosheetsslips/304kwbig.jpg

1.5jz
http://www.supra.co.nz/john/dynosheetsslips/dyno1halfj.jpg

[streetknight]

what mods were done to the car? out of curiousity.

[suprra_girl]

http://supra.co.nz/johnmods.htm ;)

[suprra_girl]

i would assume that 24 leaking valves would contribute to the fact there was only minor power increase between the two engines

[Shinobu]

Are there any trade-offs when going with a 2J bottom end? Does it make the 1J any less efficient with a twin turbo setup? How does the longer stroke change the behaviour of the motor and what are the other differences besides 500cc more displacement?

Thanks..

[siman]

http://www.autosoftsys.com/supra/misctech/1JParts.html

http://1jz-gte.us/

http://www.geocities.com/jza71/

-Jonathan

[Shinobu]

I've been to two of those sites before and though they are very informative they didn't exactly answer my questions...