max boost on 1jz

[Kazooie]

whats max boost on stock twins

 

[1jzneil]

ive heard anything over 18 psi can break the ceramic wheels. all depends on how old and abused they are i guess. i think stock ecu will only take 14 or so. which makes anything higher than that usless from pulled timing and bad fuel mix.

 

[Spaniard]

19! I did it TUNE!

 

[slidingsidewayz]

ive heard anything over 18 psi can break the ceramic wheels. all depends on how old and abused they are i guess. i think stock ecu will only take 14 or so. which makes anything higher than that usless from pulled timing and bad fuel mix.

i planning to pick up a greddy profec b spec 2 and have boosting at 14 psi, would i need to have it tunned and have the stock injectors replaced?

fred

 

[1jzneil]

the tune isnt the problem with those turbos though. you will actually sacrifice the hot side compressor wheel with all of that pressure . ..it will break apart !but yeah the car will run great until then hehe.

 

[Kazooie]

hey

i forgot to say i have 3" trust DP and 3"exaust from DP and back if thats help

 

[csnow]

They wont run long over 16 psi according to a turbo rebuilder. In addition to the ceramic blades, the thrust bearing is to small for high boost and is prone to failure.

 

[Kazooie]

then there is just one thing left. i must put on the hks turbos i have that fit directly in stock place

 

[cbutler]

What boost pressure does the 1jz run stock?

 

[slidingsidewayz]

What boost pressure does the 1jz run stock?

mine reads 10 pounds. im guessing that the stock boost on the 1j

 

[slidingsidewayz]

the tune isnt the problem with those turbos though. you will actually sacrifice the hot side compressor wheel with all of that pressure . ..it will break apart !but yeah the car will run great until then hehe.

that's what i've been hearing, but i think its still on the safe side to be boosting 14 pounds isn't it?

 

[T701jz]

boosting 1.3bar for 8 months and no problemo.

 

[SupraRacer]

23psi before it looses efficency. but run that at your own risk as the stock 1j map sensor maxes out around 18-19psi

 

[Blksupra1jzed]

Yeah it's 10...anyone know if the stock twins on a 2j bolt right up?

 

[SupraRacer]

Yeah it's 10...anyone know if the stock twins on a 2j bolt right up?

Nope not at all

 

[Blksupra1jzed]

How hard is it to get them to fit?

 

[NecroCyde]

^custom fabrication is needed. however i think somebody on SF, perf0rmance, i believe, used the hot side from the stock ct12a's and put them together with ct12b compressor housings, shaft, wheels and bearing. apparently it worked, weather it was that simple or a highly complex rebuild process with some machining involved, i dont know, if hes on SM here, he should chime in and let us know if it worked alright or just wasnt worth it.

personally i think HKS twins are a good idea, if you can get them.