ct12a question

[uberness408]

how much boost does the twin turbos spool up stock

 

[OneJArpus]

search.

 

[Evilempire1.3JZ-GTE]

~10 psi

 

[OneJoeZee]

ya 9-10 is normal stock boost. full exhaust can bring that up to 13-15 ish.

 

[MDCmotorsports]

IIRC 12A's have ceramic wheels in them. Any thing over 14psi goes kaboom.

 

[suprastanger507mgte]

IIRC 12A's have ceramic wheels in them. Any thing over 14psi goes kaboom.

I think we should clarify that....it will go Kaboom after repeated high boost levels and a beating down on it over and over...

A lot of people have the perception that as soon as you go over 14 psi..the turbo will blow.. lol. ( Im not talking about you MDC, just the newbies..)

 

[OneJoeZee]

They will eventually die anyway. People have ran 18+psi on them for extended periods with no issues and others have had them die in a short time at stock boost...

for example, the turbos i'm using now have seen over 20psi. they are still ok. The turbos that came on this engine I'm using now were blown already and it was stock...

 

[honestabe]

From what I've heard and read, the stock twin's are only good up to about 350 rwhp. After that the turbine wheels crack from the heat. A good remedy for this is to upgrade to steel turbine wheels.

Adam

 

[MDCmotorsports]

From what I've heard and read, the stock twin's are only good up to about 350 rwhp. After that the compressor wheels crack from the heat. A good remedy for this is to upgrade to steel compressor wheels.

Adam

Steel turbine wheels good sir, not compressor wheels.

 

[RHDMK3]

Mine boost at about 11 psi stock.

 

[Evilempire1.3JZ-GTE]

no steel wheels lag you might as well go get a single and upgrade it.

 

[honestabe]

My mistake

Adam

 

[OneJoeZee]

no steel wheels lag you might as well go get a single and upgrade it.

Have you experienced a 1J with steel turbine blades to know if the lag increase is significant to make them worth it or not? My guess is no.

 

[suprastanger507mgte]

no steel wheels lag you might as well go get a single and upgrade it.

huh??? Where you guys getting all your information from ...seriously...you and VJ comes up with the weirdest shit..

 

[annoyingrob]

From what I've heard and read, the stock twin's are only good up to about 350 rwhp. After that the turbine wheels crack from the heat. A good remedy for this is to upgrade to steel turbine wheels.

Adam

With a more open y-pipe, and bigger cams, you may find otherwise

There's a guy on SF running 370hp, and over 400ft/lb of torque on stock twins with what I rmember being not much more then a set of cams.

I will agree with you, heat kills these things. You want to get rid of heat, you get a more free flowing exhaust to dissapate, the heat, and larger cams, allowing the engine to consume the same amount of air at a lower pressure ratio, allowing the turbos to operate in a more efficient range.