Winding Up Boost On A 33 Gtst

[siksII]

SiksII, what would you say the max boost is that the stock turbo can put out without failing?

<{POST_SNAPBACK}>

i have a front mount and full exhaust, and i run no more than 10psi. u might be lucky at higher boost but i doubt it if you drive it hard.

with stock computer u will find it should run like crap at higher revs at more than 9 or 10psi so there is no point.

then again some stock ecu's seem to be ok with it. in fact i ran 14psi for 6 months (10,000kms) on my old gts-t before realising and it was ok but i would not risk it on my new one.

[cerci]

yep, mine startd running crap straight away i put in a 3inch dump and hi flow cat, hi rev range sux feels like its got no puff, that was wit no boost controler

[BookyVL]

Is there a Mines chip in the ECU?

A mate had a Mines chip and it was not speed limited also...

Went fairly well.

[Miller the hoon]

You might have a metal turbine, i do, my car was in good nik aswell so the old owner did it for longgevity in the turbo at high boost, and if the car was looked after in jap it may have been done, 14psi your plugs and coils would need more attention + have you gaped your plugs

[Links]

"SiksII, what would you say the max boost is that the stock turbo can put out without failing? "

I would suggest that you use the search function..

Your running a 12 year old car, that you from the looks of it have only just purchased. You don't know the history of this car and you think that it's mechanically sound because your an apprentice...

Unless you pull the whole engine block apart and take a look at it your never going to be sure.. most people here run about 10psi.. if you searched you'll find it eaily enough.. if you stuff your turbo, you'll have to fork out for a new turbo + possibly engine repairs..

I doubt your getting to > 180km/h - while on the dyno my car hit the 180km/h limit but didn't even feel like it was, that was in 4th..

As for fuel - everyone on here runs premium fuel that's not going to do crap to save you.. if your car is old or something isn't quite working and you modify it without the correct backups you'll run into issues..

Instead of boosting the turbo - maybe look at getting a new FMIC, an SAFC2, couple of other things, check out the car on the dyno - than wind it up.. that way you can track the A/F ratios and get a decent tune.. at the moment it'll be running very rich, with a proper tune you could prob get as much power out of the stock turbo settings than you just winding it up to 10psi..

Good luck with it..

Links

[PlasticStan]

are you really doing 180 ?

when they are imported they are fitted with an 180km speed limiter as part of compliance, this is easily bypassed and removed, so its possible that its removed, technically u shouldnt be able to top out 4th (on a manual)

which i have never tried, cause those speeds on the road are a little bit stupid u know ...

<{POST_SNAPBACK}>

It has nothing to do with compliance, the 180kph speed cut is a standard function of the ecu from the factory. It can be bypassed easily by cutting wire 53 (speed input signal) on the ecu. Also if you fit a speed convertor so the display is in mph, this will raise the limit to 180mph.

As for boost on a standard turbo, I wouldn't go past 10psi, if you go much higher a standard ecu will increase the fueling and retard the ignition meaning you will be getting less power not more. Also at higher boost you will be running the turbo out of it's efficiency range meaning inlet temps will go through the roof, and the tiny side mount intercooler will not be able to cope. The high intake temp will mean you will very likely get detonation and bye-bye piston ring lands.

Simon.