Safe Boost Level

[Jpowys]

Hi guys,

I've just bought a r33 series 2 turbo, stock apart from pod, and 3 inch exhaust (mandrel bent) turbo back and hi flow cat. I'm putting on a turbotech boost contoller. I am sure this has been asked 1000 times before, but what is a safe level of boost to run (engine has done 55000km - thought to be close to genuine).

Any help much appreciated

Cheers

Jeremy

[GTR_Legend]

have to worry about the turbo, not the engine.

Most recommend not to go over 14.5 or bang, but safe and eco should be 10-11

[Kennedy]

Depends. Daily driver with the occasional fang. 12Psi.

Tracks and WOT. 10PSi.

Make sure your fuel pump is up for it though

Cheers,

[Chris_R33GTSt]

I have the same car. Were those safe boost levels with a stock S2 intercooler?

Cheers,

Christian.

[Munna1]

Jpowys 10psi is about the max id recomend but it is debatable some have run 14psi for long periods and some have let go at 10psi or less. with a stock intercooler on a hot day you may run into problems. Have a look at the r33 tuning guide on my site it provides good info and saves you searching all over the place.

cheers

[GTR_Legend]

9 should be fine with a stock IC

[evil_weevil]

fuel pump....when would this start to not flow enough and with what mods?

and what do people replace their stock fuel pumps with?

(sorry to hi'jack thread!)

[GTR_Legend]

obviously depends on the age etc..

up to 10-11 is cool, But should be fine for up to 12-14, but would recommend replacing it anyway though!

best to be safe than sorry!

some people go for second hand gtr's, dont go for that, just get a walbro or bosch, think they go for 040 and 044, also known as bosch motorsport pump

[Kennedy]

obviously depends on the age etc..

up to 10-11 is cool, But should be fine for up to 12-14, but would recommend replacing it anyway though!

best to be safe than sorry!

some people go for second hand gtr's, dont go for that, just get a walbro or bosch, think they go for 040 and 044, also known as bosch motorsport pump

Nothing wrong with a GTR pump....Much more reliable than the Walbro's.

Evil Wvl = If the standard GTST fuel pump performed to specs then it is suitable for around 225RWKW. Unfortunately, this is hardly every the case.

[Kennedy]

fuel pump....when would this start to not flow enough and with what mods?

and what do people replace their stock fuel pumps with?

(sorry to hi'jack thread)

I've about to install a fuel pump from a 300ZX twin turbo. Suitable for up to 260RWKW.

[GTR_Legend]

Gtr pumps are fine, but would not trust a second hand one. And a new one would be more expensive than an aftermarket

[evil_weevil]

ah sweet - thanks reply guys!

i have the usual mods - 3in turbo back, fmic and turbosmart b/c so i think the fuel pump may be a safe option

cheers guys!

[Jpowys]

thanks for the replies guys. What is a upgraded fuel pump worth? Sorry GTR_legend, i was not sure what you meant by "040 and 044"... Do you mean $40 or $44 dollars? Also, once i have installed the BC and established what seems to be a safe boost level, is there anything else I need to do?

Edited August 16, 2006 by Jpowys

[evil_weevil]

yep - FMIC

[Kennedy]

Sorry GTR_legend, i was not sure what you meant by "040 and 044"... Do you mean $40 or $44 dollars?

040 and 044 are models of Bosh Fuel pumps.

once i have installed the BC and established what seems to be a safe boost level, is there anything else I need to do?

Need to do? Start saving coz once you've got the mod bug it never stops.

[eMsta]

i have read that with stock intercooler 10psi would be sufficient for daily driving - but dont take my word for it.

Im planning to put an aftermarket intercooler next year, and bumping up the turbo to 10psi - I believe any more than 10psi and the ecu will go crazy.....

[Kennedy]

I believe any more than 10psi and the ecu will go crazy.....

By go crazy you mean r&r? The ECU will only hit r&r when it detects excessive levels of knock/pinging. Some guys hit it at 9Psi. Some guys wont hit it till 13Psi. Some guys hit it earlier than others coz they use shitty fuels or have crappy injectors. So many more variables other then just simply upping the boost. The ECU does not ready how much boost you run.

[T04GTR]

to be realistic STOCK is safe

[AdamsR33]

R&R isn't caused by pinging or knocking, your motor will still ping and knock if its got normal unleaded petrol and no R&R kicks in to stop it, its caused by excessive air flow, in a series2 the max boost the stock ecu likes is 10psi, any higher and R&R kicks in, i know cause i have a S2.

When the stock ecu gets the reading from the AFM when boost is over 10psi it thinks something is wrong and starts the R&R as a safety net as not to stuff your motor. On S1's i think its about 12psi. But in saying all that i have also read that some people were able to get more from stock ecu's in S2's. I also thought the stock turbo runs out of huff past 12psi, anything over this and it just blows hot air. Plus you have to be careful that it doesn't throw the ceramic exhaust wheel out as this is the weak link in the turbo when boosted past 10-12psi.

Ohh and by the way, i don't think you did use the search button, this has been dicussed many times before.

[R33-Lovr]

this is what i think is safe you just got your car right, get use to the power it already has for a few months, you'll probably be trashing it everyday in the first 3 months, so its safe to run stock boost, (hint, with 10psi and trashing it everyday, bye bye turbo)

then get your turbotech, pur it on 10Psi you could try 12Psi on really cold nights just to c how it feels, run your 10 Psi all the time but to trash it in hot days, when you get a front mount you can trash it abit harder,

or maybe get that flick switch thing boostcontroller set it to 11Psi and stock, 11 cause you'nt be runing it all the time... get me...