10psi Ok After Fmic?

[nsta]

Just quick question, wondering if its ok to up my boost to ~10psi after the following mods

3" exhaust, still need a split dump pipe

apexi pod filter

And Hybrid FMIC

currently running 7, but will have my cooler done 2morro so was wondering if i should raise it to ~10-11psi???

cheers

[Guilt-Toy]

*looks at crystal ball* mmmmmmmmmmmmmmmm 25psi! Yes you can run your generic car at 25psi with those mods with no problems.

[RBFIRE]

lol,

25 PSI No problem at all,

but problems will be in other parts, Turbo, engine, clutch, and more...

[nfi]

10psi will be fine. Some people run 12psi with no problems at all. A friend of mines old series 2 used to run 14psi with no problems at all.

It is common though for the ceramic wheel to come off the turbo above 13psi. At 10psi you would have to be unlucky.

The safest thing to do is put the car on the dyno and wind the boost up. Might cost you $60-80 but will be well worth it to have the peace of mind.

James

[R31Nismoid]

its common for the wheel to spit at anything about 10psi depending on what you do with your car.

Lots of people's have let go below 13psi

[TTT]

10psi will be fine. Some people run 12psi with no problems at all. A friend of mines old series 2 used to run 14psi with no problems at all.

It is common though for the ceramic wheel to come off the turbo above 13psi. At 10psi you would have to be unlucky.

The safest thing to do is put the car on the dyno and wind the boost up. Might cost you $60-80 but will be well worth it to have the peace of mind.

James

<{POST_SNAPBACK}>

You User id is so well suited to your response

[LANFOH]

3 words "DO A SEARCH"

[Guilt-Toy]

You User id is so well suited to your response

<{POST_SNAPBACK}>

GOLD... pwned

[TTT]

I'll put in a little more effort as I have work to do and I don't want to do it so....

considering you have said that you had 7psi before with stock setup, that you have an R33 gtst.

with the new fmic, you have better cooling for your intake air.

so yes you can turn the boost up to 10 psi.

but consider the following.

1 - your turbo's ceramic exhaust wheel may break due to the increase in 2 things... exhaust heat and turbine revolutions.

2 - you will also probably (most likely) start to get a misfire at around 5000rpm with increase in boost as the r33's do this. a simple fix is to reduce the gap of your spark plugs down to about 0.8 - 0.7mm

3 - you have a stock fuel pump - this should be upgraded immediately as a safety measure.

4 - to get the most out of your new cooling and extra boost, you might want to get some sort of ecu (like power fc) or piggy back (like SAFC) so that a tuner can make adjustments to your tuning to make sure you have a higher power output and also safer at the same time.

don't think that 10 psi is a safe limit and that your turbo will not break here.

even when stock some have been known to break.

so you increase it, you increase the risk of kablaamoo for turbo.

Having said that, a stock R33 turbo second hand is about $350

or youo can buy one of MANY garrett turbo's from like $1500 +

good luck

[benl1981]

Some stock ECUs don't mind 10psi but I think with a FMIC and exhaust your airflows will be a lot higher so you may force the ECU to run very rich and retard the timing (you will then lose power!!)

I am running 10psi but with a PowerFC, a SAFC may do the job - not as tuneable though.

I considered 10psi to be a safe level, but you never know. May last 2 weeks or 4 years. The turbos are getting older now and even R34 ones have gone pop around 12psi.

Depends how you use it. A track day will sort it out. I think I will drop boost presure to 7 or 8 psi if I hit the track.

[nsta]

cheers, ill take precautions in that case, as im not ready to replace the turbo yet:), i'll go 8psi in that case, and leave it at that for while.

[Links]

Check what it's currently running with an aftermarket boost gauge.. mine runs 0.66Bar (8psi) stock.. after putting on a bleed valve - it spikes to ~0.7ish (9/10psi)..

anyways - yeah - check what it's really doing - than decide.. also depends on how you drive.. if you constantly drive around on boost of course your going to increase the risk of something happening..

[benl1981]

At the end of the day you cant predict it really. A lot of WRXs boost there TD04s up to 17psi which also has a ceramic wheel, strange the nissan ones are so fragile.

I love the response of the factory turbo. If I replaced it I would like to drive a car with a HKS 2530 and one with a GCG high flow to compare the two.

[TTT]

wrx's having ceramic exhaust wheels is the first I've heard.

some of the models have some form of plastic or something compressor wheel but the exhaust wheel is a metal from what I've seen.