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Hey.

So ive got a r33,rb25det..

Just installed bigger turbo,the closest i can compare to would be garret 3071r.

Power fc

external 38mm turbosmart ultragate

Z32 afm and 580cc injectors...

After a huge f**k around with getting it tuned,when i was assured i would have it back same day,it finally got done.

Got 326.6hp at wheels..boost is spiking at 18,and droping back to 15 by redline..

Quote for tune was $500,ended up costing $750.

Now after driving the car around for a few weeks,im noticing it kind of hesitates sometime when light on the throttle,seems to cold start fine,but then other random times it cranking over for 10sec or more and just coughing to life..hot or cold..

Also had to wind the boost down the other day as engine light had been flashing on,and was advised it was detonating..

I know the car's not perfect,but think it mite be worth my while getting the tune looked at by someone else..

Im living near newcastle..so anywhere around here or sydney..

Also any advise is also welcome

cheers

Edited by dilfukin
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What turbo precisely? It seems like there is more to the story.

I would spend more time talking to your tuner before getting too far ahead. Ask more questions about why the car seems to be pinging, why it is hard to start etc.

If you have done this then what was their response?

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yes common sense prevails here please

far too often we see people go get a tune, and any tiny isssue is a mega 6 page thread about the workshop being crap and a rip off before the guy spends 5 minutes talking to the workshop / tuner. please discuss with the workshop and let them address the issues. if you dont want to go back to them, goto another workshop for a 2nd opinion

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have a look on your powerfc at the knock/detonation. mine never goes above 20 on 98 oct but when i have only been able to get 95 oct it has gone up to 60-80ish. think the light comes on at 100 or more from memory. make sure you have low numbers

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turbo is a billet...i rang mr turbo on the goldcoast to try and track down the exact specs of the turbo,he said it would have similar spec wheels as a garrett 3071r... with .63 rear housing

I cant check knock as i dont have a hand controller for the computer,which was a problem in its self as tuner said his software wouldnt recognize my computer,saying it must be too old,so i borrowed a hand controller so he could tune it,which he did through the controller..

Boost is spiking because of crap bleed valve..two ways of fixing that is:1. another spring in the wastegate to run 18psi,or 2 get an electronic boost controller...?

Im not naming the tuner as i dont know for sure it's a tune problem....

Cheers

Edited by dilfukin
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my GTR has to be tuned with the hand controller too, trust me my tuner HATES doing it with the hand controller but the datalogit doesnt connect with all POWER FC's. mine is an older model FC i think.

nothing wrong with tuning with the hand controller its just more time consuming and more fiddly going in and out of menu's

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hand controller tuning is fine and has been the std for god knows how long?

its only in the last few years workshops have got onto datalogit as mainstream

datalogit makes it quicker and easier (less cost) and lets you be a bit more picky

but there would be hundreds of well setup quick cars with hand controller tunes

go back to the place who tuned it

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