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in need of help PLEASE

chris

By chris,
in Engines & Forced Induction

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chris Apprentice

chris

Posted
Posted

Hello all, I am new to this as I have not long owned the car and appologise to those who have heard it all B4.......I own an R33 GTST, which is all but stock other than a cat back, air pod and very basic screw type boost controller (Turbosmart). I have been experiencing problems with the car sort of "surging" and "hesitating" under acceleration (running 12psi boost). With alot of trips back and forth to the workshop the problem has been narrowed down to the mechanical boost controller, which has now been removed. Apparently when running high boost these types of controllers are simply not reliable. At the moment I am running a simple restrictor giving a max of 10.5 psi boost. The car now drives nicely with smooth power delivery except for the fact that it will only boost to around 5 psi until the revs are up over 4-5000. This gives it a two-stage feel rather than an immediate burst and a flat 12psi. I don't like that kind of "step" in the boost and now find myself changing alot more gears and revving the car more, origionally you could drive the car quickly and realy not need any more than 5000 rpm. My question is.......will an electronic boost controller solve my problems (possibly with a little less boost)????? If so which one????

Any advise would be greatly appreciated B4 I go and waste $1000

Cheers

Chris

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Steve Grand Master

Steve

Posted
Posted

Stock boost control is 2 stage, second stage coming on about 5000-5500 rpm, so that is what you are experiencing.

The turbosmart bleeders are pretty popular, it is possible though at 12 psi you were spiking into boost cut which is why the surging/hesistating happened, but I am just guessing:)

EBC will give you full boost straight up. You can get a decent one second hand for about $400-$450 (something like a HKS EVC II). New are a bit more pricey. The latest Trust Profec B II is about $725 retail at the moment.

I bought my boost controller second hand, and I havent had any probs. You will also need a boost cut defender if you want much more than 12psi, but I highly recommend you dont do that with the stock cooler. Even 12 psi is a bit risky.

AeroGrace Rising Star

AeroGrace

Posted
Posted
Originally posted by Steve

Stock boost control is 2 stage, second stage coming on about 5000-5500 rpm, so that is what you are experiencing.

isn't that a 'Series-2 only' feature? I remember reading about that somewhere awhile back.....oh well...

having an EBC sure beats having to get out to adjust the bleeder everytime...:uh-huh:

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