Factory electronic boost control on GTST

[snake]

Noticed that my series 2 R33 GTST has a form of electronic boost control that runs from the factory ecu. I plan to fit a Apexi PFC and its boost controller. However will the Apexi PFC alone run the standard factory boost controller to a higher setting or is it necessary to remove the factory boost controller and replace with the Apexi equivalent.

[Steve]

Power FC only works with the power fc boost control, basically it is the same solenoid as the AVCR.

You can fit any other type of boost control you like, but the power fc wont drive it, ie be able to change boost settings.

[steven]

Hay mate, does the series 2 R33 GTST came with the factory electronic boost control ? Becsaue i don't have one, or even a boost controller.

Cheers

steven

[Steve]

I dont think either series 1 or 2 have electronic boost control.

What sort of boost are you getting? The factory boost controller doesnt go alot further, with 5psi to 5000rpm and 7psi to redline, or with a cat back 7 and 9 psi.

[snake]

Apparently, so i have read, it controls the rate that boost climbs and the amount of boost in each gear so as to give a more linear power delivery, very common on Audis. Audi uses them to adjust boost pressure with climate to give a more constant power delivery for each drive. Ya know how colder weather helps turbo cars to make better hp...the audi drops boost when this happens to keep power constant.

[snake]

It is located on the passenger side strut tower, looks like a small solenoid with three vacium/pressure lines running to/from it. One is from the wastegate itself, one from the alloy elbow that goes over your rocker cover(s) that would read pressure and one that bleeds air back into the intake of your turbo. Can you see how it works? Some of the boost from inlet is bled back into duct just before turbo before the remainig boost is used to push wastegate cannister open and hence control boost. I have heard that this common only to series 2.

[hooligan]

so your saying, if i had a pfc and profec e01.. i cant change boost by the e01?

[Steve]

hooligan, my earlier response was poorly worded,

the power fc will only control boost with the power fc EBC solenoid, or AVCR solenoid which is the same.

You can run any type of boost control with the power fc.

[turbomad]

snake all R33's have that solenoid and it doesn't control boost like an EBC, it just opens at around 4800-5000 rpm and bleeds a little air off to increase boost by 2psi as steve said. If you watch your boost gauge you'll see what we mean. To fit an EBC simply remove the solenoid first.

[snake]

i see, it stages the boost through the rev band...dont have a boost gauge yet thats why i assumed it was for different purpose. So unless you plan to keep standard boost it is virtually useless because of its limitatin to only lift boost by 2psi.

[steven]

To: Steve dude

I don't have a boost controller, therefore i'm not sure what sort of the boost i'm getting. But when i in the full acceleration, it will goes up to + 3.5. So how much psi am i running?

And may i ask if i don't have a boost controller, can i set up the boost? Lets say, run it to+7 !

Cheers mate

steven

[Steve]

Your guage reads in x100mmHg, about 3.5 is about 7psi. +7 is acutally around 14psi, which is well beyond the safety of the stock turbo - you may get away with it for a while if you have a FMIC and decent exhaust, but it wont last.

You +3.5 indicates to me that you dont have an aftermarket exhaust? Or if you do, its not flowing very well - best sort that out before you start tweaking boost, remeber the exhaust gasses have to go somewhere, or they decrease engine efficiency, so you should try and get your exhaust flowing as well as possible. As an added bonus, you will get more boost with a free flowing exhaust.

The stock boost guages are not in my opinion to be trusted anyhow, as they are not calibrated well enough to read accurately,and have few pressure scale markings.

to increase boost you will need either a bleeder which is quite cheap, or an EBC which isnt so cheap.

[Steve]

Oh, and a stock turbo will not like being at +7 for very long, they have a habbit of spitting the turbine wheel out the exhaust.

Best sort the rest of the setup first, then buy a nice HKS, Trust or Apexi turbo and wind in 15-17lbs no probs:)

[steven]

but when i bought the car, the owner show me the receipt about the aftermarket exhaust. It said for front mufflers is $95, and the 180 Muffler is $240.(Not sure what is it mean) Therefore i think i got the turbo cat exhaust or aftermarket exhaust. Becasue when i looked at the back of the exhaust, it looks quite big, its bigger than the coke can a lots. Can u tell me how can i see/ where i can see, i had whether an aftermarket exhaust or not please?

Cheers mate

steven

[Steve]

Have a look under the car, if the pipes are around 3 inches or 80mm+ it is probably ok. Best way is to buy a cat back system, just buying mufflers will help a bit, but only if its a decent one = there is alot of crap out there.

And if he paid $95 for the front muffler, it could be something like a turbo muffler which are crap and just give the exhaust a nice note.