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Changing Boost Help..?

Kaido_RR

By Kaido_RR,
in Engines & Forced Induction

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Steve Grand Master

Steve

Posted
Posted

bleeders work by allowing some of the boost pressure to be vented, rather than going to the wastegate. To reduce the boost, you need to lessen the amount of air being bled off.

If there are no markings on your bleeder, such as a + and - symbol to indicate which way to turn it, you can try turning the bleeder 1/2 a turn clockwise. Take the car for a drive and see which way the boost is going, then adjust apropriately.

If you do have markings, just try adjusting down by 1/2 a turn at a time, test drive, then adjust again as necessary.

May I ask why you only want to run 6psi? thats pretty low, below stock on an R32 or 33.

Another way you could get the boost down is to remove the bleeder competely, so the boost goes directly to the wastegate. This way you will just run whatever the minimum boost of the gate is.

Kaido_RR Grand Master

Kaido_RR

Posted
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Posted

at the moment my car is running very rich, and i dont have enough money to get it dyno and tune yet :) so i was advise 2 run very low boost. The bleed value has + and - but i cant turn it for some reason, it has 2 screws and i took them out but still i couldnt move it

Duncan Grand Master

Duncan

Posted
Posted

The screw you need to turn is on top of the valve, not the ones on the side that hold it together. In my turbosmart valve the screw is inside a blue metal ring on top.

I think its clockwise to reduce boost, you tighten it to reduce the amount of air it lets out.

The lowest boost you can get is stock because thats controlled by the wastegate spring instead, so just turn the valve all the way clockwise until its closed.

B-Man Grand Master

B-Man

Posted
Posted

Ummmm wouldn't turning boost down increase the richness problem ?? Turning the boost up would create more flow, more air, leaning out your richness.

But I wouldn't advise you to just turn your boost up - You really need a tuner with Dyno & Wideband Lamda probe thingy to tune it safely.

How do you know it is running rich ??

Do you have a factory ECU ?

What sort of car you got ?? I thought factory boost on a GTS-t is 7 PSI , so I don't think you will get it below that....

PTR33 Proficient

PTR33

Posted
Posted
hey,

car is 93 gts-t

stock ecu, i know it is running rich as i can smell the fuel, also i get flames out of my exhuast (i have a cat)

car is running aftermarket turbo (unsure wat it is maybe highflow, hks ssq bov, hks super drager exhuast, airfilter_cai)

Is the BOV plumb back or atmospheric venting? If you are running stock ECU and non plumb back BOV then that is the reason for your flames. AFM sees the airflow of the pssshhht and fuels to suit. Result, rich mixture, fuel smell and flames.

Not that there's anything wrong with that... :devfu:

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