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Boost Control Question

DuFFR32

By DuFFR32,
in Engines & Forced Induction

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DuFFR32

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Hey peeps! Just installing a Turbosmart dual stage boost controller for my R32GTST properly this time. lol

I had installed it a few months ago without the wiring hooked up (so basically it was only single stage) now ive put a switch in and connected it properly so solenoid works (now working as dual stage)

My question is about the PRESSURE SOURCE PORT, on the instructions it says the pressure source port should be located before the throttle body whereas when i bought the car a year ago the pressure source was from the manifold. Here are TURBOSMARTS instructions

I do have the option of running the pressure source just after the turbo but its blocked off.

The car does have a problem with boost spiking and im wondering if the location of the pressure source port could be the issue.

my car is running 1 bar atm but boost spikes past 1 bar then settles in second gear at WOT 3rd gear just cant get to 1 bar but maybe 0.8 bar.

car has HKS2530 with front mount and turbo back 3inch exhaust with 3 inch cat so flow shouldnt be a problem right?

Any help would be appreciated :blink:

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https://www.sau.com.au/forums/topic/302468-boost-control-question/
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Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

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Posted

no matter where you plug that boost controller, it will spike.. It's just a dual bleed valve. I've used one before and it's bad. Buy yourself a $25.00 Turbotech ball bearing valve and watch it hold a boost line than the Turbosmart dual stage.

Do yourself a favour and sell it on eBay and buy a mechanical valve and spend the change on grog :banana:

DuFFR32 Collaborator

DuFFR32

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Ok so if i got a turbotech controller would it still matter where i hook up the source port to?

Does it make a difference if its located before or after the throttle body?

Last night i made the effort to change the lines i hooked up the pressure source to just after the turbo instead of after throttle body (manifold line) will this change get a better reading? my boost guage is also hooked up to the manifold

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted
Cheers guys ive connected pressure source from about 1 foot off turbo but just wondering should i tee in the blow off valve vacuum into this line or just run blow off valve off plenum?

BOV needs to be off plenum, the vacuum from the plenum will pull up the piston when the throttle is closed

  • 2 weeks later...
DuFFR32 Collaborator

DuFFR32

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Well went for a drive to Ballina today to look at a car show, I turned the Turbosmart dual stage low setting all the way anti-clockwise. basically it should be the stock setting. car still boosts to 1bar anyway. Does this mean I have a 1bar actutator? i also noticed with the setting as it was it would take ages to build up boost after a 2nd to 3rd change! On the high boost setting i turned it out a few clicks from fully shut, dont have slow boost problem anymore when on high boost setting.

Basically should I get rid of the dual stage? I wanted to run 10 psi on the low setting for when the gf takes the car for a drive and 1bar high, but cant get lower than 1bar

BUT i did notice when at WOT in 4th gear it would only go to 0.7bar? in second it goes to 1.1bar then back to 1bar and then stays there lol

Should i piss off the dual stage and run no boost controller or just buy the turbotech and keep the car running 1bar

its soo annoying as i dont want to spend heaps on boost control yet cause i need paint fixed then coil-overs then some nice wheels and then i might leave the car alone for a month if its lucky

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