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Increasing Boost

airbox

By airbox,
in Four Door Family & Wagoneers

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airbox Contributor

airbox

Posted
Posted

i have been thinking about giving the car a mild boost by bypassing the solenoid with an adjustable bleed valve or the other option is to try and drill out the solenoid by 1mm or so to increase the bleed off slightly. Has anyone tried this way? Seems a simple cheap way of increasing boost to me.

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https://www.sau.com.au/forums/topic/353039-increasing-boost/
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StealthX Veteran

StealthX

Posted
Posted

Do a search. Theres a huuuge thread on how to get high boost mode on the standard solenoid. Remember the highest you can go on the stock turbo is about 12psi. Higher than that and you'll seriously shorten the life of your turbo.

airbox Contributor

airbox

Posted
  • Author
Posted

cheers, have already done the earthing mod about a year ago. Am hitting about 7psi now and that is with a supposed r33gtst actuator that I got off a spare turbo I bought.. I know the gtst actuator is meant to be higher spring rate to achieve more boost but I can't see it made any difference to the standard stagea one. I tried to just join the hoses that go to the solenoid together but that gave me big spiky boost so I reckon that if I restrict the airflow to just above what flows through the solenoid then I should get a bit more boost. If I had a proper 10psi actuator then I wouldn't need the solenoid at all as there would be no need to bleed any air off.

QWK32 Veteran

QWK32

Posted
Posted

R33 actuators don't run more than a stagea one, they are still a 5psi actuator with the solenoid bleeding it of to 7psi.

Cheap options are to get a manual boost tee, the turbotech ones are highly recommended. Or get a R32 GTST actuator as Tom said, they are 10psi.

66yostagea Grand Master

66yostagea

Posted
Posted

I used to run the earth system, hooked up with a switch so I could run either or. After fitting the front plenum I went manual, set at 10psi. The increase in power was quite remarkable.

Sunkist Grand Master

Sunkist

Posted
Posted

$30 turbotech boost T vs frigging around?!?!

Boost T pretty clearly the winner.

+1.

why dont you modify the actuator. weld a spring onto it!

we did this to a 8psi actuator as we could get a replacement actuator.

runs a clean 20psi flat line! - takes abit to get it right though!

QWK32 Veteran

QWK32

Posted
Posted

welding a spring onto the actuator is just a little bit too backyard for most people, that on top of unpredictable results, fragile stock turbo, and the option of a $30 manual boost tee that comes highly recommended, why would you risk it.

chuckie Mentor

chuckie

Posted
Posted

lots of cowboys about these days :stupid: ,

but each to there own :whistling: ,

most guys do it as it should be done :thumbsup: ,

i guess then they will start saying FUEL use is up only get 250/300 a tank :unsure::wacko: lol

airbox Contributor

airbox

Posted
  • Author
Posted

cheers, I think I will look for an r32 actuator and do away with the solenoid. In the meantime I think I will just bypass the solenoid with one of these.

http://cgi.ebay.co.uk/Brass-lockable-2-port-bleed-valve-Boost-Control-/270583539142?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3f000925c6

and start off with it virually closed until I get to about 9 or 10psi. Seems easier than the turbotech and no replacing the Tee either.

What I am going to do with the solenoid signal is just for a bit of bling. Solenoid signal to a relay, relay turning on and off one of these.

http://cgi.ebay.co.uk/Universal-12-Volt-Windscreen-Washer-Pump-Water-Bottle-/270509676174?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3efba2168e

and running to a atomiser jet ( spray can nozzle ) firing up into the r34gtt intercooler That I have fitted. Just need to find a space for the bottle. Should only come on when the high boost mode would be on!!

wolverine Grand Master

wolverine

Posted
Posted
Seems easier than the turbotech

How is doing all that easier than fitting a $30 part to a couple of hoses?

The turbotech is not technically a bleed valve, it will only send air to the actuator at your selected target boost.

I don't trust them on higher boost applications but for a stocker they are definitely the biz.

Sunkist Grand Master

Sunkist

Posted
Posted

+1.

why dont you modify the actuator. weld a spring onto it!

we did this to a 8psi actuator as we could get a replacement actuator.

runs a clean 20psi flat line! - takes abit to get it right though!

i think people missed this.

you will be changing between springs to get your desired boost.

also running your desired boost and not having a boost controller for a cop to see is the benefit..

everyone to their own.

I do also agree

$30 for a turbotech manual boost controller and a slice in the vacuum line is the easiest simplest option!!

I had one of these! works much better than the other products out there.

airbox Contributor

airbox

Posted
  • Author
Posted

it's easier I reckon cos I would just replace the solenoid with the bleed valve, nothing else. start off with it closed for 5psi and crack it open a bit at a time until I get about 9psi. The turbotech one is more expensive and you are also changing the Tee piece and if as you say it works like a ball and spring type one, then the operation is different to standard where air is bled away to keep the pressure at the actuator down. I'll let you know how I get on!!

jrm Veteran

jrm

Posted
Posted

cheers, I think I will look for an r32 actuator and do away with the solenoid. In the meantime I think I will just bypass the solenoid with one of these.

http://cgi.ebay.co.uk/Brass-lockable-2-port-bleed-valve-Boost-Control-/270583539142?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3f000925c6

and start off with it virually closed until I get to about 9 or 10psi. Seems easier than the turbotech and no replacing the Tee either.

What I am going to do with the solenoid signal is just for a bit of bling. Solenoid signal to a relay, relay turning on and off one of these.

http://cgi.ebay.co.uk/Universal-12-Volt-Windscreen-Washer-Pump-Water-Bottle-/270509676174?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3efba2168e

and running to a atomiser jet ( spray can nozzle ) firing up into the r34gtt intercooler That I have fitted. Just need to find a space for the bottle. Should only come on when the high boost mode would be on!!

I fitted an r32 actuator to my car - really straight forward swap, and much more consistent boost than any bleed valve can achieve. Highly recommend it. Just make sure you unplug the factory bleed if you do (or it will spike to 14+ psi..)

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