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Electronic Boost Controller Questions

Dan_AE86

By Dan_AE86,
in Engines & Forced Induction

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Dan_AE86 Explorer

Dan_AE86

Posted
Posted

Hey SAU,

im planning on next weekend getting my GReddy Profec-B Spec 2 electronic boost controller installed at Tweed Heads Autobarn. He said that he could set my high to 10psi for me(which is apparently safe, before R&R.)and my low to 5psi or 7psi (because im not taking it above 5000rpm going to and from work so 5psi is ok?)and set my gain, etc. appropriately.

Also he said he setup his mates Subaru Forester to high 12-15psi and low of 2psi!could i set mine to 2psi or is 5psi or 7psi(?)better because thats what stock is (when i say better, i mean more fuel economical).

Also he said that if i turn the controller off, the wastegate will be open so it wont make hardly any boost...is that right and safe?and do i loose when installing this, the dual stage?

Please help me understand this more before i organise this install,

Thanks,

Dan.

nuclear_skyline Mentor

nuclear_skyline

Posted
Posted

with the controller off the boost will be around 5-7psi because there is no modulation of the pressure to the actuator, simply it will be standard.

I have the same controller and it works really well... If you want fuel economy, keep the car off boost completely. That being said, you will get better economy on a lower level.

H@ME Mentor

H@ME

Posted
Posted

sounds like they know what they doing dan, however to be sure get a tuner to install it as you don't want problems further down thet track and 5psi is fine for daily driving as without the BC thats the boost the turbine will create naturally.

STATUS Grand Master

STATUS

Posted
Posted
Dan

If you get a boost controller...

please get a professional tuner to do this

and please on the dyno

it is actually better to set in on the street as many dynos have the ramp rate set wrong (ie to give nice numbers :thumbsup: ) and on the street the boost will spike etc.

Duncan Grand Master

Duncan

Posted
Posted

look I'm sure they can set it up for you (although personally I would only do it on a dyno to be safe with afrs, fuel pressure etc etc).

but when they say you can turn it off and get 5psi (ie 2psi lower than standard boost) they clearly do not know what they are talking about or what the boost controller does. No boost controller can give you lower than standard boost unless it adds air instead of bleeding it out lol

Dan_AE86 Explorer

Dan_AE86

Posted
  • Author
Posted

^^^Thats what i thought, but i just let him go! ;)

Does anyone have a good place they can recommend?im in ballina (30mins south of byron bay) willing to go to goldy/tweed.

How much do tuners charge though?

what about if i install it as per diagram, dont turn it on and take it to a tuner?how much roughly?(dont worry i wont quote yas!)

Thanks, Dan.

Duncan Grand Master

Duncan

Posted
Posted

yeah it is perfectly safe to drive with the controller turned off if you have installed it properly. First time you drive it be super careful as it comes onto boost if it goes over 7psi back off straight away - if you've got it wrong you can get eleventy billion psi which is bad.

There can be a trick with the install, you need a pressure source for the solenoid and I don't think the 33 gtst piping has one handy. You will need to weld a nipple onto the cooler pipe which might make it a workshop required job.

Dan_AE86 Explorer

Dan_AE86

Posted
  • Author
Posted

can anyone confirm that the r33 s1 doesnt have anywhere to 'tap' into for the positive pressure for the solinoid?

to remove the factory boost control is it just replace the line on the actuator with the greddy switchline from solinoid?

is there a write up anywhere on how to install on r33?

Dan.

Dan_AE86 Explorer

Dan_AE86

Posted
  • Author
Posted

i just read the install manual again and it said to take the hose off the stock wastegate actuator and put it into the NO of the solinoid (feeding it pressure) then out of the COM of the solinoid to the wastegate actuator!is that all you have to do?how does the stock one work, like would the stock one be controlling the pressure before the solinoid or what?

Can someone help me, thanks.

Dan.

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