Well got my car back.

Now running 2 T28 BB but can't get boost over 11psi.

I think it maybe down to the two BOVs being set to open at 10-11?

If they came off a standard car, would they not be set to 10 if running 9 psi?

 

They are HKS but down know how to adjust?

 

Any help or advise?

 

Cheers

Well got my car back.

Now running 2 T28 BB but can't get boost over 11psi.

I think it maybe down to the two BOVs being set to open at 10-11?

If they came off a standard car, would they not be set to 10 if running 9 psi?

 

They are HKS but down know how to adjust?

 

Any help or advise?

 

Cheers

 

Hi Rossy, the adjustment on the SQVs is to adjust how much vacuum pressure is required to pull the value open, i.e how responsive they are once you close the throttle.

 

Your boost level is still set by the actuators fitted to the turbos. One way to increase boost will be to adjust / change your actuators or use a boost controller (or boost jets)

 

hope this helps m8

Simon.

Sorry my fault, I already have boost jets!

With .001 now 10psi was 13 on old tubs, with .0008 was 14/15 now still 10/11...?

 

Puzzled.

 

But thought that if say running 14 psi but the SQVs were set to 10, would they not bleed off pressure once 10 was reached?

 

I read somwhere of sombody setting them using a pressure line coz they had to be set depending on what bost you were running.

I wouldn't be running T28's with boost jets, seems like a bad idea to me.

I would be very careful as when it's working with the jets you have installed you could get dangerously high boost and damage the engine.

Get a controller then you know exactly what boost you are running and can easily adjust it. You also get a boost limiter so there's no way it can go too high.

 

You don't adjust the pressure of BOV's as Simon said, it's the actuators on the turbo's you are thinking about and they are usually a preset pressure from a spring inside them with just the amount of opening being altered with the extension of the rod.

The tension on BOV's can be adjusted but it's to stop them opening on idle under vacuum, not under boost.

 

It could be a slight boost leak somewhere causing the problem but 11psi on T28's should be pretty quick already.

Does the car seem to be going OK?

Yeh, she pulls fine the power is more progressive I'd say..

 

Beleave theres a group buy on the 200 site for boost controllers at around £260 ish dunno what they are tho...will have to invest in one. But having just shelled out £3.5k plus...well you know...wifes....say more...(Justification...err need a boost controller now) LOL

 

Plus I don't like the idea of loosing safty boost. I know some have this function but if I'm getting one I'd like to be able to fit it myself...money again! LOL

 

Not only that, I should be picking up my new V6 powered car on Saturday...Money yet again...LOLAFOC

I doubt that you have safety boost now anyway as the actuators that are fitted to the T28's are unlikely to be set to only a couple of psi.

My T28's on 2psi seem faster than stock turbo's at 9psi!

What use is safety boost if you accidentaly put 25psi into your engine? LOL

All it will do is drop back when it detonates to whatever the actuators are set to which could be anything but almost certainly won't be 7psi or whatever it is meant to be.

 

Do you know what actuators were fitted and what pressure they were set at?

 

You should be able to fit a boost controller yourself if you can connect it to 12v and earth then connect a couple of pipes. Dead easy really.

Sorted....

Speak to chris@getgreddy i think he does the profec b for around that price ish anyway

 

Kirbz