im going to run a electronic boost controller on my car, wanted to find out how much more boost you can run with them over the stock wastgate spring, is there a limit or could you have a 7psi spring and run 28psi using the ebc?

thanks

 

You can set the boost controller to run whatever you want as long as the controller itself will do it.
Whether thats good for your car or not is a different question.

 

as above depends on the unit, ive got a blitz duel sbc spec r and 32psi is its limit

 

thanks, can you run less than spring pressure too?

 

No, your car will run the min amount of boost that your actuator is set to mate.
Even turning the boost controller off will just let your car run as if it wasnt fitted, but wont run any less.

 

A basic controller will only adjust the boost set on the actuator, so mines 30 psi at 100% and i can adjust from 0-100%

 

IMO it's best not to work the EBC too much, they need some room (duty) to help maintain boost levels.
i have an 8psi spring fitted to my setup and will comfortably hold 16psi all the way to the limiter, when i turned it up to full it hit 22psi and backed off to 17.8psi.
when i put my other spring back in to hold 15psi, it should hold 2BAR with enough spare duty to help with top end.

 

It all depends on the back pressure in the turbine housing.

Rick

 

cheers guys, im on an external turbosmart wastegate with 14.5psi setup in there at the moment but quite fancied the ability to run lower than that for wet weather and the mrs,

now need to get one, what do people use or recommend? i have looked at the turbosmart stuff liked the e-boost 2 with gear dependant boost but when ive looked at it its on switches not by rpm and speed which i think is abit pants

 

There is no generic answer as every setup is different. Trying to achieve 28psi with a 7psi spring is pushing extremes, but it may be possible.
And certainly the E-Boost 2 is a fantastic boost controller. If any can do it properly, it will.

But no, you cannot run lower than w/g spring, unless you use a controller that operated off CO2 or compressed air which could blow the w/g open. Not exactly practical for a road car.

E-Boost 2 does claim boost per gear....Ive yet to figure out how as it has no way of knowing what gear you are in. They also didnt reply when I queried them. Closest I could see is some sort of time delay boost increase.

If your ecu can control boost, any decent ecu will be able to do boost per gear or speed or other setups.

 

Steve, I think Eboost2 needs switches in the gate to tell it to switch settings - a bit cumbersome really.

Rick

 

I think it requires a microswitch. But it assumes a count up only. Maybe useful on a sequential box or something ?

It has no ability that I can see to know what gear you are in for proper boost per gear. That aside, it is an excellent unit and does hold rock steady boost.

 

Micro switches I think is only way or time delay which is ok for drag use I presume,

Im using a h pattern box so would be a ball ache to sort,

I run omex 600 might give them a call and see what my ecu supports

 

i'm sure there are boost controllers that use rpm and speed inputs to determine boost levels as desired.
i think one is a apexi one, can't mind which though.

 

yeah think your right,

is there actually much difference between running a normal adjustable turbosmart manual adjuster to an electronic version?

i know you can adjust sensatiivity on the ebc but in real life is there much difference

 

There are various levels of EBC.

Some are just an electrically controlled bleed valve.

Some are as above, but with a few extra features, maybe 2-3 settings.

Some will then allow you to block the signal to the w/g to assist spool

Some run in full closed loop and will try to maintain your boost target at all times. E-Boost 2 is most definitely in this category. It holds rock steady boost when some might fall off etc at the top end, or have boost spikes.

So yes there are huge differences and many options.

But a good ecu should be able to do those things too. The best thing about an EBC is it is fully adjustable at any time from the cabin. The ecu is not.
Of course, that adjustability can be a very bad thing in the wrong hands too. Plus a separate EBC can be expensive

 

Inbuilt EBC on a stock ECU will likely have a boost cut feature on detecting an engine fault.

 

You have no control or adjustability with an OEM ecu though once tuned. And he already has an aftermarket ecu anyway.

 

I'm running omex 600, I want a low and high setting the car is a 520kg 7 type kit car with 250-300bhp just to put things into perspective

I it given a turbosmart boost t but as I've looked into stuff more I'm more confused what's best

 

Can you translate that into English ?

 

No boost control.

Just WOT all over!

 

cant omex 600 do it for you???

boost cut is a very good feature and will operate long before you would otherwise realise you had a problem. After all who dial watches constantly while on a track etc?? no one...

 

sorry was on my ipad it converted it it seems!

i have one of these kicking about

http://www.turbosmart.com.au/product/boost-tee

if i have it mapped with a setup like this can i just fit a ebc at a later date or does it need to be set up on the rollers again?

 

going to call them today, but i dont think you can vary the boost levels,

regards the gauge i run a rachtechnology dash 2 so can set a warning for overboost on there but it will not cut it though

thanks

 

I cant think of too many aftermarket ecu's that routinely offer a limp mode or boost reduction on detection of a fault somewhere as some OEM ecu's will do
An overboost cut yes, but that's a very different thing.

The hardest thing to implement it, is specifying what is an actual fault worth reducing boost for.

 

That is just a fancy mechanical bleed valve.

Depends how much it changes your boost control by. Some EBC's can allow it to spool earlier and hold boost better at the top end. So ideally yes the car would need checked and possibly remapped under real conditions on the road. But also depends how it was mapped.
If whatever rollers you use can load the car up exactly the same as on the road, then that is another option.