Best boost controller on twins

[Kriss]

I\'ve asked my question because I don\'t have much experience with this.
We have putted a Greddy Profec on a rwin sequential turbo Supra, a sistem very similar to FD\'s one (I ws told the Supra sistem derivate from FD sistem): you can have a good control on boost but some problems of boost spikes in higher gear, expecially at full throttle.
I was intrigued by AVCR possibility to map boost in every gear in separate way, to avoid a problem like this.

Now I\'m more confused than before... I\'ve looked to Rice and Shaun graphics and I was impressed from the linearity of profec B.

@Rice: what were you problems with AVCR?

[shaunwil]

The 1st graph isn\'t the AVCR, there was another gadget that they made to plug directly into the PFC, it wasn\'t very good !

Go with the Profec, they are very good and easy to use, plus lots of people use them.

Shaun

[PGiljevic]

I\'ve asked my question because I don\'t have much experience with this.
We have putted a Greddy Profec on a rwin sequential turbo Supra, a sistem very similar to FD\'s one (I ws told the Supra sistem derivate from FD sistem): you can have a good control on boost but some problems of boost spikes in higher gear, expecially at full throttle.
I was intrigued by AVCR possibility to map boost in every gear in separate way, to avoid a problem like this.
 
Now I\'m more confused than before... I\'ve looked to Rice and Shaun graphics and I was impressed from the linearity of profec B.
 
@Rice: what were you problems with AVCR?

We spent literally 4 hours mapping the AVCR, and data logging it through the VBOX3, each time the boost control was not even, and it was very bad *inconsistent*.
 
I will dig up the files and post them here, it was incurable by me and later I found out no one could get it to work on that customers FD.
 
By comparison his friend who had a Profec B spec 2 whatever was flawless, in every gear and across both turbo\'s.
 
As a guide you don\'t have to worry about mappable boost levels in different gears untill you are making well over a honest 400bhp (blow up terittory for twins anyway), then its beneficial to use lower boosts in especially second gear to avoid over powering the tires. It\'s only a single turbo feature worth using.
 
If you want that then I strongly recommend the Blitz SBC I color, I use it for speed dependant boost on my own car and also combined with Race Logic Traction control.

[SiH]

If you know how to use the AVCR, it\'s a very good bit of kit. It does, however, need a degree in rocket surgery.

Profec for simplicity, however, my car always ran very well with just a PFC using the stock solenoids

SBC I colour offers, from what I\'ve seen, no massive increase in functionailty and performance from the lower models, it just has a stupid display to impress your mates and teenage girls with.

[Kriss]

We spent literally 4 hours mapping the AVCR, and data logging it through the VBOX3, each time the boost control was not even, and it was very bad *inconsistent*.
 
I will dig up the files and post them here, it was incurable by me and later I found out no one could get it to work on that customers FD.
 
By comparison his friend who had a Profec B spec 2 whatever was flawless, in every gear and across both turbo\'s.
 
As a guide you don\'t have to worry about mappable boost levels in different gears untill you are making well over a honest 400bhp (blow up terittory for twins anyway), then its beneficial to use lower boosts in especially second gear to avoid over powering the tires. It\'s only a single turbo feature worth using.
 
If you want that then I strongly recommend the Blitz SBC I color, I use it for speed dependant boost on my own car and also combined with Race Logic Traction control.

My maximum target is a power output around 350 hp, I think is the best you can have from stock twins (if you don\'t have BNR upgraded ones, for example...)
My willing to put a boost controller is to better map the car and have a smooth power output along all the RPM.
I don\'t want a drag or time attack car, I prefer to drift corners....

I think I\'ll go with Greddy profec B, then...

[PGiljevic]

If you know how to use the AVCR, it\'s a very good bit of kit. It does, however, need a degree in rocket surgery.

Profec for simplicity, however, my car always ran very well with just a PFC using the stock solenoids

SBC I colour offers, from what I\'ve seen, no massive increase in functionailty and performance from the lower models, it just has a stupid display to impress your mates and teenage girls with.

Ah it combines the power meter within the boost controller (previously two separate screens) so that is a good function.

It has a really good data logger on it which is nice too.

The color change aspect is EXCELLENT as it can be an excellent WARNING INDICATOR especially when set in 2 parameter digital mode for large displays.

You can input quite a few aux channels to display and log into the one unit, I input AFR, Fuel pressure and both front and rear EGT\'s another great feature.
Really excellent for using the power logging to have a quick run and look at the AFR across the rpm range, power and torque and boost, and its spot on if you calibrate it right
^ I use it all the time when I don\'t have the VBOX3i hooked up or set to log etc. Really excellent tool.

It\'s fuzzy logic and constant boost trimming/learning for different ambient conditions is better than most other models and its rock solid, the speed dependent boost control is faultless.

By far and away an excellent controller that fits in the FD perfectly as well

[Kriss]

Ah it combines the power meter within the boost controller (previously two separate screens) so that is a good function.

It has a really good data logger on it which is nice too.

The color change aspect is EXCELLENT as it can be an excellent WARNING INDICATOR especially when set in 2 parameter digital mode for large displays.

You can input quite a few aux channels to display and log into the one unit, I input AFR, Fuel pressure and both front and rear EGT\'s another great feature.
Really excellent for using the power logging to have a quick run and look at the AFR across the rpm range, power and torque and boost, and its spot on if you calibrate it right
^ I use it all the time when I don\'t have the VBOX3i hooked up or set to log etc. Really excellent tool.

It\'s fuzzy logic and constant boost trimming/learning for different ambient conditions is better than most other models and its rock solid, the speed dependent boost control is faultless.

By far and away an excellent controller that fits in the FD perfectly as well

Resuming: Profec B if I want to go simple, SBC I-Color if I have money to spend... right??? :bandit

The Spec-S of the SBC is enough, for boost pressure up to 1.3 bar (considerng the twins)?

[Kriss]

Or is better to go with this:

http://www.blitz-uk.co.uk/ProductItem-314.aspx

as is "twin solenoid"? It\'s better to control sequential twins?

[PGiljevic]

Mine is a Spec R, have used it to 2.2bar :3gears-lh

It\'s twin solenoid yes, this is for ultimate control, not specifically cause you have twins They are a great controller, learn boost super fast, can use metric or US units for boost if you prefer....... its one of the best instruments in my car, and say again very handy.

[Kriss]

Mine is a Spec R, have used it to 2.2bar :3gears-lh

It\'s twin solenoid yes, this is for ultimate control, not specifically cause you have twins They are a great controller, learn boost super fast, can use metric or US units for boost if you prefer....... its one of the best instruments in my car, and say again very handy.

2.2 bars on twins or on single turbo? I knew that with twin turbo you can\'t go over 1 bar boost...

[PGiljevic]

2.2 bars on twins or on single turbo? I knew that with twin turbo you can\'t go over 1 bar boost...

Single turbo.

On twins I have tested them to 1.5bar using the Blitz controller. Wanted to go more but car was not water injected so it was pointless and only had 4 x 850cc injectors so it was near its limits on petrol only.

Normal everyday setting on the single is 1.7bar

[Kriss]

I\'ll try to find money for the I-Color...