Alrighty, time to pick out the boost controller I need. I'm curious what people run on their cars... I'm pretty sure AA sells their kits with a HKS EVC (don't know which model though)--also correct me if I'm wrong on this, I seriously don't know.

My options include the following (I don't like most others):

- Blitz SBC i-D (dual solenoid design)
- Greddy Profec-B Spec II (also dual solenoid)
- HKS EVC IV (seems very simple but uses stepper motor)

I'm really liking the Greddy and the HKS due to the low profile display (so I can hide it somewhere under the dash or sideways near the radio (in leg area). Also, the greddy is the only one to have a red display to match BMW colors... minor detail which doesn't change function is still important! :)

The Blitz seems to be the best but mucho expensive. Also, according to the sport compact car review (http://www.sportcompactcarweb.com/tech/0207scc_boostcontrol/) this one has the sharpest boost curve. Although the test was done before the Profec-B Spec II which now utilizes the same dual solenoid design.

Anyway... I'm doing more research but am leaning towards the Greddy because it seems simple, small, colors match the interior, uses two solenoids and finally it's much cheaper than the other two (check ebay).

So... here's what I'd like to know... anyone using any of the above boost controllers? Do people have a preference or a purely educational/theoretical oppinion? I'm shopping for the best.. but willing to compromise if it's a small compromise for fit/finish/quality/ease/price/etc.

Thanks a lot,

Boris
(Please don't recommend MBC... I don't want one)

Hey Boris I've had the Blitz SBC id ...this is a "Great" boost controller. The display is small and can actually double as a boost guage measuring in 10/th's of psi.It will also measure in "Kpa"
It has a manual and auto mode...you will be amazed at how much better /faster your turbo will boost when adjusted right. You can also save 4 preset boost points...In my miata I had it set a 12,15,18,22psi just at a touch of a button.
The duel solonoid controls boost very accurately... once set right...you wonder what overshoot is? It has 5 reference points to pick up the boost signal in order to control it.. IMO this has got to be one of the best EBC made... Check Ebay..."japandy"I paid 430.00 for mine I wish now that I hadnt sold it.. I'll get another one for my custom set up when I get a little closer.

I wasn't aware of boost controller applications on a S/C car. Are you going to a turbo Boris?

Ahh, thanks, that's exactly the feedback that I've read about the SBC so far... one of my friends used it in his Supra so I have to talk to him about it some more... but I'd also like to know how that compares to the new Profec B since they both use dual solenoids. Before the Blitz was one of the only ones to use it. I'm guessing the response should be similar due to that alone...

BTW, I did a search on eBay, you're right, they can be had cheaper than I thought... I'm still torn up between those two. I think a friend of mine has an account with GReddy so we'll see what I can get that little guy for...

Are you using the Blitz for sure for your turbo, or will you consider anything different, just curious?

Thanks,

Boris

Originally posted by MKS
I wasn't aware of boost controller applications on a S/C car. Are you going to a turbo Boris?

:devillook :D

you putz, all that research and you still arrive @ the wrong conclusion:stickoutt

Originally posted by zenon
you putz, all that research and you still arrive @ the wrong conclusion:stickoutt

Lol... not quite sure what you mean.... but.... umm.... I really like everything I read about the blitz... ESPECIALLY that I can select boost settings for each gear.... that's just sexy.... but the Profec is just a straight clean boost controller without all the "fuss." Hmm... I have a little time to decide.............. :)

Boris

all that research.... you buy a SC. damn, its not one month and you're already talking about ripping out OBD2 and throwing on a turbo. jeeze.:D
;)

Originally posted by zenon
all that research.... you buy a SC. damn, its not one month and you're already talking about ripping out OBD2 and throwing on a turbo. jeeze.:D
;)

I need to do something with my "free" time :).

Boris

spend that time installing a nutz custom turbo kit..... use your time more effectively.;)

jeeze, look @ how much time you've wasted with these little "supercharger thingies":)

The Blitz power Id must be purchased to use Rpm or speed dependant boost control.
The profec B spec II's best feature IMO is the remote Hi/low boost switch. That can be mounted on the steering wheel.
Ive heard but cannot confirm that the Profec B does not like higher boost > 20psi , or a really fast spooling turbo? They may have corrected this with the spec II?

Spend the extra money on the Blitz power ID II you'll love it.

Originally posted by ///3oris
Alrighty, time to pick out the boost controller I need. I'm curious what people run on their cars... I'm pretty sure AA sells their kits with a HKS EVC (don't know which model though)--also correct me if I'm wrong on this, I seriously don't know.

Boris,

AA uses the GReddy PRofec B on their kits, up to and including the Stg4 cars. If I was in the market for one of the ones you mentioned, I really like the features offered by the Blitz unit, but I also like the remote switching capability of the GReddy unit. Decisions, decisions.....

are there any more units out there that can vary Boost with RPM? that's a very important feature for me.

Originally posted by zenon
are there any more units out there that can vary Boost with RPM? that's a very important feature for me.

AVC-R, but it uses a stepper motor...

"but it uses a stepper motor..."
so? turbo dummy here......

Originally posted by zenon
"but it uses a stepper motor..."
so? turbo dummy here......

Here's a quote from the link for SCC posted below:

"Electronic controllers use either stepper motors or solenoids to do this. Stepper motor assemblies vary the opening of a precision valve, similar to a water faucet. This action is accurate, though somewhat slow. Solenoids, however, operate in either a fully open or closed position, but can change this state very quickly, feeding and releasing full pressure so quickly that the pressure in the diaphragm can be accurately controlled. Dual solenoids will give an even greater degree of precision. The HKS EVC EZ, EVC IV, and GReddy PRofec A all use an identical stepper motor assembly. The GReddy PRofec B and Blitz SBC i-D share a common dual solenoid design, though they drive them differently. A'pexi stands alone with its single solenoid design.

If a wastegate is set to 10 psi, it may start to open around 6 psi, slowing the turbo's acceleration and finally reaching equilibrium at 10 psi. Boost controllers can improve turbo response by keeping pressure off the wastegate as long as possible, making more energy available to drive the turbine. Just as boost reaches the set point, pressure is dumped on the diaphragm to rapidly open the wastegate, and hopefully keep from spiking the boost."

I figure this explains it much better than I could :)

Boris

"A'pexi stands alone with its single solenoid design."
so its not a stepper, its a single solenoid. :p

thanks for the quote, very informative. :)