[decooper]

What would you tech guys suggest as a good boost controller for a Single Turbo(beyond a Profec B)?

 

[decooper]

To drone on further, or to make this more specific still... a boost controller good for 500 to 700 rwhp.My suspicion is to stay w/ HKS for electronics(stepping motor)...but I truly don't know. The most I plan to use on the track is 5-550 rwhp so the car does not become "unruly"(read: I crash). Are there any controllers that you can program for specific boost in specific gears?

Dan(.....shopping ahead)

 

[wizard_of_oz]

An AVC-R has gear-specific boost. Some people have had problems with inaccuracy.

I think the most stable boost controller is a Grainger valve.

 

[decooper]

Oolan,
Thanks for the advice. The T-66 sounds great! I'm looking at some of the turbos from Innovative myself. Can you tell me about the Grainger valve if you don't mind? Innacuracy is not reasonable with what I'm looking for.
No "gizmos" or "gadgets."

Dan
'97tt6spd race prepped(turbo's leaking oil...but holding boost)
'94tt6spd stock

 

[wizard_of_oz]

Oolan,
Thanks for the advice. The T-66 sounds great! I'm looking at some of the turbos from Innovative myself. Can you tell me about the Grainger valve if you don't mind? Innacuracy is not reasonable with what I'm looking for.
No "gizmos" or "gadgets."

Dan
'97tt6spd race prepped(turbo's leaking oil...but holding boost)
'94tt6spd stock

A grainger valve is a pressure-variable restrictor used in industrial compressed air applications. I haven't tried this personally, but here are some links:

Instructions

The valve itself

My archive of interesting big list posts includes some very positive results with this setup. However, you need to get under the hood to set your boost, and what boost you get from an individual setting is a matter of practice.

 

[decooper]

Oolan
Very specific advice-thanks for the links and follow-up.I'll keep this in mind.
I am probably looking for a great electronic controller as opposed to a solution like this. Lord knows this is as simple and direct a solution as you could hope for.

 

[Jim Swantko]

I will be installing the HKS EVC EZ this weekend. I'll let you know how I like it. I am replacing the Profec B with the EVC because it only lets me get to 20 psi. Other than that issue the Profec worked great.

 

[AZSupTT]

How much for your Profec B...i'm looking for one.....

 

[wizard_of_oz]

Oolan
Very specific advice-thanks for the links and follow-up.I'll keep this in mind.
I am probably looking for a great electronic controller as opposed to a solution like this. Lord knows this is as simple and direct a solution as you could hope for.

I have an AVC-R, and I'm thinking of adding a MBC inline with it (set to 15 psi or so) for faster spoolup. Heck, for $20-30, it's worth a try...

 

[Grant]

Oolan, are you saying that the AVC-R doesn't keep the solenoid shut before the turbo spools? Thats pretty poor for such an expensive EBC. It doesn't vary the duty cycle based on boost at all?

 

[wizard_of_oz]

Oolan, are you saying that the AVC-R doesn't keep the solenoid shut before the turbo spools? Thats pretty poor for such an expensive EBC. It doesn't vary the duty cycle based on boost at all?

The AVC-R won't go to 100% duty cycle, it will only go to 90% duty cycle. And it will do that only if you set it up to feed back; otherwise it will go to a fixed duty cycle based on engine RPM.

A valve will get it to 100% duty when building boost.

 

[decooper]

The AVC-R is known for having a slow stepping motor, while the HKS EBC are known for the opposite(FAST). I'm thinking myself of getting the EVC IV or being a fool and getting the EVC PRO because of tunability(RPS will have fun with that).Whatever the case, I have until the end of January (I have permission from the wife to do my upgrade then). No decision set in stone and lots of good ideas from all you guys. Jim, I know I'll have the same probs as you w/ my Profec B when RPS has me go single/w/fuel/cams etc.

 

[BPUed]

I really like my SBC-ID from Blitz. I've also heard, but have not tried, that the Power Meter add on will allow you to set boost based on speed. Test reports have said that the really time chassi(spelling) dynometer is fairly accurate as well. Might be a good choice. My business partner has the EVC IV and it is nice but I like the Blitz better.

Jesse

 

[SupraDawg]

Go with a manual boost controller. They are the cheapest and most reliable.

 

[decooper]

Jesse,
Why do you like the Blitz better? Aesthetic or tech reasons?
Fashion or performance?

 

[BPUed]

I like it for both reasons. Mainly, with the Dual Solenoids and the Power Meter add-on it performs really well. When adjusted right the control holds boost really well. Generally, it only spikes up .1 psi at most. The blitz setup has a specific tunability for sequential type turbos(factory setup) or for any other type of set up. The Controller is very fast acting, and extremely easy to use. I have installed EVC IV's,Pro-fec B's, and AVC-r's on different cars and I wouldn't trade the Blitz for a single one of them. The only other one I would consider for my car would be the EVC IV, but the fuzzy logic on that controller does no good with the stock turbos. If your going single right away, then it won't make as much of a difference.

Jesse

 

[mello2]

I prefer the manual boost controller. I just have a thing against all the gadgets in a Supra. VPC and S/AFC are enough (those are in glove box)and eventually something like the Techtom and the Motec Pocket Lambda. I can't find a reason why I would want to constantly adjust my boost once my car is tuned. Set it and forget it.


Melvin

 

[decooper]

I wasn't going to post anymore(imagine....self control...)on this one anymore..but I wanted to at least give a view on this.In my opinion, and I do NOT consider myself a great driver... but there is a lot of fun to be had in changing to high boost down a front straight...its part of the fun of a turbo car.Our normally aspirated brothers don't have that as an option(ex.380rwhp-425rwhp). As with coilovers, it nice to have the option of adjustability/tunability. On the more tech sections of the track
its nice to run low boost...As I get better and better, I may fiddle less...but if I'm spending a good chunk for a turbo upgrade...I want variable control from the cockpit. The whole idea of this exchange-at least for me-was to find out what the rest of you guys think. I'm not interested in gadgets either,only the best functional equipment!
Once I get my Haltech put in..I'm shooting for 650RWHP at high boost, with 550 low boost. There maybe some very pissed exotics at the track(there already are...I just want to make it worse)

Thats a joke. Sort of.

 

[BPUed]

I agree that most people set their boost and forget it, but, if you set it high and are just driving around town you are burning a lot of extra gas. When I race I turn the boost up to where I want it, then when I'm done racing and driving home from the track I drop the boost down in order to conserve fuel. This combo works pretty well.

 

[Grant]

I always have it set to 18 psi on the street and autocross. If I want less boost, I use less throttle. It is a little harder to control coming out of a corner (since he MBC keeps all pressure from the wastegate until desired boost is reached) but you get used to it.