Does anyone have any opinions on this??? I was initially going to get the AVCR, but they are on backorder, unless someone can tell me who stocks them...

 

HKS EVC PRO>>>>> EASY AND GOOD

 

the HKS EVC EZ is a great unit

 

My AVCR Sucks,I hate it and be willing to trade it for something simpler anytime!

 

Do not touch the APEXi for single turbo external wastegate applications on a rotary, internal gate sytems work beautiful, we had Aussie distributor and tech assistance and could not get it to control correctly. Shame because I loved the displays. A friend in Puerto Rico says the HKS is used with much success. In Australia many of us use a pressure regulator valve made by Goyen. Cheap and very accurate, about $75au.
Regards-Anthony

 

I hear the Blitz SBC-ID is the best out there now. Has a stepping motor instead of a solnoid, so it responds alot faster. Alot of $$$ though....

 

I love HkS EVC4 and seen it hold up to 2 bar fine.

 

The only thing I dont Like about my AVC-R is.....
In order to run 15lbs I have to set the duty cycle set at 85% and boost at 1.25. Other than that it is sweet. Anybody have any idea why I cant get 14-15lbs with the contoller set at 1 bar.

 

im a firm believer of the stepper motor..

 

blitz dual sbcid 499 +shipping

 

don't tell me this. i just bought a avcr for my external wastegate system.


for those of you having problems with the avcr, did you set the desired max boost using the wastegate spring and then set on EBC the duty cycle to 70% and your desired boost?

 

i ave used the avcr on 2 cars now and i think it sux

 

why?

 

I like my AVC-R, and I think gmonsen is happy with his, too. It is a bit tricky to setup, but it has a bunch of cool monitoring features that I find useful.

It does overboost a bit in high gears, but I think I should be able to fix that with some adjustments to the base duty cycle for different gears (haven't tried it yet).

-Max

 

I AGREE I HAD IT ON MY MR2 IT BLOWS!!!

 

What is wrong with the Profec B. I was going to go with that and have only heard good things.

 

I made a manual one for my friends 60-1 setup. It is very accurate and reliable. Made it using an adjustable pressure relief valve (ball and spring) you can get from Grainger or McMaster Carr for around $8 and a couple barb fittings. Very simple. You can get one already made from www.boostvalve.com

 

this is a great thing to know for my future project.

thanks for the information.

 

SBC-ID. I think it is the best for the money. $635 but HKS EVC pro is about the same, rite?

 

for my FD with greddy T78 kit i have a blitz sbc id its expensive $500+ but a very good unit. for my 89 TII i have a greddy tvvc coming

 

What is wrong with the Profec B. I was going to go with that and have only heard good things.

There is nothing wrong with the Profec B, I and many others (Ari Yallon, Steve Kan)have used the Profec B for years without a single problem. As with any product, there were some Forum members who had problems with it, but I believe they some how had a defective unit or more likely had it installed incorrectly.
I have heard mostly good things about the AVRC and the EVC so you would probably be ok with either one of those also. I would compare features and price and decide which works best for you.
My only other advice would be to stay away from any controller using Fuzzy logic (i.e. Profec A).

 

I thought fuzzy logic was helpful with single turbo, and it only was a problem with the stock sequential turbos. I think i got that impression from rx7.com.

Are you saying Ari Yallon currently uses a profec B?

 

The AVC-R is the only EBC I have used, and yes it is a bit tricky, but it is IMO a high quality unit. Here are some observations that may/ may not fit your problem.

The AVC-R has a minimum duty cycle of 20%. What that basically means, (not exact), is that whatever rate your wastegate spring is, the minimum amout of boost that the AVC-R can control is 1.2 times the spring rate. For example, if you have a 10 psi spring, the minimum amount of boost that the unit can effectively control is 12 psi. It is just a function of the efficiency of the solenoid. Also, A'pexi recommends that you size your wastegate spring such that the maximum boost you want to run can be controlled by a 70% duty cycle. With a 10 psi spring, this would be (very roughly) 17 psi. (I happen to see on mine that it is not an exact calculation like that but more a curve of a function.)

SO, if you want to run 10 psi, you should get a 5 or 7 psi wastegate spring. The AVC-R also lets you choose between 3 preset boost levels, which I like. OFF, A, and B program. (Off is the spring alone.)

To manually set the duty cycle (which I have to do), you need to pick your desired boost level between 1.2x and lets say 2.5x the rate of the spring. (remember it is more of a functional curve.) start with your duty cycle low, run full boost, and see what boost level it gave you. Raise the duty cycle and repeat until you are at the percentage (usually a 2-3% range) that will effectively control the level you want. Repeat with program B...

For example, I have a .5 bar spring. My A program is .6 bar with the duty cycle at 25%. My B program is 1.0 bar at 64%.

Hope I helped someone...
~Jeremy

 

"With a 10 psi spring, this would be (very roughly) 17 psi."

Whoops. Actually, more like 20-25 ish psi.

 

Well they can work well in either application but sometimes those stupid little computers can get confused and wind up making a lot more boost than you asked for. This is especially true if your constantly making adjustments to your tunning and setup, forcing it to learn new boost characteristics. I have lost two motors because of these fuzzy controllers and I have seen it happen to others. You could not pay me to put one on my car.
I installed a Profec-B years ago and have never had an over boost problem since.

Well he is a Greddy dealer and last I knew that was what he was using, of course he is now selling Apex too so at this very momment, who knows. If those fuzzy controllers didn't like the two stage turbo I don't think they would handle nitrous kicking in at random either, what do you think?