When i bought my Profec B, the manual it came with new, was pretty much unreadable. So, i thought i figured it out, but i guess wrong. With the PB, turned off, the motor still is making 12+psi on bolth turbos. With it on, and everything turned down all the way, i get 14psi. If i where to have the little vaccum hoses going to the wrong place, would it do this? I did'nt want to swap the places of the hoses going into the stepper(?) motor, and blow up my engine. Or do you guys think i'm getting boost creep?
Heres a list of mods.

M2 intake
Efini y pipe
Pettit ss down pipe
Pettit ss mid pipe
Gutted stock cat back (I like the look of bone stock )
Pettit unlimited ecu
Profec B

Thanks, CJ

 

First of all you didn't tell us where you put the hoses so I can't tell you if you installed it wrong.

Sounds like boost creep though.

With the profec off you should normally get about 7psi...with that midpipe of yours seeing 12 isn't uncommon.

Strange...some get the creep and some don't. I know I never did with the SS midpipe.

 

Sorry about that...I feel like a moron. I just hooked it up, like it says at the Rob Robinette page. I put the "In" side on the stepper motor coming from the turbo and the "out" sode going to the wastegate.

I was under the impression, that a electronic boost controler would help get rid of boost creep. Is'nt it?

Thanks for the help. Tomorow, i'll get some pics. CJ

 

You know, it should'nt be boost creep. Because it stays pretty steady at 14psi. It does'nt climb any higher than that. So the problem is in either the controler hook up, or something else related to the vaccum lines around the Y pipe.

What i did was install a Y pipe, profec b, and M2 intake all at once. Should of just took my time and did it one thing at a time.

CJ

 

did you cap the other side of the wg? theres 2 barbs on it..one needs the out line.and the other needs to have a vac-cap on it...then double check you vac-line to profec

creep can be lessend, but it cant be eliminated completely...creeep is the result of too much exhaust flow and a tiny wg...when i first put my mp on i creeped to 16psi..the i pored the hell outa my wg and could only creep to 10.5-11psi...

 

I'm not shure what you're talking about, but is it the pre-spool? If thats what you're talking about, i did'nt touch it. Just left the stock hose with pill inside of it.

So, what i should do is cap bolth ends of the pre-spool vaccum hose? Is that correct?

Thanks for your guys help. CJ

 

Pay particualar attention to steps 6 and 7. The profec B will not control boost creep. You can only do that by porting the wastegate or getting a popoff valve.

Profec B Install

1.Remove air box or aftermarket intake.

2.Mount the Profec black box or Actuator behind the headlight.

3. Run the wire into the car through the firewall or through the steering column boot.

4 Mount the controller on the drivers side of the car. I chose under the steering wheel were the little A/C vent is that blows into your crotch Just pull out the vent or cut it and velcro the profec under there.

5. Now hook up the power and ground wire. Run the power wire down to the drivers side kick panel. There is a fuse box you can tap into. Just remove one of the fuses and slip the wire in between the fuse and punch it back in.

6. Now its time to hook up the black box. Look down at the turbo and you will notice 2 small hoses that run from the actuator to the wastegates. The outside hose is longer than the other. Remove the smaller of the hoses, which is the inside hose. Run a hose from the Actuator to the IN on the black box and from the OUT on the box to the wastegate.

7. On the back side of the wastegate is a small hose that runs up to the engine. That is what lets the ECU control boost. Pull the hose off the end of the wastegate and cap the nipple on the wastegate. You can let the hose dangle, there is no need to remove it.

8. T-connect the hose from your boost gauge to the back of the profec B.
Put the car back together. Make sure the power works on the profec.

9. Take the car for a spin. Leave the Profec OFF and go WOT. You should see about 7 lbs of boost. Now turn on the Profec with the dials turned all the way down. Which I think is to the left. Get on a good stretch of Highway and in 4th gear go WOT. Slowly turn the dial up to the boost level you would like. Keep the MILD/SHARP dial a few clicks towards SHARP.

There ya have it...apparently there are other variations of install out there. This seems to be the standard one.

 

Thanks alot Evot23. When i'm up at my shop, i'll tear into it. Thanks, CJ

 

naa what im tlkin abt is the wg..

i wish i had a pic... theres 4 nipples down ther 2 on wg, and 2 on precontroll...leave the pre controll alone...now the 2 on the wg (green thingy you hooked *out* line to...theres 2 barbs, one has the *out* line on it and the other needs to be capped...stock it has a hose on it that leads to wg controll solonid...
hope that helped

 

Is this the correct hose?


I did'nt have much time to work on my car tonight, so i just removed everything, and snapped a couple pictures. Hopefully this weekend i'll have time. CJ

 

yep thats the one that should be capped...
then the profec should work

 

yep thats the nipple that needs to be capped


then it should work..let us know



err dont know why it double posted, sorry

 

Thanks guys for your help. As it turns out, everything was hooked up right, just needed to cap the wastgate nipple. The only time i got to test it was on a 40* night. Even when it was that cool, the motor would only see 10psi with the profec off. With it on, but the settings turned all the way down, it would still see 10psi.

I realy appriciate your patience.

Now, to fix the intake leak, and perhaps a tie wrap job.

CJ

 

I have a quick question (I hope)
What is the difference between an actuator wastegate and an external wastegate?
External is an upgrade/ has to be bolted on. Actuator is what the FD has stock?

 

from what I know an external wategate is 100000 times better at containing boost.

 

so the stock Wg on an FD is an actuator type?

 

Yes, so set the dip-switches on the unit accordingly. (They come factory-preset the right way). Here is a site where you can download the factory manual, in english even.

 

And you use the 'over boosting' setting when you get more than 7psi with the settings set to 'low'...
I am still getting about 9 psi with it set all the way low..
any thoughts...
I have the hoses hooked up right, and the other side of the Wg blocked off...

 

I had the same problem too, until I went non-seq. Then I would see 7psi with creep to 9psi. CJ

 

can someone post a link to that website where it tells you how to hook up the profec b. I got the same problem just a little more drastic. Also when u hit 15psi or higher will the comp shut stuff down?

 

Here are some of the websites I looked at

http://www.scuderiaciriani.com/rx7/profec_install.html

and
http://www.rx7turboturbo.com/robrobi...boost_note.htm

but I don't think my problems are from the profec B...I think there is something else I am not aware of.

Is there a certain hose (or couple hoses) that are used for first great boost??? maybe one of those has a leak or something...I just can't figure out why I get practically no boost in 1st great...hummm...