revsteve

iTrader: (6)

So I installed the profec type s this weekend yet cannot get the car to boost past 7psi (no matter what I try).

Everything seems to be installed correctly and the Greddy manual assumes that the unit limits the turbos to 7psi when its not getting intake manifold pressure.

First Question: If the unit turns on and the stepper motor limits my turbos to 7-5-7, is it safe to assume the motor is working correctly (in that is keeping the wastegate in its open position)

Second question: Before the install of the profec, I had a boost gauge installed on the second nipple on my intake manifold. To install the profec, I T'd off the that nipple and have one part going to the boost gauge and the other to the back of the profec (through the airfilter they Greddy provides). Would this prevent the Profec unit from getting an accurate read on the intake pressure?

Third Question: Could a mixup of which hoses are plummed into the "IN" and "COM" ports of the stepper motor cause the unit to think that its not getting manifold pressure at all?

I figure this is a good starting point.

Let me know your thoughts.

Thanks!

Steve


On the second accessory nipple on my intake manifold

Sgtblue

iTrader: (16)

Steve,
I'll me monitoring this thread, as I intend to install this same BC soon.
Ref. your second question...just a thought, but instead of 't'ing off the second nipple of the UIM, why not 't' off the boost sensor line (?) Not sure it would make any difference, but that vac source would be closer for your gauge and I'm thinking you could eliminate the possibility of interference between the gauge and BC.

revsteve

iTrader: (6)

Hey Jim -

Thanks for the suggestion. As soon as I can get some control over my boost, I will check out how steady it holds. If it seems to oscillate a bit then thats something I'll consider.

Nightly Bump as well!

marines38

Steve,
I dont know much about engines, but i do know that i had the same problem. I have the profec b spec 2 and i couldnt get my fd to hit more than 5-7 lbs no matter what i changed that thing too. Long story short there was a hose that was disconnected somewhere, i think the intake manifold. Somewhere very obvious; didnt have to dig to find it. When i resealed it I never turned the boost controller down and boosted over 20 lbs and blew my engine. I have since got a new one but, i just wanted to throw my 2 cents in.

revsteve

iTrader: (6)

Marines - thanks for the tip. I'll have to go back and double check to make sure everything is plummed up correctly. Also, I'll be sure to turn the boost controller down before taking it for a test drive!

Anyone know where this install may be wrong?

revsteve

iTrader: (6)

Another thing just occured to me.

On the Turbo manifold there are 2 nipples side by side. One plumbs into the wastegate acutator, the other into the pre-control actuator.

The profec needs to be plummed in between the wastegate actuator and the turbo manifold (which is actually the DRIVERS side nipple). I plugged it into the wastegate actuator and the PASSENGERS side nipple.

Would this make a difference?

revsteve

iTrader: (6)

bump

gafu mazda

i took my 7 to JPR for a boost leak and not to say this is whats wrong with yours but check your intercooler hoses,make sure everything is where it should be.Also,for some odd reason,the intake hose (T) to the top of the BOV was off(maybe he left it that way).I put it where it should go and it gave me less boost than when he set it up.Again,im not saying thats it but just suggesting for you to try those things out and make sure theyre connected/disconnected.Hope you get better help from a REAL Rotorhead.

Narfle

iTrader: (16)

You should be using NO and COM. internal wastegates are NO and external wastegates are IN. I dont know why but thats what the manual says if you read it. My type S works fantasticly. I plumbed both the vacuum sources into a T into the valve unitand then both back out to the PC and WG.

revsteve

iTrader: (6)

Hey Barban. I read you're write up and attempted it install it your way. I had MAJOR boost problems right away with your install (using the precontroller & the wastegate).

Also - if possible, can you tell me how you have your set up?

For example, right now I have the passengers side nipple on the wastegate actuator plugged into the COM side motor, and the passengers side nipple on the turbo manifold plugged into the NO side of the motor.

I didn't T off anything.

Can you maybe clarify your installation a little bit?

Thanks!

Steve

Narfle

iTrader: (16)

Did you cap off the other side of your actuators or plumb them back in? I siggest capping off both the ecuy side of the actuators and also capping the hardlines to the ECU solenoids.

Where the vacuum source for the actuators is. Use both nipples and T them and run the consolidated line into greddy solenoid im pretty sure its "NO" but the manual is clear on that. Then(Assuming i have my lettered sides corrects run the "COM" side out from the greddy solenoid and T it so that you have two hoses. run one of each of these to both the precontrol and wastegate(the passenger side nipples on the actuators). I left the dust cap in the unused side of the greddy solenoid.

I hope that clears things up. I think you problem may be that youre using the wrong sides of the greddy solenoid. Ill chop up a diagram later if you need me to.

revsteve

iTrader: (6)

Hey Barban - The diagram would be of great help.

In your thread it seems you plugged up one of the nipples on the turbo manifold (drivers side if I am not mistaken). My question is do you think it matters which nipple I use to send to the greddy motor?

I believe the one on the left went to the precontrol actuator and the one on the right went to the wastegate. I guess I am not sure it matters.

I'll check all my connections again tomorrow when I get home. I am pretty sure I have the COM side going into the wastegate actuator and the NO side going into the manifold.

[EDIT]. I plummed up the Drivers side of the wastegate actuator and plummed up whatever that plugged into as well.

revsteve

iTrader: (6)

morning bump. no answers on my original questions still....