corymarc.com

iTrader: (2)

My mods are dp stock cat and rb dual cat back Apexi intake and pfc with stock map.

My problem is that my car boosts to 10 psi normal then "creeps" to about 12 psi till I let off the gas.

Should I have creep with this setup? How do I fix it?

moconnor

iTrader: (14)

It is not obvious that this is creep. What is your boost pattern? What is the boost before transition and when does it go from 10psi to 12psi. What is controlling boost - the PFC or some other controller?

The base mod map on the PFC can easily handle 12 psi with those mods.

corymarc.com

iTrader: (2)

First gear boost pattern is all over the place. All other gears 10-8-10 Im pretty sure. I think my primary may be a little lower that 10.

I dont have a boost controller. Just the pfc with base map. Is the base map letting it go to 12?

moconnor

iTrader: (14)

The PFC base mod map has a default primary setting of 11.5 psi before transition and 10 psi afterwards. However, like many, I got very poor boost control with the PFC.

However, it was consistent in all gears. You might want to replace your check valves for a start.

corymarc.com

iTrader: (2)

I have new check valves and newer solinoids to replace the old ones. But thought I would control my boost first.

dgeesaman

iTrader: (7)

With a stock cat it's almost certainly not creep. (Assuming the cat isn't punched out)

What RPM does your boost start going above 10? How quickly does it reach 12?

Dave

corymarc.com

iTrader: (2)

I have since replaced all of my check valves. And my boost is just a little unpredictable. Maybe a lazy solenoid. But my boost boosts very fast through its pattern. And boosts past 10psi to 12 psi before I let off the gas. In all gears but first gear and not sure about 5th gear to many cops.

Should I get My waste gate ported or a restrictor plate even though I have my stock cat. It is the original main cat with about 120,000 miles on it do you think that its to damaged


Thank you for you help

RXtacy

iTrader: (7)

Like dgeesaman said, with the stock cat it is very unlikely to be creep, therefore there should be no reason to put in a restrictor plate or port your wastegate for this set up. Get yourself either a manual or electronic boost controller, and that should be able to control your boost.

corymarc.com

iTrader: (2)

I didnt know that boost controler would fix creep. What is a good manual boost controler? and my pfc cant control this?

DMoneyRX-7

iTrader: (2)

I don't think RXtacy meant that it would fix your creep but rather control your boost patterns easier/better. If he did mean it would fix your creep then that is wrong. Boost Controller fixs spikes.

corymarc.com

iTrader: (2)

Im just trying to fix my creep so I can put my foot more than half way down to the floor. And dont know why Im getting it with my mods

corymarc.com

iTrader: (2)

I know that its over at least 4500 rpm before it starts to go over ten but reaches 12 slower than it goes to 10 psi.

RXtacy

iTrader: (7)

Your right DMoney I was not refering to a boost controller fixing creep. However I do not see the problem he is having as creep. It is very hard to imagine creep which to my knowledge is caused by having very little back pressure and therefore overflowing the capabilities of your wastegate while you still have the stock cat. What I think might be going on is the only way the PFC can control boost is by using the slow stock solenoids. If you where to have an electronic boost controller for instance this uses a much faster operating solenoid therefore more effectively controlling boost.

corymarc.com

iTrader: (2)

So having a boost controler will bypass my lazy old solenoid? will a manual boost controler fix it as well?

DMoneyRX-7

iTrader: (2)

ya, you aren't experiencing creep. If you were it would not just stop at 12psi.

An electronic boost controller replaces the stock solenoid with a new aftermarket one.

A manual boost controller keeps the stock solenoid so if the problem lies in your stock boost control system, a MBC might not fix it.

Besides, EBC's are just awesome.

ahad

+1....get an avc-r