Hi Everyone:

I'm debating if I should install an older Profec B into my FD or not. The goal is to control boost spikes in accordance to the "3 mod" rule. A buddy of mine said that its not really necessary...but I would like to get a second opinion. So would installing a Profec B help keep the stock boost pattern w/ my current mods?

Here's my current setup:
Downpipe, Stock Cat, RB Duals
Greddy Intakes, Greddy Elbow


Thanks in advance!

 

Did you port your wastegate? If not, it won't matter how nice of a boost controller you've got... you'll still spike. If you DID, then the Profec-B is a popular choice. Personally, I like the KS EBS III, but I really think that when your hardware's in order, it's just a matter of personal preference.

 

this is incorrect.

i would advise getting the controller. i also have one, and it works perfectly. what i think dark is refering to is creep. as long as you keep the stock cat or go with a hi-flow your fine. porting your wastegate is only needed if you have a midpipe because of the large increase in flow.

i also like the profec b cause of its high and low boost settings. you can set one for 10 psi and another for as high as your tuned for. very handy for track/street use, or impressing your friends

 

4CN, you're right, I'm talking about creep. However, I'm pretty sure that with a high-flow, or even the stock cat, some creep will occur with the flow mods he's listed.

But again, let me say that the Profec-B is a good choice. Not the only one, but one of the most popular.

 

^
easy mixup

 

install it

only do you good in the long run.

 

I had 14 psi boost spike issues with only downpipe, catback and apexi intake. My profec B spec II solved this problem.
Later, I tried full exhaust. Boost creep came and my boost controller was not useful in order to control this, so I'm running my hi-flow cat again.

 

when i first installed my downpipe with catback and intakes i would spike to 15psi added manual boost controller and it didnt help at all so be careful when trying it but it wont hurt to have one on for future mods

 

I'm there right with ya. I like the look of the older profec b over the new Spec II but wondered if the spec II is the better one to get.

 

^^ The specII really just has a few more added features and is supposed to be easier to set up initially. That is all the difference is.

 

this might help ya bud..

i saved these from a while ago. i could decide between the profec-b and spec II.

profec-b
http://www.rx7.org/Robinette/profec.htm

prefec-b spec II
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/profec-b-spec-ii-settings-200113/
https://www.rx7club.com/showthread.p...profec+install

 

sure it was working properly?

 

check around. Most love the older spec B. I have never tried the newer one as my old version has been perfect. Very simple but effective...

 

+1

i love mine