Street King

I was just wondering if a profec b can control boost with a mid pipe along with a DP and catback. My mechanic doesnt recomend this at all. He talks about boost creep and that I should never get a mid pipe if I want to stay reliable. I also want to get a M2 ecu would this help level my boost out? I just want to run a max of 12 psi right now while still having stock twins!

ttpowerd

umm...m2 is not programmed for a mp. Check out there site www.m2performance.com
also with a mp you will probably have to port the wastegate to better ensure that you will not have any boost creep

Bacon

iTrader: (12)

depends, some people run a mp and get little to no boost creep..myself, i would creep up to 16psi, then i ported the wg and could only creep to 10 psi...

if u get your waste gate ported it wont be a huge problem, (but theres astill a chance it could) but your prob better off running a high-flow cat especially if u only wana run 12psi

1bad7

a MP will definately cause boost spiking. ive got a full exhaust (pettit MP, DP and apexi GT-spec) and im spiking up as high as 15lbs when my profec-b is set for 10lbs. after alot of WOT runs and some fine tuning ive got the spiking down to 13lbs buts that still high on the secondary. i'd rather have full 14lbs but right from 3000rpm and not 6000rpm. next im gonna put on the silencer and see if that helps out a bit.

Mahjik

iTrader: (1)

Here's a good thread discussing boost creep:

https://www.rx7club.com/forum/showth...threadid=26389

MontegoRX7

What does it take to port your wastegate? Is it something you can do at home, or does a shop need to do it? How much does it cost?

Bacon

iTrader: (12)

porting the wg, requires removal of the turbos, then removing the front turbo from the manifold wich connects the 2...then taking a die grinder or such to remove the material untill it almost excededs the wg flapper...

can be done your self if your compitent with working on the car, but not a job for the timid....
i did it my self, just plan a sat to play with te car, should be easily turned arround same day as long as theres no problmes

badass7

As Joe D would say..."Do a Friggen Search man !!" LoL jk Joe Dog !! I am contemplating the same thing but don't want to run into boost creep. I've heard many diff. stories on this. I've actually driven in one of our member's car that has an IC, DP, MP, and CB, stock turbos and needle valves and he has NIL to very minor boost creeping..go figure. I want to drop one on my car and see if I can blow something up.

Street King

I decided to get my wastegate ported but I don't want to do it myself seeing I'am a little afraid to play with the turbos so I'll leave it up to my mechanic. Are there any downsides to porting your waste gate and how much do you think it should cost?

Street King

Also your right about the M2 not accepting a mid-pipe so i decided to go with the pettit unlimited ecu!

Bacon

iTrader: (12)

depends its more labor than any parts..prob take a good mechanic, 4hrs to r&R the turbos, and 30 min of porting with a die grinder...
so @ 65$ per hr- 292.50

aroung 300 should be fair for the labor invovled...or do it yourself for 30 bux (cost of the bit) unless u have the bit sitting arround

kevinmfaust

If you dont have a high flow intake you will not get boost creep. There is enough restriction in the stock system to keep down the creep.
Kevin

GoodfellaFD3S

iTrader: (213)

The profec won't control the creep. It's solely a function of increased flow/decreased backpressure and the capability of the stock wastegate to vent the exhaust gases, which isn't very good. With my setup (to include a ported wastegate) I creep to about 14 psi on a cold morning. Give it a try, but keep an eye on the boost...creep can definitely pop your motor...

Street King

BUMP