ok whell after i get the boost controller installed im planning on getting a mp, i know the exhuast will get louder.. and will it change pitch? i mean i like the way the car sounds now but wouldnt mind the same sound but a little louder.. i dont want a ricer sound tho nothing like a civic would sound like.. sooo some info would be nice..

 

Mine Got STUPID loud...i had to install a Race muffler in it (borla bullet style)....i have 3"dp and PFS catback.

 

It will be much louder and will be higher pitched/raspier. Get a resonated midpipe.

Be prepared for boost creep, which a boost controller won't be able to control.

 

i dont mind it getting louder just if its a stupid sound i wont want to get it.. wont a resonated mp act like a silencer and get like no noise???..

 

its not a stupid sound....we just say stupid around here as an expression...the Resonated MP will still be louder than stock cats with ease.

 

Resonated will still be louder but not as bad as unresonated. What kind of catback do you have?

Also, heed Rynberg's warning of boost spike. You're looking at spikes up to 14-15psi during transition. Your boost controller won't do anything to stop that. Stock Ecu= Motor go POP!

 

Well, actually the boost controller should control spiking just fine...it's the creep that will likely occur after the transition that's the problem.

 

And from what I understand, it will stink too. But nothing like a civic would smell like.

 

Touche' Rynberg. That's what I was thinking but typed something else.

 

It will smell, it will be louder. If you will run a midpipe, I hope you have an EMS, injectors, and someone to tune it.

 

does the FD have a fuel cut in the ecu once you creep past a certain psi? my sti would cut fuel at 17.5 psi just wondering.

 

The stock ECU does. I think a PFC has an adjustable cut setting.

But still, you really don't want to run your car to fuel cut.

Dave

 

ok i know it will creep thats why i set my boost a lil lower.... so what kinda res mp would you guys recomend... iv seen lots of diff ones

 

Again, setting your boost lower on the boost controller will not prevent creep. Running higher than stock boost levels while adding more airflow with an open exhaust is a big no-no on the stock ECU. I suggest in the least a re-flashed ECU such as the Pettit if you wish to continue on this course. Otherwise your other 2 options are porting the wastegate or popping your motor.

 

If you run a mid-pipe, you have only two real options to stop boost creep. Neither an ECU nor a boost controller work. (A richly tuned ecu will give you more margin against a Bad Thing, but it won't stop it).

1) Port the wastegate. The wastegate opening is the problem when you flow this much air. No electronic gadget, boost setting, or tuning will make this hole in the iron housing pass more air. Only a bigger hole.

2) Put restriction back in the system. I think it's silly to run a midpipe if you don't make the supporting adjustments (see option 1) for it. To go midpipe because it's $100 cheaper than a cat is false economy. Just choose a high-flow cat and get 9/10ths of the power gain, and be more considerate w.r.t. noise and stench, and less worry about the boost going haywire.

Dave

 

I recently had a similar conversation via PMs with a local forum member. He also seemed to confuse Boost Spike with Boost Creep . I hope you both re-think the mid-pipe thing. It seems easy to just unbolt that cat and put a section of pipe in there, until you realize all the collateral expense to do it correctly (safely).

 

prob gonna go with n hks high flow or something

 

Dave, you have more patience than I

For the LAST time.

CREEP happens when you have exhaust flow that overwhlems the stock wastegate. As rpm increases boost increases.

A boost controller will not do a DAMN thing for boost creep, as it simply CONTROLS boost, not limits it.

A ported wastegate will allow your system to vent enough exhaust energy away from your turbine to keep your boost creep in check.

The only other option is a more restrictive exhaust to keep creep in check.

That's it, boys and girls. Class is over

 

I have had to explain boost creep more than once to people but sometimes the only way they get it is from experiencing it themselves. Some people just refuse to take good advice when given.

 

Lol. I was extremely drunk on redbull/vodka when i typed that. When sober I typically pass up the 'boost problem' posts

 

i understand about the creep.. thats why if u set the boost a lil lower you will get creep but not like a high boost creep

 

whell i dont care anymore i know what im gonna do

 

*Edit* Actually...you know what? Nevermind. Good luck to you.

 

No. You don't.
Did you read ANYTHING in this thread?

Don't forget to post prices when you part the car out.

 

Here's an example for you:

You have your boost set for 14 psi, and you are creeping to 15 psi.

Now you go and set your boost for 7 psi, but you will still creep to 15 psi.