Let's talk Exhaust!

[doubleurx]

Originally Posted by MikeSTI

thats what you get for being older.....
..........us young kids lost our hearing long ago with amped up audio systems

Eh? what's that you say sonny?

[MattR]

Screw that, I'm getting the resonator,,,I have a stock stereo

[Dean]

Originally Posted by doubleurx

By the way, no boost creep so far with only EM.

I'm not saying EM won't do it, but if why not be safe. Also, you don't drive at sea level much.

[sperry]

Originally Posted by Dean

I'm not saying EM won't do it, but if why not be safe. Also, you don't drive at sea level much.

Well porting the waste-gate will certainly kick you out of ESP. Modifying your turbo's a big no-no.

[Dean]

Originally Posted by sperry

Well porting the waste-gate will certainly kick you out of ESP. Modifying your turbo's a big no-no.

Um, so does EM that effects the wastgate...

[sperry]

Originally Posted by Dean

Um, so does EM that effects the wastgate...

Engine management is legal, as long as you don't change the boost map. Physically removing material from the turbo is illegal.

[MikeK]

Originally Posted by MattR

STX/U-
No Boost Mods
Cat required
No I/C Hoses.

Haha I was illegal half the season. I'm really glad I didn't beat tyson now

[Dean]

Originally Posted by sperry

Engine management is legal, as long as you don't change the boost map. Physically removing material from the turbo is illegal.

Anything affecting boost, including boost map or wastegate duty cycle changes are prohibited. The later is what Nate is tweeking to avoid creep I believe. I don't beleive you can avoid creep with timing and fuel only which is what you are legally limited to.

[sperry]

Originally Posted by Dean

Anything affecting boost, includig boost map. or wastegate duty cycle changes are prohibited. The later is what Nate is tweeking to avoid creap I believe. I don't beleive you can avoid creep with timing and fuel only which is what you are legally limited to.

Um, isn't that what I said?

"Engine management is legal, as long as you don't change the boost map."

I never mentioned whether or not that means you'll be able to fight boost creep w/ EM. If that requires changing the boost, then you won't be able to fight boost creep with EM changes.

'Course, as we've discussed before, boost creep is a mechanical problem! If the WG duty cycle is at 100%, and the car is still building boost no amount of EM changes are going to make a difference. The stock ECU can already open the WG all the way, so how is a remap going to completely solve the issue? Perhaps some tweaking might help in some cases, but at the root of the problem is the physical design of the turbo.

So, if you plan to race in ESP, without a cat, chances are you will boost creep. Leave a cat in, or come on over to SM where you can port the wastegate, and run a better boost map.

[MattR]

Originally Posted by sperry

So, if you plan to race in ESP, without a cat, chances are you will boost creep. Leave a cat in, or come on over to SM where you can port the wastegate, and run a better boost map.

Yep. we'll find out in about 4 months. I'm aware of the issues.

[Dean]

Scott, that was my point, they were talking about catless exhaust, and Nate claims to have an EM based solution to avoid creep on a catless STI, but I don't think he can do it with timing and fuel alone, thus something affecting boost has to change which is illegal in SP, and STU. So if you have to touch boost, you end up in SM, so why not port the wastegate and fix the real problem....

[Dean]

There is actualy a good page on the Vishnu site that lists all the changable things with the ECUTek, and any of them that have "boost", "wastegate", and probably "duty" in the name or description would technically be illegal to touch in ST*.