[Digitalfiend]

Originally Posted by GilMikalian

Mine may be a unique situation (Cali 91 Oct.) BUT when I plopped in my Cobb catted DP into my '08 with Stage 2 OTS map for Cali, my tuner said it is so dialed in that he would be able to extract MAYBE another 5 horses. The tuner, btw, was Dan Harman, so not some newcomer learning his way around.

Again, my situation may be unique because I understand that there are vehicle to vehicle differences and the big difference being the fuel you and I use but just be aware that at least one of the OTS maps made a pro-tune redundant.

I think my situation varied because I didn't go with a Cobb TBE and, let's face it, most people don't. I bought a Crucial Racing shorty DP and a MadDad midpipe + whisper catback (great exhaust btw.) I only made +13whp or something over stock with the OTS map and my boost wasn't smooth up top. Getting a Protune was a night and day difference. I plan to do the same thing with my '08.

[xcritic]

Dont forget there is a higher chance of experiencing boost creep when running catless dp also.

[GilMikalian]

Originally Posted by xcritic

Dont forget there is a higher chance of experiencing boost creep when running catless dp also.

True, but going catless dictates that you go with a pro-tune anyway, which SHOULD alleviate any such issue.

[Digitalfiend]

Originally Posted by GilMikalian

True, but going catless dictates that you go with a pro-tune anyway, which SHOULD alleviate any such issue.

My understanding is that since boost creep is a mechanical issue, it isn't something that you can easily tune out without affecting power (if at all). If the wastegate is fully open, then there isn't much you can do to alleviate creep. That's my understanding.

[SonicBoom]

For me the pro-tune numbers don't really tell the tale...
OTS: 281whp/317tq
Protune: 290whp/334tq

The tuner said I was on the edge of safety on all levels with the OTS map.. I was making good power, in an ugly way. So now I'm making slightly better power cleanly. Driveability is much better, boost kicks in a little earlier and every gear pulls much smoother.. I love it!

[Blip]

What is boost creep and can it be tuned out. When I had an A4 1.8t making over 300Hp I was requested to get an oil catch can do I need one for the STI.

[Digitalfiend]

Originally Posted by Blip

What is boost creep and can it be tuned out. When I had an A4 1.8t making over 300Hp I was requested to get an oil catch can do I need one for the STI.

Boost creep is when the turbo's wastegate can't relieve enough exhaust to control how fast the turbo is spinning. This causes the turbo to spin faster and faster, thereby generating more and more boost, past what the boost target is set to. This ultimately leads to the car hitting fuel-cut (safety feature) and generates a CEL.

From my understanding, boost creep is not something that you can really tune out as it is a mechanical issue. If the wastegate is completely open then there really isn't much more you can do programmatically.

[Johnny V]

An oil catch can is never really a bad idea if its installed correctly. Keeps oil out of where oil shouldn't be.

[rabbisti397]

I like catless so I can run high octane leaded fuel.

[HRCboy]

if u don't plan to get a protune stick with a Cobb catted DP. If u want as much power u can get go catless with protune and port your wastgate to avoid boost creap. If willing to spend money on stoptechs for marginal performance gains then why would u not get a protune? IMHO I would of done a protune before changing the brake caliper.

[GilMikalian]

Originally Posted by SonicBoom

For me the pro-tune numbers don't really tell the tale...
OTS: 281whp/317tq
Protune: 290whp/334tq

The tuner said I was on the edge of safety on all levels with the OTS map.. I was making good power, in an ugly way. So now I'm making slightly better power cleanly. Driveability is much better, boost kicks in a little earlier and every gear pulls much smoother.. I love it!

See, that's EXACTLY what I wanted to accomplish when I went in for a Pro-tune, but the OTS map proved to be safe and wringing 99% of the available power from my setup so no need in my case.

[the ambush]

Originally Posted by Devil2holla

is this true, getting a catted dp will be louder and flames.

it`s the other way around: catless = louder + flames cobb catless
so no brutal accelerations before cops,
i love mine

[twigg107]

Originally Posted by Digitalfiend

Boost creep is when the turbo's wastegate can't relieve enough exhaust to control how fast the turbo is spinning. This causes the turbo to spin faster and faster, thereby generating more and more boost, past what the boost target is set to. This ultimately leads to the car hitting fuel-cut (safety feature) and generates a CEL.

From my understanding, boost creep is not something that you can really tune out as it is a mechanical issue. If the wastegate is completely open then there really isn't much more you can do programmatically.

I believe you can tune it out to a certain extent. Stage 2 catless shouldnt be a problem but the more mod's you add will push it further past the point where it will become a problem (IE. headers, up-pipe, meth.... ect.). Now I am not a tuner so dont quote me on this, I think remember rallysport said you can tune it out.

[Digitalfiend]

Originally Posted by twigg107

I believe you can tune it out to a certain extent. Stage 2 catless shouldnt be a problem but the more mod's you add will push it further past the point where it will become a problem (IE. headers, up-pipe, meth.... ect.). Now I am not a tuner so dont quote me on this, I think remember rallysport said you can tune it out.

I would love to hear an explanation from a tuner on how to stop that by tuning. You might be able to minimize the effect, but I'm not sure you can tune it out.

[the ambush]

Originally Posted by Digitalfiend

I would love to hear an explanation from a tuner on how to stop that by tuning. You might be able to minimize the effect, but I'm not sure you can tune it out.

fuel cut sooner maybe