Pushing The Stock Turbo
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Originally Posted by TII777' date='Apr 21 2004, 08:41 PM
I didnt know you could safely run over 12psi on stock ic and fuel
so what's up is this a conspiracy or something? nobody has any others thoughts or experience on these topics?
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From: Louisville KY 40299
Originally Posted by BigTurbo74' date='Apr 21 2004, 01:21 PM
so since you had supporting mods to compensate for the creep, did you bother porting your wastegate?
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From: Louisville KY 40299
Originally Posted by Lionheart240' date='Apr 21 2004, 11:41 PM
Someone read my signature of mods, and tell me how much boost that I can run safely. With no boost controller it's pushing 3 1/2 psi.. -_-
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From: VA
Originally Posted by BigTurbo74' date='Apr 21 2004, 01:36 PM
and what about this? like you were saying you dump boost like when you shift? TII777 i think is still having this problem among many others, but is that normal for the stock wastegate setup to dump a ton of power up high? did you/can you, do anything to remedy it?
My stock S4 turbo had no trouble pushing 8 psi through the stock intercooler, and it certainly didn't fall off at high rpms. Now that I'm running the hybrid, I'm running about 10 psi (limited by a manual boost controller). Again, no problem with boost falling off.
If you feel like the stock wastegate is "dumping a ton of power up high", that's exactly what it was designed to do! Get a boost controller!
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From: VA
To address the original question, I won't run over 12 psi on my current setup, which is stock ECU and injectors with an upgraded turbo and fuel pump. It will be interesting to see how much quicker she is in the quarter going from 10 to 12 psi.
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From: Culpeper, VA
I used to run 15 psi on the stock S4. Just driving around, it would be awesome. Its when you stop and sit that hurts the TMIC. A nicely designed cold air intake and box helps cool it quicker and get lower temps in to the IC. I had 2 fuel pumps with the stock injectors and a SAFC. It flew. But the stock turbos are inefficient compared to a higher end turbos. Our turbos werent entended for alot of boost so they werent designed for it. You can do it, you just need to cool the charge a little bit better.
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From: Peoria, AZ
Originally Posted by 1988RedT2' date='Apr 22 2004, 07:15 AM
I'm a little confused by this thread. The stock setup will open the wastegate at anything over 5 or 6 psi on an S4, 7 or 8 on an S5 (I think). That's assuming you don't have a boost controller. If you have no boost controller, then you are simply fighting the stock wastegate while it's trying to do its job.
My stock S4 turbo had no trouble pushing 8 psi through the stock intercooler, and it certainly didn't fall off at high rpms. Now that I'm running the hybrid, I'm running about 10 psi (limited by a manual boost controller). Again, no problem with boost falling off.
If you feel like the stock wastegate is "dumping a ton of power up high", that's exactly what it was designed to do! Get a boost controller!
My stock S4 turbo had no trouble pushing 8 psi through the stock intercooler, and it certainly didn't fall off at high rpms. Now that I'm running the hybrid, I'm running about 10 psi (limited by a manual boost controller). Again, no problem with boost falling off.
If you feel like the stock wastegate is "dumping a ton of power up high", that's exactly what it was designed to do! Get a boost controller!
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Originally Posted by roadkill669' date='Apr 22 2004, 08:22 AM
You can do it, you just need to cool the charge a little bit better.