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Old Oct 2, 2011 | 08:15 PM
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Default Supercharged Ls2
Will adding headers to my supercharged Corvette decrease the boost?
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Old Oct 2, 2011 | 08:19 PM
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Old Oct 2, 2011 | 08:27 PM
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Old Oct 2, 2011 | 08:53 PM
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Hmmm....
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Old Oct 4, 2011 | 12:31 PM
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And then typically a smaller pulley is put in to bring the boost back correct?
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Old Oct 4, 2011 | 02:15 PM
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It will lower the boost by creating a more efficient air pump... you will gain power, even at the "lower" boost level... so don't be fooled into believing that you will lose power.......
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Old Oct 4, 2011 | 03:29 PM
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Originally Posted by Corvette6.0
Will adding headers to my supercharged Corvette decrease the boost?
I asked that same question before I added headers to my A&A equipped '07 LS2. I was getting 10 psi with the standard 3.8" pulley and wanted to try and bring it down a couple of pounds. I bought a set of ARH long tubes with hi-flo cats and put it back on the same dyno to retune it for the headers. The same dyno indicated the same 10 psi boost that I had prior to the header installation. I did pick up 18 rwhp with the headers (now 530 rwhp) but was disappointed that the boost numbers didn't drop any. My tuner has reduced the timing (something like 10 degrees at WOT) to prevent detonation on 91 octane gas (no meth). It seems to be working as I have made quite a few 1/4 mile passes and a few standing mile runs and the motor seems to be happy. YMMV
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Old Oct 4, 2011 | 05:16 PM
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Originally Posted by Boat Racer
I asked that same question before I added headers to my A&A equipped '07 LS2. I was getting 10 psi with the standard 3.8" pulley and wanted to try and bring it down a couple of pounds. I bought a set of ARH long tubes with hi-flo cats and put it back on the same dyno to retune it for the headers. The same dyno indicated the same 10 psi boost that I had prior to the header installation. I did pick up 18 rwhp with the headers (now 530 rwhp) but was disappointed that the boost numbers didn't drop any. My tuner has reduced the timing (something like 10 degrees at WOT) to prevent detonation on 91 octane gas (no meth). It seems to be working as I have made quite a few 1/4 mile passes and a few standing mile runs and the motor seems to be happy. YMMV
WHAT? You want less?
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Old Oct 4, 2011 | 06:48 PM
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Originally Posted by Elite275
And then typically a smaller pulley is put in to bring the boost back correct?
If you want more power but if your goal is to keep the boost at a minimum for reliability, then no.

This was exactly my approach.
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