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Header Wrap & Tune

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Old Oct 26, 2013 | 05:25 PM
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Default Header Wrap & Tune
I had my car tuned, open loop, SD dyno, before I wrapped my crossover.

Wrapped the crossover and while I was checking the trans fluid noticed some primaries glowing red, nothing changed between the time before/after wrap, should I have it adjusted tune wise now?
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Old Oct 26, 2013 | 05:44 PM
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The wrap wouldn't affect anything at idle. Did you remove anything to put the wrap on? You could have a vacuum leak.
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Old Oct 26, 2013 | 05:46 PM
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Nope, just un bolted crossover and bolted it back up. Did not notice any difference in vac readings at idle.

Only change really was thats its gotten to be ~40F out and it was tuned at prob mid 60s...
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Old Oct 26, 2013 | 05:53 PM
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No re-tune required.
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Old Oct 26, 2013 | 06:19 PM
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Well crap, hoping it was something simple.

Guess its going back to the tuner.
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Old Oct 26, 2013 | 06:21 PM
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Weird issue that shouldnt happen with just a header wrap. Hmm.
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Old Oct 26, 2013 | 06:26 PM
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Only other change was tossing in a 200amp alternator vs the stocker. So much better voltage at hot idle now, but that shouldn't effect things.

Edit: I am an idiot. Tune was done on crappy alternator and the injector vs voltage offset is probably all sorts of F'd up now.
Last edited by Shownomercy; Oct 26, 2013 at 06:53 PM.
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Old Oct 26, 2013 | 08:30 PM
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Originally Posted by Shownomercy

Edit: I am an idiot. Tune was done on crappy alternator and the injector vs voltage offset is probably all sorts of F'd up now.
Bingo. May not be that table exactly but diff voltage can effect all sorts of things.
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Old Oct 26, 2013 | 08:35 PM
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Enough to cause glowing header primaries is the question though, wish I knew how to tune things
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Old Oct 26, 2013 | 09:41 PM
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Can you put the old alt back on?
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Old Oct 26, 2013 | 09:43 PM
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Originally Posted by sbcgenII
Can you put the old alt back on?
I can try, gonna first get in contact with the tuner and go from there. Just sucks to install the alternator, gotta swap pulleys back etc.
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