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Extreme loss of power at 7100 rpm. Help needed!

what's the last thing you guys messed with? pulley change, retune, etc

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Extreme loss of power at 7100 rpm. Help needed! Extreme loss of power at 7100 rpm. Help needed!
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Old 01-28-2012, 10:55 AM   #1 (permalink)
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what's the last thing you guys messed with? pulley change, retune, etc
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Old 01-28-2012, 11:01 AM   #2 (permalink)
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what's the last thing you guys messed with? pulley change, retune, etc

Updated OP with the kit I have.


This issue occurred when we swapped to the ark exhaust from
Invidia (which was more restrictive). We have also swapped the pulley to a 92 mm one but the sharp decline started once the exhaust was swapped out.
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Old 01-28-2012, 11:04 AM   #3 (permalink)
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Updated OP with the kit I have.


This issue occurred when we swapped to the ark exhaust from
Invidia (which was more restrictive). We have also swapped the pulley to a 92 mm one but the sharp decline started once the exhaust was swapped out.
weird, i swapped my HKS out back to stock without retune and still runs the same.

did you retune it after the pulley change though?
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Old 01-28-2012, 11:11 AM   #4 (permalink)
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weird, i swapped my HKS out back to stock without retune and still runs the same.

did you retune it after the pulley change though?
He did a few changes as far is timing. But this sudden drop of power occurred before pulley swap and it was just after a new exhaust. I don't think the ark is a bad exhaust but I'm think something is just not sitting right in the tune/ecu. Not to mention that coop has one on his TT g37.

We went from 460 whp peak to 340 And then it shows to start building up power again
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