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Stillen HFC vs. BERK HFC

Originally Posted by RCZ I for one, have found a different fix to this problem....I think I'm going with race pipes. Plug the bungs and run O2 sims?

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Stillen HFC vs. BERK HFC Stillen HFC vs. BERK HFC
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Old 04-14-2009, 09:56 PM   #1 (permalink)
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Originally Posted by RCZ View Post
I for one, have found a different fix to this problem....I think I'm going with race pipes.
Plug the bungs and run O2 sims?
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Old 04-14-2009, 09:57 PM   #2 (permalink)
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Plug the bungs and run O2 sims?
No can do.. the rear O2 sensors control fuel trims..

EDIT: I should clarify.. secondary fuel trims associated with CELs..
Last edited by Josh@STILLEN; 04-14-2009 at 11:04 PM.
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Old 04-14-2009, 10:30 PM   #3 (permalink)
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No can do.. the rear O2 sensors control fuel trims..
Really? I figured that's why they had 4: the front ones to control the mix and the rear ones for emissions crap that doesn't really matter.
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Old 04-15-2009, 08:04 AM   #4 (permalink)
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Really? I figured that's why they had 4: the front ones to control the mix and the rear ones for emissions crap that doesn't really matter.
Per UPREV this is correct. The rear ones only verify the cats are working and that is all. The car runs no different and these can be turned off in the ECU tuning.
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Old 07-21-2009, 08:45 PM   #5 (permalink)
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Does triggering a code damage the engine or affect performance? I plan on installing a HFC, but I hate to deal with all the potential issues mentioned in this thread
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Old 07-22-2009, 07:46 AM   #6 (permalink)
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Does triggering a code damage the engine or affect performance? I plan on installing a HFC, but I hate to deal with all the potential issues mentioned in this thread
No, it doesn't.
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Old 07-22-2009, 07:50 AM   #7 (permalink)
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No, it doesn't.
Another question - I have an automatic transmission and wondered if adding power will potentially damage it. How much Hp is too much for the A/T?
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