Quote:
Originally Posted by thez99
Im curious as to why mods like cats, etc. would cause performance LOSS with a tune??
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because they may be targeting a certain AFR for max performance, by adding breather mods, like exhaust and DPs you may lean it out too much and it may not adapt properly
not sure how this is affected by the oem ecu trying to adjust
just a thought
The AP has a potential to be great, the numbers look ok. If the actual gains are w/ in 40-60 rwhp think this will be a great success, specially if it can be removed w/ out a trace for dealer service or warranty work