It seems that my car runs stronger when building boost or maybe 3/4 throttle. Seems that if I floor it off the line it pulls back a little and then picks up. I’ve put a bigger turbo in it this past spring (precision 5858) but not really any other additions. It runs fantastic it just feels like it has more power when I am not flooring it. It only has 24k on it. Maybe need to do a new tune with turbo tweak. What are your thoughts?! Thank you in advance.
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TTA855
White lightning drinker
Based on my experience, it sounds like your knock sensor is being triggered and retarding spark advance. Are you the original owner? If not, there's no way to know what the PO did to your chip without pulling it and reading it. You need to know what your ignition timing is. One quick and easy way to check is to put a can of Boostane in your gas tank, or better yet, 100 octane unleaded race gas. If that fixes it, then you know your timing is too advanced, and then you can do things like get a new chip from TurboTweak, and a ScanMaster to monitor your knock sensor for pinging. Since you installed a bigger turbo, you probably also need to upgrade your fuel system, with bigger injectors and a stronger fuel pump.
I have a scanmaster and upgraded fuel system with Hotwire from previous owner. Only #36 injectors though. I don’t always show knock but will try the boost and. I have a can at home. Let’s see if higher octane make a difference with any knock at all.
