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Really starting to get my Megasquirt tune dialed in I think, so figured I'd post a recent datalog of where I am at the moment.  Think I'm going to dial back the decel cut a little bit and richen up a few places in the midrange, but other than that I can't see any spots in need of major tweaking, but I'm open to any comments and suggestions just in case anyone else spots something that I've overlooked!  I probably could run some more advance (no knocking so far), but I'm a little nervous to push it much further.  I'm on regular B&G software so no fancy auto-tune options for now, so yeah any and all comments welcome!  Oh, and the details if needed:

 - 318i manifold

 - 19# Bosch yellow injectors

 - 9.5:1 IE pistons

 - 284 reground cam




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Took a look at it and didn't see anything obvious from the log.  I read somewhere and adopted the idea of tuning the decel by eliminating the cut completely while tuning and look for a nice even mixture on overrun.  Once you've got that settled in, add the decal cut back to lean it out to where you want it.  This can make the overrun-to-power transition more responsive because the MS can stop the fuel cut, even thought you're still in an overrun section of the VE table and can help pull the engine out of that range.  But that's a pretty specific scenario. ;)

Mark DeBernardi


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