Racelogic Traction Control

phunk

What is important, i believe (im not a transmission expert) in the quick-shift is that power is momentarily cut. For me, that is happening when I hit the factory rev limiter. I dont try to hit the limiter before I begin the shift, but when I push the clutch in the engine flys to the limiter because I am still at full throttle, hits the limiter, and this factory cut is my moment to perform the shift and drop the clutch.

my slower shifts, if you watch the vids, you can tell what happened was that I accidentally hit the limiter before initiating the shift, screwing up my whole timing.

I would suspect, tell me if I am wrong, that the reason you felt the difference with your no-lift shift module is possibly because you were not no-lift shifting until you had the module. Am I right? Because trying to shift at that engine speed without being on the down-slope of a cut, it doesnt really want to shift fast and it will grind if i release the clutch too soon in the process. What I am basically saying is, I feel like my transmission lets me shift it faster if i bang the rev limiter, than it will if I try and slam a gear hard without hitting the limiter... and I dont think it would let me into the next gear as quickly if I didnt keep the throttle down so that I tap the limiter.

Perhaps its time for me to study my transmission a little bit more.

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victorofhavoc

I did it a few times in my wrx before actually having the ecu tuned for no-lift (on the wrx they call it flat foot shifting)...basically I could feel the transmission jerk quite hard, and twice the driveshaft actually slipped! It scared the piss out of me the first time it happened...

with the flat-foot programmed in the engine would quite rapidly drop back down to the appropriate rpm as fast as i was on and off the clutch so that the next gear lunged me forward rather than feeling like i ripped something apart.

Then again with AWD there are a lot more moving pieces and there's less room for error/slop between shifts. Get it wrong and you'll feel the clunk and chunk of all four wheels, get it right and you'll feel all the wheels grip

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Had a 2010 WRX- boy was it quick in a straight line, got a 2014 Z- man is she grippy in the corners-- then left the Z and later got a GTI, now back in an 09 racecar Z!

Mitco39

I think your onto something there. Shifting once you just tap the rev limiter takes all the stress away from the drivetrain and gives you a nice window to shift in. I personally run the Racelogic for day to day driving because A. it sounds awesome, and B it does work very well. Launcing with it I still have not perfected and to be honest I only do it for the sound, lol. It does manage to build 2-4psi of boost though. Although as we know with this car traction is already an issue and boost at 0mph is sorta useless. lol

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