Racelogic Traction Control

Chuck33079

No ****? Wow. I'd love to see an analysis and see what weight it's sheared down to after the abuse you put it through.

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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

phunk

my diff and trans fluids and coolant are factory fill, but my oil has been changed every so often

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victorofhavoc

Oh I see what you're saying now. Well From my experience with it on a boosted engine, not the Z's, it has always fallen as fast, if not a tad faster, than the time it has taken me to push in the clutch shift to the next gear and release the clutch. Especially on 2-3 4-5 shifts. I may not be as fast as a DSG auto, but the .5 sec it takes me to shift is enough time for RPMs to fall enough to where it matters. And of course peak range for torque is more efficient this way.

EDIT: I'm sure a lightweight flywheel would also help it fall faster, when it's not holding the same intertia

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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!

phunk

whats it cost to do? ill send some out? i planned to change the trans fluid this winter LOL

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phunk

peak torque and turbo efficiency and all that have nothing to do with it... gearing is gearing, and once the clutch is re-engaged the engine speed will match the wheel speed per the selected ratios and thats what you have to work with. the most a wot-box can do is help keep a big turbo spinning faster by burning the fuel in the exhaust mani, but we dont need that, turbos on Z's arent laggy anyway and the car has enough natural power to propel itself quickly even if it did loose boost for a split second.

my car has a twin disk clutch and light flywheel... it still isnt gonna fall quick enough that i want to wait for it!

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victorofhavoc

Haha, fair enough. The whole process is more useful on 4cyl cars by far, and especially for awd where gear to engine speed management is important to not break things. If you're not spinning you wheels every shift, not experiencing an absurd shock, and shifting before your rev limiter you're most likely good to go anyway

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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!

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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Chuck33079

Blackstone Labs

$25 or so.

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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

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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2007 Chevy Duramax - EFILive Tuned By Me
2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me
The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her
My Build --> http://www.the370z.com/members-370z-...39s-build.html

phunk

I played with using map switching in the UpRev for a 2-step, and it didnt work out... but I need to double check my settings.

What I did was copy over my map to the second position, then just pull a bunch of timing out and set a rev limiter at 4500 to start. Then I would go to that map, and do the sequence to switch back to the first map, only keep holding the button down because it doesnt make the change until you let the button up.

While sitting there holding it, i would also build some boost and it seemed to work well, cept when I performed the launch, as soon as I got up to somewhere around 60mph, the car hit a momentary speed limiter... and i had to let off then get back on it to get past it.

Was confusing me... but thinking back i believe i put that speed limiter there in the 2nd map pretending it was liek a valet mode, and perhaps for some reason the speed limiter takes a few seconds to switch? wierd either way... thus i didnt make any attempts with it at the track.

BTW I am not against RaceLogic, I have used it in other cars and like it a lot. I was just arguing about needing it for the no-lift shifting stuff.

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Limeybastard

From St Pete, says it all... {JK}

Welcome to the forum.

victorofhavoc

the way it worked on my car was through an ecu mod for the actual code level. While below 10km/h and clutch in the rev limit was 4500 rpm. while above 10km/h and clutch in the rev limit was 5500 rpm...clutch out there was obviously no limit. Not sure if you can set up something like that...

If you want to PM me, I might be able to look at it code level and figure out what might work on this ecu compared to my old ecu. Coding is still coding, and that's partly my profession. Who knows, could find a whole new way of doing things...

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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

If you know IDA and your way around a BIN file there is a large potential to make some $$ with these cars. Everyone has been promised all these features by ECUTEK with 0 to show for it. But if you have the skills to get into it that level (I started to, but to be honest I just dont have the time) then there is a large service that you could offer.

As far as adding these features through existing tuning platforms its just not going to happen, not soon anyways. Ive tried to get a stock dump file out of my ECU awhile back without much success, albeit I didn't spend all that much time on it.

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2007 Chevy Duramax - EFILive Tuned By Me
2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me
The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her
My Build --> http://www.the370z.com/members-370z-...39s-build.html

phunk

I use the UpRev software and there is no 2-step option, that is why I tried using the map switching for it. You would want to talk to UpRev about it if you know how to add functions to the stock ECU.

For me personally, its not a big deal. I only race the clock when I am at the track, so the R/T doesnt matter to me. I will sit there on the green until I am happy with where my RPM is and then launch. On the street, the Z does not hook well enough to do anything other than roll out and mash the gas. If the software I already had could be made to do with with the map switching technique, then sure why not... thus I tried. Others have had it work for them so I am going to eliminate the speed limiter in my second map and try it again next time and it should work for me.

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