2 Step tuning with Uprev

b1adesofcha0s · 09-07-2012, 12:18 PM

Interesting. If this works for 7AT's, then it could be very helpful at the drag strip. I just need an Uprev tune first

BigT · 09-07-2012, 12:18 PM

That sucks that you have to do all of that. Tell uprev to write new code so it has a secondary limiter that only works when there is no movement of the speed sensor. (car is still) Once the car moves, the standard limiter is on. Thats how I and all of the Evo guys did it with stock ECU tuning.

wstar · 09-07-2012, 02:47 PM

UpRev's just patching into the car's existing code and putting some flash variables into RAM for map-switching, it's not like they rewrote the ECU from scratch. There's probably limits on what sort of functionality they can enable

. It could well be that my issues with slow switching have more to do the MPH limits than RPM limits, and that it would work fine with an RPM-limit-only map.

indyn · 09-18-2012, 12:22 PM

Just an idea..
Instead of doing swithching from one map to another.
Why not have one of the tuned maps on Uprev just for the launch that can be used at a dragstrip. Just for this map, set the Idle rpm to 2k or 3k. Hold brake down and launch.

wstar · 09-18-2012, 03:55 PM

I'm not sure if that would work, but you're welcome to try

. The idle might not be stable that high or something (idle air volume learning, etc?), if it can even be set that high. Highest I ever set mine (for cold idle) was about 1,200. That was back when I thought I needed it with my current breathing + tune, but it turns out my problems laid elsewhere (I had a disconnected PCV line leaking open air into the intakes affecting idle, and it wasn't me that left it off :/). IIRC last time I set mine up I'm around 700-750 hot out to around 950 cold?

indyn · 09-19-2012, 11:06 AM

Quote:

Originally Posted by wstar

I'm not sure if that would work, but you're welcome to try

. The idle might not be stable that high or something (idle air volume learning, etc?), if it can even be set that high. Highest I ever set mine (for cold idle) was about 1,200. That was back when I thought I needed it with my current breathing + tune, but it turns out my problems laid elsewhere (I had a disconnected PCV line leaking open air into the intakes affecting idle, and it wasn't me that left it off :/). IIRC last time I set mine up I'm around 700-750 hot out to around 950 cold?

will try if I get a tuner version.
well the difference between the method I suggested is that theoretically there shouldn't be a bog or launch delay.
Isn't launch control in other cars done the same way?

wstar · 09-19-2012, 12:50 PM

Not exactly. Cars with actual Launch Control don't think they're idling

b1adesofcha0s · 09-19-2012, 01:02 PM

And the launch control software also actively monitors and controls traction as well.

Dante2009 · 10-16-2016, 08:19 PM

So my rev limiter is set at 3.2k but I feel like that's very high does anybody know how to bring the rev limiter down?

seymore4 · 10-16-2016, 08:23 PM

Quote:

Originally Posted by Dante2009

So my rev limiter is set at 3.2k but I feel like that's very high does anybody know how to bring the rev limiter down?

Once the 2 step is engaged you should be able to raise or lower the RPM limit in real time by clicking the cruise button up or down, or we can change the default RPM in the tune.

09-07-2012, 12:18 PM	#16 (permalink)
b1adesofcha0s A True Z Fanatic Join Date: Jan 2011 Location: MD Posts: 40,963 Drives: HypeTrain Choo Choo! Rep Power: 141	Interesting. If this works for 7AT's, then it could be very helpful at the drag strip. I just need an Uprev tune first __________________ Project: b1adeZmobile (2009 370Z) \| Uprev Tune by AAM Competition \| Berk Exhaust Project: b1adeZmobile 2.0 (2014 C7 Z51) \| Corsa Xtreme Exhaust

09-07-2012, 02:47 PM	#18 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3594	UpRev's just patching into the car's existing code and putting some flash variables into RAM for map-switching, it's not like they rewrote the ECU from scratch. There's probably limits on what sort of functionality they can enable . It could well be that my issues with slow switching have more to do the MPH limits than RPM limits, and that it would work fine with an RPM-limit-only map. __________________ 7AT Track Car! Journal thread / Car setup details

09-18-2012, 03:55 PM	#20 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3594	I'm not sure if that would work, but you're welcome to try . The idle might not be stable that high or something (idle air volume learning, etc?), if it can even be set that high. Highest I ever set mine (for cold idle) was about 1,200. That was back when I thought I needed it with my current breathing + tune, but it turns out my problems laid elsewhere (I had a disconnected PCV line leaking open air into the intakes affecting idle, and it wasn't me that left it off :/). IIRC last time I set mine up I'm around 700-750 hot out to around 950 cold? __________________ 7AT Track Car! Journal thread / Car setup details Last edited by wstar; 09-18-2012 at 03:57 PM.

09-19-2012, 12:50 PM	#22 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3594	Not exactly. Cars with actual Launch Control don't think they're idling __________________ 7AT Track Car! Journal thread / Car setup details

09-19-2012, 01:02 PM	#23 (permalink)
b1adesofcha0s A True Z Fanatic Join Date: Jan 2011 Location: MD Posts: 40,963 Drives: HypeTrain Choo Choo! Rep Power: 141	And the launch control software also actively monitors and controls traction as well. __________________ Project: b1adeZmobile (2009 370Z) \| Uprev Tune by AAM Competition \| Berk Exhaust Project: b1adeZmobile 2.0 (2014 C7 Z51) \| Corsa Xtreme Exhaust

09-07-2012, 12:18 PM	#17 (permalink)
BigT Enthusiast Member Join Date: Jan 2012 Location: NJ Posts: 469 Drives: 98 2g DSM Rep Power: 13	That sucks that you have to do all of that. Tell uprev to write new code so it has a secondary limiter that only works when there is no movement of the speed sensor. (car is still) Once the car moves, the standard limiter is on. Thats how I and all of the Evo guys did it with stock ECU tuning.

09-18-2012, 12:22 PM	#19 (permalink)
indyn Base Member Join Date: Apr 2011 Location: farr north Posts: 241 Drives: 11 BMW 335i 6AT Rep Power: 14	Just an idea.. Instead of doing swithching from one map to another. Why not have one of the tuned maps on Uprev just for the launch that can be used at a dragstrip. Just for this map, set the Idle rpm to 2k or 3k. Hold brake down and launch.

10-16-2016, 08:19 PM	#24 (permalink)
Dante2009 Base Member Join Date: Jan 2016 Location: Georgia Posts: 36 Drives: 09 Nissan 370Z Rep Power: 9	So my rev limiter is set at 3.2k but I feel like that's very high does anybody know how to bring the rev limiter down?

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