new to the forum.. quick question about rev limiters

[trollsquadcoupe]

i have a 08 ac 3.5 cvt and i was wondering if there is a way to put a two step on the cvt?

[DJ_B_Easy]

^Why?

[wade001]

Kinda pointless honestly, you have an auto, and its a CVT. that negates the purpose of a two-step which is something used on a manual!

[trollsquadcoupe]

well not even a two step just a limiter. when i do bracket races i race in the manual mode, and the last couple races i was in i missed a gear cause the car shifted at the same time i did. so i just want to solve that problem

[wade001]

How can you miss a gear? its an auto, and its a CVT (which has no gears). Please dont think im being mean but neither a limiter or 2 step will do any good for you, just pay attention to the rpms. A no-step is used with manuals. Nice to hear you race bracket though, what times you run?

[funkee]

It shouldn't be hard to do with an UpRev tune. We've considered removing the rev limiter and auto-upshift altogether in manual mode, but we're not sure how much the CVT can handle. I have a valet mode with a rev limiter set to 1,500RPM and a top speed of 7mph. Boy is it annoying. I don't see why you wouldn't be able to do a 2-step with UpRev, however.

[trollsquadcoupe]

so basically if i get the uprev tune i will be able to do it? i consistently run 14.3 but thats not my best time. how would u go about removing the auto up-shift?

[Hussain]

leaving it in "D" is faster... It's not consistent, but it's faster. leaving it in "D" I ran a 13.9, another 13.9, 14.0, 14.1, 14.2 and I think even a 14.3. all in the same day.

[wade001]

Bracket racing is all about consistency, couldnt care less how fast a car is, if you aren't consistent you wont get anywhere except for the trial runs before eliminations .

[DJ_B_Easy]

^Why?

[funkee]

I'd talk to an UpRev dealer to see what's possible and what's not. There's quite a lot that can be done. http://www.uprev.com/dealers.php

Regardless of the 2-step, a properly tuned UpRev ROM will give you a little bit more power, and a lot more low-end torque which has helped me tremendously with my launches. Here's what we did, and some dyno graphs in result: http://www.zcarblog.com/2012/04/13/perf ... wners.html.

It's a challenge to dyno a CVT, and most tuners won't even bother trying. If you're in Nor Cal, check out Z Car Garage in SJ. They tuned my CVT Altima and mrmurphz' CVT Maxima. The stock air/fuel ratios were completely illogical. The main benefits came from adjusting a/f ratios and cam timing. I've improved my highway fuel efficiency (using cruise control) from ~24mpg to ~30mpg. Serious gains.

I'm going to talk to Rob from ZCar about changing the valet mode, possibly increasing the rev limiter and making a super efficient map for long drives.