Printable View
Hey guys, I can't seem to find anyone with a similar problem.
After upping the shift points to what I think is around 6700rpm for each gear at WOT, the car won't shift gears at full throttle. It just stays up at redline. Is there anything in the tune that I'm not seeing?
I figured the Engine/Fuel/Cutoff might be doing it, but I raised that over 6700rpm and it still has the issue. You can see an example in the log at 11 minutes in.
Attachment 95675
Attachment 95676
Hi,
I take a look at your tune. The TCM rpm limit is set at 7200 rpm, and it's upper than your engine rev limit (7000 rpm at maximum, other are 6800 OR 6900 rpm). Your shift patterns are also strange, max rpm I saw is 7745rpm... If you want the car shift again at wot, I think that you should set tcm rpm limit at 6800 rpm and max upshift in shift pattern table at 6800 rpm to.
I never tune ZF8 but NAG1 tuning works like that.
What tables have you modify before your issue?
P.S. : sorry if my English is bad, I'm french, and still Learning your language...lol
If your shift rpm is too close to your rev limiter, it will not shift, you need to give it time to shift.
Thanks for looking at it guys! And your English seems to very good.
I dropped the RPMs down a little from what I thought was 6800 rpm to around 6700 rpm for each shift. But you're saying that my shift patterns are up at 7745? Did I do my math wrong? I thought it was a simple multiplication by the gear ratio of the current gear.
zf8 1= 4.71
2 = 3.14
3= 2.10
4 = 1.67
5 = 1.29
6 = 1.0
7 = 0.84
8 = 0.67
So for first gear, 1443 rpm x 4.71 = 6800 rpm shift point. Is that right?
I figured a few hundred rpm would be a sufficient gap between limits, but maybe I need more?
Quote:
Originally Posted by Hoho
You will need more gap than that in the lower gears.
There are delays (in ms) in the shift software that sequence the clutches.
You can mess with those but it is tricky...its way easier just to command the shift a little earlier.
Ah ok, makes sense!
Thanks for the help everyone.