I’ve been playing with tuning since FM6, but really got more into it in FM7. Learning what I can on my own, investigating tuning calculators, using their output and fine tuning to educate myself on how to get tunes where I want them. I’ve come a very long way in that goal, but there is one problem I’ve noted on a few cars over the months, and so far I’ve been unable to tune it out. I’m certainly willing to believe the problem is my driving, but nothing I’ve tried has really worked well.
Basically, the cars work well except for exit on sharp/slow turns. Just at the point where the rear end should come around a bit on throttle, instead it almost feels like it binds up. And it takes a good part of a second to recover and get on it’s way. Of course this kills my times, and relegates those cars to the “I don’t like it” pile. Now that I’ve finished the carrier mode, and still no sign of improved online experience, I’ve gone back to try to figure it out, and still fail.
The current car in question is the Viper SRT10 FE, mostly tuning and fooling around on Sebring Club. After all, might as well get some extra credits while fooling with it.
I’m guessing the root of the problem is low power at lower rpms. The curve shown in engine upgrades doesn’t really look like I would expect of a V10. Where is all the low torque? Anyway, it’s far from the only car with a curve like that, and at least some of those I don’t have trouble with. Along that line I’ve fooled with gearing a lot. A wide range of final drives with gearing right to keep the engine in it’s peak range with minimal shifts. Even going so low that 1st is just a momentary condition, once it lights anyway, followed by instants second, which is now so low it should almost eliminate the need for first gear. And still it bogs down out of a hard slow turn before near instantly hitting the rev limiter.
To increase exit oversteer, one thing would normally be rear diff accel tightened up (higher numbers). But I’ve gone as high as 80s and still the problem remains. I’ve never had to go near that value before, maybe I just need to go further?
I’ve experimented with several tuning calculators, and their various custom tuning adjustments, nothing really seems to help. The best I’ve managed is increasing the spring rates quite a lot, mostly in the back. Also stiffer rear anti-sway since the chase cam seems to show the body roll significantly when this happens. And dampers, including rear bump increase. And also as a result of stiffer springs, even lowering it to the lowest ride height. I would expect the rear end on a V10 SRT10 to be super twitchy and act like it’s on ice in a full throttle 1st gear turn exit. But no, still that odd bog down behavior.
I’ve probably spent more time trying to figure this out on this Viper than on any other car that did this. But still can’t seem to get it sorted. It works best if I sort of nurse it around the corner without trying to finish out the rotation with throttle, and maybe that’s the line to pursue. If it were a real car, I would say the converter is too tight.
Any suggestions? What simple silly thing am I overlooking?
Sorry for the long post. But I’m trying to convey all the things I’ve tried as succinctly as possible so maybe someone can spot what I’m missing without having to go through a bunch of “turn up the rear diff accel” type answer when I’ve already tried that in various combinations with other things. I suspect I may not be the only person to experience this, and there is a “just do this to fix that problem” that I’ve not yet found or figured out…