Stupid over rev

[Phathry25]

Meant to post this a few weeks back after it happened.

I know I've asked before to get rid of the over rev after a downshift and just make the bike hit the rev limiter. Got asked would that happen in real life? And asked if I wanted to try.

Good news, I finally tried, inadvertently. My bike popped down a gear without my acknowledgement. I am happy to report it did not rev to 20,000 RPM, and it just revved to the rev limiter and had some chatter at the back wheel.

Can you change the game yet? Please.

[jlv]

Do you mean for open throttle or closed? Right now I have it set to make -10 ft/lbs when over the redline and adding another -1 ft/lb for every 500 RPM over. I thought that had stopped it.

The two strokes are just -1 ft/lb for every 1000 RPM over but I assume you mean the four strokes.

[Phathry25]

4-jokes, WOT. It's just a sound thing at this point I guess. I don't care about the competitive advantage.

[jlv]

So when you did it IRL, did it stop firing for a second as the engine went over the redline? Seems like the accidental downshift should have made the rev limiter cut all sparks until it fell below the redline. Too bad you don't have a recording. Would have been interesting to hear.

[Phathry25]

It was just straight to the stand rev limiter sound. I don't think the tire can force the engine over the red line, the tire just slows down to match what the engine is doing. Which is why it just chatters. Maybe it's the chain not being good at transmitting power the opposite way.

[jlv]

It definitely goes both ways. You can hear it any time you coast down a hill. I think the real issue is the red line negative torque sound. The game uses a no throttle coasting sound in that situation but apparently that isn't right for wide open with negative torque. I found a couple of car clips on youtube where it definitely sounds like it's still firing despite the fact that it's over the redline. I don't know if these cars have rev limiters though.



I feel sorry for this guy. Must have felt like such an ass!


Not sure this is important enough to be worth risking grenading a motor just to get the right sound.

[joey_2-fitty]

"you just blew my tranny up"

[KTM57]

With the current system for sounds, would it be possible to just assign the rev limiter sound for incredibly high RPMs instead of the zipper sound, or are the sounds derived at that point?

[jlv]

You can give it a sample to play for any RPM range you want. The trouble would be getting full throttle negative torque right since right now it's a 2d table with RPM as one axis and torque as the other. IIRC I tried using throttle as the 2nd axis but it didn't sound as good for partial throttle.

[nmaynard786]

The current over rev is correct.

The engine will still turn over the rev limit and sound like it is firing even if it isn't. All the air still has to go somewhere. The reason for this is because the clutch is still engaged to the engine whenever you downshift to a higher ratio causing the engine to spin faster. Even though it may not be firing the engine is still physically rotating due to the clutch engagement.

[Phathry25]

What about chain slack and wheel chatter. That's all I experienced when it happened. The cars didn't have that benefit. Plus heavier driveline and wheels and more traction to keep the wheel spinning instead of sliding.

[jlv]

So you're saying more negative torque over the redline? How much more? The current numbers are a wild ass guess so I'm open to adjusting it provided there's a rationale for the new WAG.

Also, while the chain/wheel might have chattered I doubt that used up much energy compared to spinning the motor above the redline.

[TeamHavocRacing]

The sound of the over-rev when you're in a corner is an alarm that you're about to be a victim or a witness. Other than that ray of sunshine, more sounds/sound channels for ambiance and authenticity would be hep, man. The whump of suspension (or case) hitting the earth, the buzz of the chain on sprockets, the chirping of endangered birds being driven from their habitats....