CCS ROC Daytona 2013

[Pigman]

Based on an earlier discussion, you should be looking at the torque curve, not HP.

No ur wrong its Hp.....If he did that he would be shifting at 11K. Bike still makes power up to 15-15.5ish

If it was a LS6 BB chevy thats a differnt story as cars to bikes is.....Torgue isn't like in a car the HP is what does the real work


Just look at this dyno sheet as an Example: you would be shifting at 7K if that was the case

[Kurlon]

Based on that torque curve I wouldn't shift at 7k, even without knowing the gearing I'm going to be going back to a point with less torque shifting that early. 9k looks like a better candidate, maybe pushing past a touch if the gearbox would make you dip past 6k when you grab the next gear. That'll keep you in the meat of the torque, but you've got lots of overrev for when you need to skip a shift due to track layout. (Ok, we're talking about a Busa so it's all straight lines but still...)

[Pigman]

Rev to Peak HP and shift easy as that.......

[OreoGaborio]

If you're that anal & wanna get crazy with it.... http://www.sportrider.com/tech/146_0402_art/

[Jim]

If you're that anal & wanna get crazy with it.... http://www.sportrider.com/tech/146_0402_art/

Good find Pete. I'm curious what dyno shop would actually dyno your bike in all gears, instead of just 4th.

[Kurlon]

Good find Pete. I'm curious what dyno shop would actually dyno your bike in all gears, instead of just 4th.

Most will if you ask them to.

[Jim]

It's to bad I can't get my laptop to hook up with my Yosh ECU. I'm sure there's a way to set the shift light for each gear.

[Kurlon]

You've only got a USB cable for that right, not a standard serial cable?

[OreoGaborio]

Good find Pete. I'm curious what dyno shop would actually dyno your bike in all gears, instead of just 4th.

If you know your gear ratios you don't need to. The output of the motor is the same in all gears. The reason they use 4th is because it's typically closest to 1:1 ratio.

[Jim]

You've only got a USB cable for that right, not a standard serial cable?

Correct

If you know your gear ratios you don't need to. The output of the motor is the same in all gears. The reason they use 4th is because it's typically closest to 1:1 ratio.

So my shift points would vary with different sprockets too?

[Kurlon]

No, changing sprockets would alter the MPH you'd be at when you shift, but not the RPM.

[OreoGaborio]

According to that article, my GUESS is yes, but barely. Changing the final drive ratio would affect all gears "equally", but because it's by a percentage it may change it a little. You'd have to do the math.

[CBR929RE]

Rev to Peak HP and shift easy as that.......

or get a Honda where it builds power all the way to redline

[Pigman]

or get a Honda where it builds power all the way to redline

Not true.....all bikes make peak HP then fall off.....and as that article proves, its before the Redline on the Tach

[Kurlon]

Not true.....all bikes make peak HP then fall off.....and as that article proves, its before the Redline on the Tach

Care to put money on that?

I've had more than one machine that hasn't peaked out before safe redline/limiter. All depends on the setup. (Had one machine that didn't peak TORQUE before reaching piston speeds that spelt disaster. Fun screamer.)

[OreoGaborio]

(Had one machine that didn't peak TORQUE before reaching piston speeds that spelt disaster. Fun tractor.)

fixd

[Kurlon]

fixd

15k RPM on a chinese crank, rod and cast piston. Shouldn't even have run it up that high but it just kept making power so... If I had a spare bottom end I would have finished it off on the dyno just to see where it'd let go, but it lives on now as a tractor in Doc's 70.

[OreoGaborio]

(Had one machine that didn't peak TORQUE before reaching piston speeds that spelt disaster. Fun Chinese tractor.)

fixd

[Kurlon]

Hah.

[CBR929RE]

Not true.....all bikes make peak HP then fall off.....and as that article proves, its before the Redline on the Tach

I have dyno graphs for 2 different Hondas that show it is true. gsxrs just suck.

my 600 graph looks like it hiccups at the very very top, like it hit the limiter there. that's the only time it goes down.

[Jim]

no short shifting this time. Stock gearing was topping me out at 151 MPH, but the +1 rear sprocket would get me around 155. Practice was stock gearing, races I ran +1

[nt650hawk]

where is the 169MPH GPS identified you said you hit?

[Jim]

where is the 169MPH GPS identified you said you hit?

That was in ASRA SportBike, and I only record in practices. I cant tuck my helmet behind the windscreen when the GoPro is there. I'll post up a screen shot of the QSTarz data if you really want to see the top speed from that race.

[GixerJockey]

I'm not sure what's being argued here...


But: Jim is wrong (and fat), Piggy is right, Pete is handsome, and Josh is spouting loads of crap that's over everyone's head.

[CBR929RE]

when you say +1 you're talking about the front sprocket right? for some reason it sounds like you're talking about the rear but that would give lower top speed