Sprocket size choices.....does it make a diffrence?

[willieworld]

dont forget that tire slippage   willie

[Stainless1]

Come on Willie, let the kid dream, we all know in this sport even the most unlikely dreams can come true. 
Keep the faith JNuts, you are on the right track.... as soon as you are on the long one that is  .  Small motor advice... Gear lower and get the 175 first, then you have room for the long gears.

[smcleod007]

Originally I posted this because I was fighting with the idea of sprocket sizes VS HP VS tire size (and growth).


I decided that a 19 would be the best choice this year because it makes the hypothetical top speed 210 at redline in 6th but the motor stops making power @ 9500 (red is 10900). If the tires grow 1/2 inch 9500 rpm is just around 201.

And with enough spray anything is possible!!!!!

Jonny,
If your using a stock Busa ECU you can raise your rpm limiter. Email me and I will give you the details.

Scott M

[Jonny Hotnuts]

dont forget that tire slippage   willie

The cars motor is over the drive wheels.....this helps.

--ALSO--

I have a traction control system on the car. The rear spoiler on the car is computer controlled with high speed actuators. If there is an appreciable difference in speed between the front and rear wheels the actuator raises the spoiler 1” and pauses and will continue to raise by 1" up to the legal limits (or desired) for spoiler angle. It will also lower the spoiler in one inch increments (30 second pauses), if no additional slippage is noted.

-JH

[dwarner]

Moving the spoiler is at that rate is too slow.

DW

[Loose Goose-Terry#1]

  At speed, probably a 3 to 5 second pause might be closer. Lean on the short side

Terry

[Stainless1]

Moving the spoiler is at that rate is too slow.

DW

Yep, that is only 2 moves in a run at the speeds you want to go over 5 miles.... yes the run will take a little longer than 1 minute but the spoiler will not be effective until you are over 100... 

[willieworld]

was changing sprockets on my bike yesturday and something came to me that i forgot to mention --you want the chain and sprockets to wear evenly if you run a front sprocket that will divide into the rear sprocket ( 24 x 48 ) the chain wont wear even ---much better to run one even number sprocket  and one odd number ( 24 x 49 )  the chain and sprockets will last a lot longer  --just something i learned over the years     willie buchta

[panic]

Archimedes is spinning in his grave.