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Cement Legs
11-17-2004, 02:28 PM
For anyone willing to share, what diameter rear sprocket are you using with how many teeth? How many teeth on your front? Just brain-storming right now and I'm curious as to what sizes are commercially available and what sizes teams are making themselves.

Cheers
Cement Legs
11-17-2004, 02:28 PM
For anyone willing to share, what diameter rear sprocket are you using with how many teeth? How many teeth on your front? Just brain-storming right now and I'm curious as to what sizes are commercially available and what sizes teams are making themselves.

Cheers
Angry Joe
11-17-2004, 02:36 PM
The size of the sprocket is going to be very dependant on the engine you select.

If memory serves we used a 56 tooth sprocket on our R6 powered car. We bought the blank from Sprocket Specialists and machined the bolt pattern and webbing. The Sprocket we used for our WR426 car was much, much smaller - maybe 20-something teeth.
turd furgusson
11-17-2004, 04:10 PM
Just wondering, I was looking at some pictures of your car and was wondering what drove you to choose that sprocket diameter? Did you re-gear the primary/secondary to use that diameter?
Angry Joe
11-17-2004, 10:14 PM
Which car? The 2004 car? I don't choose it but I think they geared the car to 80mph (fast enough for big SCCA courses with 3-4 gears available for competition). Not positive about how they came to the final number but I could find out.
Cement Legs
11-18-2004, 06:08 AM
Hey http://fsae.com/groupee_common/emoticons/icon_mad.gif what was the outer diameter of your 56 tooth sprocket?

Cheers
turd furgusson
11-18-2004, 02:40 PM
If its not too much trouble i'd be interested to find out how they came up with that size (2004 solid axle car)....
BTW a 55t is approx. = 12" diameter
Angry Joe
11-18-2004, 03:55 PM
It was sized for top speed, probably around 80 mph. The dramatic change in size from the previous year was due to the gearing of the WR 426. Due to lack of funds and testing problems, we did not have a chance to experiment with other sizes.
Cement Legs
11-19-2004, 05:08 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by turd furgusson:
If its not too much trouble i'd be interested to find out how they came up with that size (2004 solid axle car)....
BTW a 55t is approx. = 12" diameter <HR></BLOCKQUOTE>


12" tks thats what I was looking for. http://fsae.com/groupee_common/emoticons/icon_wink.gif