Hi Folks, about 2 years ago we used to run 20:80, then I migrated over to running 16:64, this is using the 219 style chain, my main logic was it made the rear sprocket much smaller and the reduced inertia would allow the rear axle to spin up quicker - theoretically.......we back-to-back tested in detail at our local circuit, and I really couldn't deduce much difference in lap-times, but one nice benefit was the smaller 64 axle sprocket was now above the chassis rails, so it would not hit the kerbs or cause damage or scrubb of speed when kerbing.......so we ran 16 drivers ever since......3 race wins, 1 championship, 6 poles and 15 podiums later I'm re-questioning my sanity, as others have achieved more.......as the dyno is saying a 20:80 accelerates the dyno-flywheel quicker than a 16:64......by about 0.05 seconds in a 3 second pull from 2600-6100rpm.
We race on very start-stop type kart circuits, not ovals........based on your experience whats your feeling, 16 or 20?
Admittedly when we tested it my son was 9 years old, not bad, but not great either......now he is 11 and slowly becoming a bit of a driving weapon, as we won last week (see link below, kart 88 in the 2nd feature down) .......I will test both again on track, but any opinions welcome in the meantime.
http://www.buckmoreparkkartclub.co.uk/results-reports/race-reports/bpkc-summer-champs-r7/
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We race on very start-stop type kart circuits, not ovals........based on your experience whats your feeling, 16 or 20?
Admittedly when we tested it my son was 9 years old, not bad, but not great either......now he is 11 and slowly becoming a bit of a driving weapon, as we won last week (see link below, kart 88 in the 2nd feature down) .......I will test both again on track, but any opinions welcome in the meantime.
http://www.buckmoreparkkartclub.co.uk/results-reports/race-reports/bpkc-summer-champs-r7/
.