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Discussion Starter #1
run a 87 indy 600 in 1000ft. ice speedruns. still has the stock gearing (21-35). want to try a 22 gear on top. is this going to affect anything else, such as RPM'S, or shift out or anything else.?? sled makes best power at 96-9800 rpm's. will i need to go to a different spring.?? (blue polaris in it now) any help guys??
 

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Discussion Starter #4
as far as the rpm's go, can change that with the weights. but about shift out, will a person have to go with a different helix, spring, etc. if so, do you go down on the angle of helix or what. right now there's a 40-32 in it. the 21-35 gears are stock gearing for an 87 indy. was just looking to try and get a little more speed. running between 110-114 in a 1000ft. thanx guys.
 
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