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hey guys just recently bought an o5 ext and wanted to know what the gears are for this machine seems to have a lot of top end? I'vegot 73gram big dogs, orange spring. cdd75 helix, 034 belt, reprogrammed ecu.pac set at lean 93mph 92mph time and time again in 660ft snowdrags. the thing is that my rpms go alittle too high 7900 8000 at full throttle my engagement is at 4900 rpms for it has a shim off the primary i believe it is a 144 inch track 1.25 lug. pretty even with an06 f7 sno pro. same set up well allmost.except the cluthing. tony stewart got us by maybe a sled lenght 3 degree and sno pro track. and a 100lbs driver. we do 660ft snowdrags in winterwonderland. any info would be apreciated
 

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stock should be 65/55 gears good for real long runs but for short 500 or 660 drag you should go down i run 60/60 with the 10.4


you may want to try 75 big dogs to bring the r's down if you have no pipe 7900-8000 is to much
 
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