Originally Posted by
revo523
What will be a good starting point for gearing running a 13.5 with foams?
I like Xray's 104 spur that will work fine you will not need anything smaller...The biggest pinion you can fit is a 45 so your good....What size is the track and what kind of speedo are you running...That would make it easier...My gearing at the Roar carpet nats was 36/104 with a 56mm tire thats about a 35 to 36 mm rollout...The track was 94 feet long...I was running a KoPropo speedo, so you will probley need to gear higher then that...At the IIC last year I ran a Novak and my gearing was 43/104 thats a 42 to 43mm rollout on the same size track...So you see what the need to know what speedo you run is....Later Drew