silveradocountry
New member
I had bought a 99 sx 700 from a friend who used to drag race this sled on grass. When i bought it, it was set up for grass, he had some polaris clutch crap in there. i want to set it up for 1000ft. Does this sound right : 8bu (no rivets) in the primary with y s y spring, it engages at out 4300 to 4400. Secondary i have a hauck silver spring and a 50 42 helix. My gearing is 23 39(22-40 stock). What do you think? Am i going the right direction. The sled is stock. except for v force 3 reed, speed track with 288 chisels full ohlins shocks and being straped down. I know the sled has the potential to run 110 mph in the 100 ft, ive seen it done.
98srx6
New member
What is the rpm at full shift?
8bu,s not so great for 1000' with that helix. Go to about a 46/36 helix & load the tip or go to 89a-10 weights with a similar helix. You need a low finish angle helix & lots of tip weight to make 8bu-00,s work for good top end , specially in a 700 SX. If you don,t have pipes 84-8500 rpm is the sweet spot for good top end speed. 82-8300 rpm for short 500' drags.
silveradocountry
New member
clutching
how much tip weight in the 8bu's should i run? does my gearing sound correct? have you ran that helix before? secondary spring?
how much tip weight in the 8bu's should i run? does my gearing sound correct? have you ran that helix before? secondary spring?
Last edited: