for a stock 99 formula z 670 with 192 studs what is a good clutch setup for better acceleration and still maintain a decent top speed? i have geared down one tooth from a 25 to 24 but need a good clutch setup also, any ideas?

Every sled is alittle different but I would think you would want 145 ramps a 5o helix, around 18.5 grams pin and either a 185/410, or a 230/410 spring. After that you might want to try a more aggressive helix like a 54/48 or a straight 52 depending on your wieght. Good luck.

145 ramps fall flat on top when used in a 670, use a px or goodwin gp2, both have a similar profile to the 145 but lay down on the tail more, . px ramps, 18.5 gm pins 200/350 spring and a 52/48 helix with the stock spring in b-6 will turn the sled into a 670HO