Quote Originally Posted by erik erikson
We still build a lot of the 374-380.
A few of the tracks go very "dry-slick" around here.
If it is an open class then it is the 14.5 to 1 comp. ratio,along with a 6.125 rods,mech. roller cam etc.
For a bull-ring it is not un-common to use a 6.50 gear or more.
We ran them at about 15.5 - 16:1 on methanol in the late 70's on a high banked bull-ring in the sprinter. Larry Nagel built the engines, don't remember the exact setup but it was 3.48 stroke, long rod and a hi $$$$ piston. Track had a 400 ci limit then, when it went dry slick we would put the final gear ratio at about 6.70:1, set the chassis very soft, feather-foot the throttle, and run on the bottom!!!! If the track pulled any moisture up at all, could do some giant wheelies coming off the turns!!!!!