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Jim Caughlin · 10-19-2016, 03:32 PM

What's the ideal launch RPM? As much as your engine, chassis and tires will handle. In my case, the 2 step is set at 8400 but the one time that it failed and I left at well over 10,000 netted me the best 60' that I've ever had. Not brave enough to repeat that but you don't see Comp cars or Pro Stockers leaving at anything less than kill.

I am in agreement with most of the other comments here. Without a good slipper clutch and some form of data logger, you're pretty much twisting in the wind. The days of 40 pound flywheels and 3500 pound dead lock up clutches are gone unless you want to go slow and break parts. My flywheel and clutch assy weighs well under 20 pounds total. There are huge performance advantages in reducing flywheel & clutch diameters and weight.

Jim Caughlin
SS 6019

10-19-2016, 03:32 PM	#17
Jim Caughlin Senior Member Join Date: Mar 2002 Location: Woodburn, Or Posts: 685 Likes: 83 Liked 805 Times in 245 Posts	Re: Launch RPM What's the ideal launch RPM? As much as your engine, chassis and tires will handle. In my case, the 2 step is set at 8400 but the one time that it failed and I left at well over 10,000 netted me the best 60' that I've ever had. Not brave enough to repeat that but you don't see Comp cars or Pro Stockers leaving at anything less than kill. I am in agreement with most of the other comments here. Without a good slipper clutch and some form of data logger, you're pretty much twisting in the wind. The days of 40 pound flywheels and 3500 pound dead lock up clutches are gone unless you want to go slow and break parts. My flywheel and clutch assy weighs well under 20 pounds total. There are huge performance advantages in reducing flywheel & clutch diameters and weight. Jim Caughlin SS 6019