Good Info
I now see why I have increased my RPM so much ( about 1000) with the Orange spring above what I did with my Stock Spring. I hated twisting the engine in the 6,000 to 7400 Range when dunning. I do have heavy duty valve springs but only running a Mud Buster cam. I think it likes the 5-6000 range. I am going back to the stock spring next run. Thank you for the info on the Red spring too. That might be a good choice. I changed from 14 gram grease type to 14 gram greaseless weights. When I floor it at the drags it hits 7400 RPM out of the hole and holds it at 7,000 RPM until it hits 52 MPH in the sand with (26" Paddles) Probably about 54MPH or so but I swear the grease type weights kept it about 7,000 RPM out of the hole and then with the stock secondary spring went down to 6,000 RPM at 52 MPH. If the stock spring does not work I will get a Red one from you guys.