CLASS RACER FORUM - View Single Post

Ed Wright · 12-08-2014, 10:51 PM

The diameter on the weight difference makes a difference. 5lbs on a spool, or an even smaller diameter driveshaft is all that much change in inertia. Five pounds on a 32" tire, for instance, is a different deal. I have a pair of Goodyear radials, same size as my MTs, but five pounds per tire difference. Hook just as hard. Consistent four hundredths slower than the Mickys. Three of it in 60'. I can't imagine how it could be anything but weight.

I spent money to get six more pounds off a crankshaft during a freshen up also. Saw nothing. A very low hp engine? Maybe.

12-08-2014, 10:51 PM	#24
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: steel or aluminum driveshaft? The diameter on the weight difference makes a difference. 5lbs on a spool, or an even smaller diameter driveshaft is all that much change in inertia. Five pounds on a 32" tire, for instance, is a different deal. I have a pair of Goodyear radials, same size as my MTs, but five pounds per tire difference. Hook just as hard. Consistent four hundredths slower than the Mickys. Three of it in 60'. I can't imagine how it could be anything but weight. I spent money to get six more pounds off a crankshaft during a freshen up also. Saw nothing. A very low hp engine? Maybe. __________________ Ed Wright 4156 SS/JA