quote:

Originally posted by TOP38:

quote:

Originally posted by wideopen231:
This maybe more of opion thing then fact.

We all know the rule of thumb that 1 lb. rotating weight equals 10 lbs. sprung weight. My question does this apply to front wheel and tire weight also? Yes it is rotating. Is it adding more or less load to engine same as rear wheels or flywheel weight? Engine has to work harder to spin those if weigh more. Can see where rolling easier like with better bearings help reduce power used.Does it also take more power to roll front tier over if it weighs 5 lbs more than another equal power to haul 50 lbs heavier driver down the track?

If so change front wheels on FED from weld aluma star(original) to wire spoke would shave .15 off et 15 lbs less x 10 for rotating. Sorry I find that super hard to believe.

First your rule of thumb is wrong! Where the added rotational weight is place matters!

Second, you are talking about adding or subtracting 5 drops of water in a large lake! It just doesn't matter.

Case I point, 7.3 dragster ran the exact same ET and MPH with bead lock's vs no bead locks, same tires!

Move on to something more important.

quote:

Originally posted by wideopen231:
old rule is 1 lb of rotating equals 9 to 10 lbs depending on who you hear it from. HAve never seen or heard where as part of it, Never said I agree with rule.I do agree with where it is does. 1 lb out of axle is not same as 1 lb off tire weight. Also don't agree that off rear end is near same as off flywheel.

I agree with have seen no difference most of the time as in your example with bead lock's and most of that difference is towards outer part of mass.

Again its mostly a opinion thread and all are good.Some opinions backed by have seen work and good amount of have not seen it work out.

quote:

Originally posted by TOP38:

quote:

Originally posted by wideopen231:
old rule is 1 lb of rotating equals 9 to 10 lbs depending on who you hear it from. HAve never seen or heard where as part of it, Never said I agree with rule.I do agree with where it is does. 1 lb out of axle is not same as 1 lb off tire weight. Also don't agree that off rear end is near same as off flywheel.

I agree with have seen no difference most of the time as in your example with bead lock's and most of that difference is towards outer part of mass.

Again its mostly a opinion thread and all are good.Some opinions backed by have seen work and good amount of have not seen it work out.

Not sure who you hear stuff from but you may want to listen to others! It certainly matters where you add any kind of weight! For rotational weight, the further you add it away from the center of rotation the more energy needed to accelerate it and to also stop it! That's a fact!

quote:

Originally posted by bill masiello:
One little change may not help but put together 10 little changes will show you something !