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Big gear or not?

2866 Views 20 Replies 8 Participants Last post by  JohnDeere9610
I have never tried high side. Do I need the extra wheel speed? Will it help or hurt? Here are the calculations I came up with. I have never snuffed the charger at the end of a pull. Open for ideas.

3rd gear low side
mph rpm
31 4195
28 3789
25 3383
22 2977
33 tire dia


1st gear high side

mph rpm
37 4637
34 4261
31 3885
28 3509
25 3133
33 tire dia
1 - 8 of 21 Posts
Brian SB sent me a new clutch. I missed the opertunity Friday when I had first hook. It could have gone either way after watching some of the gassers. I guess I need to find the balls to just do it. The new clutch works a whole lot better. Bean I have looked at the wheel speed numbers so many times I think it's driving me crazy. I've always done ok where I'm at but this new clutch has me thinking again.
Humm! I thought 4 low would be too big of a jump. 1st high is between 3rd low and 4th low.
Here's what I come up with for 4th low.
mph rpm
40 4132
37 3822
34 3512
31 3202
28 2892
25 2583
22 2273
33 tire dia
See less See more
3rd gear low side

mph rpm
31 4195
28 3789
25 3383
22 2977

1st gear high side

mph rpm
34 4261
31 3885
28 3509
25 3133

4th gear low side

mph rpm
40 4132
37 3822
34 3512
31 3202
28 2892
See less See more
Well I didn't have the balls to try it tonight since this place has sent me home broken the last three times. Waynesburg PA PPL 8k Open Street 2nd place.
Hey Bean NO BOUNCE the last few times out.
Bean
No bump stops, no front bars, rear air bags to 80 psi. When I mounted the bags I installed the upper mount a little higher so it didn't raise the rear too high. The traction bars have no preload in the lowered position. When the bags are inflated it will load the bars to keep the pinion down. Come out hard and break the tires loose as soon as possible. I know to some extent I'm giving up some distance with this set up. But no bounce. I can try to get some distance back now without breaking everything.
LOL I guess you may be right. A second and a third within a week looks good.
This is a through back to my beginning. Truck never bounced before I added stops. Tried to add everything else to make it stop. The only thing I have are bags and bars.
1 - 8 of 21 Posts
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