x-6 gearing help

[pizzaman]

hi, could some one please tell the correct pinion to use with a 78 spur. im using lrp sphere comp with x11 6.5 bonded and the 4 gear x-6 tranny.
i would rather get longer run times than over heat motor or speedo
cheers

[JustARcFan]

22 would be ok.

[Body Paint]

That sounds a bit big for a 6.5 Bonded, isn't it?

[JustARcFan]

Depends a bit on the track but a 22 or 21 would do it. Best you can do is test it and feel how hot the motor is after a run.

[bigred5765]

that is to big on a bonded rotor, we ran them all last year i would say 20 ish.

[burgie]

is a 22 too big? really?

i was running my x11 5.5 bonded on 23....anything less than that an it just sounded like it was revving it's tits off without going anywhere.

[bigred5765]

well not really to big but the guys asked for run time not speed,but 23 on a 5.5 is just plain crazy lol

[super__dan]

I agree, start lower and work up than overheat it and then gear down.

[burgie]

Originally Posted by super__dan

I agree, start lower and work up than overheat it and then gear down.

that's the ACE thing though, mine doesn't overheat on a 23, it runs cooler than it did between 20 - 22