Shorttrackthing
Member
I took this down because it was confusing and we keep updating our gear chart because everyone has a different awnser, which i expected
Last edited:
Gearing chart I made for Michigan tracks
- Thread starter Shorttrackthing
- Start date
MO Predator Racer
Member
I am confused on why such a low number rear gear? I could be wrong but it may work but I would never put a really low rear gear number like numerically on my kart. Ratios seem to be correct but I would change the front and rear sprockets to get something a little more common because a lot more people have 58-70 tooth gears than down in the 53s. I may be wrong so please correct me if I am.
racing promotor
Moderator
Actually the low numbered rear gears 53 and lower, even in the 40s work great with the predator, however that's with the right size front drivers, and what is shown isn't correct provided the track sizes are correct.
Shorttrackthing
Member
I posted this to see what people think, and to improve it, anything I can improve
mike97760
Site Supporter
Your engine class and desired rpm at the end of the straights would give us a reference point. The gears we run in Box Stock Predator at 4900 rpm arent the same as what we run in clone (7000), stock appearing (7800) and small block open (8600) on the same track, same day.
Why do the smaller track have higher gear ratios?
Smaller number equals faster speeds.
I can't see a 1/4 mile being slower than 1/8 mile track for top speed.
MO Predator Racer
Member
Didnt know that. I was wrong. Thanks Race Promoter! Still sounds like his ratios are off from what people are saying.
racing promotor
Moderator
Yes if track sizes are correct ratios are off, let's just say gear bound would come into play.
Shorttrackthing
Member
No they dont, they have lower ratios, I dont get how you think that
https://4cycle.com/karting/attachments/screenshot_20220226-155823_samsung-notes-jpg.20766/
1/4. 4.2 ratio
1/5. 4.0 ratio
1/8 3.5 ratio
engine revolutions divided by ratio gives axle revolutions.
1/4. 4.2 ratio
1/5. 4.0 ratio
1/8 3.5 ratio
engine revolutions divided by ratio gives axle revolutions.
racing promotor
Moderator
With 15 T on clutch for the 1/8 mile track your not far off with 51, 52 rear.
With 15 T on clutch for the 1/5 mile track your like 14 numbers to high with a 60 rear.
With 15 T On clutch for the 1/4 mile track your like 20 numbers to high with 63,64 rear.
The actual number rear would depend on how much momentum the tracks actually make of course.
XXX#40
2A supporter
Yeah he seems backwards on his ratios
MO Predator Racer
Member
I run same motor as this ole boy and I run on an 1/8th mile and I am running a 4.28
Knightrider955
Member
We run a 1/3 mile at Mid Michigan raceway park and run 12/62 with a Predator on methanol
KartRacingLA
Member
Something is not right. My wife runs a 12/56 on a 1/11 mile
Knightrider955
Member
We were hitting speeds of 60 mph plus. 18-19 second lap times. We run 12 66 on 1/5 mile in Grand Haven with a animal on meth. 1/11 mile would be misereable. Might as well be driving in a cirle lol. If your in Michigan and have a champ kart, I'll send you the schedule for Grand Haven. Come out and run with us.