4:86 vs 4:11 quick change rear end

[Morgan Racing]

is there any pros and cons of running either one. always ran a 4:86

[Racer96m]

4:11 has a lighter ring gear, so less rotating weight, and the pinion has more teeth so its stronger. I run a 4:11 but most use a 4:86. You can get gear sets for any combination you need with either pinion.

Dave

[bowtech]

The most common problem you will run into as stated above most people run the 486 gear selection will be tougher at unfamiler tracks with far fewer drivers using the 411 especially in crate

[Matt49]

The most common problem you will run into as stated above most people run the 486 gear selection will be tougher at unfamiler tracks with far fewer drivers using the 411 especially in crate

Why would it be tougher at unfamiliar tracks?

[RW57]

If you need to borrow a gear you will not know anyone to borrow from and if you find someone to borrow from most will have sets for 4.86.

[ckyracer00]

Maybe a dumb question but if a guy runs a 600 with a 486 would you be able to run the same gear with a 411 and achieve the same rpm?

[Racer63]

602 in a 486 would be a 511 in a 411 rear.

[Matt49]

http://static.speedwaymotors.com/images/charts/Chart-80285.gif

[Kwoods25]

Yeah doesn't same gears work and make it same ratio you will need?

[ckyracer00]

Ok I didn't ask my question very well, will the same ratio make the same RPM, not talking about the same set #'s

[taylor2727]

Yes same ratio is the same but you need a different set number to achieve that ratio. I find it easier to borrow a gear or lend one I have 4.11 everyone I know has 4.86 and when we are at the same track I am looking for a set # that they wont be using so have no problem borrowing their 6.25 when its a 7.14 for them

[ask0329]

I forget off the top of my head but whats the method for turning the tire and counting how many times the yoke spins to determine if you have a 486 vs a 411. Or what would the tooth count on the ring gear be for either one once pulled apart? Its been so long since i've messed with a quick change. Thanks in advance.

[Kwoods25]

So if I'm running a 5.28 now (set 6) in my 4.86 I wouldn't run that same gear set for 4.11? I would have to run gear set 4a or 20a ? Bought a 4.11 for this year and just new to the whole deal. Run 4.86 for last 5 years

[Matt49]

The ring and pinion number is a ratio that assumes 1 to 1 quick change. Then the quick change set provides another ratio. You multiply the two to get your final ratio. So YES you have to run different gear sets in different ratio ring and pinion rear ends to achieve the same final ratio.

[Kwoods25]

Thanks matt49