It states on the link.
Divide the # teeth on the diff by your rear pulley (connected to the center pulley) and that's your second gear ratio
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Thanks brotha that helps a lot.
(01-03-2014, 08:38 AM)Moletron Wrote: [ -> ]Thanks brotha that helps a lot.
Not problem bro. That's why we are here
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so correct me if i'm wrong but this is what iv come up with. So if i switch to 64p and go to a 102t spur and a 23t pinion it will be essentially the same ratio as my stock 48p 80t spur and 18t pinion. But by doing so ill get a spur that the size of a 76.5t 48p.
(01-03-2014, 08:46 AM)Moletron Wrote: [ -> ]so correct me if i'm wrong but this is what iv come up with. So if i switch to 64p and go to a 102t spur and a 23t pinion it will be essentially the same ratio as my stock 48p 80t spur and 18t pinion. But by doing so ill get a spur that the size of a 77.25t 48p.
I'm unsure of what the pitch will do as I have yet to experiment on different pitches. So I can't answer that.
I assume your second gear ratio is 1.36 (with a 30t diff and 22t pulley).
If so, your gear ratio will differ by .01 (gave me a 6.03 with your teeth values compared to my stock values 6.04)
Curious what does the 77.25 value hold for? If you had that with the 18t pinion instead of the 80tspur and 18t pinion? Is that what the 77.25 is for?
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So I'm not stock I changed all the pulleys to metals enroute ones and changed the sizes to fix the slop. I'm now at 38/14 14/14 23/30 with a stock spur and an 18t pinion. The reason I want to reduce the spur radius is I order the mst ht upper arm set up and I'll be modding it to work on my d3. With the current spur setup I'm scared I won't have enough room for the arms as the spur sits really close to the shock tower where I'll be mounting them. This is assuming the stock or well 80t spur an 18t pinion will be the proper gearing for my yokomo 10.5 turn motor. Hopefully I answered your question
76.5 actually I messed up the calculation, 102t 64p spur will be the same diameter as a 76.5t 48p spur. Granted there no such thing as a .5t spur but you get the idea.
Well your gear ratio still only differed by .01.
I assumed stock pulley values when I pulled out the 6.03 vs 6.04.
Oh and I see what you mean now. I think it would be best to wait until you get the new arms to see if you will have sufficient clearance. And adjust spur/pinion values accordingly if you don't.
Have you searched if any other users have modded and made the mst arms work on the d3?
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Yeah good call I just want to get it all figured out ahead of time as shipping takes forever. I'll keep you guys up to date on the build and when all my parts come in ill make a tread for the build. Again thanks for the help
(01-02-2014, 11:43 PM)Moletron Wrote: [ -> ] (01-02-2014, 10:24 PM)gerakatom Wrote: [ -> ]i just used a cs calculator app on my phone. it dosnt have an input for motor size though but i think it assumes we all use 10.5.
you can go to a 78 spur and it wont change the fdr much.
What app do you use? I've got one but it doesn't have input for spur or pinion.
its just called cs calculator. maybe iphone only? i dunno.