• Cheethaspeed’s The Amazing Spiderbox #EPAS+BDX+Vtwin+Belt Drive+gearbox+++++

  • Show off your builds and upgrades here!
Show off your builds and upgrades here!
 #12171  by Sportsman850
 Wed May 02, 2018 3:55 pm
I have the 40 series, the shaft is a 5/8" on the transmission, but plenty long enough. I bought a keyed 5/8-3/4" spacer. Worked just fine. Biggest thing is to secure the reverse good. If you're running big HP, I suggest mounts in every available hole or you'll twist the casing apart. Insides will hold up no problem. Run a good GL5 oil and you're set.
 #12177  by CheethaSpeed
 Wed May 02, 2018 9:01 pm
Sportsman doesn’t do pics without email I don’t think. Good to know about the reverse kit. I’ll post some of my gearing stuff later since I got it out earlier for fink. Sportsman -I’ll show you why I’m really considering swapping to the duster clutch. The calculator says good things.
 #12207  by CheethaSpeed
 Fri May 04, 2018 12:20 am
😮 wow Travis did not leave any travel left in the steering rack! 5 stars buddy. I will eventually send the spare to you to add to your collection of stuff to do.

The driver side tie rod I may shorten 1/2”, I ditched the extra nut for space, but still slightly pigeon toed.

Now I need the brake hubs :mrgreen: :mrgreen:

June right? :lol:
 #12212  by CheethaSpeed
 Sat May 05, 2018 12:08 am
How fast will I be?
Remember the belt drive I have 14,15,16, &17 tooth drivers and 10 axle 68 thru 78 tooth sprockets for any final ratio between 5:1 and 7:1 roughly. I can tune down to about 2 tenths of a mph. Yep-that belt is 40mm wide, or about 1-5/8”. I don’t have to worry about it popping off or breaking.

Let’s just assume I keep it at the stock 3600rpm limit for meow 😹 :lol:
lets see my calculations
Highest ratios Fastest to 30 mode
Travis-you may want to rethink your thoughts that I would be faster top end and slower to 30....
Lowest ratios /highest top speed

What does the 40d look like?
40d w/ highest ratios
Top speed jump due to slightly higher final ratio. I may get one just to test real world. It may help acceleration also I’m not sure without testing. That would be contrary to my anticipated result.

Other torque converters I considered (ing-still) my highest ratios shown only. Top speed gets crazy with these tho, power and weight may factor in.

What about the duster clutch (90 series)?
Duster Wow 20:1 to 4.35:1 doubles the current range of ratios like going from a 3 speed to a 6 speed trans wow!
. This is just better than a 40 series due to the extreme range in ratios. I would expect it to outperform it in every type of test. I want one.

Comet 500 series- looks better also. Got one I can try?
500 series another lower low higher high
 #12243  by CheethaSpeed
 Sun May 06, 2018 7:40 pm
Bump... sportsman any thoughts on the torque converters? This is gx gold for all 3600 rpm guys who plan a torque converter. What’s even scarier is I think I found a rare comet 100d!! To push 25-1 low and bring final back closer to 5:1 or 45 mph top speed and a super low rang. Wow just wowed

500 and comet 90 series are indeed compatible provided they are set up for the same belt width. Same with 700 and 800 series FYI so drivers and drivens swaping are an expensive way to change the way your ride performs. If I only had more money than sense I would test them all. Lol

Dang then when you consider how tunable these things are if you know how and why and what. Dangerous in the right hands.
Wheelies are not part of the plan-i hope
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