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hiperf.com has all the ratios.

Pretty sure 60-60 is a 2.10 ratio????
 

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Ole, Hiperf could be wrong I dunno. I believe Bikeman may also have them all listed on his site. Hiperf has ALL the available ratios listed.

It says 60-60 is 2.11

2.11 in a Crossfire with 9t drivers and 30% overdrive at 7800 RPM's is 103 mph and that's darn close to what they will run on top. Our crossfires will pull a hair more than 30% OD.

2.24 would be only 97 mph with all the other figures the same. So I'm confident the 2.11 is correct.
 

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My 07 C8 has a 60/60 5 pinion, overall ratio is 2.24. The secondary rotates 2.24 revolutions per 1 revolution of the drive shaft.

07 M8 has a 57/63 2.47
07F8 has a 62/58 2.10

Mike, can you post the top speed cart?
 

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Discussion Starter · #8 ·
<div class='quotetop'>QUOTE (Oldcrow @ Feb 6 2007, 04:39 PM) <{POST_SNAPBACK}></div>
My 07 C8 has a 60/60 5 pinion, overall ratio is 2.24. The secondary rotates 2.24 revolutions per 1 revolution of the drive shaft.

07 M8 has a 57/63 2.47
07F8 has a 62/58 2.10

Mike, can you post the top speed cart?[/b]
Bingo

I wanted to know the ratio of the DD. I don't care what you have for drivers or all that other ****. here is the chart that I have.
[attachment=62945:dd_ratios.JPG]
 

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Ole, to figure the gear ratio of the DD use this formula 76 (# of teeth in ring gear) divided by 34 (# of teeth on sun gear) This # stays the same no matter what. 76/34=2.235. Now for the input gear and transfer gear you do the same. Stock 06 700CF EB has 65/55 gears. Take 65/55=1.181. Now divide 2.235 by 1.181 and you get 1.892. The only gear ratio that changes is the input and transfer gears and they must add to 120. (65+55=120, 60+60=120, 57+63=120) If you change to 57/63 gears your output would be 2.47. (2.235/.904=2.47)

Hope this helps you out. By the way, love the 4" riser. Thanks,
 

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I also thought it was 2.11 for 60-60 .... but if you look under your hood on the clutch side it shows 60-60 is 2.24? I'm confused, as what cms is saing about shift/overdrive/speed sounds most logical to me.

[attachment=62975:untitled.JPG]
 

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Discussion Starter · #11 ·
<div class='quotetop'>QUOTE (Tundramonkey @ Feb 6 2007, 06:17 PM) <{POST_SNAPBACK}></div>
Ole, to figure the gear ratio of the DD use this formula 76 (# of teeth in ring gear) divided by 34 (# of teeth on sun gear) This # stays the same no matter what. 76/34=2.235. Now for the input gear and transfer gear you do the same. Stock 06 700CF EB has 65/55 gears. Take 65/55=1.181. Now divide 2.235 by 1.181 and you get 1.892. The only gear ratio that changes is the input and transfer gears and they must add to 120. (65+55=120, 60+60=120, 57+63=120) If you change to 57/63 gears your output would be 2.47. (2.235/.904=2.47)

Hope this helps you out. By the way, love the 4" riser. Thanks,[/b]
Thanks, exactly what I wanted :thumbsup:
 

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What the heck? This makes sense, but doesn't work out for top speed. I believe that the 60-60 is a 2.235 ratio, but using that figure doesn't work out for a top speed #.......hmmmmm. I have 2 different formulas to figure this out and one is very extensive using belt length, clutch sizes and center to center also. 2.235 just doesn't work out for the crossfire! DOH!

Ole now I understand what you were looking for....NOT the gear ratio....
 

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AH HA! I was right. 2.11 ratio for 10" clutches. The chart on the bottom doesn't show enough overdrive and is for 10 tooth drivers. So 105 is correct for our crossfires top end. I feel better now.
 

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Discussion Starter · #15 ·
<div class='quotetop'>QUOTE (cmscat50 @ Feb 8 2007, 04:35 PM) <{POST_SNAPBACK}></div>
AH HA! I was right. 2.11 ratio for 10" clutches. The chart on the bottom doesn't show enough overdrive and is for 10 tooth drivers. So 105 is correct for our crossfires top end. I feel better now.[/b]
I wanted what the diamond drive was. Like on the old chain case sleds. tundramonkey was the only on here who got it. Sorry if I did not explain myself good enough. I have looked at all the formulas with track lug height (witch don't mean ****) or driver tooth. I don't care about all that ****, just dd input and output. :thumbsup:
 

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<div class='quotetop'>QUOTE </div>
I wanted what the diamond drive was. Like on the old chain case sleds.[/b]
Yes, I was wrong on the DD without gears ratio, BUT with 60-60 gears the ratio IS 2.11. If you use something other than 2.11 you won't get the correct speed output. 2.235 ratio will not spit out the correct performance info. It can't.

I don't know what benefit there is knowing the ratio of the DD itself WITHOUT gears. You have to have the effective ratio (with gears) to know anything. I'm still not sure what the size of the secondary has to do with overall ratio though. It shouldn't matter.

Maybe you are using this for some reason I don't know....doesn't matter.
 

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Discussion Starter · #19 ·
<div class='quotetop'>QUOTE (cmscat50 @ Feb 9 2007, 07:52 AM) <{POST_SNAPBACK}></div>
<div class='quotetop'>QUOTE
I wanted what the diamond drive was. Like on the old chain case sleds.[/b]
Yes, I was wrong on the DD without gears ratio, BUT with 60-60 gears the ratio IS 2.11. If you use something other than 2.11 you won't get the correct speed output. 2.235 ratio will not spit out the correct performance info. It can't.

I don't know what benefit there is knowing the ratio of the DD itself WITHOUT gears. You have to have the effective ratio (with gears) to know anything. I'm still not sure what the size of the secondary has to do with overall ratio though. It shouldn't matter.

Maybe you are using this for some reason I don't know....doesn't matter.
[/b][/quote]
The diamond drive ratio for 60-60 gears is 2.235 input to output. This 2.11 you are talking about takes into clutch size (10"). Look at the bikeman chart and look at the row with (ratio w/o clutch compensation). :thumbsup:
 

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Mike, I can only assume that the reason the clutch makes a difference in the effective ratio is because of the diameter sizes...as in where the belt rides at idle. After that it's all about what they can pull for overdrive. Maybe I'm making this too complicated??? Dunno.

I saw the chart and agree on the DD ratio of 2.235 yes.
 
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