Spread Sheet Calculator ?

[RideGuy]

I was wondering if anybody saved the spread sheet calculator from the old forum. The input's were Gear Ratio,center to center, belt length, rpm, clutch diameter.... I think Krom posted it.....???

I lost mine over the years and am contemplating gear change if I don't go back to 57/63...... I loved the 57/63' but I see there are some serious options at Black diamond...... I'm just currious what the top end speeds would be with the 56/64 and other sets up to 52/68??

If I recall the 57/63's were in the 60's with my set up.... They were spunky gears.... till I rode early season without changing the oil in my case.....

I'm running the 60/60's right now working great but not near as fun blipping the throttle.... Climbs good and hold's rpm fine but clutch heat is more than the 57/63's....

Now I've been thinkng about this for a while... Rarely in the mountains do you look for top speed nor will you find a straight stretch long enough so what's the point of 60mph gear sets if you can't hold that speed on a climb.....???

So I'm just wondering how far you can go with the gear change before it's just dumb.....

T.I.A.

 

[Farmington Motorsports #9]

I have it - PM me your email address and I will send it to you.

Thanks

 

[Heavysledz]

Here you go...not sure if this is exactly what you wanted but it will tell you your theoretical top speed based on gearing and RPM etc...

 

[RideGuy]

The Speed Calculator I was looking for was for the Diamond Drive.

Thankyou

 

[Heavysledz]

The Speed Calculator I was looking for was for the Diamond Drive.

Thankyou

No problem....sorry i couldn't help.

 

[tundramonkey]

Here's one with a 10.4 secondary clutch.

http://michigansnowmobiler.com/diamonddrivegearratio.htm

 

[RideGuy]

No problem....sorry i couldn't help.

Thanks any way I'm sure somebody will use it

 

[RideGuy]

Here's one with a 10.4 secondary clutch.

http://michigansnowmobiler.com/diamonddrivegearratio.htm

I do have the 10.4" T.I.A.

Am I guessing the % of overdrive? I'm assuming how much I figure I spread the secondary.....

Like I figured the 57/63's make alot of track speed..... May experiment with higher ratio and throw some more primary weight at it...... Not sure if there are enough secondary spring rates to prevent driving those sheaves right apart.... LOL

Cheers

 

[2zeros]

% overdrive?

What is being overdriven? Is that the clutch ratio, or gears in the DD? I am very curious how the calculator works. Thanks-00's

 

[tundramonkey]

I have no idea what that means. I do have another one, but I would need to email it, if you would like it pm me with your email addy and I'll send it to you.

 

[RideGuy]

Pm'd you my address T.I.A.

Well I'm just a hack when it comes to clutching.... So I'm sure somebody will correct me here....

Let's say your clutch's shift out in a normal range with your calibration at full RPM and Load.... Lets for argument sakes say the sheaves are open half of there helix stoke at RPM under desired load...... I believe they call this 1:1

Now my understanding of overdrive would be when you don't have enough load to limit your upshifting to allow you into overdrive...... This would be when you shift into overdrive and gain a few more M.P.H. Most likely on flats or downhill..... Or when you have gained some ground clutching, or lowered the gearing to a point...... The Secondary Sheaves would now be open more and the belt riding lower in the Secondary and Higher in the Primay which would be 1:2 for overdrive.....

I usually assume the more overdrive achieved is a good thing unless you have no bottom end......

Hope some of that makes sense and I'm not totally in left field here......