Travel Speed

[gerard]

I don't know about exact ratios but I know that changing a car tire size will drastically affect the speed as indicated by the odometer. Pick ups with oversize tires that didn't change the speedometer pickup could be off as much as 7mph.

[gordon]

Spreadsheet? You don't miss a beat do you Mark! I'll say one thing that if you were a products tester there would be no recalls on the products that you tested![img]/w3tcompact/icons/smile.gif[/img]

A GPS sure is handy isn't it I remember when Loran C was the best thing since sliced bread for boat navagation and at the time it was. Bad thing was when you got to far inland or too far offshore the accuracy went down. But much better than a sextant. One trip to Bermuda never could the sextant, raining and nasty the whole week it took to sail there!!! Then came the GPS at a very high cost when it first hit the market. Now you can get a GPS for a very reasonable price.---Times a changin!

Gordon

[MChalkley]

RobertN - You'd better be sitting down: I've got 3.07 gears in my Dodge, with 33" tires.

I can run 70 mph in 6th gear at 1700 rpm - it's obviously too tall a gear for pulling more than 5k or so, but it sure works great for running empty. And in 5th (direct), it'll run 70 at 2200, so I can tow just fine, even on the Interstate, in that gear.

MarkC

BTW, if you need a spreadsheet with those formulas in it, I've got one I made up for my Dodge.<P ID="edit"><FONT SIZE=-1>Edited by MChalkley on 9/6/00 09:58 PM.</FONT></P>

[MChalkley]

Gordon - I've got a Garmin StreetPilot ColorMap that I take everywhere (except, usually, on the tractor). Sometimes I wonder what I did without it.

MarkC

[gordon]

Mark & Robert check out this calculator http://dirtroad.com/gears.htm
Gordon

[Kubota-monkey]

Yes my L35 goes about 15mph and I get bounced so that my head almost smashes into the canopy with my seat belt on when I hit a bump. I dont even understand why you would want to go 25 mph on a road????

[MChalkley]

Kubota-monkey - Check out my L4310 Enhancements topic on this section of the forum for a replacement seat that'll make you think you're driving a Lincoln by comparison.

MarkC

[RobertN]

I started working some of the formulas. But, since our HST does not give a known drive ratio, it is kind of hard. Also, I don't know what the final ratio of the range selector is. I don't see that information in my manuals.

How would one figure that?

I guess you could assume some things. Since my B8200 has speed for each range on the fender, You could figure out the overall gear ratio based on rpm, tire size, constant. then use that calculated ratio to figure the difference caused by a chnage in tire size.

Yes, you mentioned 3.07 gearing, when Iexpected you might have 4.11' or so, in a earlier conversation. Then you mentioned the important part; the diesel is typically geared taller. It all made sense when you explained it..

RobertN in Shingle Springs Calif