FYI: Maximum Speed In Gears ...

[CareerFiremanGuy]

Publications like C&D and R&T used to have detailed road test charts that showed maximum speed in gears. They rarely do them any more so I did it myself.

First 6 gears for stock 20"/21" ST wheels (outside tire diameter is the same) at maximum engine RPM of 6,000 - 6,250 - 6,500:

 

[CareerFiremanGuy]

P.S. Interesting note: 60 mph needs 3rd gear and the quarter mile needs 5th gear

 

[Ford Guy]

What would the ratios be when you're driving normally under regular street limits.
I typically shift from 1st to 2nd around 18mph and so on.
Tks for the info.

 

[CareerFiremanGuy]

What would the ratios be when you're driving normally under regular street limits.
I typically shift from 1st to 2nd around 18mph and so on.
Tks for the info.

If I understand you correctly, you would like to know the result of each gear's MPH Per 1,000 RPM.

In that case:

1st Gear = 5.5 MPH Per 1,000 RPM
2nd Gear = 8.6 MPH Per 1,000 RPM
3rd Gear = 12.0 MPH Per 1,000 RPM
4th Gear = 14.5 MPH Per 1,000 RPM
5th Gear = 17.0 MPH Per 1,000 RPM
6th Gear = 20.3 MPH Per 1,000 RPM

So your shift from to 1st to 2nd at 18 mph occurs when 1st gear is at 3,270 RPM, at which point 2nd gear would be at 2,090 RPM.

Hope that helps!

 

[Ford Guy]

If I understand you correctly, you would like to know the result of each gear's MPH Per 1,000 RPM.

In that case:

1st Gear = 5.5 MPH Per 1,000 RPM
2nd Gear = 8.6 MPH Per 1,000 RPM
3rd Gear = 12.0 MPH Per 1,000 RPM
4th Gear = 14.5 MPH Per 1,000 RPM
5th Gear = 17.0 MPH Per 1,000 RPM
6th Gear = 20.3 MPH Per 1,000 RPM

So your shift from to 1st to 2nd at 18 mph occurs when 1st gear is at 3,270 RPM, at which point 2nd gear would be at 2,090 RPM.

Hope that helps!

Ahh yes that is perfect thank you.
I suppose 3270rpm range is good for this speed..

 

[TMac]

I did a little spreadsheet on rpm drop in gears- shifting at 6000
2nd gear 3815
3rd gear 4302
4th gear 4939
5th gear 5159
6th gear 5030
7th gear 4706

So, one of us is off on our math

 

[CareerFiremanGuy]

Ford Guy was figuring for an 18 mph shift in first gear (which occurs at 3,270).
Going into 2nd gear at that speed (18 mph) would bring him to 2,090 rpm.
That would be a drop of 1,180 rpm.

So, your math is basically correct for what you're trying to compute.