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Triumph TR6 - MPH PER 1000 REVS

Gents.
Could someone let me know what my TR6 does MPH per 1000 revs
I've been looking at my old Sports Car Mags (1969 to 1975) and there is about 5 road test on the TR6

They each seen to vary in their specifications as to how many MPH does the TR do per 1000 Revs

For example one states Top Gear
21.21 MPH per 1000 revs

None of the mags give any details as to Top Gear Overdrive MPH per 1000 revs

It would be appreciated is someone could give me the factory details of per below (if at all possible) or just the last 2:

First Gear
Second Gear
Second Gear Overdrive
Third Gear
Third Gear Overdrive
Fourth Gear
Fourth Gear Overdrive

Mine is a July 1969 Fuel Injection model sold in Melbourne in December 1969. The drive through and diff are all original together with the 15 inch wire wheels.

kind regards to all
Kevin Farley

Kevin Farley

Kevin- Join and check the archives. Many talks on this. There are many varibles to this answer.
Don K.
DON KELLY

Kevin - According to my Leyland TR6 Repair Operation Manual (1972), the PI model (all) is stated as "revs/min per 10 mph (kph):

4th + J o/d = 376 (235)

4th + A o/d = 386 (240)

4th = 471 (292)

3rd + J o/d = 523 (325)

3rd + A o/d = 514 (319)

3rd = 654 (406)

2nd = 990 (621)

1st = 1412(878)

REV = 1516(952)

Roger H

Roger and Kevin-
Don't forget tire size figures into equation
Don K.
DON KELLY

Kevin - Just looking at those figures again, something is not quite right. Even though they are quoted correctly from the book, I think they have transposed the figures for 3rd A and J type o/d's (it isn't the only 'printing' error I have found!)

BTW, road speed at 1000rpm is stated as 21.2mph (34.2kph) in 4th.
Roger H

Thanks Don - the tyre size specified is 165HR15SP or XAS (for the PI) and 185SR15 for the US models. If you have a lower profile, you may have to allow for a marginally different rolling radius of the tyre you have (check with the manufacturer of your tyre for the exact RR)
Roger H

Roger & Don. Thanks for getting the details for me. And also as to the tyres they are almost the same as the original tyres. I've got a original XAS tyre which is over 30 years old off the trumpie so it's a good match and never been used. It spent many years in the boot so was never used and of course was too hard to put on.

Roger, I've done some further calculation based on your return

4th + J o/d = 376 (235) = 26.59 mph (42.54 kph)

4th + A o/d = 386 (240) = 25.91 (41.46)

4th = 471 (292) = 21.23 (33.97)

3rd + J o/d = 523 (325) = 19.45 (31.12)

3rd + A o/d = 514 (319) = 19.12 (30.59)

3rd = 654 (406) = 15.29 (24.46)

2nd + J o/d ? ?

2nd + A o/d ? ?

2nd = 990 (621) = 10.10 (16.16)

1st = 1412(878) = 7.08 (11.33)

REV = 1516(952) = 6.90 (11.04)

How does it look to you
Have I made a mistake
regards Kevin
PS I am a memnber but the system always shows me as a non-member

kevin farley

http://www.britishv8.org/swaps/design.htm

At the bottom of the page is a link to a small Microsoft Excel spreadsheet that allows you to plug in any size tire, any rear axle ratio and any transmission ratio, and get mph/rpm or rpm/mph data.

Even though it is an Excel spreadsheet, many other spreadsheet programs can also read it.

I wrote it myself, so I know it's virus free and you can download it without fear.
Dan Masters

Nice one Dan - thanks for sharing.

R
Roger H

Just curious, what are you doing with this info?
D Burstyn

This thread was discussed between 15/05/2004 and 25/05/2004

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