[TR] Flywheel lightening

[ZoboHerald at aol.com]

In a message dated 12/19/2008 10:33:04 A.M. Eastern Standard Time,  
triumph74tr6 at yahoo.com writes:

Actually, I was thinking that 4.03 first gear would be perfect with a  3.27
rear end in my Sports 6!  
Well, maybe! Still seems like first would be nearly useless behind a 2L  six 
and surprisingly Herald-like behind a 1600.
 
Some numbers, hopefully readable:
 
4th / 3rd / 2nd / 1st / Rev.
 
Vitesse/Sports 6 1600 (4.11:1 final drive)
4.11 / 5.74 / 8.88 / 15.42 /  15.42 -- overall ratios
1.00 / 1.25 / 1.78 /  2.93 /  2.93 --  gearbox ratios
 
GT6 (3.27:1 final drive)
3.27 / 4.11 / 5.82 / 8.66 / 10.13 -- overall  ratios
1.00 / 1.25 / 1.78 / 2.65 / 3.10  -- gearbox ratios
 
**T5 on eBay with .81 5th gear (paired with 3.27:1 final drive)**
3.27 /  4.87 / 7.75 / 13.18 / 12.30 -- overall ratios (5th overall 2.65)
1.00 / 1.49  / 2.37 / 4.03 / 3.76 -- gearbox ratios  

Spitfire 1500 US-spec. (3.89:1 ratio, single-rail gearbox; note that  
three-rail all-synchro is almost the same)
3.89 / 5.41 / 8.41 / 13.65 / 15.00 -- overall ratios
1.00 /1.39 / 2.16 / 3.50 / 3.85 -- gearbox ratios

 
Herald 1200, Spitfire 4-Mk3 (4.11:1 final drive)
4.11 / 5.74 / 8.88 /  15.42 / 15.42
1.00 / 1.40 / 2.16 / 3.75 / 3.75 
 
Triumph 10 and Herald 948TC (4.55:1 final drive)
4.55 / 6.62 / 11.20 /  19.45 / 19.45 -- overall ratios
1.00 / 1.454 / 2.46 / 4.271 / 4.271  --  gearbox ratios
 
For whatever the above is worth... ;-)

--Andy  Mace

*Mrs Irrelevant: Oh, is it a jet?
*Man: Well, no ... It's not so  much of a jet, it's more your, er, Triumph 
Herald engine with wings.
--  Cut-price Airlines Sketch, Monty Python's Flying Circus (22)

Triumph 10 /  Herald / Sports 6 vehicle consultant, The Vintage Triumph 
Register: _http://www.vtr.org_ (http://www.vtr.org/) 

Check out the North  American Triumph Sports 6 (Vitesse 6) and Triumph Herald 
Database: _http://triumph-herald.us_ (http://triumph-herald.us/) 

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