This Morgan was original fitted with a 4 speed Ford gearbox. I converted
to the Ford 5 speed standard T9 gearbox in 2001. It has been great with
the fifth 0,82 ratio and 4.1:1 rear end though the first and second gear
always has been much too short.
With the very high power to day, you hardly can stay a fraction of a
second in the first gear, and the second was to high to start out with.
I decided to order the new 5 speed 'Heavy Duty Synchro
Gearbox' design from
BGH with the longest 1st and 2nd gears. It is rated to 280HP, but the
Morgan is a light weight car so probably it can take more.
The BGH E8 is build in the Ford T9 box.
BGH Geartech
http://www.bghgeartech.co.uk/html/5_speed.html
BGH E8 280HP/250lbft
The
Rear-end is the: New 4.1:1 ratio from
Spicer Axles Australia. Former Australian BTR Engineering, former
Borg Warner 9 Bolt Rear-end. Rated to 295HP/229kW 435nm/320lbft in
practice it should be capable of 500HP.
http://www.spiceraxle.com.au/products.htm#beam
The below table shows the speed in 1-5th gear at 6500 RPM for
the old and new configurations.
As you can see in the second gear
1) Old configuration with 185x65 R15 and Ford std T9: 94,3 km/h
2) New configuration with 215x60 R15 and BGH E8: 109,1 km/h
The new configuration made it very fast 0-62mph (0-100km/h):
3.9 sec.
Better grip with the 215X60 rear tyres, though grip and gear shift is
still a big challenge.
|
Gear - Rear 4.1:1 |
1 |
2 |
3 |
4 |
5 |
|
|
Ford Std T9 gearbox |
3,65 |
1,97 |
1,37 |
1 |
0,82 |
Ratio |
|
Speed 6500 RPM
W185/65-R15 |
50,9 |
94,3 |
135,6 |
185,7 |
226,5 |
km/h |
|
BGH E8 gearbox |
2,66 |
1,75 |
1,26 |
1 |
0,82 |
Ratio |
|
Speed 6500 RPM
W215/60-R15 |
71,8 |
109,1 |
151,6 |
191,0 |
232,9 |
km/h |
|
