Trike, which diff ratio?

[Wulfgar_SDL]

Hi all you trike bods out there, i'm building a Kwak gt750 trike, and intending to use a wishbone set up.

I've been looking around for a diff and half shafts, what ratio would you recomend for the diff?
I've been looking at Sierra/Granada, are there any other cheap usable makes you could recomend, and do you have one going spare?

I also need to be able to get hub hangers (uprights) for which ever one i use.

Wulfgar

[xjtriker666]

try m+k engineering m8 they build kit cars..langold worksop notts.....type in that name an web sites runnin ,,prices r on there as well everything ya need fer trike back-end....find what gear ratio ya bike is then match it up wi sierra diff......ford will sell ya gears fer diff about 300 quids new.. or ask m+k to match the gear ratio up for ya.. if thats wot ya want.....

[Wulfgar_SDL]

try m+k engineering m8

Cheers m8, was planing on getting the wishbones from them anyway.

Just wondered if their was a suttable diff i could grab off the shelve at the local breakers. :)

Wulfgar

[mark4x4]

hi i have triked 2 gt750 s so far and they run spot on with 1600 seirra diff unit, i have tryed 1800, to high geared. :)

[Wulfgar_SDL]

hi i have triked 2 gt750 s so far and they run spot on with 1600 seirra diff unit, i have tryed 1800, to high geared. :)

Thank you, thank you, thank you.

Thats exactly the info i needed.

Wulfgar

[Alik Windrush]

Don't bother with a Granada axle on account they have 5 stud hubs and you'd have to pay loads for wheels

[Mark]

hi i have triked 2 gt750 s so far and they run spot on with 1600 seirra diff unit, i have tryed 1800, to high geared. :)
Be careful, it will also depend on your total wheel and tyre diameter.
Check out these websites:
http://www.tirerack.com/tires/tiretech/general/size.jsp

http://pw1.netcom.com/~sgalaba/mph.htm


Using these you can calculate speed to revs.
Don't forget its total diameter inc. tyre that counts

[Mark]

Also its getting very hard to source Sierra diffs, all the kit car boys want them!

Try these guys:

http://www.classicconversions.co.uk/fordstandard.htm

I've been looking for a 3.02 or a 3.14 for months!

[Wulfgar_SDL]

Seems to me that sierra 1.6 diffs, are as rare as rocking horse S*it. :mad:

Ok so we know the sierra 1.6 diff works with the kwak gt750, what i need to know now is, what is the standard ratio for the sierra 1.6 diff?

If i can't get a sierra one i will try and find a diff from another car with the same ratio.

I took a look at classic conversions, nice but out of my price range.
This trike is being built on such a tight budget, it squeeks :)

Wulfgar

[Mark]

Seems to me that sierra 1.6 diffs, are as rare as rocking horse S*it. :mad:

Ok so we know the sierra 1.6 diff works with the kwak gt750, what i need to know now is, what is the standard ratio for the sierra 1.6 diff?

If i can't get a sierra one i will try and find a diff from another car with the same ratio.

I took a look at classic conversions, nice but out of my price range.
This trike is being built on such a tight budget, it squeeks :)

Wulfgar

Diff ratios vary widely on all fords, they did a 2.7 (cosworth) if you got one of those, well I'll swap my 3.36 for it... they did a 3.02 a 3.14 a 3.36 a 3.62 a 3.82 a 3.96 even a 4. something, so there is no standard one.... its easy to tell what ratio any you find are, there is a thin metal tag about 1"x1/2" attached to the diff. there are a load of letters/numbers, but one will say 3. something on it.. the higher the number the lower the diff ratio e.g. a 3.36 (mine) will give higher revs then a 3.14 with the same diameter wheels & tyres.