Dangle_kt
|
| posted on 27/5/10 at 10:26 PM |
|
|
English Axle - LSD - good BEC ratio
Hi Folks,
Was ragging my car round a local deserted car park for a closed down retail park, (i know...bad man) and wondered what I should be looking for as a
replacement diff.
I have an english axle, and I want a better ratio (I am currently at 1,000 rpm per 10 MPH in 6th) which makes anything above 70 a real headache!
Whilst I'm spashing cash on a new diff I thought I may as well get an LSD for roundabout antics!
So, what should I be looking for? I know nothing about old ford parts, and what is available!
Also, I have a snapped stud on my diff flange - are these welded into the axle casing, or are they like wheel studs and just pressed in? May as well
swap it out whilst I'm peeing about with the back end! Not that it is leaking, but I want it to be right.
Thanks
|
|
|
|
|
tul214
|
| posted on 27/5/10 at 10:31 PM |
|
|
Common English ratios are;
39 x 11 =3.54
34 x 9 = 3.77
35 x 9 =3.89
39 x 10 =3.9
37 x 9 = 4.11
40 x 9 = 4.44
Search for 'Gear Calc' and have a play.
1.6 Raw Super6 sold
|
|
|
UncleFista
|
| posted on 28/5/10 at 10:27 AM |
|
|
The studs just pop out like wheels studs 
Tony Bond / UncleFista
Love is like a snowmobile, speeding across the frozen tundra.
Which suddenly flips, pinning you underneath.
At night the ice-weasels come...
|
|
|
dhutch
|
| posted on 28/5/10 at 11:19 AM |
|
|
I want a LSD, but the bank balance says now!
|
|
|
daviep
|
| posted on 28/5/10 at 12:42 PM |
|
|
Unfortunately the english axle is not blessed with ratios which are BEC friendly. I've got a 3.54 diff and 15" wheels and get just over
10mph / 1000rpm in 6th gear.
[Edited on 28/5/10 by daviep]
|
|
|
Dangle_kt
|
| posted on 28/5/10 at 01:19 PM |
|
|
ok,
thanks guys - well then I'll get myself the worlds biggest silencer, so at least i/my passenger wont go deaf.
Topping out at 110mph isn't a bad thing I guess!! It's far to easy to redline it through the gears and then find I'm going WHAAAAY
too fast!
I'll save the LSD for another day - but might get mine rebuilt as I'm not convinced it is working right. with both wheels off the ground I
can turn one wheel and nothing happens to the other.... it should spin backwards shouldn't it?
|
|
|
dhutch
|
| posted on 28/5/10 at 01:27 PM |
|
|
quote:
With both wheels off the ground I can turn one wheel and nothing happens to the other.... it should spin backwards shouldn't it?
It depends. If the engines in gear and stationary it certainly should.
- However if the engines in neutral the transmission will take the line of least resitstance, which may well be to turn the input flange of the diff
and propshaft.
- Mine typicaly is around 50/50 when i turn the wheel. The othe wheel rotates backwards, but only at around half the speed, with the remained exiting
in propshaft rotations.
- You might just have a slightly dragging brake, or a somewhat loose nose/input bearing. Or iot may be fine and the bike gearbox just easier to turn
than a type nine.
I also find that a pair of eytnomic selective sound reducing ear plugs are a very good asset to own on a long drive. Even with a CEC and large
silencer.
Daniel
|
|
|
dhutch
|
| posted on 28/5/10 at 01:28 PM |
|
|
http://www.etymotic.com/ephp/er20.aspx
As used by the stage/venue tech industry during events.
|
|
|
Humbug
|
| posted on 28/5/10 at 01:31 PM |
|
|
quote:
Originally posted by tul214
Common English ratios are;
39 x 11 =3.54
34 x 9 = 3.77
35 x 9 =3.89
39 x 10 =3.9
37 x 9 = 4.11
40 x 9 = 4.44
Search for 'Gear Calc' and have a play.
Not sure if that is the usual way of describing diff ratios, but it seems like it should really be 39 / 11 etc. rather than 39 x 11?
|
|
|
tul214
|
| posted on 28/5/10 at 02:08 PM |
|
|
quote:
it should really be 39 / 11 etc. rather than 39 x 11?
You get the idea though
1.6 Raw Super6 sold
|
|
|
Dangle_kt
|
| posted on 28/5/10 at 02:28 PM |
|
|
arrrrrr - interesting, it was in nuetral - so maybe I have no need to be worried.
Cheers I'll certainly look at getting some decent earplugs - problem is, I doubt passengers will fancy shuving in used earplugs...even if I have
given then a wash first!
Big silencer required! 
quote:
Originally posted by dhutch
quote:
With both wheels off the ground I can turn one wheel and nothing happens to the other.... it should spin backwards shouldn't it?
It depends. If the engines in gear and stationary it certainly should.
- However if the engines in neutral the transmission will take the line of least resitstance, which may well be to turn the input flange of the diff
and propshaft.
- Mine typicaly is around 50/50 when i turn the wheel. The othe wheel rotates backwards, but only at around half the speed, with the remained exiting
in propshaft rotations.
- You might just have a slightly dragging brake, or a somewhat loose nose/input bearing. Or iot may be fine and the bike gearbox just easier to turn
than a type nine.
I also find that a pair of eytnomic selective sound reducing ear plugs are a very good asset to own on a long drive. Even with a CEC and large
silencer.
Daniel
|
|
|
dhutch
|
| posted on 28/5/10 at 03:18 PM |
|
|
quote:
Problem is, I doubt passengers will fancy shuving in used earplugs...even if I have given then a wash first!
Yeah, i also have a small stash of standard industrial disposable foam plugs.
- Regular passengers could be given a pair of etymotic's to hang onto however as there not that expensive.
- Then any others get the choice of the 'spare set' (ulitmatly no worse than sharing an in-ear headphone) or the disposable (fully
hygenic but it does limit comunication)
Daniel
|
|
|
