I would suggest that you take a look at this site before you decide
which set up to go with.
Assuming the choices with a tire diameter of 25.5 "
Also remember that the Healey motor runs best in a rpm range of about
2800 to 3000 rpm
If you get to slow the spinning mass of the engine will be slow to
react.
Rear axle ratio O/D ratio RPM Mph
3:54 28% 2000 59
2500
74
3000
89
22% 2000
55
2500
68
3000
82
3:90 28% 2000 54
2500
67
3000
81
22% 2000
50
2500
62
3000
74
4:11 28% 2000 51
2500
64
3000
77
22% 2000
47
2500
59
3000
71
You can go to this web site and put all the info that you want
depending on what size tires you have.
http://www.angelfire.com/fl/procrastination/rear.html
David Nock
British Car Specialists
Stockton Ca 95205
209-948-8767
www.britishcarspecialists.com
.
.
On Feb 21, 2008, at 7:11 AM, John H wrote:
> Listers,
>
> I am swapping tranmissions in my BN7. One coming out is a 22% side
> shift. The one going in is a 28% side shift and just rebuilt.
> Bundled with my 3.54 Lempert gear set should give me great cruising
> capabilities on demand.
>
> Question: the 22% has an enclosed area with a removable cover
> where the solenoid shaft engages and disengages the OD (to keep
> debris and moisture out, I assume) The 28% does not have this
> enclosure leaving it exposed to debris and moisture.
>
> The parts manual shows only a metal deflector (called a stone
> gaurd) in front of the solenoid. Is this correct? and is there a
> way to convert to the enclosed version, which seems safer in the
> long run?
>
> Thanks in advance,
>
> John Homonek
> Atlanta Chapter AHCA
> 1959 BN7
> 1960 AN5
> 1974 Jensen Healey
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