Re: SHE"S GOT LEGS>>>

[WILLIAM B LAWRENCE <ynotink@msn.com>]

My results are consistent with yours. Assuming some variance in accuracy and
considering the difficulty of reading the true difference between 2800 and
3000 rpm on the OEM tach while driving and avoiding traffic. I was showing
60 MPH at an estimated 3000 RPM with a speedo calibrated for the 4.10
gearset. The 3.54 gears should give a speed increase of approximately 16%. I
therefore estimated my true speed as 69.6 (60X1.16)MPH.

Further discrepancies could be explained by tire diameters.

I haven't had a chance to look too closely at Dave's numbers but they seem
pretty high to me. Maybe I need education.

Bill Lawrence  


On 4/25/05 6:19 AM, "James Lea" <clocks@midcoast.com> wrote:

> Bill and Dave. Your results are interesting to me as I too just finished the
> Lempert rear end installation. I checked RPM verses MPH carefully before and
> after. Before I was 60 MPH at 2800 RPM. Now I am 68 MPH at 2800 RPM both in
> OD. Is the four transmission that much different? I felt it should be a
> little faster with the new rear end. On the low end the tri carb has so much
> extra torque in first that I notice no difference what so ever.  Cheers, JL
> 
> James Lea
> PO Box 25
> Rockport Maine, 04856
> 
> 1952 Triumph Mayflower Saloon
> 1958 Rover P4
> 1962 Austin Healey 3000 BT7
> 1967 MGB MkI
> 1969 MGB GT