[Healeys] Rear axle ratios

Bob Spidell bspidell at comcast.net
Tue Feb 21 09:22:53 MST 2017

I have std. 4.1 in my 100M--it definitely gets off the line well--and I 
put a Lempert gearset in my BJ8.  The M isn't comfortable to drive much 
over 70MPH, and I generally observe the 4K RPM 'red line' for the 
100s--crank failures can happen above that--but it's a hoot driving the 
mountainous roads around the SF Bay Area.  The BJ8 is the better touring 
car, but it does take some finessing to get it off the line 
(surprisingly, dumping the clutch relatively quickly but smoothly works 
the best, but sometimes I have to slip the clutch more than I like).

I think a 3.9 might work well for an 'all-around' car, since the taller 
OD helps for cruising, but if you're looking at mostly highway miles the 
3.54 would be the way to go.  I remember Gary Anderson (I think) once 
saying a 3.54 with the 28% OD might be the best arrangement of all, but 
you'll lose some quickness.


On 2/21/2017 6:33 AM, goldengt wrote:
> Depends on where you live.  Standard gears is a perfect compromise for 
> me in California.
> Ken Freese
> Sent from my Verizon, Samsung Galaxy smartphone
> -------- Original message --------
> From: Curtis Arndt <cnaarndt at gmail.com>
> Date: 2/20/17 10:45 PM (GMT-05:00)
> To: Chris Scholz <drscholz at visioncenterpc.com>
> Cc: healey list <healeys at autox.team.net>
> Subject: Re: [Healeys] Rear axle ratios
> I agree, the 3.54 ratio is the way to go.  I'm bringing my rear end 
> down to Pro-Gear in San Diego tomorrow to have my Lempert set 
> installed.  I also have an original set that I picked up in Australia 
> from Robby Roland at the Healey Factory 20 years ago.
> Curt
> On Mon, Feb 20, 2017 at 7:18 AM, Chris Scholz 
> <drscholz at visioncenterpc.com <mailto:drscholz at visioncenterpc.com>> wrote:
>     I switched my 4.11 to 3.54 and was very pleased.
>     Sent from my iPhone
>     Chris Scholz OD
>     On Feb 20, 2017, at 8:36 AM, Jonathan Einhorn
>     <einhornlawoffice at gmail.com <mailto:einhornlawoffice at gmail.com>>
>     wrote:
>>     I'm restoring a 100-4 and have several rear axle ratios: what is
>>     the best one for street driving? What was standard? Yes, it's got
>>     OD.
>>     thanks
>>     jon

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