Just looking at the numbers, if a 0.47 OD is applied to a final drive (rear
axle ratio) of 4.10 you would be effectively at 1.93. Unless you are running
at the salt flats that axle ratio will not be useful on the street or highway.
Actually I'm not sure anyone runs a ratio below 2.00. The horsepower and
torque curves of the Healey engines will not work with this set up. Its tough
to climb a hill on US 40 (at or near the speed limit) when your Healey RMP's
read somewhere near idle. Just saw a some what related example of this on one
of the Supercar shows on the Speed Channel. A Viper, that has lots of HP and
torque, falls flat in top gear because the gearing is just not quite right.
The Vette on the other hand had a slightly different set up and powered by in
top gear. Although I would like to drive either at 180MPH.
Aloha
Perry
-----Original Message-----
From: Curt/Nancy Arndt <cnaarndt@gmail.com>
To: Jose Vicente Vargas <jvvmusme@yahoo.com>
Cc: healeys@autox.team.net <healeys@autox.team.net>
Sent: Mon, Dec 13, 2010 8:09 am
Subject: Re: [Healeys] Any update on the 6 speed conversion ? BN2
Listers,
Yes I know we're talking about transmission transplants but this also brings
p the subject of final drive ratios. I have a 3.54 rear end for my BN1 and
thers that have installed them in their BN2s loved them, especially for
ong distance cruising. I'm curious as to the final drive ratio when
witching from the stock 4.11 rear given this quote...
But jumping from 1:1 to 1:0:47 in 1 gear is too much...>*
Does anyone have these numbers? Mike Lempert?
Cheers,
Curt
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