It just depends on the circuit.
For example, at Eastern creek, here in Sydney,
1. if you drove my Healey, and you didn't use overdrive. And;
2. I drive my Healey, & use o/d. And..
3. we were of identical competency as drivers,
A. I'd probably be about 10 seconds a lap quicker than you....
With a 4.1:1 diff, in overdrive top: I have to lift off @ over 6000
rpm on the main straight.
With a 3.9:1 diff, I don't. Close, - it'd like close to 6,400.
With no overdrive, you'd get passed like you were standing still. (in
an identical engine spec Healey, with the same gearing, but if he had
overdrive)
Sent from my iPhone
On 08/11/2010, at 3:21 PM, Richard Collins <gonnagitcha90@hotmail.com>
wrote:
> My $.02:
> I drive an 89 930 on the track and a 1960 BN7 with OD in the back
> country;
> (Just DE's, not as a pro...) I did 75 backcounty KY miles in the
> Healey with
> another Healey (BN7 with OD) this PM. I was constantly on/off the OD
> but
> mostly off except on straight runs at speed in 4th and some 3rd.
> Rarely kept
> OD in play on curves except for long sweepers...
> I had some thought about tracking the Healey as my car's history
> seem to have
> been a track car way back in the Bay area.
> It was originally imported without OD per the BHC but now has a top
> shifter
> with OD. Except for front straights, I suspect the OD is really not
> a factor
> on a track. I may track it next year to try it, so may eat my
> comments, but
> suspension and driving technque would seem to be more important than
> worrying
> about OD (except for long straights of course).
> I think "drive it like ya stole it"
> Richard of KY 1960 BN7 #440
>
>
>> Date: Fri, 5 Nov 2010 06:31:53 -0700
>> From: gmandas@yahoo.com
>> To: healeys@autox.team.net
>> Subject: Re: [Healeys] Rich ? overdrive
>>
>> Newbie Here!!!!
>>
>> Ok, I paid my $100 and spent a weekend driving around Mid-Ohio
>> Raceway when
> I
>> owned a '79 BMW 528 and that's my track experience.
>>
>> Overdrive in competition!?!? Something I never though of or about.
>>
>> It sounds hard on an OD and makes me think I baby mine a bit much,
>> which I
>> will continue to do because I don't want to rebuild my OD, ever,
>> something
>> racing owners do all the time.
>>
>> Could you talk about it a bit more? How is it used on the track?
>> When/How
> do
>> you shift in/out of OD? What's the though about cornering with the
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