It probably makes more difference if you try to average 80+ mph (on I-5 in
California, for instance). At that speed the non-OD MG is well out of its
powerband and struggling (assuming the driver can even tolerate the howl).
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the primer red one with chrome wires
on 1/15/08 2:52 PM, Aaron Whiteman at awhitema@panix.com wrote:
> On Jan 15, 2008, at 2:32 PM, Charles & Peggy Robinson wrote:
>
>> Tell John Twist. He thinks overdrives are strictly "feel good"
>> add-ons.
>
> That corresponds to my anecdotal experience.
>
> Dads 1978 MGB got 28-31 MPG @ 70 mph on extended trips. It had no
> overdrive and ran all day at 4000 rpm (or more, I don't remember the
> exact figure).
>
> My 1975 MGB gets 26-30 MPG on the same trips. It has overdrive and
> runs at say 3500 rpm.
>
> The '78 had a 25D distributor and a downdraft weber and was recently
> rebuilt (less than 20K miles). The '75 has a 45D with pertronix and
> dual SUs, but is pretty tired. I need to get over and buy dad's car,
> if only for the engine.
>
> My experience says the OD doesn't matter one bit regarding mileage,
> but when my OD broke and would not engage, it was disquieting for me
> to listen to the engine at the higher revs--even though I knew it was
> just fine.
_______________________________________________
Support Team.Net http://www.team.net/donate.html
Mgs@autox.team.net
http://autox.team.net/mailman/listinfo/mgs
http://www.team.net/archive
|