Miata Mailing List: June 1993, Message #120
sponsored by



     


   From: Andy Poling 
Subject: Re: Optimizing Shift Points - Info required
   Date: Tue, 29 Jun 1993 12:27:30 -0400


On Tue, 29 Jun 1993, Miq Millman wrote:
> Craig Boyle says:
> > Does anyone known Miata torque and hp ratings through the rpm range, say
> > from 2000-7000 in 200-500 rpm increments. I need this data for accurate
> > computation.
>
[...]
> But anyone who has raced a Miata in any form will tell you to shift as late
> as possible to take advantage of the high rpm power.  Last track event I
> experimented (at the request of my instructor) with changing shift points.
> The results were shifting at 7000 was a couple of seconds faster than
> shifting at 5500.  The increase in lap times was pretty linear with the delay
> of the shift point.

I'll say.  When I started holding first 'til 7K, the leap forward when I
hit second gear was surprising too.  It really places you much better in
the power curve for the next gear.  I think that alone (and just on the
start - Harrisburg courses are pretty much second gear all the way)
lowered my times about 0.5-1 sec.

I guess I'll have to raise my launch from 3K to 4K RPM when I get sticky
rubber on there.  Hmm.. I'm gettin' up there...

-Andy

Andy Poling                              Internet: andy@jhunix.hcf.jhu.edu
UNIX Systems Programmer                  Bitnet: ANDY@JHUNIX
Homewood Academic Computing              Voice: (410)516-8096
Johns Hopkins University                 UUCP: uunet!mimsy!aplcen!jhunix!andy