Miata Mailing List: June 1994, Message #174
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   From: kenw@netaxs.com (Ken Warren)
Subject: Re: rev limiter?
   Date: Wed, 8 Jun 1994 15:53:29 -0400

At 02:33 PM 6/8/94 -0400, Eric Jacobs wrote:

>I was thinking about performance chips and thought perhaps the easiest
>parameter to change would be the rev limiter.  Can this be done easily
>(perhaps without changing the CPU)?  I come up against the 7250 rev 
>limit frequently (1st mostly, sometimes 2nd).  It is rumored
>that the Miata engine is easily capable of 9000 and some have even
>said 11000 as the top end.

This is just opinion, not backed up by anything, but I'd suspect that above 
about 9,000 rpm, you'll start to get valve float. That makes the effective 
top end 9,000. However, if you look at the power curves for the engine, 
you'll see that your hp starts peaks at about 6,500, with torque peaking 
even lower. There's no point in revving an engine past the point at which 
you can match power as you upshift, so leaving the rev limiter at 7300 (or 
whatever yours is) shouldn't make a real difference.

--
Ken
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           Ken Warren               E-Mail: kenw@netaxs.com
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Finger me for the current Philadelphia Region SCCA Solo II schedule...