[Healeys] High rpm's plus COOLING UPDATE

[M Lempert]

Got back from Conclave a few days ago and needed about three days to recover 
from the ride.  It was approximately 2500 miles round trip.  Absolutely no 
cooling issues whatsoever.  Got a good test on the way up. I was caught in 
three traffic jams (as Oritt warned) on route 95 - all in the northern Va, 
DC and Southern Maryland area. Temps were easily in the 90s, or at least 
felt that way.  The gauge never went above 190 degrees. No vapor lock. 
During driving, the temperature never went above 160 degrees, and in cooler 
weather it stayed below that mark.  At one point I had lost water through a 
loose bolt where the generator is bolted to the block (apparently those four 
bolts go into water). I had actually lost quite a bit of water before I 
discovered it, but no cooling problems occurred.

Now back to the original thread subject...  I had estimated my speed at 
certain RPMs because my speedo has not been recalibrated since replacing the 
diff with my 3.54.  Of course I can't be sure how close to accurate it was 
even before that.  I kept up with traffic very well at 2700 RPM, lost a 
little ground at 2500 RPM and was in mild passing mode at 3000 RPM - all on 
route 95 where driving is fast and furious.  I figured about 75 MPH at 3000 
RPM.  Now I've checked it out on the web page Nock provided and it seems I 
was going faster than I thought.  It tells me I was doing 81.5 MPH at 3000 
RPM and 73.4 MPH at 2700 RPM where the car seemed to be very comfortable. 
Geeze, was I driving that fast ?  In my calculations I put the final ratio 
at .778 (28% OD) and my tire diameter at 25.2" (Vredestein 185/70-15).  Does 
this sound right ?  Car is a BN2 with 3.54 rear end.

Regards,
Mike L.

> Date: Fri, 6 Jul 2007 11:17:42 -0700
> From: David Nock <healeydoc at sbcglobal.net>
> Subject: Re: [Healeys] High rpm's
> To: "Ned Smith" <smithn00 at kitepilot.net>
> Cc: RAntal243 at aol.com, Healeys at autox.team.net
> Message-ID: <097E8C6D-4C60-423B-8466-AA70928F99E5 at sbcglobal.net>
> Content-Type: text/plain; charset="us-ascii"
>
> http://www.angelfire.com/fl/procrastination/rear.html
>
> There is an easy way to solve all this. This site you can put in all
> the numbers you want and find out how fast you are going at what rpm.
> Then you will no if it is the tach or the speedo.
> Check it out we use this all the time when we are changing tire sizes
> and rear axle ratios.
>
> David Nock
> British Car Specialists
> Stockton Ca 95205
> 209-948-8767