[Healeys] High rpm's plus COOLING UPDATE

Ron Osowski rosowski at tampabay.rr.com
Sun Jul 8 20:11:25 MDT 2007


Be sure to use the "rolling diameter" of the wheel/tire...measure straight 
up from the ground to the center of the knock-off and double the 
measurement.
----- Original Message ----- 
From: "M Lempert" <mlempert at bellsouth.net>
To: "Healey List" <healeys at autox.team.net>
Sent: Saturday, July 07, 2007 10:18 AM
Subject: Re: [Healeys] High rpm's plus COOLING UPDATE


> 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
> _______________________________________________
> rosowski at tampabay.rr.com
>
> Healeys at autox.team.net
> http://autox.team.net/mailman/listinfo/healeys


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