Timing is spot on, At the altitude I'm at, it has so *little* power
anyways, you can notice a 2 degree dwell drop.
For average weather, I never even have a concern about the overheating
potential, but during htose super-hot days, at flat-out rpms, it gets right
to that point.
Greg Tobin
72 Mark IV daily driver
79 1500 garage potato
70 GT6+ 2.53 cars in boxes
-----Original Message-----
From: Craig Smith [mailto:CraigS@iewc.com]
Sent: Wednesday, October 20, 1999 6:31 AM
To: 'Atwell Haines'; Dean Dashwood; spitfires@autox.team.net;
greg.tobin@wcom.com
Subject: RE: Mark IV Radiator
What about timing ?
Have you checked it lately ?
-----Original Message-----
From: Atwell Haines [mailto:carbuff@nac.net]
Sent: Wednesday, October 20, 1999 7:19 AM
To: Dean Dashwood; spitfires@autox.team.net; greg.tobin@wcom.com
Subject: Re: Mark IV Radiator
At 09:16 AM 10/20/99 +0100, Dean Dashwood wrote:
> But for me, the fact that you're overheating at high speed and
>not at low speed sets alarm bells ringing.
Hi Greg,
I wasn't following this thread closely as I don't have a Mark IV. But it
has been stated several times on this List that you need the side valences
on the Rad to direct those cooling breezes toward the radiator at speed.
Are they installed? If not, you could try cobbling up something out of
cardboard just to see if it makes a difference.
Cheers,
Atwell Haines
'79 Spitfire (with slant-rad, factory electric cooling, and no problems)
Succasunna, NJ USA
>Date: Tue, 19 Oct 1999 14:29:51 -0600
>From: Greg Tobin <greg.tobin@wcom.com>
>Subject: Mark IV Radiator
>
> With no overdrive, at 65mph (4500rpm), 7500' elevation, and 95 deg temps
>(not now, during the summer...) it is just on the verge of overheating, and
>exhibits the usual stumbling, hesitancy, lack of power you get at that
>point. An aside, it actually corresponds with the temp guage, which is
>nice!!!
> My 10" electric fan covers almost the whole front of it, and between
>that and the regular fan, moves a tremendous amount of air, but I don't
>think the volume of coolant in this small radiator is enough (under 1.5
>gals.)
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