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Re: Effect of heat on fuel delivery

To: british-cars@autox.team.net
Subject: Re: Effect of heat on fuel delivery
From: Andy Ashworth <tcsaca@aie.lreg.co.uk>
Date: Mon, 29 Nov 93 10:46:16 GMT

The problem with heat and fuel delivery that Dan Parslow describes is very
similar to my own experiences with a 1500 Spitfire.
 
> For about 20 to 60 minutes
> after parking the car when it's quite hot, restarting it is a
> real beast of a job...seems like fuel starvation. 
> 
> Let it cool for more than an hour and it starts great... or don't
> let it sit at all but restart it within a couple of minutes and
> that works too.  But leave it for a middling amount of time 
> when it's up to temperature and experience an embarrassing amount 
> of cranking and pumping when you try to start it again.
> 
The problem on my Spit was simply radiated heat from the exhaust manifold
causing the fuel in the carb float chambers to vapourise. This also occurred
when stopped at junctions. The addition of a heat shield as originally fitted
greatly assisted.

-------------------------------------------------------------------------------
Andy Ashworth
Lloyd's Register                        email:  tcsaca@uk.co.lreg.aie
29, Wellesley Road                      Phone:  +44 (0)81 681 4040 ext 4510
Croydon                                 Fax:    +44 (0)81 681 4839
CR0 2AJ
 



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