Doesn't vapor lock usually occur when the car is parked, or otherwise
moving slowly? The amount of heat the fuel picks up is probably
proportional to the length of fuel line inside the engine compartment.
Running your fuel line from the valence back to the engine is as long a
path as it is from the stock fenderwell entry, and it would likewise
pick up just that much heat. It would probably be better to chrome or
ceramic-coat your fuel line (and the carb float bowl exterior) so as to
give it maximum heat reflection ability. Another option is to run a fuel
return line back to the tank, with a pressure regulator, and that way
you keep the fuel circulating and it gets cooled when it gets dumped
back in the tank.
The other side of that coin is heating the fuel tank increases the
evaporative emissions if the fuel tank cap isn't well sealed. Newer cars
have gone back to a returnless fuel system in order to minimize this
effect.
Theo
-----Original Message-----
From: tigers-bounces+theo.smit=dynastream.com@autox.team.net
[mailto:tigers-bounces+theo.smit=dynastream.com@autox.team.net] On
Behalf Of Steve Sage
Sent: September 8, 2008 11:10 AM
Cc: tigers@autox.team.net
Subject: Re: [Tigers] oil coolers
Owain Lloyd wrote:
> quick question about the benefits of an oil cooler..................
>
>
....And speaking of oil coolers, in my final push to completely solve
the hot gas to the carb. problem that most (all???) Tigers have, I got
this suggestion from a hot rod shop here in Tucson, Arizona. They
suggest I install a small transmission cooler (maybe where the Alpine
and Tiger stock oil cooler goes) and run the fuel line from the pump
through that, then up to the carb. They say that several hot rodders
with vapor lock/fuel boiling issues have solved the problem with this,
and that the trans. coolers handle gasoline with no problem.. Has anyone
tried this?
Next, if the theory is correct, would a stock Alpine or Tiger oil cooler
work for this application (after being pressure tested, etc., of
course)? Stock look....cool fuel?
Steve Sage
Tiger MK1A
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