Perhaps the info in this post on the AlfaBB might be useful? It is from a
1987 article in AONE by Fred DiMatteo.
http://www.alfabb.com/bb/forums/263040-post22.html
Eric Russell
Mebane, NC
----- Original Message -----
From: "alfa-digest"
Date: Tue, 7 Aug 2012 09:40:53 -0400
From: Bruce Giller <[email protected]>
Subject: [alfa] Re: over pressurized fuel tank at the track
Folks,
After much consultation with fellow List members concerning just might be
going on with my GTV, I do have a very good inconclusive report to make.
I
checked and double-checked all the hoses and connections that relate to
the
fuel tank. They are all clear and seem to be hooked to the correct
connections (John Fox sent me a copy of Alfa's write up of the vapor
recovery system). In the engine compartment I found the oil separator not
to be clogged and all the hoses clear as well. The very small tube from
the vapor recovery tank is to allow the vapors to liquefy and be returned
to the fuel tank rather than sucked back into the cylinders. The vapor
recovery system seems to in good shape in that it is hooked up correctly
with no obvious defects.
My guess-conclusion is that the fuel tank is great at accumulating heat on
a hot day at the track but not great at lowering the pressure quickly. My
ideas to reduce the temps at the track will be:
1. vent the tank to the atmosphere with a 'T' fitting and a valve;
for track use only
2. install a heat shield between the rear exhaust and the tank
3. run with at most 1/2 a tank of gas at the track
Thanks for all the help!!
Bruce
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