ManwithSupra Posted April 16, 2012 Share Posted April 16, 2012 Hi All, I need to make a heat shield for my fuel tank. As some of you may know I do not have a standard tank and a standard exhaust system (in how its routed down the car), The last part of the exhaust passes just below my tank and whilst the pipes are wrapped I think the tank is getting too hot on longer journeys (I have excessive pressure building up in the tank). Does anyone have any suggestions on what is the best heat barrier material to use, I have done a lot of research on what material to use but as this is the tank I want to use the best I can find. Looking on the net and on forums I get a lot of conflicting statements about the different heat barriers so need some guidance. I was thinking of putting reflect-a-gold on the underside of the tank with a panel of Nibus lite shield between the already wrapped exhaust and the tank. Does anyone else have any experience with the above products or suggest alternative products? Quote Link to comment Share on other sites More sharing options...
pedrosixfour Posted April 16, 2012 Share Posted April 16, 2012 Has the charcoal canister been removed mate? (I'd be damn surprised if it hasn't ) I've noticed with mine after I blocked the pipe from the tank (as was recommended) that there was serious pressure building up in the tank. The only way around it (as far as I can see) is to have a proper motorsport type tank vent fitted. Something like this is what I'm going to fit: http://www.demon-tweeks.co.uk/motorsport/fuel-tank-vent-valves/mocal-in-tank-breather-valve-3 This may not be the only reason (if at all) you are getting a pressure build-up in your tank but it may be something to investigate as well as the heat shield. Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted April 16, 2012 Author Share Posted April 16, 2012 Has the charcoal canister been removed mate? (I'd be damn surprised if it hasn't ) I've noticed with mine after I blocked the pipe from the tank (as was recommended) that there was serious pressure building up in the tank. The only way around it (as far as I can see) is to have a proper motorsport type tank vent fitted. Something like this is what I'm going to fit: http://www.demon-tweeks.co.uk/motorsport/fuel-tank-vent-valves/mocal-in-tank-breather-valve-3 This may not be the only reason (if at all) you are getting a pressure build-up in your tank but it may be something to investigate as well as the heat shield. Hi Mate, Thanks for the reply, yeah the charcoal canister has been removed, looking at the hanger assembly of the tank it already has one of those tank vent valves, perhaps its not working properly either that or the exhaust is heating the tank and is overcoming the release capacity of the valve. Going to have a look tonight, also going to check the fuel return line to make sure there is not a blockage in there, although I would have thought it would not increase the tank pressure very much if there was. Quote Link to comment Share on other sites More sharing options...
pedrosixfour Posted April 16, 2012 Share Posted April 16, 2012 I'm not very well versed in the workings of the vent mate but as it is designed to stop the fuel from escaping the tank in a roll-over I can only surmise that the orientation of the vent would be critical, if not altogether evident. Or I could be talking absolute poo about a problem that doesn't even exist, as is so very often the case. Quote Link to comment Share on other sites More sharing options...
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