Mike Heelis
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Posts posted by Mike Heelis
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Hi Andy, thanks so much for your post as per above with pics of your cooler setup. That is a really professional job you have done there and inspired me to do the same with mine in the winter layup. I reckon it is the only way to go with getting some of the temperature out of the fuel. I will for sure let you know how I attack mine. One more run on 30 Oct before I disassemble.
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Thanks Mike and Roy. That is all very useful. Now researching Citreon C4 fuel cooler radiator as recommended in above thread.
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Hi Mike, Many thanks for your input to my problem. You have now confirmed my concern over the Sytec pump putting more heat into the fuel than the Bosch and I will pursue this line. I have checked the tank venting and have bullet proofed this check in the past with leaving the flap open for while after a reheat. Your Carter boost pump idea sounds to be a good one - what sort of pressure/feed does that give your Bosch and is the Bosch mounted outside of the boot? Not sure if a Bosch if I could get another one as they are out of production can be mounted outside of the boot?
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Thanks Gareth for your input about measuring amps which as above I intend doing.
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Hi John, Thanks for your input to my problem of fuel warming. Your chart and measurements are really interesting and useful - thanks. My PRV return goes straight into the swirl pot at the bottom of the fuel tank. Previously I have had it placed to the other side of the tank from the swirl, but this did not seem to have any effect on my problem. I will be measuring the fuel pump amps consumed this coming week and that to will be interesting. I hear you about the volumetric change and cannot dispute the science. However I have had the car for 10 years and believe that this is what I have been seeing. Your main pump body temp is the key one for me as I believe that this is where my heating is coming from with warmed fuel feeding the pump which in turn warms the fuel again on the way to the PRV back to the tank and back again = vicious circle of temp increase.
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Hi Andy,
Thanks for your swift reply. My understanding is that there is no high flow return from the MU to the tank as the outlet is in the drive from distributor cavity. When I disconnect that return line at the tank there is very little fuel in the line. Also it is very small bore. Perhaps I am wrong. I have fitted a cooler of sorts in the Malpassi to tank return line (see pic). Trouble is that there is no air flow in the boot to act on the return pipe. I am running a fuel pump relay and have upgraded the wiring - good point though.
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Hi All, Can anyone help me on the subject of fuel in the tank heating up? The story goes that on a single 480 mile run down from Scotland my old Bosch fuel pump was cavitating on arrival home with just over a third of a tank of fuel. Foolishly I decided to change it for a replacement in the boot set up with a Sytec pump, Sytec bullet pre filter feeding through a Malpasi diaphragm PRV correctly set. On another long trip the car cut out due to the new set up overheating at half a tank (no pre warning cavitation). Not happy so I got a refund for that set up and fitted an outside pump and filter (from a reputable TR supplier) with the same arrangement. This also failed on overheat, but I sorted out the Low Pressure feed to the pump to obviate any requirement for the pump to suck. Out of interest I have fitted a fishtank temperature gauge to the outside of my fuel tank (with bluetack). Seems I still have the heating of fuel issue as on a 1 hour run the temperature at the tank gets up to 36 degree's C. I know the fuel has always warmed even with the Bosch pump as after parking the car post a good run the fuel gauge is always lower when I go to start up from cold again. Can anyone help by making suggestions of how I can prevent my fuel in the tank from heating up? It is not from the exhaust as I have put heat shielding above the silencer on the boot floor. I am running a Sytec HP 3979.1 pump fed through the Sytec Bullet and also a mainline pressure filter into the Malpasi set at just over 100 psi.
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Thanks Peter - looks like a convenient and easy way to apply. Great to have the link to.
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Hi Stuart, That is very useful and makes a lot of sense. Thanks. Mike
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What is the best medium to use as a seal between wing and body when refitting a wing after refurb. There are many options out there, but I would like to hear what the experts recommend please. Thanks.
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I have Mazda MX5 seats bolted straight to the floor. I am 6 feet 5inches plus and have covered loads of distance touring in my 6. More room would be ideal, but rear wheel arch intrudes to prevent more backward travel of seat. Would be interested to hear how you get on with not padded fibreglass. Good luck. Mike H
Fuel pump and filter routing
in TR6 Forum
Posted
Hi Andy, Now fitted up my fuel cooler in response to your lead. I have it under the right wing with Sytec pump under the left wing. Waiting for the spring and summer 23 to proof test it.