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already sent by (output started at [ROOT]/includes/functions.php:3887) RS Motorsport :: Classic Speed Restored • View topic - Fuel Tanks
Roger's setup, (2 pumps and header 'swirl' tank) with minor variations, is the standard design that reliably overcomes all the issues with a low tank installation.
If you have a high mounted tank a single pump arrangement is possible provided there is a substantial well or sump for that pump to draw from. Otherwise to guarantee a solid head of fuel there is no other practical way to run than with a header tank.
Regarding the Carter pumps there are 4 models that are commonly encountered. 2 are called Silver tops models 4070 5 psi 4594 7 psi. and the 2 we are interested in a Black Tops. These have 3/8" fiiting ports and high flow compared to Facet anythings. The 4600HP will flow 100 gallons an hour at 7-8 psi and the 4601HP 100 gallons an hour at 15-16 psi. They need regulators for carby work. Red Top Facets are rated at well under half this. For no other reason than their power it is good to use them. If you do suffer fuel starvation, when the pump does start sucking/pushing your float bowls are going to be full a lot sooner.
Fuel pick-up is via that small bowl at the bottom (which is fed via three 10mm holes in the main tank). The last Khana I ran only 5ltrs of fuel (guage showed empty) and had no surge problems with twin webers. And that event had two tight right into immediate lefts and one long right hander to test the pick-ups abilities
Came as a complete kit - tank, stand, straps, splash bowl, fuel sender ring, -8 feed, -6 return pipes. Back in Nov 2009 I got the first one for 240 GBP, as per Glenn's email we did order another 3 last year which were slightly more.
I have run a few tight sprint events with sub 10litres and never had any fuel issues so I guess that little sump pot does the job.
I did notice during Targa Adelaide Paul that the baffles might not be all that good as the fuel guage went right up and left handers and way down on rights (tube type sender). I suppose the baffles are there to slow the fuel slosh and not to stop it completely. Have you noticed anything similar?