Quick question regarding facet solid state pumps how do regulate the pressure as they do not see to stop like a interuper pump.

They regulate pressure by a regulator on the return to the tank.

I dont think the question was about a fuel injection type pump.The Facet low pressure pumps probably use the build up of pressure to hold the outlet valve off its seat or to reduce the travel of the internal plunger, my red top pump never stops but does slow up if blocked and makes a different noise as the pressure builds up.
Paul

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Originally posted by MakeEverything
They regulate pressure by a regulator on the return to the tank.

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I am talking about the carb solid state pumps I have a 2.5-3psi pump for my r1 carbs.Fitted it with no regulator and although it seems to run alright I have no fuel return and was woundering how it is working.
thanks Matty

fit an inline regulator

I have a filter king would this do the job.

Use a carbed bike pump

I changed the Facet pump on mine to one of Electronic Fuel pump MGB on eBay (end time 16-Jan-11 21:47:52 GMT) it is an interrupter and stops when up to pressure, it delivers about 3 - 4 psi.

I had the same pump on my last car with ZZR1100 carbs, and have used it on this one with DCOEs and now SUs, no problems at all.

The banjo fittings can be a little pricey being the only -ve.

Do not really want to change the pump only put the facet one on yesterday .Car was running fine just woundered if it needs a regulator,