I bought two fuel pumps to replace the old ones / they were individual single outlets/ These new ones are dual outlet , can i T the matching outlets on the pump to feed one carburetor and the same for the other carb. or will that be to much fuel being pumped to each carb.
You cannot pump to much fuel with a vaccum diaphram pump. They simply dont have the pressure to overcome the needle valve like electric pumps can.
What sled are they going in? I know the 500 liquids had the duel pump setup but they really didnt need both. They had put two in because they were going for the whole fastest dled in the world thing and wide open speed runs across 5 mile long lakes would suck a single pump dry after 60 seconds of open throttle.
So really all you need is one. If you want both then i would get two rubber caps to hose clamp on each unused hose barb. Splicing it all together with T fittings is asking for leaks. Simpler is better.
Thanks for the reply. The sled is my 80 el tigre 6000 , but the engine would be a 85 500cc liquid , with two pulse lines coming from the crankcase. Any chance you could T the pulse line into one and run just a single dual fuel pump.
Not T. But cap one side and dont use it. I had a dual outlet pump on mine snd i just capped one of the pumps outlets with a piece if black rubber hose with bolt in it.... Not pretty but worked fine. Run both pumps, cap an outlet on each. If one pump ever goes bad you can swap the carb onto the other good pump to get home. Capping the outlets and using both is good insurance.
If you T the pulses together you would have no pulse because a + plus pulse, plus a -minus pulse==O pulse. ++-=0! or -++=0. Fuel pumping aside, it wouldn't run well. It would be like the center seal was bad.
Your best bet is to use just one and plug the pulse outlet from the unused cylinder.
If you want to use both pumps, T the outlets together and feed both carbs. {it will never starve for fuel again}
The pulse lines for each pump must run separately from the base.