cougar

Can't be any worse than what I got. But, if I do need to up the pressure and volume later everything is already in place.

stillsmokin209

Well I have had the cummins spacer in for a few days not and everything seems to be fine. Its making 10psi at idle now so that's better than it was. It seems like you could use a thinner spacer since alot of stroke is left on the pump. When I had it off the block but still hooked up to fuel, if I pushed the plunger I saw anywhere from 15 to 30psi on the gauge depending how far I pushed it. I am going to try another gauge, since this one has just been laying around for awhile. If I feel that I need more, I have a holley pump that will be feeding the piston pump.

cougar

How much clearance do you have left to the block with the pump installed?

stillsmokin209

The cummins spacer and gaskets total 1/4", roughly. I would like to try using no gaskets and just a coat of RTV.

cougar

Watch it close. I never had any luck with RTV. It never stood up to fuel or oil very long. I have also seen RTV travel through an aircraft engine and really screwed it up. I've had a lot better luck with Permatex and a thin paper gasket.

stillsmokin209

Permatex anaerobic gasket maker works, whatever floats your boat though. Long as you were to lose the gasket really is all I was implying.

Douglas2

hey-Hey!!!,
Since you've got two flat mating surfaces and adequate clamping force let me suggest a visit to a Porsche shop for the sealant used on the two crank case halves. No gasket required and I am certain the air-cooled flat sixes expose that joint to more heat and oil than what you'll find at the 6BT's fuel pump. I'll make an edit with the PN of the Locktite goo when I get home.
cheers,
Douglas

bgilbert

The spacer is used for a reason. Without it will cause damage to either the camshaft fuel pump lobe or the pump itself.

stillsmokin209

That is correct, and I am aware of this. Hence why I said it may be a possiblity to lose the gaskets in place of a thinner coat of your favorite sealing compound.

Exekiel69

Maybe You did this already but have You checked there is nothing blocking the flow to the pump? I have a separate water separator on My fuel system before the pump and the filter was clogged big time reducing the pressure to 4psi or less and 0 under acceleration.

stillsmokin209

It's just the stock fuel line feeding the pump, so no filter that I'm aware of to be clogging the line pre-pump. I will check it out though. I also have a holley blue that I may install with a check valve in a bypass line on a swtich. That way I can run the holley when I want and it will just feed directly into the piston pump, but turn it off at will. Also this way if the holley were to die on me, the mechanical is still functional.

dodgenstein

There is a screen built in the inlet fitting to protect the pump from debris. Be sure it is clean.

stillsmokin209

I will check it out good sir, thanks

Mieser

Some interesting ideas. I was wondering the other day if one could shim the spring in the pump slightly to 'tune' pump pressure? This combined with the larger diameter piston of the 2nd gen pump could be interesting.

The VE pump is rated for 20psi at the pump inlet correct?

ARbowhunter7

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