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jdemaris fuel injection question

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buickanddeere

04-23-2008 10:02:08

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I'm tinkering with a PH1W 3-7/16"X4.33" Krislar Petteroid which used the A series Bryce pump. When looking through the charts, is the pump capacity rated per 100 strokes?
I worked the math through and must be mistaken somewhere. A 8mm element in a 7mm stroke 195ml pump can't move 2.9 gallon and hour on a four stroke running 1800rpm? Can it? That would support 50HP or slightly more?
It seems like way too much flow for a 10HP PJW's 3-13/16" X 4.33" sized engine's injection system? And looking through the replacement elements and delivery valves in catalogs. There must be some sort of generic drop in replacement elements for the Scintilla & Bosch pumps that are larger than 13mm? Bryce, Lucas, Scintilla, Bosch, MICO all seem to look very very similar.....?

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jd b puller

04-23-2008 18:40:15

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Re: jdemaris fuel injection question in reply to powerhouse, 04-23-2008 10:02:08

buickanddeere said: (quoted from post at 17:02:08 04/23/08) I'm tinkering with a PH1W 3-7/16"X4.33" Krislar Petteroid which used the A series Bryce pump. When looking through the charts, is the pump capacity rated per 100 strokes?
I worked the math through and must be mistaken somewhere. A 8mm element in a 7mm stroke 195ml pump can't move 2.9 gallon and hour on a four stroke running 1800rpm? Can it? That would support 50HP or slightly more?
It seems like way too much flow for a 10HP PJW's 3-13/16" X 4.33" sized engine's injection system?
similar.....?

B&D, a diesel pump will pump 2-3 times more than the engine could ever use. I believe it uses the diesel for lube/cooling of the pump itself.

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Bigblock

04-23-2008 18:36:58

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Re: jdemaris fuel injection question in reply to buickanddeere, 04-23-2008 10:02:08

Yeah,that 6.2 would blow up way before it used 11.2 gallons!LOL

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jdemaris

04-23-2008 11:21:05

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Re: jdemaris fuel injection question in reply to buickanddeere, 04-23-2008 10:02:08

I haven't got a clue - and I'm no math wiz either.

But - a pump on a GM 6.2 diesel is capable of flowing 11 gallons per hour - and that's on a 148 horsepower engine with 379 cubic inches.

I have a GM-Standyne fuel delivery chart here that gives a few flow specs per plunger size and stroke.

The GM 6.2 diesels (Stanadyne DB2 pumps) use dual-plunger pumps that are 7.1 mm each, with a max. stroke of around 8 mm. So, that's about twice of what you're talking about. They are rated per stroke - which is 50 cubic mms. at full fuel position. Being a V8 four-stroke engine - 6.2 diesel at 3600 RPM - fires (strokes) 14,400 times = .1872 of a gallon per minute, 11.23 gallons per
hour at full fuel. Obviously, the engine can't ever use that much fuel - but that's the max setting and max. horsepower is 148.

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