Non I/c pump flow vs I/C flow

[spencerdiesel]

Anyone ever dynoed/flow tested the different cc output between the two? Non I/C pumps have different slots in the rotor right? BC when you put a new VE on your truck did you go with a Non I/C?

[RCCUMMINS89]

On a bench, in the end, they flow the same.

The highest fuel only 12mm and 14mm are from 205 pumps.

I plan on doing a hybrid pump once I get a good non i/c core again. As I believe with an i/c fulcrum lever, and a non i/c head/rotor one may get a better flow. But without testing, it is pure assumption right now.

A non i/c rotor has larger slots. with cranking case pressure, one may be able to maintain better flow with larger injectors in the upper rpm. Problem is the non i/c pumps WANT to push more fuel, but they run away too soon. They have different designed spill ports, and different fullcrum levers.

[spencerdiesel]

Makes sense to me. Why do they run away more? Could one make necessary mods to prevent runaway so soon?

[AHineman]

Spencer, I like you dude. You've brought some life back to 1stgen.org.

[spencerdiesel]

Thanks AHineman, I really do appreciate that. So many great people on this forum that are so willing to inform me of all the lil bitty Q's I got.

[fatty]

Spencer, I like you dude. You've brought some life back to 1stgen.org.

That's right. All this talk might motivate me to fix my first gen soon.

[spencerdiesel]

Is this why I've heard of most I/C trucks needing a hot screw, while the non cooled trucks (mostly?) can achieve runaway before the screw bottoms?

[RCCUMMINS89]

Yes

[CumminsPower59]

Here's some pics for reference...

114 left, 205 right.

Spill port differences...




"Slot" differences...

[CumminsPower59]

I still need to get my "franken pump" going. It's a hodge-podge of parts, 205 front half, 114 h/r, 205 d/v's. No one around me will bench test it, they all want to "rebuild" it first, for $1100

[RCCUMMINS89]

If you have run time on it, we'll bench it. I say run time, because without either knowing it won't grenade, nor us "re building it" I can't bench simply bench it. If that makes sense? Don't want to be reliable for a non ran pump on a test bench.

[CumminsPower59]

Sounds good. Ill have to swap it on one of these days when it's warmer and see what it does. I know that NOS 205 I am running now hits pretty hard, but I don't want to push it any harder, I have 46 psi going against a head held on with just 115lb-ft torqued head bolts, and no O-rings and a fair bit of timing in there too...

[spencerdiesel]

Pic helped a ton

[spencerdiesel]

I might have an opportunity to pick up a VE pump for parts/knowledge etc.....it's the version with no afc top though so would only be good for parts. It's for 6b's.

Very good shape on the exterior. Unpainted, looks new but been sitting forever. I'll be able to glean more info about it on monday. If it were in decent/working shape, anyone know what it'd be worth?