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P7100 fuel output vrs VP44 output.

Old 12-03-2006, 10:15 AM
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P7100 fuel output vrs VP44 output.

I asked this question 3 years ago and no one had an answer. More conversions out there now so I thought I'd try again. Has anyone figured out a way to compare fuel output between the two pumps. Or a hp comparison between a P7100 set to flow a certain number of cc's vrs a vp44 with the various add ons(smarty, drag comp, etc). It seems that it takes around 400cc of p7100 to get around the 600 mark with Mach 6's. That's around 1.5hp per cc. I think 520cc or so is the limit for a 215 pump without going to larger plungers and barrels.That would figure to 780(probably probably more like 730). What kind of #2 only numbers are the vp44's putting out?
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Old 12-03-2006, 11:06 AM
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I dont THINK anyone has made over 700 on just #2 with a VP44 yet.
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Old 12-03-2006, 03:04 PM
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On #2 only you usually see between 630 and 660 off a vp. Thats with the best mods. The p pump can go over 1k with good mods.
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Old 12-03-2006, 06:41 PM
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Originally Posted by natlchamp2k4 View Post
I dont THINK anyone has made over 700 on just #2 with a VP44 yet.
1 man...Idaho CTD, Nathan Wright...700.1HP VP44 #2 only!!

There are a few more in the mid 600's!

Chris
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Old 12-03-2006, 07:27 PM
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I'm going to start a rumor here. I've heard that some people are working on VP's that will flow a lot of fuel, and it isn't an HRVP.
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Old 12-03-2006, 09:05 PM
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Originally Posted by 95ram View Post
I'm going to start a rumor here. I've heard that some people are working on VP's that will flow a lot of fuel, and it isn't an HRVP.
if that is true, that would be awesome.
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Old 12-03-2006, 09:08 PM
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ill bite...

ok i want a link! come on, if someone is doin that they will have a site right?
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Old 12-03-2006, 09:19 PM
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I asked Brian Block if you could put bigger plungers in a vp like he did in his ve(627 hp on fuel) he said it could be done but there are twice as many, and it still didn't fix the electronic issues. And with common rail making big power and p pump conversions on 24v for competition I wouln't expect to much inovation to continue on the vp.

Also even if you get it to move more fuel youll never get it to move fuel like a p pump spinning alot of rpm. a p pump strokes at half engine speed while a vp is the same so you would have it turning 6000 rpm at 6000 rpm on the motor while a p pump would only be turning 3000.
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Old 12-04-2006, 02:52 AM
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P-pump is king of quantity, though VP generally offer more power for a given quantity of fuel (better efficiency).


jmo
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Old 12-04-2006, 09:50 AM
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[QUOTE=HOHN;1235056]P-pump is king of quantity, though VP generally offer more power for a given quantity of fuel (better efficiency).


I would agree and disagree with that statement. It should be a ton more efficent due to variable timing, however the milage kings are still the 12v's.

Also it seems like most of the hot 12v's that make big power never clear up the smoke while 24v's at the same power level do. I think this is in part due to the rack travel they run(duration) all the 3rd gens ive seen running alot of duration smoked alot as well. If you had a pump that would move alot of fuel in a short amount of time (short rack) youd get less smoke probably. but to get alot of fuel from a 215 you need alot of rack travel which translates into duration.

jmo
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