ARbowhunter7
Opulence...I Has It.
- Joined
- Sep 8, 2007
- Messages
- 1,370
Yeah but that dosnt mean squat if you say "hey my VE makes 370cc's" and then try to treat that as you would if you were building a 700HP P-pump truck, Jason is mearly saying with a VE it is more critical to aim to burn that fuel at the RPM designated peak CC's
the all fuel numbers are hard because like Jason said, packing 700HP worth of cool air into a cylinder at 3000rpm is not an easy thing to do. i agree, nitros may have a advamntage over even the best turbo setup.
KTA's dual feed VE setup is what we should be talking about, what if feeding 400PSI directly to the plunger through the shutoff solinoid is the answer? its not that a 14mm pump cant phisically push enough fuel through the DV's to fuel upwards of 3000prm, its more like the plunger is starved because of the limitations of the vane pump supply pressure
We were talking about the flow rating of the pump. I realize the mechanics and limitations of the VE in the upper RPM range. That is not what is in question...period.
We were talking about flow ratings. The official flow rating is based on the pumps PEAK output, regardless of the RPM range. Those are the numbers by which the pump is referenced. There are certainly other factors and variables that go into the actual power-making process (which I believe you are referencing) but those were not in question. This side discussion is nothing more than the flow rating of the pump in question, measured in peak output in CC's.
For example if I dyno my truck and it makes 200hp/400tq @ all rpms, but spikes to 600hp/ 1200tq from 4000rpm-4100rpm, then my dyno sheet will read 600hp/1200tq, regardless of the percentage of the powerband that was spent at said peak output level.
Same goes for a flow bench. If a pump makes 200cc @ all rpms, but makes 400cc from 4000rpms-4100rpms, then the pump is rated at 400cc, despite the fact that it may not have pushed 400cc for a significant portion of the power range.
Of course, the entire powerband output needs to be examined when looking at a flow graph, and the output at all rpms is important, but it has no bearing on the pumps flow rating. The flow rating is the only thing I was referring to.
The question arose of the peak output of a 14mm VE, and I answered over 500cc. This IS the correct answer, but I referenced the wrong truck (my apologies to Jason and whoever corrected me). Scheid does make a 14/4 that flows 500+ cc. Since Jason just set a VE record using a Scheid pump, I assumed that he would have been using Scheids highest output pump. This was not the case. I remember now JQ mentioning that his goal was pushing the limits of VE performance, but also to see how reliable a 14mm pump could be. This is the reason for the exclusion of the 4mm camplate. Also, the rpms were kept out of the stratosphere with pump life in mind, IIRC, which is probably the reason for the 375 flow rating, and probably the rpm point that Jason was made in the previous post, having reread it.
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