Injector Flow Numbers - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 15 (permalink) Old 08-12-2007, 06:03 PM Thread Starter
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Injector Flow Numbers

Here's the numbers I have for the various HEUI sticks.

They don't correlate with what I've read on the net over the years. So I'm wondering how the numbers, posted all the time, have been derived. what test conditions were they done at?
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post #2 of 15 (permalink) Old 08-12-2007, 06:23 PM
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Re: Injector Flow Numbers

They usually measure with 1000 hits, and probably more then 1.5 ms of pw.
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post #3 of 15 (permalink) Old 08-12-2007, 06:43 PM Thread Starter
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Re: Injector Flow Numbers

I know they use 1000 strokes, that's how they get cc's. There's 1000 cubic mm's in one cc. I use this daily when I have an injection pump on the test stand at work.

So if a BD stick flows 151-169 cubic mm/stroke according to the chart, that's 151-169 cc's per 1000 strokes. So to get 250 cc's out of the they are running more than 2.5 ms PW??? I see that unlikely. Does 500 more psi of ICP make that big of a difference?
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post #4 of 15 (permalink) Old 08-12-2007, 06:44 PM
 
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Re: Injector Flow Numbers

I have seen 6ms of PW
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post #5 of 15 (permalink) Old 08-12-2007, 06:49 PM
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Re: Injector Flow Numbers

Its probly right on. Think for a second, AA's come in 94-most 96/97's.

They are advertised at 73mm^3 on the VC from IH. I have scanned many of these trucks and seen 3000psi oil on them stock, with PW just under 2 ms.

So if that were cut to 2500psi and 1.5 ms PW, that about equals out.

I would bet money this list is for IH applications more so than ford. Because SD's have more than 1.7-1.9ms PW.
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post #6 of 15 (permalink) Old 08-13-2007, 05:03 PM
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Re: Injector Flow Numbers

My injectors (BD's) flow 248cc/1000 at 4ms 2700ish ICP. Wich means that they actually empty in something under 4ms.

If I were to run say 3ms, they would probably flow something in the 200cc range. Run say, 1800psi at 2ms....probably 180ish.

The flow is what it is. If somebody wants to set a standard, then I suggested 4ms, 2800psi and 1000 shots. That is a good average for WOT.

When I want to test to see them for cruising, I run 1100 or 1200 or so and about 2ms. About what you would expect when actually cruising.

Those numbers looked to be pretty normal from what I could read ( I couldn't enlarge it).

I pushed 325cc's/1000 through a bone stock 7 hole powerstroke nozzle at one time in around 6ms. But the pressures were so high that the consistency at full pressure was not good between injectors, and the injectors themselves did not last long. That same set did around 180 or so cc's/1000 at 4ms and high ICP. They made 428rwhp on that 180ish cc's of fuel as well.

Injector flow can be a crazy thing. Some of the effects that pressure and tme can have are FAR from intuitive.
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post #7 of 15 (permalink) Old 08-13-2007, 06:05 PM
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Re: Injector Flow Numbers

Quote:
Originally Posted by Charles View Post
My injectors (BD's) flow 248cc/1000 at 4ms 2700ish ICP. Wich means that they actually empty in something under 4ms.

If I were to run say 3ms, they would probably flow something in the 200cc range. Run say, 1800psi at 2ms....probably 180ish.

The flow is what it is. If somebody wants to set a standard, then I suggested 4ms, 2800psi and 1000 shots. That is a good average for WOT.

When I want to test to see them for cruising, I run 1100 or 1200 or so and about 2ms. About what you would expect when actually cruising.

Those numbers looked to be pretty normal from what I could read ( I couldn't enlarge it).

I pushed 325cc's/1000 through a bone stock 7 hole powerstroke nozzle at one time in around 6ms. But the pressures were so high that the consistency at full pressure was not good between injectors, and the injectors themselves did not last long. That same set did around 180 or so cc's/1000 at 4ms and high ICP. They made 428rwhp on that 180ish cc's of fuel as well.

Injector flow can be a crazy thing. Some of the effects that pressure and tme can have are FAR from intuitive.
This is why Dynomite Diesel do not describe the flow through their EH'ed injectors in cc's. The mm^3/1000 injection events can vary all over the map depending on pressure, pulse width etc.
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post #8 of 15 (permalink) Old 08-13-2007, 09:01 PM
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Re: Injector Flow Numbers

At least a cc's/1000 at blank pressure and blank pw tells you something

A flow number in cc's per time or lbs per time tells you Nothing at all. Unit injectors need to be measured per injection event. You can measure a nozzle in flow rate, a unit injector must be measured per event. A dodge, or chevy "injector" is nothing but a nozzle. In that case, lbs/min or cc's per min or something similar is 100% the way to do it.

When the injector has a fixed volume flow and is it's own injection pump.....you simply cannot do that and expect it to mean a thing.

Not to mention, when they do their flow testing, they are still assuming some value for ICP.

Two Cents.
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post #9 of 15 (permalink) Old 08-13-2007, 10:04 PM
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Re: Injector Flow Numbers

Quote:
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At least a cc's/1000 at blank pressure and blank pw tells you something

A flow number in cc's per time or lbs per time tells you Nothing at all. Unit injectors need to be measured per injection event. You can measure a nozzle in flow rate, a unit injector must be measured per event. A dodge, or chevy "injector" is nothing but a nozzle. In that case, lbs/min or cc's per min or something similar is 100% the way to do it.

When the injector has a fixed volume flow and is it's own injection pump.....you simply cannot do that and expect it to mean a thing.

Not to mention, when they do their flow testing, they are still assuming some value for ICP.

Two Cents.
That was my point so depending on ICP, pw etc. a vendor could advertise an injector as flowing x ccs and another vendor could advertise the same injector as 1.5x ccs.
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post #10 of 15 (permalink) Old 08-13-2007, 11:19 PM
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Re: Injector Flow Numbers

Instead most dealers advertise what the maximum stroke is of the IP in realation to the size of fuel area. 28.27mm^3 for A code plungers and 39.59mm^3 fr B codes.

That would be the maximum available for injection if the injector had suffencent ICP and PW.
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