On either end of the 400-480kPa range, the IFR flattens out... this means either of these:
- non-boosted application,
- FPR has help during boost (i.e. manifold-referenced during boost, and non-referenced during non-boost).
The range below 400kPa is boost.
hwo do I find the data values below 400 KPA for the Delta Map?
You can calculate them:
IFR = R0 * sqrt(DeltaMAP / P0)
where:
R0 = flowrate when DeltaMAP is 400kPa = 5.2600 g/s (from your post)
P0 = DeltaMAP when MAP is BARO = 400kPa
i.e. IFR = 5.2600 * sqrt(DeltaMAP/400) where you set DeltaMAP to values ranging from 300kPa to 400kPa (for 1-bar boost).
Note that DeltaMAP = gauge rail pressure when MAP=BARO (i.e. MANVAC=zero).
Ok, however still a couple points of confusion...
In the file that I got for my delta map that I already posted. I was told that came from an LS2 bin. (fine because that's what I need)
However it doesn't match up at all with the spreadsheet. I don't think that spreadsheet can help me. I'd rather just manually calculate what I need on my own, can you give me the formulas with an example to set my IFB?
I understand the formula you just gave me to find out what they are when I start going into boost. Is it safe to assume my rail pressure (assuming my pump can keep up) will stay the same at 4 bar? If that is the case I believe the formula you've give me above will work.
The problem with the file I posted, is that if that's from an LS2 the LS2 has a a FPR at the manifold right? I'm getting confused here as to what will specifically work for my application, sorry.
I'd like to email the files that I have to you if I could.
Sorry, I missed post #15.
Trucks usually have the FPR at the manifold/rail... in this case DeltaMAP stays constant at 400kPa (the difference between rail pressure and MAP).
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