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Thread: LBZ Fuel Pressure Regulator on LB7

  1. #1
    Junior Member xploitdiesel's Avatar
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    Question LBZ Fuel Pressure Regulator on LB7

    So I've adjusted the stock tune to reflect something close to that of the LBZ table...although I had to make some guesses for some of it... Can someone with a good knowledge of this look over it and let me know what they think? Should this at least idle smooth??? Run somewhat smooth? Is there anything else I should change in the tables for this? It's stock tuning, not my truck, the guy had an LBZ FPR already and wanted to use it...and I had already tuned it to remove the VATS because it was having issues.

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  2. #2
    Junior Member xploitdiesel's Avatar
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    Quote Originally Posted by xploitdiesel View Post
    So I've adjusted the stock tune to reflect something close to that of the LBZ table...although I had to make some guesses for some of it... Can someone with a good knowledge of this look over it and let me know what they think? Should this at least idle smooth??? Run somewhat smooth? Is there anything else I should change in the tables for this? It's stock tuning, not my truck, the guy had an LBZ FPR already and wanted to use it...and I had already tuned it to remove the VATS because it was having issues.

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    Actually I just checked and I was off a bit on the "3000" cell... FIXED
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  3. #3
    Lifetime Member THEFERMANATOR's Avatar
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    I sat down and did a graph overlay of the 2, and the values I came up with were.

    0 1550
    1000 1500
    2000 1460
    3000 1421
    4000 1386
    5000 1376
    6000 1366
    7000 1351
    8000 1342
    9000 1326
    10000 1314
    11000 1271
    12000 1216
    20000 1062
    28000 887
    36000 728
    44000 573
    52000 0
    60000 0
    1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that,
    DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, custom tuning by me, KENNEDY single pump and pump rub kit.

  4. #4
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    LBZ Reg for LB7
    mm3/s mA
    0 1550
    1000 1500
    2000 1460
    3000 1415
    4000 1395
    5000 1380
    6000 1366
    7000 1354
    8000 1340
    9000 1328
    10000 1316
    11000 1305
    12000 1290
    20000 1195
    28000 1110
    36000 1035
    44000 895
    52000 700
    60000 400

    I know this is old, but I did the graphical overlay method and got the above. THEFERMANATOR, I graphed your proposed mA vs mm3/s values and found them to be pretty spot on up through 10000 mm3/s, after that it seemed to skew away considerably from the LBZ table. Was this intentional? ie. am I missing something?

  5. #5
    Lifetime Member THEFERMANATOR's Avatar
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    I did 2 seperate graphs and overlayed them, and those were the numbers I came up with. it's been quite awhile since I did it, so I don't have my graphs anymore.
    1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that,
    DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, custom tuning by me, KENNEDY single pump and pump rub kit.

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