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Hot rodded 7cz without the hot

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by bigguns, Jan 24, 2018.

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  1. Jan 24, 2018 #1
    bigguns

    bigguns Road Train Member

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    A young fellow I know rebuilt his 7cz with: kit p/n 1OR9344, BW turbo p/n S478, injectors p/n 1OR8501, cam p/n 130-9710, and a Steed Speed one piece manifold. He has tried several different files but the pyrometer will not go above 700 degrees. What are all your suggestions?

    Second situation: the ecm will not tell the fan to come on. The 40 pin harness now goes into a 70 pin ecm. Cat and a reputable Pete dealer have not fixed this issue in 4 attempts. Your thoughts.

    All the previous work done by the people he works with have produced excellent results. This rebuild has them stumped.
     
    bigguns, Jan 24, 2018
    bigguns, Jan 24, 2018
    #1
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  3. Jan 24, 2018 #2
    spsauerland

    spsauerland Road Train Member

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    What is his boost pressures? Curious of whole turbo P/N. All parts numbers for Cat are correct for a 7CZ 600HP and that is 800 HP cam. 10R8502 would flow 20% more fuel. As far as fan, most all newer Cat flash files kick fan on for coolant temp @ 217 deg.
     
    spsauerland, Jan 24, 2018
    spsauerland, Jan 24, 2018
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  4. Jan 24, 2018 #3
    bigguns

    bigguns Road Train Member

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    I will get more info.
     
    Last edited: Jan 24, 2018
    Reason for edit: Senior moment again. First post was an incomplete sentence.
    bigguns, Jan 24, 2018
    bigguns, Jan 24, 2018
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  5. Jan 25, 2018 #4
    bigguns

    bigguns Road Train Member

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    40# of boost. turbo p/n is 1496880000 from area diesel
     
    bigguns, Jan 25, 2018
    bigguns, Jan 25, 2018
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  7. Jan 25, 2018 #5
    snowman_w900

    snowman_w900 Road Train Member

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    Have you guys tried a different ECM just to test?
     
    snowman_w900, Jan 25, 2018
    snowman_w900, Jan 25, 2018
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  8. Jan 25, 2018 #6
    spsauerland

    spsauerland Road Train Member

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    Plenty of boost, but wonder what backpressure is. That turbo has a smaller turbine housing A/R (1.32) than a stock C-16 (1.65) C-16 can drive more turbo than a C-15 due to the fact it has another 1.2 L of displacement. I am not a turbo expert at all, so best is to talk with a rep from BW to see if this is correct for the application. Has it been strapped to a dyno to see actual HP and torque?
     
    spsauerland, Jan 25, 2018
    spsauerland, Jan 25, 2018
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  9. Jan 25, 2018 #7
    snowman_w900

    snowman_w900 Road Train Member

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    That was my next question. Has it been hooked to a good Dyno
     
    snowman_w900, Jan 25, 2018
    snowman_w900, Jan 25, 2018
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  10. Jan 25, 2018 #8
    bigguns

    bigguns Road Train Member

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    Not hooked to a dyno. This combination is pretty much the same as done on other engines with good luck.I am surprised that they used a smaller than stock turbo. I doubt they have swapped ecms. He told me they were having issues and asked if I had anyone who's brain I could pick for ideas. If I recall correctly his friend has 58 injectors and pulls with the truck. I will double check that. I was hoping @superhauler would show up.
     
    bigguns, Jan 25, 2018
    bigguns, Jan 25, 2018
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  11. Jan 25, 2018 #9
    Superhauler

    Superhauler TEACHER OF MEN

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    Let me get this straight. They wired it up with a 40 pin harness to a 70 pin ecm??
     
    Superhauler, Jan 25, 2018
    Superhauler, Jan 25, 2018
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  12. Jan 25, 2018 #10
    maggard359

    maggard359 Medium Load Member

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    I running the c16 turbo with 1.32 exhaust on a C15 and 900 degrees is max it will go. I run 0958's so it don't surprise me that one only runs 700. That turbo moves so much air it will perform good in a c15 but if you have a true c16 I think your injectors are under qualified for the rest of the engine as it's built, that's just my opinion not fact. The fan will probably be in the wiring I am kinda lost on what they did with a 40 pin harness.
     
    maggard359, Jan 25, 2018
    maggard359, Jan 25, 2018
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