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  1. #1
    Bobtail Member
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    Fire Engine C15 acert bxs problem!!!!

    Yea I have a c15 acert bxs twin turbo cat can anyone tell me where my manifold pressure should be at I know the max I ever see it at is 23 new to cats but this thing sure is gutless compared to my n14!!


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    Quote Originally Posted by N14 cummins power View Post
    Yea I have a c15 acert bxs twin turbo cat can anyone tell me where my manifold pressure should be at I know the max I ever see it at is 23 new to cats but this thing sure is gutless compared to my n14!!
    Not right, our BXS 550's make 55lbs, I would say you have an issue

  3. #3
    Road Train Member stranger's Avatar
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    I've never seen a stock BXS 475 go over 30 psi, and that was pushing it hard uphill.

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    i got 2 in my fleet, both heavy haul 550 programs, turn 50-55lbs with good fuel pressure and no cac leaks. outperform our mxs 550's (makin 50lbs also)

  5. #5
    Road Train Member stranger's Avatar
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    Never drove a 550. Last company I worked for had 10 BXS 475s. I drove almost all of them, and never saw over 30. The 10 MXS 475s were the same way. These were all rather weak. I suspect a 550 would have been much better with more boost.

  6. #6
    Bobtail Member
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    Thanks for all the help guys I think I am going to get Pitt power or pdi and put on here not sure which one yet maybe that will wake it up a little because this things decently needs some help!! Or converting it over to single turbo just not sure I want to be out that much money!!

  7. #7
    Heavy Load Member paul 1052's Avatar
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    You should definitely see more than 23 lbs of boost.

    Have you had the cac tested? I'd start there you're giving up a lot already.

  8. #8
    Road Train Member pullingtrucker's Avatar
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    Quote Originally Posted by N14 cummins power View Post
    Thanks for all the help guys I think I am going to get Pitt power or pdi and put on here not sure which one yet maybe that will wake it up a little because this things decently needs some help!! Or converting it over to single turbo just not sure I want to be out that much money!!
    I would not throw aftermarket high performance parts at this motor until you solve the boost issue. To many guys have motor issues and start throwning money in parts...the engine will run a little better, but will never run to its full potential until you solve the underlying issue. Start with the basics.

    Boost leaks at the CAC, hoses, clamps, aluminum intake elbow going into the head, and even between the turbos and pre cooler. You would be surprised when boost leaks develope and the lack of testing procedures from CAT.

    Also check your fuel pressure. The fuel pressure is even more important on a ACERT than any other engine for some reason. Even though the older MBN, 6NZ and ACERT all run the same fuel system, the ACERT responds more to fuel pressure issues. Do a search on this site and you will find all the info you need on your engine.

    I also highly suggest you stay away from the Pittsburgh Power Box if that is one of the mods you are thinking about. Again, do a search and you will see why.

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  10. #9
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    23 psi of boost is very low for this engine. Id be looking at the turbos to see if they're damaged from a sleeve or other turbo failure also. You may also have a precooler coolant leak that has allowed the coolant to build up in the precooler and not allowing boost to get through it to the engine. The air temperature coming off the turbos will cook any coolant leaking into the air side of the precooler to cause it to build a scale across the heat exchanger coil this stops air flow into the engine

  11. #10
    Bobtail Member
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    Thanks guys appreciate all the help hope to get this problem fixed soon!!
    Last edited by N14 cummins power; 12.02.2011 at 02.28 PM.

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