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  1. #31
    Trucker Forum STAFF Brickman's Avatar
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    Quote Originally Posted by Kinghunter View Post
    Brickman I thought you were running cars. Now this tanker at 4.8. I am leaning towards a new Detroit. Those folks seem to know what they are doing unlike those other people at cummins and cat when it comes to fuel econ.

    Kinghunter



    Been doing cars since Sept 1.

    Pulled a crude tanker for 2 months prior to that. I hated it, but it was a job.

  2. #32
    Medium Load Member 24valve puller's Avatar
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    Quote Originally Posted by FLYBYU44 View Post
    I like Detroits myself. We have ISX's and ISM's in our trucks. The fellow who order the new trucks with the ISM's was promptly fired after we got the first few. We get around 3mpg, on of our 60 Series trucks I got 6.5mpg with (Kenworth T-800's) The ISM's also are complete dogs, just don't have the power to pull hills at all. Personally I think just about anything is better then the new Cummins Engines.

    Detroits are the main reason there is more than one lane on the highway, so the rest of can pass. I would put my N-14 up against anything on the road for fuel mileage

  3. #33
    Bobtail Member
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    Red face cat vs isx

    I am currently running a 2004 c15 cat bridge motor and i have an oppertunity to trade it for a 2006 peterbilt with a 565 isx in it does any one have any info on fuel milage with these motors i am currently pulling super b trains in b.c canada with a weight of 62000 kg the bridge motor pulls alright could be better but i am burning 60 liters of fuel more than the other trucks i haul with 2003 c15 cat i am really leaning towards the 2006 pete with the isx any info would be great

  4. #34
    Bobtail Member
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    Quote Originally Posted by spiderballs33 View Post
    I am currently running a 2004 c15 cat bridge motor and i have an oppertunity to trade it for a 2006 peterbilt with a 565 isx in it does any one have any info on fuel milage with these motors i am currently pulling super b trains in b.c canada with a weight of 62000 kg the bridge motor pulls alright could be better but i am burning 60 liters of fuel more than the other trucks i haul with 2003 c15 cat i am really leaning towards the 2006 pete with the isx any info would be great
    Just make sure its geared right. If its geared to run on logging roads you may not get the best fuel economy on the hwy without changing gears. Get the parameters set-up for you with Powerspec, its a free dowload from powerspec.cummins.com. You have to buy an inline adaptor or have your dealer do it for you. Take a thumb drive with you and have them create a template for you to save on the thumb drive. Good luck and set some money aside for an EGR valve or EGR pressure tubes every 150k to 200K miles. You can clean the tubes yourself every 100K miles as maintenance if you want but at least put the insulated models on their not already on there. Oh yeah, test the radiator cap, it needs to hold 14psi. If it doesn't you'll be buying an egr cooler too.

  5. #35
    Bobtail Member
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    the ism was not a truck engine ..meant for school buses ,but was strong enough for vocational trucking .the isx will eat a kitty of same power with less fuel use

  6. #36
    Road Train Member Jfaulk99's Avatar
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    Quote Originally Posted by CMoore View Post
    Ok I've read all the horror stories about the high cost and limited availability of Cat parts. But what is the difference in the upfront purchase costs?

    Two trucks spec'ed the same, one's got a an ISX the other a Cat, same hp etc etc? How much more is the CAT?

    Is it worth it? Or are you just paying for a name?
    Last one I ordered ('06) the ISX was $5k less than the Cat.......Yes I still went with Cat and have ZERO regrets and still would given the chance.

  7. #37
    Trucker Forum STAFF Brickman's Avatar
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    Quote Originally Posted by dogface View Post
    the isx will eat a kitty of same power






    Only in the minds of the CAT haters.

  8. #38
    Road Train Member Jfaulk99's Avatar
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    Quote Originally Posted by Brickman View Post



    Only in the minds of the CAT haters.
    I've heard of the elusive "Cat Killing Cummins"... But like bigfoot I've never seen it. The Cummins powered trucks we've owned have always ran pretty good but always fell short somewhere.

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  10. #39
    Trucker Forum STAFF Brickman's Avatar
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    Like I said many times before.


    The truck in my profile pics that I wrecked had a 525 Cummins in it. Fresh overhaul. (less than 200,000 miles on it)

    The replacement truck had a 500 CAT with over 800,000 miles on it. Trans, rear ends, tires etc specs were all the same.
    Same brand, same model, one was a 99 other was 00.

    The CAT would get up and leave the cummins powered truck far behind pulling the same load.

  11. #40
    Road Train Member rollin coal's Avatar
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    Quote Originally Posted by Brickman View Post
    Like I said many times before.


    The truck in my profile pics that I wrecked had a 525 Cummins in it. Fresh overhaul. (less than 200,000 miles on it)

    The replacement truck had a 500 CAT with over 800,000 miles on it. Trans, rear ends, tires etc specs were all the same.
    Same brand, same model, one was a 99 other was 00.

    The CAT would get up and leave the cummins powered truck far behind pulling the same load.
    I've driven both and have to agree. My 475hp bridge motor (universally condemned as the worst Cat engine ever) even when it was all stock still had better power than any ISX I ever had. Hell it would outpull lots of loaded trucks out there with a bad turbo on it that looked like it had been blowtorched on the inside. No it doesn't pull down to 1200 rpms like a Cummins, anything below 1400 is lugging and I'm splitting a gears, but who cares how low you can lug if the motor doesnt pull as well?

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