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  1. #31
    Light Load Member Tom Joad's Avatar
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    Quote Originally Posted by ironeagle2006 View Post
    Jonbass that engine I drove had a MAX of 600PSI at the Rail on that dyno run when we broke a DYNO RATED FOR 700 HP WHEN IT HIT 720 I WAS ONLY AT 450PSI RAIL AND 40 LBS TURBO OUT OF 60 I COULD FEED HER. She also had CERMET Pistons retro fitted Highflow cooling system instead of the crap low flow was equipped with a CAC retrofit we thank Kitty Cat for the Intake on that one. You know a 3406B model intake will mate up with a BIG CAMIV block. If I had really wanted to get extreme I also had water injection to cool off the exhaust if needed. However the Turbo was only at 1000 and would hold til 1200 safe.

    Even pulling Snowshoe in PA she never got hotter than 900 normally Pyro temp. However there was one time she did melt down right before the overhaul. My mother had a Heart attack I found out and my boss told me even if I blew it up scream it in. Wrong thing to tell me that day. IL escorted me in from the KY line I was on I-24 at the time and I came in screaming by the time I got her back to the yard 2 pistons had holes in them one was cracked and #5 had swalled a valve. Why because I melted the turbo into a pile of SLAG.

    Wouldn't it have been cheaper to park the truck, rent a car, and send another driver out to bring the truck home?


  2. #32
    Road Train Member ironeagle2006's Avatar
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    At the time MOMMA WAS CRITICAL Even my dads company over the QC pulled his Governor controls to get him back after relaying his load. They bounced him in 700 miles to get him home. My brother in the USAF and his wife and kid were told GET HOME Emergancy leave. At the time the company I drove for had all of 20 trucks small outfit and that weekend we were all busy most of us were all heading out 4 of us were coming IN to the yard. I was the closest to the Yard and I still did not make it home til 6 PM that night and my dad did not get home til 3 am SUNDAY morning. My Oldest Brother made it in at 8 am Sunday I ran to the next town got my older brother by 8 Saturday night and by 10 AM Sunday we were all in Springfield IL at the Hospital were they had transferred my mother. She was there til Weds of that week.

    Also when they tore the truck down they found the issue. See it had not been OVerhauled YET to become a beast we had hopped her up slightly aka maybe to 540 or so using the pump. Well the foremen found that the Radiatior had lost part of the flow restrictor and it had lodged in the cooling passage of the #1 head also when they examined the Turbo the Factory Original one with 1.1 MILLION on it well they found a crack in the bearing that blocked OIL FEED and that caused the melt down.

    Then the boss went thru the maintance records and my writeups. Saw I had written it up for running hot and also Turbo boost low for 4 weeks PRIOR to the meltdown. I was cleared in the incident the foreman however was looking for a new job. When he called me up and said well you melted her down and I am going to rebuild her for you were do you want the parts to come from I told him DI of Pittsburgh. He goes how much power do you want I said about 700 would be nice he gave me we think at max 850.

    BTW that truck is STILL running hauls grain for a farmer and he LOVES HER in fact he calls her the best money he spent can get 2 extra rounds a day out of that truck compared to a 350.

  3. #33
    "Pine Tree Eater" 1989 Pete's Avatar
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    Quote Originally Posted by jonbass40 View Post
    No offense but the guys at pittsburgh power dont have much of a clue as to how to build a hot big cam motor. They dont get enough fuel pressure to the them. in order for a big cam to run hard u need at least 240lbs of fuel pressure. PP struggles to get 220lbs at 2200 rpm. so what u end up with is a motor that only runs good at 19 to 2200 and doesnt have any power and gets hot easy. There is only one guy I know that can build a good pump for these engines, Tom Roberts, but unfortunatly he wont build any anymore. pp opens the throttle shaft in the pump up to much and u loose all the pressure that way. Just dont run good with one of their pumps. Plus his pistons are to low of a compression ratio. He may promise 700hp but your never gonna make it.
    How would you get this motor to preform

  4. #34
    Bobtail Member
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    manual power

    Quote Originally Posted by 550hpW900L View Post
    Just get a yellow one and call it a day, i have yet to come across a "come-apart" that i havent blown it doors off. Then again my "five fifty kitty" is more of a "not so stock kitty"
    Hey i am new here and glad to be here. I do admit the c15 cats ARE top of the line on power with just a hook up on a lap top or a programer, i have drove a fld with a 550 and 358 gears and a 13 over pulled like a beast. A cat will out pull about anything out they with just a little modification. But i have also worked on trucks for a long time before i ever drove one my dad was a truck driver and mechanic for cat for 10 years. cat engines are among the most costly to over haul, the fld i drove went down at less than a half a million miles, it was pumping antifreeze out the blowby tube, and had a cracked head, put over 9 grand in a inframe. alot of truck drivers do not know the joy of driving a truck with a manual engine, one that does not have a ecm. Now my truck is a 1980 w9 that has a big cam 350 cummins that has proved it self to not only me but the previous owner, i have had over 35 tons on a log trailer, the truck runs great, i can pull jellico mt about 50 mph grossing 92 thosand pounds in 8th over, it has a 13 over and 4.11 ratio. Now i can do a inframe on this engine for less than a grand in parts. The best part of drivin a old manual motor is when u hit the hammer the black smoke roll from the stacks and the cheack engine light doesn't come on and worry u to death, now don't get me wrong i love to drive cats and have enjoyed a few 2 stroke dd to, they are all good engine but for me i will stick with what i have it is paid for and i know about ever ince of a 855 big cam.
    Last edited by faseddie; 03.07.2010 at 08.35 PM.

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  6. #35
    Light Load Member
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    Quote Originally Posted by jonbass40 View Post
    No offense but the guys at pittsburgh power dont have much of a clue as to how to build a hot big cam motor. They dont get enough fuel pressure to the them. in order for a big cam to run hard u need at least 240lbs of fuel pressure. PP struggles to get 220lbs at 2200 rpm. so what u end up with is a motor that only runs good at 19 to 2200 and doesnt have any power and gets hot easy. There is only one guy I know that can build a good pump for these engines, Tom Roberts, but unfortunatly he wont build any anymore. pp opens the throttle shaft in the pump up to much and u loose all the pressure that way. Just dont run good with one of their pumps. Plus his pistons are to low of a compression ratio. He may promise 700hp but your never gonna make it.
    None taken! But i think you may of had some other issues with fuel psi, they did my stc bc4 made 500 psi turned 3000 rpm, not sure what your talking about 220 psi Why won't Tom build any more pumps? I agree PP is not the best on electronics, but mech wasn't bad. Just my .02.

  7. #36
    Medium Load Member Brickhauler's Avatar
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    Quote Originally Posted by jonbass40 View Post
    No offense but the guys at pittsburgh power dont have much of a clue as to how to build a hot big cam motor. They dont get enough fuel pressure to the them. in order for a big cam to run hard u need at least 240lbs of fuel pressure. PP struggles to get 220lbs at 2200 rpm. so what u end up with is a motor that only runs good at 19 to 2200 and doesnt have any power and gets hot easy. There is only one guy I know that can build a good pump for these engines, Tom Roberts, but unfortunatly he wont build any anymore. pp opens the throttle shaft in the pump up to much and u loose all the pressure that way. Just dont run good with one of their pumps. Plus his pistons are to low of a compression ratio. He may promise 700hp but your never gonna make it.
    240 lbs of fuel pressure and you will be replacing the cam before 50,000 miles because the injector lobes will be flat. You need higher flowing injectors and high volume of fuel to make power and have the engine live. Also higher compression, high boost and lots of fuel = broken head bolts and hot pyro on a cummins. Look at the factory specs, the lowest power big cam engines like the formula 290 had the highest compression.
    If your just fooling around, you can dig the little plastic ball out of the end of the throttle shaft and turn the fine adjustment screw for the fuel pressure out all the way. Takes 5 minutes and will bump your fuel pressure up 20-40 lbs depending on where it was initally set.
    4 main things to make a cummins run
    1. More fuel
    2. Big Turbo
    3. lower compression
    4. ###### cam timing

  8. #37
    Medium Load Member Brickhauler's Avatar
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    I was censored on the cam timing, I swear it was not a bad word. What I initally typed was the opposite of advancing the timing in other words ree-tard. Why would that get crossed out? You need to say slow timing I guess? to be politically correct and all

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  10. #38
    Medium Load Member Brickhauler's Avatar
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    Oh yeah btw I knew a guy in Phx AZ back about 94 who had PP build an engine for his International. His name was Bill from Southwestern Fast Freight. His truck would run and as far as I remember it was very reliable.

  11. #39
    Trucker Forum STAFF
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    The word tripped the censor. I would word it 'decrease the injection timing advance'.

    Most engines in other applications that are powered up also have lower compression ratio pistons. This would be agricultural, industrial, construction, or marine engines

  12. #40
    Bobtail Member
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    Quote Originally Posted by 550hpW900L View Post
    Yup Kurt's the man, he even hooked me up with a marine ecm. According to him it should spit out 900whp.... Just waiting on the turbo now.
    Does that not kill your MPGs

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