12.7 detroit horsepower - TheDieselGarage.com
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post #1 of 123 (permalink) Old 10-04-2009, 03:57 PM Thread Starter
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12.7 detroit horsepower

hey guys im new on here and have been reading about all the things you can do to gain horse power but i cant find any answers to fixing series 60 detroits.i just want to know if their is ecm codes,resistors ,cailabration codes,little things u can do to change stuff without spending thousands of dollars to get some juice out of a detroit.it is a ddec 4 2001 peterbilt.it isturned to 500 hp 1650trq and it is the BK series engine.i have hers of changeing calibration codes to .75 the guys at detroit in henderson ky say it will give u about 20 hp but others say it does nothing.i have also herd of putting a map sensor from a gm car but cant get no answer on which one to use or if it actually works.someone please help if they can we pull dump bucket and im usually 83000lbs or more and i hate detroits power thanks heath
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post #2 of 123 (permalink) Old 10-04-2009, 05:35 PM
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Hello Heath: Havent got any Detroit info for you but welcome to the forum...
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post #3 of 123 (permalink) Old 10-04-2009, 08:29 PM
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Originally Posted by black_dog106 View Post
Hello Heath: Havent got any Detroit info for you but welcome to the forum...
http://www.pdidiesel.com/productinventory.html[/I]
I know some guys are happy with thier CAT stuff. They do the same for detroits. There is also pittsburgh power.

To friggin lazy retype my sig again. Damn hackers.
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post #4 of 123 (permalink) Old 10-04-2009, 11:25 PM
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Cal codes are more for smooth idle and economy than power from what I recall and the number I remember is 0.67.

Set the overhead, keep good filters in the fuel system and you are WAY ahead of the average 500HP mill. If you have a "DAVCO" (IMO the only good diesel fuel filter), change it ONLY when the fuel is sitting within 2" of the top and no sooner.

Make SURE the fuel heater, if equipped, is OFF in the warm weather (above 20*F), hot fuel kills your power by lowering the fuel density (fewer BTUs per gallon due to expansion).

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I Support: Trailer brakes an every axle over the towing vehicle's GVW; CDLs for RVers; Safety inspections for ALL vehicles and 6 axle trucks (97K GVW proposal).

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post #5 of 123 (permalink) Old 10-08-2009, 07:08 PM Thread Starter
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does any one know if the pitsburgh power really works we are tierd of this gutless motor
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post #6 of 123 (permalink) Old 10-08-2009, 07:46 PM
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How about a motor swap ?

Replace that tired Dogtroit with a fine Cummins or Cat unit . . .


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post #7 of 123 (permalink) Old 10-08-2009, 10:01 PM
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The Pitts Power box does work and so does the Bully Dog Downloader. Neither is cheap, but when a person goes looking for horsepower they should understand its gonna take money. Before you look into either one, I would start with the basics...just like building a hot rod. Get the fuel and air in and exhuast out. Address fuel flow and pressure with a Davco or FASS system and high quality filters (you don't want to destroy a motor with crap in the fuel). Then look at a high flow exhuast consisting of a high flow muffler and a ported exhuast manifold. Also look at your harmonic damper and install a new one if the miles are up there or it looks bad...add a balancer while your at it. High quality oils and a good bypass filter will help insure your driving pleasure once the motor is producing HP/TQ. Along with all this you can wrap the exhuast pipe coming off the turbo and put a turbo blanket on to help keep the spent gases flowing. Like I said earlier do the simple and inexpensive things first and build on those gains until you are ready of bigger power...just adding a box or tuned ECM will more than likely result in less than expected gains if the other areas of the engine aren't upgraded also.

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post #8 of 123 (permalink) Old 10-09-2009, 12:24 AM Thread Starter
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thanks for the info we have had it in the shop several times and we have eliminated air in fuel computer programing new turbo charged air cooler boost sensor injectors and other basics we just came back from oaklahoma last nite and we had 77000 lbs comeing up I44 would hit the hills at 75+at the bottom and be 35-40 at the top giveing it all it had.but detroit and a locall shop here in town say it is doing all it can.its 500hp and my boost pressure comes rite up to 31lbs with no hesitation good fuel pressure and less than 3lbs on restriction I personally think tha 3;55 rears and a overdrive tranny is just a little high final drive ratio for a low torque detroit what are ur guys opinions would like to hear from some people about this thanks
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post #9 of 123 (permalink) Old 10-09-2009, 12:54 AM
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I sir am a big fan of running lower gears ! what you spinning for tires ? 11R22.5's ? you could drop as low as 5.29's and still run 75-77mph. . .

you got 3.55's now ? I would try some 4.10's or 4.33's for sure. . .

I have a .70:1 15th gear in my Mack with 6.38 gears it dose 65mph@2,000rpm


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post #10 of 123 (permalink) Old 10-09-2009, 01:29 AM Thread Starter
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i think mine is .74 overdrive and lopro 24.5 63 at 1350 rpm
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