Turning Up A 6.9 And 7.3 Mechanical Motor
#31
08-18-2009, 06:55 AM
Hi
Will this principal work on my bakkie.Its a 2.5l isuzu.It also has his access window on the side of the pump.I have moded all the basics but the mechanical diesel pump still remains because i dont know how and cant find any one that knows how.
Will this principal work on my bakkie.Its a 2.5l isuzu.It also has his access window on the side of the pump.I have moded all the basics but the mechanical diesel pump still remains because i dont know how and cant find any one that knows how.
#32
09-03-2009, 02:23 AM
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Location: Elk City OK
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I was always told that if a Diesel smokes it is not burning all the fuel, in other words it's wasting fuel, blowing it right out the exhaust. My truck rarely smokes and has plenty of power.
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My truck has a 6.9 with a second generation Banks Sidewinder Turbocharger on it and I replaced the 4-spd with a 5-spd. transmission.
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My truck has a 6.9 with a second generation Banks Sidewinder Turbocharger on it and I replaced the 4-spd with a 5-spd. transmission.
Last edited by Superdog1; 09-03-2009 at 02:23 AM. Reason: Automerged Doublepost
#33
09-03-2009, 09:51 AM
Diesel Wrench
Thats true, these guys you see blacking out roadways are wasting a ton of fuel. Thats not to say there isn't any benefit to turning the pump up. I turned my pump up 2 flats and my truck doesn't smoke under normal driving but will smoke a little if I push it. It has a little more power and hasn't affected my MPG at all. 
#34
12-21-2009, 03:43 PM
I turned mine up 2 flats an noticed nothing.. so i went a 1/4 turn and very little difference..
by the time I was done turning little by little by little and seeing nothing I got mad and just cranked the screw all the way in then backed it out a half turn
would smoke real heavy under a load (or WOT) otherwise it ran clear, with much more power, and no ill effects, this motor has 209k on the clock and ran like this for a year until someone hit me and flipped it, sold the remains and it's still running powering the frame with a backhoe attached to it.
get an EGT gauge if your worried, but i've seen numerous 6.9's running like this for years without burning up.
by the time I was done turning little by little by little and seeing nothing I got mad and just cranked the screw all the way in then backed it out a half turn
would smoke real heavy under a load (or WOT) otherwise it ran clear, with much more power, and no ill effects, this motor has 209k on the clock and ran like this for a year until someone hit me and flipped it, sold the remains and it's still running powering the frame with a backhoe attached to it.
get an EGT gauge if your worried, but i've seen numerous 6.9's running like this for years without burning up.
#35
01-20-2010, 01:40 PM
can i mechanically turn up my 1997 powerstroke????
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can i do this to my 1997 powerstroke?
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can i do this to my 1997 powerstroke?
Last edited by JD97Powerstroke; 01-20-2010 at 01:40 PM. Reason: Automerged Doublepost
#38
02-17-2010, 05:52 PM
Diesel Fan
I turned mine up 1/4 turn and had a nice amount of smoke and still got 20 mpg...just recently turned it up to 3/4 of a turn...16 mpg and a hell of a lot of black smoke...people hate getting behind me now...
#39
02-18-2010, 02:27 PM
the idi engines both interchange, and on the outside they are identical. so as long as the 94 is not a di powerstroke do it. some people actually prefer the 6.9 because the cylinder walls are thicker. but this only matters to engines that have suffered severe cavitation. 7.3's are more prone to cavitation problems because there cylinder walls are thinner. i hope everyone is using coolant SCA's to prevent this.
#40
02-18-2010, 02:40 PM
Diesel Wrench
Additives put in the coolant to prevent block cavitation. Not as big a deal with the 6.9 since it has thicker cylinder walls but still needs to be addressed, more so with the 7.3. This article will explain cavitation and what the SCA's do.
Cavitation Article
Cavitation Article
