IP turn up question
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IP turn up question
I was told by my friend who was an ex coworker of mine and a better diesel mechanic than I that I shouldn't turn the IP up on my truck without a turbo. He said that it would do no good to turn it up and will only just roll black coal out the tail pipe cause there isn't any extra air coming in. I don't want to turn it up much just a enough to get a little more ommph for towing than stock. The only time it chugs black smoke now is when I take off in second or if I roar it up to 3000 rpm when accelerating in a hurry. Can I turn it up a little bit and get a little more HP? I know I need a pyro gauge which I plan to get and install before I decide to jack the pump up a bit. 
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From: florida
I was told by my friend who was an ex coworker of mine and a better diesel mechanic than I that I shouldn't turn the IP up on my truck without a turbo. He said that it would do no good to turn it up and will only just roll black coal out the tail pipe cause there isn't any extra air coming in. I don't want to turn it up much just a enough to get a little more ommph for towing than stock. The only time it chugs black smoke now is when I take off in second or if I roar it up to 3000 rpm when accelerating in a hurry. Can I turn it up a little bit and get a little more HP? I know I need a pyro gauge which I plan to get and install before I decide to jack the pump up a bit.
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Diesels always run "wide open throttle". They suck in as much air as they can, and then of course the pump adds the fuel to make the fire. Too much fuel for the given amount of air won't give you anything other than worse mileage, really. Add a turbo, you can push more air into the cylinders for any given revolution, hence, a need for more fuel. Pyrometer is a must, speaking of which, I need a new one...because as someone on here told me before, diesel fuel is a much better fuel for our mills than aluminum; melted pistons are bad.
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Is there any way I can get more air to it without having to buy a turbo? Again I am very limited on cash funds since I am barely making it as a delivery driver at Papa john's (not my choice). So naturally I can't afford a turbo and all the extras I'll need right now
Post Fiend
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From: Nutter Fort, WV
If you see a light black haze out of the exhaust, you are right at the point of more fuel than you have air to burn.
So all more fuel is going to do is darken the exhaust, lower MPG's and raise EGT's.
You need more air before you need more fuel.
So all more fuel is going to do is darken the exhaust, lower MPG's and raise EGT's.
You need more air before you need more fuel.
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Cold air intakes help, there's a few that have been done up on here, and they're cheap and easy. Ram air would work well, but you'd see most of the benefits at higher speeds. I'm actually getting ready to build a new cold air intake for my own truck, since I ditched the ATS turbo intake housing and my old "dryer duct" setup won't work anymore.
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Why have I read that some people have turned their IP up a little (I mean very little) without any mods they said that regular milage stayed the same but towing milage improved?
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I would try turning it up just slightly, like 1 flat of the screw (60 degrees rotation) - reason is that it being an ex-fleet vehicle it's probably been detuned slightly so it can hold up better to moronic construction workers who drive like the throttle pedal is an on-off switch 
Even from the factory these trucks could use a tiny bit more fuel, if you have a cold-air intake and better exhaust you can use a bit more again... In any case when you do turn it up and before you get the pyro you need to just watch for the smoke out the tailpipe - whenever it starts chugging steady black smoke you just let off the throttle. You won't cloud up three lanes of traffic if you're smart with the fuel increase amount.
Even from the factory these trucks could use a tiny bit more fuel, if you have a cold-air intake and better exhaust you can use a bit more again... In any case when you do turn it up and before you get the pyro you need to just watch for the smoke out the tailpipe - whenever it starts chugging steady black smoke you just let off the throttle. You won't cloud up three lanes of traffic if you're smart with the fuel increase amount.
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well I don't know what the tune is cause 6 months after I bought the truck in 2005, the IP crapped out on me then three days later the radiator went. That was one h*ll of a week lol. I mainly use my truck to haul cars cause even though I was laid off from my mechanic job i still use it to get cars to do side work. The biggest load I pull is once a year around thanksgiving to the NC mountains to get 600 X-mas trees on a 32' gooseneck. Thats one heavy load. third gear 26mph and losing the traffic behind me in coals is all she'll do. Thats when I realize just how weak my NA IDI is. LOL
Post Fiend
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From: Nutter Fort, WV
Sounds like it is getting plenty of fuel if it blows that much smoke pulling.
Turning the fuel up only affects the max fuel delivered.
So it don't do anything but make the black roll before the pedal is down on the floor.
175 HP at the flywheel, moving a truck around 7000 pounds, then adding a 32' goosneck, probably another 6000 pounds, so you are looking at 6.5 tons before you put the first tree on it.
Then I am going to guess 600 trees, probably close to 12,000 pounds there.
So that looks like 25,000 pounds gross to me.
12.5 tons with 175 HP engine moves slow?
Turning the fuel up only affects the max fuel delivered.
So it don't do anything but make the black roll before the pedal is down on the floor.
175 HP at the flywheel, moving a truck around 7000 pounds, then adding a 32' goosneck, probably another 6000 pounds, so you are looking at 6.5 tons before you put the first tree on it.
Then I am going to guess 600 trees, probably close to 12,000 pounds there.
So that looks like 25,000 pounds gross to me.
12.5 tons with 175 HP engine moves slow?
Postmaster
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From: Malahat/Cowichan Valley
Sounds like it is getting plenty of fuel if it blows that much smoke pulling.
Turning the fuel up only affects the max fuel delivered.
So it don't do anything but make the black roll before the pedal is down on the floor.
175 HP at the flywheel, moving a truck around 7000 pounds, then adding a 32' goosneck, probably another 6000 pounds, so you are looking at 6.5 tons before you put the first tree on it.
Then I am going to guess 600 trees, probably close to 12,000 pounds there.
So that looks like 25,000 pounds gross to me.
12.5 tons with 175 HP engine moves slow?
Turning the fuel up only affects the max fuel delivered.
So it don't do anything but make the black roll before the pedal is down on the floor.
175 HP at the flywheel, moving a truck around 7000 pounds, then adding a 32' goosneck, probably another 6000 pounds, so you are looking at 6.5 tons before you put the first tree on it.
Then I am going to guess 600 trees, probably close to 12,000 pounds there.
So that looks like 25,000 pounds gross to me.
12.5 tons with 175 HP engine moves slow?
I'd say it does pretty damn well. when i had the two yards of pea gravel and 5 tons of horse and trailer behind me and i could get around just fine i was content, not disappointed.
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LOL its not blowing that much smoke, bit of exaggeration there. It only gets like that on the really steep grades of like 9% grades or so. Not enough to lose traffic but enough to really notice looking at the pass. mirror. Once we get out of the mountains with that load it hardly smokes at all cept when I have to reaccelerate when I have to slow for traffic and I gear too low and "chug" the engine a bit. I figure a load like that and it hardly smokes cept on the big grades, thats why I wonder if it could handle a little more cause I'm looking to haul 700 trees next year. I guess I'll make it or break it, but with my Ford Diesel IDI at the helm I think I stand a good chance.
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From: Malahat/Cowichan Valley
i think you will be fine, just make sure that if you do go turbo that the "old idi" can handle it. I am running my 7.3 into the ground then throwing in the upgrade with all the turbo it can handle. i just dont see the point in getting a turbo for this old fella! haha
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Well even if it blows I have an 88 and a late 92 ambulances in the yard with the same engine I could rebuild......now if I only had the money......? H*ll I even have an 88 Ford ranger with a 4 banger in it lets jerk it out and put a turbo-ed 7.3 IDI in it. Think about the possibilities with that one. LMAO....