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Old 09-28-2005, 10:31 PM   #1 (permalink)
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turbo vs. non-turbo

I'm always hauling different stuff including cars and trucks and I wanted to ask as far as power is concerned is that can you really feel the difference in a truck with a turbo rather than a truck without a turbo?

I learned in my diesel technology classes that all a turbo does is suck in more air to be compressed in the combustion chamber when the intake stroke takes place.

I've done a lot of different mods to my idi including 3 1/2 " straight pipe and k@n filter and other stuff and I was suprised of the amount of power my truck has even for 206,500 miles but I was still considering a truck with a turbo but would there be much of a difference?
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Old 09-28-2005, 10:46 PM   #2 (permalink)
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Re: turbo vs. non-turbo

[ QUOTE ]
I'm always hauling different stuff including cars and trucks and I wanted to ask as far as power is concerned is that can you really feel the difference in a truck with a turbo rather than a truck without a turbo?

I learned in my diesel technology classes that all a turbo does is suck in more air to be compressed in the combustion chamber when the intake stroke takes place.

I've done a lot of different mods to my idi including 3 1/2 " straight pipe and K&N filter and other stuff and I was suprised of the amount of power my truck has even for 206,500 miles but I was still considering a truck with a turbo but would there be much of a difference?

Edited by MikeMetcaff (09/28/05 11:03 PM)


[/ QUOTE ]

Being as nice as I can, I am going to say that I could pull your truck in half with mine.....get my point?
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Old 09-28-2005, 11:22 PM   #3 (permalink)
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Re: turbo vs. non-turbo

I had an 86 6.9 crew cab dually and then a 93 non-turbo 7.3 which I put over 140,000 miles on then sold it and bought a 99' PSD, and I could not believe how much more power it had over the other two trucks. I now have it chipped with exhaust and I can pull my 8500 toybox up hills like a freight train. Coming off a steep hill at 65+ mph, I have to really get off the thottle because before I know it it is pushing 85 and still accelerating. It is nice to be able to keep up with most traffic going uphill. Go drive one with a load, and you will be buying one!

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Old 09-29-2005, 09:01 AM   #4 (permalink)
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Re: turbo vs. non-turbo

Like posted, there's a tremendous amount of difference in power, especially when pulling a heavy load which a diesel is designed to do. If you live at or tow at high elevation there's even more difference. Non-turboed at high elevation, the higher you climb the more power is lost out the tailpipe in the form of black smoke. With a turbo, pretty much the same increased power even at 9000ft and no smoke. Although ATS sells turbo kits so therefore promotes them, as a mechanic I have to agree with their statement from years back, a diesel engine by it's basic design is made to be turbocharged. Even old loaders, graders, etc, for max efficiency have always been turboed.
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Old 09-29-2005, 09:11 AM   #5 (permalink)
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Re: turbo vs. non-turbo

[ QUOTE ]
...I wanted to ask as far as power is concerned is that can you really feel the difference in a truck with a turbo rather than a truck without a turbo?

[/ QUOTE ]

Absolutely! No question about it. Get a turbo, you will love it.

[ QUOTE ]
I've done a lot of different mods to my idi including 3 1/2 " straight pipe and k@n filter and other stuff and I was suprised of the amount of power my truck has even for 206,500 miles but I was still considering a truck with a turbo but would there be much of a difference?

[/ QUOTE ]

The mods you listed increase airflow. Like you said, that is what a turbo does, force more air into the system. If you thought the other mods made a difference, which they no doubt do, wait till you get a turbo on there.

...danny
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Old 09-29-2005, 10:08 AM   #6 (permalink)
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Re: turbo vs. non-turbo

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can you really feel the difference in a truck with a turbo rather than a truck without a turbo?


[/ QUOTE ]

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Old 09-29-2005, 07:14 PM   #7 (permalink)
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Re: turbo vs. non-turbo

IDI non turbo pulling 5000 lbs up a 6% grade @ 33 MPH, Powerstroke pulling same 5000 lbs up the same 6% grade @ 65 MPH with power leftover and could do more!!!!!!
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Old 09-30-2005, 06:47 AM   #8 (permalink)
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Re: turbo vs. non-turbo

[ QUOTE ]


I learned in my diesel technology classes that all a turbo does is suck in more air to be compressed in the combustion chamber when the intake stroke takes place.



[/ QUOTE ]

Dude, if that's all they're teaching you about turbo technology in that class, might I suggest you find a different school!!!! That's very basically what happens, but that's only a tiny bit of the equation. [img]/ubbthreads/images/graemlins/rolleyes.gif[/img]
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Old 09-30-2005, 08:07 AM   #9 (permalink)
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Re: turbo vs. non-turbo

[ QUOTE ]


I learned in my diesel technology classes that all a turbo does is suck in more air to be compressed in the combustion chamber when the intake stroke takes place.



[/ QUOTE ]
I learned in physics class that all a nuclear explosion does is split a tiny little atom [img]/ubbthreads/images/graemlins/biggrin.gif[/img]
But no kidding, my old non-aspirated 1993 cummins was a D-O-G compared to my 97 powerstroke. No contest. Not even in the same zip-code. I'm guessig the power difference was over 100 hp, and probably 100 tq as well.... Sure felt like it [img]/ubbthreads/images/graemlins/cool.gif[/img]
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Old 09-30-2005, 10:52 PM   #10 (permalink)
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Re: turbo vs. non-turbo

Well.. what are the HP and Torque numbers difference between say the 7.3 non turboed trucks. And the 97 Powerstroke with the turbo and small injectors, NON Intercooled. Then the differences up to the early 99s with the intercooler...??? (The reason I picked the early 99 is because it has closer injector comparisons than the newer 7.3 PSDs.
I mean...the intercooler and SLIGHTLY bigger injectors were good for something like 50hp and 100 lbs of torque I think. BETWEEN TWO TURBO CHARGED motors....
Take the not turbo motor and like the other guy said,, non turbo motor pulling 5k up a 6% grade at 33mph... Turbo charged PSD pulling same load up same grade,,,,at 65mph with more pedal left!
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Old 10-01-2005, 11:09 AM   #11 (permalink)
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Re: turbo vs. non-turbo

If you want to know the difference between a turbo diesel and a non-turbo diesel you have to use the same engine...not an IDI/NA 7.3L against a 7.3L PSD as they are different in so many ways.

When I had my '90 F-350 I looked into putting a turbo on it since I was tired of cleaning the soot off the side of my 5th wheel after every trip. Of course the extra power would have been nice too. However, if you are looking for a turbo the best place is a junk yard, lots of 6.9 and 7.3 engines with holes in the side of the block. That tells me something, If you look at the compression ratios between turbo and non for the same engine you will see that the turbo has a lower ratio. Now when a turbo is placed on an naturally asperated engine not designed for the extra boost of the turbo then nasty things can happen in a hurry. To make matters worse, you need more fuel to use all that extra air, and of course extra fuel and extra air means more power, right? So now we have an engine designed to put out 185hp that now far exceeds the designed power rating. But wait, there's more...everyone knows that to get the most power you need to keep that turbo wound tight, and how do we do that? RPM, that's right, keep your foot on the go pedal and those R's up.
Before too long BAM!!! a rod through the side of the block.

Since I don't like buying engines or changing them out I decided against a turbo for my '90 even though I had one on the workbench that would have bolted right on. Be my luck that it would blow in the most deserted area of the world. Instead I traded it for a 2003 F-350 6.0L PSD. Going from 185hp to 325hp...now that's a real kick in the pants. Not to mention the increased torque, probably doubled.

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Old 10-01-2005, 06:52 PM   #12 (permalink)
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Re: turbo vs. non-turbo

[ QUOTE ]
Well.. what are the HP and Torque numbers difference between say the 7.3 non turboed trucks. And the 97 Powerstroke with the turbo and small injectors, NON Intercooled. Then the differences up to the early 99s with the intercooler...??? (The reason I picked the early 99 is because it has closer injector comparisons than the newer 7.3 PSDs.
I mean...the intercooler and SLIGHTLY bigger injectors were good for something like 50hp and 100 lbs of torque I think. BETWEEN TWO TURBO CHARGED motors....
Take the not turbo motor and like the other guy said,, non turbo motor pulling 5k up a 6% grade at 33mph... Turbo charged PSD pulling same load up same grade,,,,at 65mph with more pedal left!

[/ QUOTE ]

I know there are differences in engine intake hardware between my early '99 7.3 and my son's 2001 7.3 and my brothers 2003 7.3 as I hear and see the differences ( they both seem smoother and quieter, but mine feels quicker). All our trucks have been modified identically for performance. We all have DiabloSports, the same 4" exhaust, all the trucks are lifted 4" and are on 35's, and I can run right with them with or without toyboxes. Their trucks may be heavier since they both have Crew Cab short beds and I have an Extra Cab long bed. All three trucks are 4x4's.

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