Gas vs PSD
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
haha, I take that back, I love the way you can edit quotes!
Super Moderator
Joined: Aug 2003
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From: Isanti, MN
You got me thinking, 95 dually!
How much power can you gain on a 7.3 without digging into the engine or fuel system? Seems that everyone and their brother like to talk about how long their 7.3s last, but do they really put out comparable power to a modded 6.oh?
How much power can you gain on a 7.3 without digging into the engine or fuel system? Seems that everyone and their brother like to talk about how long their 7.3s last, but do they really put out comparable power to a modded 6.oh?
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
Why so low? My old 6.9 IDI has 170 and no turbo. If i put a turbo on it it would make more than a first gen PSD. Do the 94-97 still have the " crushed down " style pipe from the turbo? I know the 94 IDI turbos did, made the power much lower.
Super Moderator
Joined: Aug 2003
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From: Isanti, MN
Probably because Navistar was hesitant to warrant the engine for such a large increase in power, and Ford likewise for the powertrain. The manufacturer has to account for those who really hammer their vehicles...
Post Fiend
Joined: Mar 2006
Posts: 7,841
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From: Vacaville, Ca
We have the smallest injectors in the 95-97 7.3. Our first set of injectors to upgrade to are called stage 1's and they are stock on 93-2003 trucks.
Our HPOP is the smallest as well, it is a 15*. We upgrade to a 17* which again is stock for the 99-2003. We do not have intercoolers to handle all of the fuel/power produced - EGT's shoot way up, so we install intercoolers from the 99-2003 trucks.
Some of us go further with this and install Stage 2 injectors and then better flowing turbos and larger fuel pumps to make BIG power.
All in all, the OBS stock was not the best 7.3 in the power dept. But they last a looooooooooong time.
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Post Fiend
Joined: Mar 2006
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From: Vacaville, Ca
They came with the crushed down pipe. This is the first thing to go. The Cat and the muffler usually leave at this point as well.
Post Fiend
Joined: Mar 2006
Posts: 7,841
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From: Vacaville, Ca
There are a few trucks that are running in the 10's with the 7.3, but they are not stock.
There are a few trucks that are running in the 11's with the 7.3, and they are more dependable. With high boost pressures though, head gasket failures are not uncommon.
And then there is a lot of trucks running in the 12's that are daily drivers and tow rigs and last for thousands of miles. Again, non of these are stock. The 6.0 cannot handle the MODS and are not dependable.
I know that racing the 1/4 mile is not what most of us want from our trucks, but it is a great test to see how fast your truck is. 17 seconds is pretty impressive for a stock truck, but it will not make the hometown paper. However it will tow the real racecar to the track and back for 10+ years and look good doing it.
There are a few trucks that are running in the 11's with the 7.3, and they are more dependable. With high boost pressures though, head gasket failures are not uncommon.
And then there is a lot of trucks running in the 12's that are daily drivers and tow rigs and last for thousands of miles. Again, non of these are stock. The 6.0 cannot handle the MODS and are not dependable.
I know that racing the 1/4 mile is not what most of us want from our trucks, but it is a great test to see how fast your truck is. 17 seconds is pretty impressive for a stock truck, but it will not make the hometown paper. However it will tow the real racecar to the track and back for 10+ years and look good doing it.
Post Fiend
Joined: Mar 2006
Posts: 7,841
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From: Vacaville, Ca
Well it is not that big but it is large.
Thread Starter
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
There are a few trucks that are running in the 10's with the 7.3, but they are not stock.
There are a few trucks that are running in the 11's with the 7.3, and they are more dependable. With high boost pressures though, head gasket failures are not uncommon.
And then there is a lot of trucks running in the 12's that are daily drivers and tow rigs and last for thousands of miles. Again, non of these are stock. The 6.0 cannot handle the MODS and are not dependable.
I know that racing the 1/4 mile is not what most of us want from our trucks, but it is a great test to see how fast your truck is. 17 seconds is pretty impressive for a stock truck, but it will not make the hometown paper. However it will tow the real racecar to the track and back for 10+ years and look good doing it.
There are a few trucks that are running in the 11's with the 7.3, and they are more dependable. With high boost pressures though, head gasket failures are not uncommon.
And then there is a lot of trucks running in the 12's that are daily drivers and tow rigs and last for thousands of miles. Again, non of these are stock. The 6.0 cannot handle the MODS and are not dependable.
I know that racing the 1/4 mile is not what most of us want from our trucks, but it is a great test to see how fast your truck is. 17 seconds is pretty impressive for a stock truck, but it will not make the hometown paper. However it will tow the real racecar to the track and back for 10+ years and look good doing it.
I need to cough up the cash for a 5 star tune on it, and I am trying to find the PI heads in a junk yard. those 2 things and a gear swap would make it a high 16s, low 17s truck and a much better tow rig.
Posting Guru
Joined: Dec 2006
Posts: 2,498
Likes: 3
From: Windsor, Colorado
From what I have always been told a 6.0 make more power much easier than a 7.3. If you are modding a 6.0 then you are probably covering all the problem areas (egr, head studs, turbo) and therefore making it more reliable.
now if you are just going to put a tuner on a stock motor you are asking for troubles out of each of them if you go run it on a hot setting. You can run them on a low setting and get better mileage and quicker throttle response without damaging anything on a 7.3. don't know about the 6.0.
now if you are just going to put a tuner on a stock motor you are asking for troubles out of each of them if you go run it on a hot setting. You can run them on a low setting and get better mileage and quicker throttle response without damaging anything on a 7.3. don't know about the 6.0.
Thread Starter
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
haha, you pull yours? I have an ex cop car that I pulled all 4 cats off of, man it is so much faster and better sounding!