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Old 04-16-2007, 07:39 PM
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Back Pressure?

I have a 2000 7.3 and am interested in putting straight pipes on. The only question or concern that I have is if this will affect anything negatively? I have a friend who has a 6.0 and his mechanic warned him against straights. He was told that back pressure is needed so it doesn't affect the turbo. Has anyone heard anything?
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Old 04-16-2007, 07:50 PM
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First off WELCOME !

Lots of 7.3 owners run stright pipe, no problems.
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Old 04-16-2007, 07:56 PM
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Your turbo makes all the back pressure you need... Your buddys mech is a airhead...
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Old 04-16-2007, 08:02 PM
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Hack it off and bolt in a 6637 tymar filter. Both jobs might cost 125 all together. TRUST US. It won't hurt a thing (might damage a buddy's ego though)
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Old 04-16-2007, 08:09 PM
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Quote:
Originally Posted by nevada diesel View Post
I have a 2000 7.3 and am interested in putting straight pipes on. The only question or concern that I have is if this will affect anything negatively? I have a friend who has a 6.0 and his mechanic warned him against straights. He was told that back pressure is needed so it doesn't affect the turbo. Has anyone heard anything?
a 6.0 absolutely needs a proper amount of backpressure for the turbo and EGR system to function correctly...BUT on a 7.3...its a non issue...so dont worry about it on your truck..
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Old 04-16-2007, 08:13 PM
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Sweet!

I can't wait to do it now! The sound of straight pipes is sick!! We haul horses alot and everyone even down to my mom drives a diesel in my family but no one has yet to put straight pipes on. It'll be nice being the black sheep!! Thanks guys!
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Old 04-16-2007, 09:12 PM
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Quote:
Originally Posted by Marc View Post
a 6.0 absolutely needs a proper amount of backpressure for the turbo and EGR system to function correctly...BUT on a 7.3...its a non issue...so dont worry about it on your truck..
Again... Total BS... I have installed 6 4" down pipe to 5" systems on 03 and 04 6.0 PSD's and not one has had any issue with "lack of backpressure..." LOL

Turbo makes all the back pressure it needs. END OF STORY...
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Old 04-16-2007, 09:21 PM
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The best EGR is a missing EGR anyways, I thought?! So a straight pipr shouldn't hurt it, lol
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Old 04-16-2007, 09:29 PM
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Quote:
Originally Posted by CSIPSD View Post
Again... Total BS... I have installed 6 4" down pipe to 5" systems on 03 and 04 6.0 PSD's and not one has had any issue with "lack of backpressure..." LOL

Turbo makes all the back pressure it needs. END OF STORY...
i dont know how much of an argument you want to get into...but if you want to get into technicals we can...

the VGT system of a 6.0 runs exclusivly off of backpressure to controll boost. just because you have not "seen" problems doesnt mean they dont exist, and ESPECIALLY with 6.0's, each motor reacts differently to different conditions, so you cant bundle the all together and say "well it worked on mine".....on the 03-04.25 motors the latest programming uses an inferred backpressure reading based off of MAP and BARO readings....the 04.5-07 motors use the EBP sensor along with the readings from the Map and Maf sensors....that alone makes it a completely different ball game between the two builds. there are even more differences between even more years we can go into if you want to as well....

The vaines in the turbo dont "open for less boost and close for more boost" like most people want to think...they open and close to controll BACKPRESSURE, thus controlling the exhast side turbine based on how fast the air has to flow out of the turbo, and if you open up the exhaust pipe side, you have changed the airflow out of the turbo, which changes its operating charactaristics, and not for the better.... if you reduce the exhaust side backpressure too much, even if the truck seems to be driving fine, you can actually reduce its performance. on a wastegated style turbo, like the newer 7.3's have...none of this holds true...but on a 6.0, you are 100% wrong....if you want to get more technical and deeper into it we can...

Last edited by mschn99; 04-16-2007 at 09:52 PM.
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Old 04-17-2007, 04:06 AM
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i own a 07 6.0 & i did the cat delete and added an airaid. i actually seen a slight decrease in mileage, just added a workhorse module, but haven't been anywhere yet to see how much if any improvement i will see. so my question is, with the first two mods i listed having a negative impact?
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