Straight Piped, any harm?
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Freshman User
Joined: Oct 2011
Posts: 39
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Straight Piped, any harm?
We got a 2002 F250 7.3l AT, so far its bone stock performance wise. I want to do a muffler delete with just the stock 3.5" pipe and then put like a 5" tip on the end. Not ready to run a full 4" turbo back so Im hoping this will make it sound a little better.
I talked to a neighbor who said it will harm the engine because the valves need backpressure to function properly, I think thats wrong cause dont the turbo provide the backpressure needed? Wouldnt a free flowing exhaust HELP the engine perform better?
Ive searched and found answers but dad wanted me to post my own topic to be absolutely sure it wont damage anything.
Also we pull a 9K pound camper a few times a year so would a straight pipe help or hurt pulling power?
thanks,
Randy
I talked to a neighbor who said it will harm the engine because the valves need backpressure to function properly, I think thats wrong cause dont the turbo provide the backpressure needed? Wouldnt a free flowing exhaust HELP the engine perform better?
Ive searched and found answers but dad wanted me to post my own topic to be absolutely sure it wont damage anything.
Also we pull a 9K pound camper a few times a year so would a straight pipe help or hurt pulling power?
thanks,
Randy
Senior User
Joined: Jun 2010
Posts: 362
Likes: 1
From: middlesex county, nj
It may hurt your neighbours sleep patterns...but truck wise....no harm, hacked mine off just before the muffler about a year ago....zero problems
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Molon Labe
Joined: Dec 2006
Posts: 5,272
Likes: 1
From: Alaska
I agree with the others, I've been running straight pipes for a few years, And I pull quite a bit.
Although I dont think my neighbors care for my high idle...
Although I dont think my neighbors care for my high idle...
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Mountain Pass
Joined: Jun 2010
Posts: 205
Likes: 3
I did the exact same thing 7 years ago and 100k miles and I have had ZERO problems with the motor. I cut the muffler out and welded in a piece of 3.5" and drove it like i stole it and wouldn't change it back. As far as inspections go, i havnt had a problem.
Senior User
Joined: Nov 2008
Posts: 306
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From: simi valley
when i first did that i just put a turndown on where i cut out the muffler.worked great and egts were much lower.i live in california and theres no problem whatsoever with smog.all they care about is a cat and my 7.3l is a non-catalyst motor so you should be good
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Freshman User
Joined: Oct 2011
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well for noise i think im alright there, my neighbor has a straight piped cummins.
the neighbor that told me that has been working on cars for years, owns a trucking company and usually knows what hes talking about, but i didnt believe him this time.
Thanks all, proved what i already believed
the neighbor that told me that has been working on cars for years, owns a trucking company and usually knows what hes talking about, but i didnt believe him this time.
Thanks all, proved what i already believed
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
"Usually" is the operant here.
Has he been working on diesel cars?
And even if his "trucking company" uses diesels, as a general rule, owners don't know nearly as much about their rigs as their employees do.
Neighbor may be really smart. Dunno'. He certainly gave you incorrect information this time.
Pop
Has he been working on diesel cars?
And even if his "trucking company" uses diesels, as a general rule, owners don't know nearly as much about their rigs as their employees do.
Neighbor may be really smart. Dunno'. He certainly gave you incorrect information this time.
Pop