exhaust

[fordpower21]

i have a 1992 f250 with the 7.3 in it and i was wondering what would be the best way to go with the exaust on it i want it louder than stock but not super loud basically i want the best flowing i was thinkin maybe dual 3" what do u guys think

 

[69dieselfreak]

youd be better off going with 3.5 single or 4 than duals

 

[crash86]

i have a 5 inch single exhaust and its not to loud but sounds bad@ss and if you have a turbo get ready for a jet

 

[fordpower21]

ok ill probally go with 4in and i was just kinda wondering there isnt a problem with not havein any backpressure is there???

 

[cm1hedge]

Unlike gassers, diesels don't rely on backpressure. It is better to get the exhaust out as quickly as possible.

 

[fordpower21]

ok thanks for the info just another question y is it that these motors dont need backpressure

 

[4x4TruckinGirl]

diesel motors don't need backpressure (not really fer sure on the reasoning, something to do with the compression maybe? i dunno...) but as everyone mentioned 4" best.... I have a 3" DP to 4" then 5" stacks, and it's purty loud but nothing too rediculous...

 

[fordpower21]

k thanks

 

[redneckaggie]

the easier air can get into and out of the engine the better. i would assume the reason for not needing backpressure is that more air can get out of the engine faster meaning that more air can get into the engine more efficiently

 

[fordpower21]

yeah i dont know i know that a diesel is way different than a gasser but i figured with out a turbo a diesel would still need backpressure

 

[seawalkersee]

No. There is no vacuum in the engine so they do not require the reverberation that comes from the scavenging effect that is part of a gasoline engine. There are not any throttle plates. Think of it this way. The faster the gas gets out the better. Now with a gasser, the gas kind of uses the backpressure to adjust how much fuel goes in on the intake side of things. If you used a vacuum guage on the the intake side, you would see how there is no vacuum on the diesel.

SWS

 

[fordpower21]

ok now it all makes sence

 

[Mat J]

Whats a good high flow muffler for a N/A 7.3 with 4" exhaust?

 

[freebird01]

a straight pipe lol...we dont need no steenking mufflers!!!!

 

[Mat J]

I want a straight threw muffler I have heard the N/A is alot louder then with a turbo and it is hard enough to try and hear someone on the phone with the diesel and stock exhaust.