4" vs 5".. is there really a difference.

[bstanton]

makes sence if you think about it. but im sure there are trucks on the site that has had both 4" and 5" and im also confident in saying that it dont hardly make a difference. So base your decision on exhaust note, not on performance it will provide. IF any itll make egts cooler but again i doubt there will be much difference if your downpipe is stock. Ive never seen EGTs above 1200 degrees. that was pulling my dump trailer with the track steer in it. Dont know what the temp was outside but it was warm mind you, somewhere like 85-95.

[Diesel Dan]

Originally Posted by mackyoudip

Turbos create back pressure, A LOT of it, that's why you can do that.

Diesels have no need for backpressure.

[boostnlb7]

ok, well put.. so why dont we all do muffler deletes on stock pipes and run those? not much diff between stock and 4''... performance.. duh..there may or will not be any diff in performance between 4 or 5 but i will garauntee you that a 5 will flow more than a 4, "especially" if the down pipe is larger than stock.. come on guys...
they sound different for a reason

[Brennan]

Originally Posted by Diesel Dan

Diesels have no need for backpressure.

Every engine has a need for backpressure. Turbo diesels get it from the that huge restriction called a turbo. Why do you think you can put a 4" exhaust on a v6 ecoboost? And yes I know it sounds gay just an example


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[Diesel Dan]

Originally Posted by Brennan

Every engine has a need for backpressure. Turbo diesels get it from the that huge restriction called a turbo. Why do you think you can put a 4" exhaust on a v6 ecoboost? And yes I know it sounds gay just an example


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I didn't know eco boosts were diesels

Has nothing to do with a turbo, N/A diesels don't have a need for exhaust restriction either.

Don't youtube mechanic me

[Brennan]

Originally Posted by Diesel Dan

I didn't know eco boosts were diesels

Has nothing to do with a turbo, N/A diesels don't have a need for exhaust restriction either.

Don't youtube mechanic me

My point wasn't that they're diesel, they have turbos. Please explain to me how a turbo has nothing to do with backpressure.


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[bstanton]

Im sure there is a benifit but i didnt think it was worth another 300 dollars for an inch of piping i may or may not like the way my truck sounds, but it did lower egts considerably.

And i will refer to my last post. diesel or NOT a Naturally aspirated motor needs a certain amount of backpressure. and Boosted Engine wheter it be supercharged or Turbo charged really does not need any amount of backpressure.

How many turbo charged or supercharged race cars do you see with a full exhaust system? And i know alot of N/A race cars dont have full exhaust but the pipe they use are smaller and/or longer. It just makes sence. You forcing air in and out so you dont need backpressure. and with a N/A engine you need a certain amount of backpressure to draw air in as the exhaust gas exits the combustion chamber

[boostnlb7]

to each his own.. lets all run 2'' pipes rfrom turbo back because aperently exhaust size and back pressure do not effect or play a role in how any motor runs or performs..

[bstanton]

are you not reading clearly? Because i know i clearly stated the difference between and Natrural aspirated engine(if you know what that means) and a boosted engine.... Read again.

[boostnlb7]

k, sorry i skim read that, i agree with u.. on our motors needed much or any the up pipes are small enough to create enough