Bigger Exaust?

[n00b]

So right now I have an 85 3/4 ton 6.2L diesel, and am running 2.25" dual straight pipes. Anyhow, my buddy said I should go dual 3" and whatnot. Do you think it would make that big a difference? Thanks

[n00b]

anybody?

[Tungsten]

The only thing you will notice is a little less lower end.

[n00b]

Originally posted by Tungsten
The only thing you will notice is a little less lower end.

really? with the amount of pure wind power flowing out of it I didn't think it would kill my low end.

[Badass69]

Diesels inherent of their design don't need any form of backpressure to make power, ask any guy with a newer diesel truck, first thing done is remove the muffler and straightpipe it. The only advantage of restriction on a diesel is noise issues, you won't lose power, may gain depending on the needs of the truck. My friends old 86 6.2 went from 2.25' duals( multiple things, straights, bottles, normal mufflers) to 2.5" duals dumped under the bed, straightpiped. The truck had a noticeable gain all around and for a 4X4 it got about 26 mpg empty so go for it.

[n00b]

Originally posted by Badass69
Diesels inherent of their design don't need any form of backpressure to make power, ask any guy with a newer diesel truck, first thing done is remove the muffler and straightpipe it. The only advantage of restriction on a diesel is noise issues, you won't lose power, may gain depending on the needs of the truck. My friends old 86 6.2 went from 2.25' duals( multiple things, straights, bottles, normal mufflers) to 2.5" duals dumped under the bed, straightpiped. The truck had a noticeable gain all around and for a 4X4 it got about 26 mpg empty so go for it.

that's what i figured. Yeah, shes straight piped now, but I just wanted to see if going bigger would make a difference or not. I wonder how cheaply i could do this for...

[Tungsten]

Originally posted by n00b


that's what i figured. Yeah, shes straight piped now, but I just wanted to see if going bigger would make a difference or not. I wonder how cheaply i could do this for...

Sorry, Maybe I should read a little better. I did not even notice that you said you had a diesel

[n00b]

Originally posted by Tungsten


Sorry, Maybe I should read a little better. I did not even notice that you said you had a diesel


no worries bro.:middle: :kidding:

[cravnpup]

Originally posted by Badass69
Diesels inherent of their design don't need any form of backpressure to make power, ask any guy with a newer diesel truck, first thing done is remove the muffler and straightpipe it. The only advantage of restriction on a diesel is noise issues, you won't lose power, may gain depending on the needs of the truck.

This is only true of Turbo Diesels. N/A Diesels will make power similar to the way N/A gas engines do (favoring exhaust velocity over pure diameter)... Otherwise, I agree with you 100%...

[n00b]

Originally posted by cravnpup


This is only true of Turbo Diesels. N/A Diesels will make power similar to the way N/A gas engines do (favoring exhaust velocity over pure diameter)... Otherwise, I agree with you 100%...

I would love a t/c 6.5L if I could ever find one for cheap. heh