exhaust opinions

jtyson8602

Member
Aug 3, 2008
53
0
6
Albuquerque NM
Well I have a 3.5" turbo back exhaust that the previous owner of my truck installed. No cat no dpf. Would it be worth upgrading to a larger size? I dont have a tuner yet due to warranty. I am basically looking for a little more mpg and hopefully some more smoke :D if you guys could give me your expert opinions it would be greatly appreciated
 

Alligator

New member
Nov 9, 2006
1,919
0
0
48
N. Idaho
You are going to get 100 different opinions of what works. The general consensus is a 4" turbo down pipe back is all that is needed. It will flow considerably more than what you have currently. Changing your exhaust will not create any more smoke at all. Only adding more fuel through a programmer/tuner/module can do that, unless you have bad injectors...then it will be white smoke.:)

If you are looking to add mileage and smoke, look into either custom EFI Live tuning through McRatracing.com or look into PPE programmers. If you decide to go with EFI, then you will have unlimited potential with tuning, but it does take a laptop and time to adjust the tuning to your truck. EFI Live is the most used tuning on DD.com, due to its ability to fine tune programming to your truck, not tuning for everyone's truck.

If you go with PPE, they have already taken the guess work out of the tuning process, but it will limit you to the tunes available to that programmer. PPE is by far the best canned tuner in the business. PPE's tuners work for daily drivers as well as racers, by providing several tuning options on one programmer. They have tunes available from 50 all the way to over 400 crank hp. Several trucks similar to yours with this tuner, a built trans and a lift pump have ran high 12 second or lower 1/4 mile times consistently with the Hot+2ET.

If you need any help with PPE tuners or exhaust systems let me know.

Chad
 
Last edited:

Duramax_JP

Active member
Jul 3, 2008
1,088
0
36
You are going to get 100 different opinions of what works. The general consensus is a 4" turbo down pipe back is all that is needed. It will flow considerably more than what you have currently. Changing your exhaust will not create any more smoke at all. Only adding more fuel through a programmer/tuner/module can do that, unless you have bad injectors...then it will be white smoke.:)

If you are looking to add mileage and smoke, look into either custom EFI Live tuning through McRatracing.com or look into PPE programmers. If you decide to go with EFI, then you will have unlimited potential with tuning, but it does take a laptop and time to adjust the tuning to your truck. EFI Live is the most used tuning on DD.com, due to its ability to fine tune programming to your truck, not tuning for everyone's truck.

If you go with PPE, they have already taken the guess work out of the tuning process, but it will limit you to the tunes available to that programmer. PPE is by far the best canned tunes in the business. PPE's tuners work for daily drivers as well as racers, by proiiding several tuning options on one programmer. They have tunes available from 50 all the way to over 400 crank hp. Several trucks similar to yours with this tuner, a built trans and a lift pump have ran high 12 second or lower 1/4 mile times consistently with the Hot+2ET.

If you need any help with PPE tuners or exhaust systems let me know.

Chad


X2

Chad nailed it.
 

Whitetail Addict

Rockin' the stock tune
May 8, 2008
2,350
0
0
South Central Pennsylvania
You are going to get 100 different opinions of what works. The general consensus is a 4" turbo down pipe back is all that is needed. It will flow considerably more than what you have currently. Changing your exhaust will not create any more smoke at all. Only adding more fuel through a programmer/tuner/module can do that, unless you have bad injectors...then it will be white smoke.:)

If you are looking to add mileage and smoke, look into either custom EFI Live tuning through McRatracing.com or look into PPE programmers. If you decide to go with EFI, then you will have unlimited potential with tuning, but it does take a laptop and time to adjust the tuning to your truck. EFI Live is the most used tuning on DD.com, due to its ability to fine tune programming to your truck, not tuning for everyone's truck.

If you go with PPE, they have already taken the guess work out of the tuning process, but it will limit you to the tunes available to that programmer. PPE is by far the best canned tuner in the business. PPE's tuners work for daily drivers as well as racers, by providing several tuning options on one programmer. They have tunes available from 50 all the way to over 400 crank hp. Several trucks similar to yours with this tuner, a built trans and a lift pump have ran high 12 second or lower 1/4 mile times consistently with the Hot+2ET.

If you need any help with PPE tuners or exhaust systems let me know.

Chad


Very well put Chad.

Just an fyi on exhaust......watch the exit location. Get one that exits close to the stock location if you plan to run mud flaps. The previous owner of my truck installed a 4 inch system which exits at a 90* to the truck directly behind the rr tire. Now I have to replace the complete tail section to put on molded flaps otherwise they will melt like the previous flaps.
 

MAXLLY

No Lemming Here
Aug 15, 2007
1,063
0
0
San Diego
I second the exit location issue.

Nothing worse than going out to dinner with the tramp next door... wife for some and the breeze blows her skirt onto the side of your truck and it leaves a big black stain... pisses 'em off. Plus its a mess to work around soot.

Most of the fast trucks run a 4" and they are in excess of 700 HP, we are fine with 4" as well IMO.:)

Good luck with it.
 

jtyson8602

Member
Aug 3, 2008
53
0
6
Albuquerque NM
You are going to get 100 different opinions of what works. The general consensus is a 4" turbo down pipe back is all that is needed. It will flow considerably more than what you have currently. Changing your exhaust will not create any more smoke at all. Only adding more fuel through a programmer/tuner/module can do that, unless you have bad injectors...then it will be white smoke.:)

If you are looking to add mileage and smoke, look into either custom EFI Live tuning through McRatracing.com or look into PPE programmers. If you decide to go with EFI, then you will have unlimited potential with tuning, but it does take a laptop and time to adjust the tuning to your truck. EFI Live is the most used tuning on DD.com, due to its ability to fine tune programming to your truck, not tuning for everyone's truck.

If you go with PPE, they have already taken the guess work out of the tuning process, but it will limit you to the tunes available to that programmer. PPE is by far the best canned tuner in the business. PPE's tuners work for daily drivers as well as racers, by providing several tuning options on one programmer. They have tunes available from 50 all the way to over 400 crank hp. Several trucks similar to yours with this tuner, a built trans and a lift pump have ran high 12 second or lower 1/4 mile times consistently with the Hot+2ET.

If you need any help with PPE tuners or exhaust systems let me know.

Chad

Thanks Chad. Too bad that I cant gain smoke without the tuner. I have a warranty and Im trying not to void it before its up. just in case. But I think I like the sound of EFI live. I will probably end up changing to the 4" exhaust here in a couple months. I dont think I need the 5". I am still contemplating a stack though. We will see. But I dont really need to worry about race tunes and what not. Other than the occasional run with a rice car I dont race my truck. Thats what my mustang is for. The truck is here to pull that piece of crap around lol
 

03 D-max

Honorary "Tosser"
Apr 29, 2008
3,539
0
36
Lowville NY
i like the mbrp exhaust i have the 4" dauls and i like them as for muffler it is up to you straight is a little louder but not real bad most exhast systems come with a muffler so if you think it is to quiet you could get a delete pipe
 

bullfrogjohnson

Big Girl!
Nov 20, 2006
4,167
1
0
39
Locust, NC
I have seen testing that switching from a 3.5" to a 4" decreases backpressure by almost 20%

It has been said that the best exhaust on a turboed engine is no exhaust so I would go with the least restrictions as possible.