Dodge Cummins Diesel Forum banner

How much power will i gain?

  • zero gains

    Votes: 13 30.2%
  • 10hp

    Votes: 23 53.5%
  • 20hp

    Votes: 5 11.6%
  • 30hp

    Votes: 2 4.7%

How much more power will this give me???

1647 15
So i have all the mods in my sig. Im just got my FBD 5'' in the mail today, should be installing it on sunday. Just curious as to what you folks think will be gained as far as hp. I know companies like mbrp claim something like 30hp or so for their 4'' exhausts, only reason i went with a 5'' over a 4'' is i like the sound better, not because i expect more performance gains.

So what do you guys think?
1 - 16 of 16 Posts

· Registered
Joined
·
4,160 Posts
you may be able to feel it a TINY bit down low but it really isnt that noticable
 

· Registered
Joined
·
1,984 Posts
Discussion Starter · #3 ·
you may be able to feel it a TINY bit down low but it really isnt that noticable
ya im really looking for the power down low for towing, i tow my jeep across the country several times per year. So im really hoping for maybe a tad better mileage, was only getting 12-13 pulling one jeep and trailer
 

· Registered
Joined
·
1,446 Posts
i noticed quite a bit of improvement when i replaced the downpipe. seemed to pull harder on the top end.
 

· Registered
Joined
·
1,984 Posts
Discussion Starter · #5 ·
nice. Im going from the stock exhaust to the 5'' and, to me anyway, it seems what when i added the injectors and cold air intake that and exhaust is the next step for performance. Im not trying to build a racer, just a pull truck
 

· Registered
Joined
·
1,446 Posts
for pulling your jeep, just get a box after the exhaust and you'll be done. i pull my cherokee up any hill i want at 75mph. the only time i have to slow odwn is if it's hot out; the temp starts to creep up.
 

· Premium Member
Joined
·
12,665 Posts
you currently runnin stock exhaust(muffler and all)? yeah you'll prolly notice a difference...and it'll sound a LOT better than it does now
 

· Registered
Joined
·
1,984 Posts
Discussion Starter · #8 · (Edited)
ya the only things left for this truck are a air dog or fass and then a box... other than that this truck is done. I like to keep my daily drivers low key... no need for huge power. And i like getting good mpg, thats why i chose a diesel over a big gas motor.

edit: i put the exhaust on yesterday... it is nice and loud... noticed a slight power increase, but i think i would feel more of a difference towing a load.
 

· Registered
Joined
·
1,446 Posts
i get about 16mpg pulling my xj at 75mph.
 

· Registered
Joined
·
5,648 Posts

· Registered
Joined
·
1,984 Posts
Discussion Starter · #12 ·
i get about 16mpg pulling my xj at 75mph.
it looks like from your avatar you have a camper shell. if it wasnt for the fact that i plan on getting a gooseneck i would buy one. I dont think i get 16 mpg empty at 75 lol
 

· Rescue Tower
Joined
·
11,008 Posts
Well 5" is usually reserved for the very high end, high rpm generating machines. You will see some EGT reductions which will allow you to stay in the throttle longer, but I would have gone with a 4" Exhaust doesn't make power it just enables you to move the exhaust out of the way to reduce EGT's which allows you to apply more fuel. That is where the power comes from..... Always great to ask the questions after you make the purchase...
 

· Registered
Joined
·
1,446 Posts
it looks like from your avatar you have a camper shell. if it wasnt for the fact that i plan on getting a gooseneck i would buy one. I dont think i get 16 mpg empty at 75 lol
yes, it definitely helps! I'll get 20 unloaded.
 

· Registered
Joined
·
1,446 Posts
yeah that's averaged with mostly highway. i've seen about 22 only highway.
 
1 - 16 of 16 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top