Exhaust Question????
Thread Starter
|
Senior User
Joined: Apr 2003
Posts: 196
Likes: 0
Exhaust Question????
I am going to change my exhaust system. Should I use a 3.5 DP to 4" exhaust or should I use a 4' DP? I have heard thet you can lose some low end torque going to a 4" DP. I have a 2000 F350 CC 4x4 Ford AIS intake, Diablo Predator set on 60HP. Any Ideas would help. Thanks
Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
here is the general rule of thumb regarding downpipes and exhaust sizes. the smaller downpipe you have (stock is 3'',minimum), the more lowend power you will have. but you lose the ability for high-speed flow. i have a 4'' system from turbo back, and the .5'' size in downpipe is negligible, and doesnt really matter IMHO. i would just go 4'' downpipe, there is no rubbing issues with MBRP. it doesnt even get close.
Elder User
Joined: Aug 2005
Posts: 763
Likes: 0
From: Dallas, Texas
Originally Posted by Kwikkordead
It already has a lot of backpressure from the turbo.
A bigger DP flows soo much better that the driver doesn't realize (at first) that the foot doen't have to go down as far to get the vehicle to go. Most people drive the same after the upgrade. 1/2 throttle to 35 mph = 1/4 throttle to 35 mph with bigger pipes. At least that has been my experience (lots of math).
Postmaster
Joined: Mar 2008
Posts: 4,158
Likes: 0
From: Paramount, Ca
I just got my exhaust in the mail today, 4" from the turbo back. Hope to have a chance to install it at work this week.
Trending Topics
Lead Driver
Joined: Jan 2007
Posts: 6,708
Likes: 5
From: Kiowa CO
#1 - lots of PB blaster on the downpipe to turbo clamp to get that bad boy loose.
#2 - a sawzall with long metal blades for removal of old system.
#3 - a extra set of hands to help with the new downpipe installation.
good luck.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
Senior User
Joined: Jan 2008
Posts: 499
Likes: 0
From: southeat Ga.
I didn't need the pb blaster for mine since it came right off but I'll second the extra hands for the down pipe installation. One on the ground and one up top and it goes right in with no problems, try it by yourself and it takes alot more time. Have fun, I love my MBRP system.
Hotshot
Joined: Jan 2008
Posts: 13,144
Likes: 11
From: Rochdale MA
My clamp loostened up but the down pipe was "fused" to the clamp and to the turbo. I stuck a gunner into the end of the cut off downpipe and few "wiggles" and she popped free. Remember to put some high temp never seize on the downpipe turbo connection, and place the clamp in a spot that will make it easier for you to remove if needed in the future.
Postmaster
Joined: Mar 2008
Posts: 4,158
Likes: 0
From: Paramount, Ca
Thanks, I guess I'll have to take a saw zall to work. I have the extra set of hands and I sprayed the dowpipe with PB last week in preperation. Can I do this on the ground or do I need a lift. I figure and hope I can do it with just a jack. Hope it's a little slow at work tomorrow. Just finishing up a job and don't have anything else scheduled. The clamps always stick on these style of turbos, I've learned how to get the clamp already.
Postmaster
Joined: Mar 2008
Posts: 4,158
Likes: 0
From: Paramount, Ca
Thanks, I'll have to take it to my buddie's shop. He has a lift there. I just took in two big jobs today so won't have any free time until late next week. I was hoping to have had a chance to install it today.
Lead Driver
Joined: Jan 2007
Posts: 6,708
Likes: 5
From: Kiowa CO
Thanks, I guess I'll have to take a saw zall to work. I have the extra set of hands and I sprayed the dowpipe with PB last week in preperation. Can I do this on the ground or do I need a lift. I figure and hope I can do it with just a jack. Hope it's a little slow at work tomorrow. Just finishing up a job and don't have anything else scheduled. The clamps always stick on these style of turbos, I've learned how to get the clamp already.