Exhaust size?
Thread Starter
|
Senior User
Joined: Dec 2003
Posts: 118
Likes: 0
Exhaust size?
Apologies for the newbie question. Can anyone advise me what size exhaust i should put on my 1985 f100 302 efi? Currently it has a small- ish exhaust which sounds like a vaccum cleaner, it is about too fall off anyway, I wan't people to know what's up front. I don't want to put extractors on it (insurance will knock me back). I don't wan't to go too loud just something in between. Any advice would be much appreciated. Thanks in advance.
Chris
Chris
Elder User
Joined: Oct 2002
Posts: 513
Likes: 0
From: Lincoln NE
fordeverpower is right about the pipe size. Nothing below 2.5" for pipe.
The bigger the pipe, the more reduced your back pressure will be, thus giving you a small increase in horsy's and a little bit better gas mileage.
The bigger the pipe, the more reduced your back pressure will be, thus giving you a small increase in horsy's and a little bit better gas mileage.
Senior User
Joined: Apr 2003
Posts: 111
Likes: 0
Originally posted by nzabka
fordeverpower is right about the pipe size. Nothing below 2.5" for pipe.
The bigger the pipe, the more reduced your back pressure will be, thus giving you a small increase in horsy's and a little bit better gas mileage.
fordeverpower is right about the pipe size. Nothing below 2.5" for pipe.
The bigger the pipe, the more reduced your back pressure will be, thus giving you a small increase in horsy's and a little bit better gas mileage.
Thread Starter
|
Senior User
Joined: Dec 2003
Posts: 118
Likes: 0
Originally posted by NorthernFord
I'm running 2.5" duals, no headers, flowmaster mufflures, and no cross-over pipe, seems to have a real bark at 2000-2500rpm
I'm running 2.5" duals, no headers, flowmaster mufflures, and no cross-over pipe, seems to have a real bark at 2000-2500rpm
Thanks NorthernFord.What's it sound like idling?
Chris
Trending Topics
Senior User
Joined: Apr 2003
Posts: 111
Likes: 0
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Junior User
Joined: Jan 2004
Posts: 88
Likes: 0
ACCORDING TO BORLA, FLOWMASTER,DYNOMAX & MEGAFLO EXHAUST COMPANYS, THEY ALL RECOMMEND 2.0 INCH DUEL EXHAUST OR 2.5 INCH SINGLE EXHAUST FOR THE 302.
A 2.5 INCH DUEL EXHAUST WOULD HAVE A DEEPER TONE, AND A CROSS AT LEAST 13 INCH IN FRONT OF MUFFLERS. 17 INCH PREFERED.
A FRIEND HAD A 351 FUEL INJECTED F-150 4X4 STOCK MOTOR OTHER THAN MSD IGNITION & K&N AIR FILTER, 1990 MODEL, IT RAN 16.1 @ 92MPH WITH 2.5 DUELS, FLOWMASTER DELTA FLOW 40 SERIES MUFFLERS AND CROSSOVER. THE EXHAUST GOT DESTROYED ON A ROCK WHILE 4 WHEELING. THE SHOP THAT REDONE IT RECOMMEDED 2 1/4 INCH DUELS WITH A CROSSOVER & FLOWMASTER DELTA FLOW 40 SERIES MUFFLERS.
THE TRUCK RAN A LITTLE QUICKER. 15.9 @ 94 MPH. SAME TRACK
( BRISTOL TN.) TRUCK HAD 79,000 ON FIRST RUN AND 87,000 ON SECOND RUN. OUTSIDE TEMP. WAS 85 DEGREES FIRST TIME AND 87 DEGREES THE SECOND TIME.
A 2.5 INCH DUEL EXHAUST WOULD HAVE A DEEPER TONE, AND A CROSS AT LEAST 13 INCH IN FRONT OF MUFFLERS. 17 INCH PREFERED.
A FRIEND HAD A 351 FUEL INJECTED F-150 4X4 STOCK MOTOR OTHER THAN MSD IGNITION & K&N AIR FILTER, 1990 MODEL, IT RAN 16.1 @ 92MPH WITH 2.5 DUELS, FLOWMASTER DELTA FLOW 40 SERIES MUFFLERS AND CROSSOVER. THE EXHAUST GOT DESTROYED ON A ROCK WHILE 4 WHEELING. THE SHOP THAT REDONE IT RECOMMEDED 2 1/4 INCH DUELS WITH A CROSSOVER & FLOWMASTER DELTA FLOW 40 SERIES MUFFLERS.
THE TRUCK RAN A LITTLE QUICKER. 15.9 @ 94 MPH. SAME TRACK
( BRISTOL TN.) TRUCK HAD 79,000 ON FIRST RUN AND 87,000 ON SECOND RUN. OUTSIDE TEMP. WAS 85 DEGREES FIRST TIME AND 87 DEGREES THE SECOND TIME.
Senior User
Joined: Apr 2003
Posts: 111
Likes: 0
yes and that is due to torque, but you have to remember that you horsepower/torque curve changes when you modify any engine components, and if you do not modify your drivetrain to match, then your vehicle will run slower, in my case I have all the torque I could want due to 4.11:1 diff ratios and a t-18 tranny, and I needed a little more hp to motivate my tires in the mud.
Senior User
Joined: Apr 2003
Posts: 111
Likes: 0
[QUOTE]Originally posted by mopar
[B]ACCORDING TO BORLA, FLOWMASTER,DYNOMAX & MEGAFLO EXHAUST COMPANYS, THEY ALL RECOMMEND 2.0 INCH DUEL EXHAUST OR 2.5 INCH SINGLE EXHAUST FOR THE 302.
A 2.5 INCH DUEL EXHAUST WOULD HAVE A DEEPER TONE, AND A CROSS AT LEAST 13 INCH IN FRONT OF MUFFLERS. 17 INCH PREFERED.
you can't always build you truck to aftermarket specs, you have to build it for the way that you will use it.
[B]ACCORDING TO BORLA, FLOWMASTER,DYNOMAX & MEGAFLO EXHAUST COMPANYS, THEY ALL RECOMMEND 2.0 INCH DUEL EXHAUST OR 2.5 INCH SINGLE EXHAUST FOR THE 302.
A 2.5 INCH DUEL EXHAUST WOULD HAVE A DEEPER TONE, AND A CROSS AT LEAST 13 INCH IN FRONT OF MUFFLERS. 17 INCH PREFERED.
you can't always build you truck to aftermarket specs, you have to build it for the way that you will use it.
Junior User
Joined: Jan 2004
Posts: 88
Likes: 0
[QUOTE]Originally posted by NorthernFord
[B][QUOTE]Originally posted by mopar
ACCORDING TO BORLA, FLOWMASTER,DYNOMAX & MEGAFLO EXHAUST COMPANYS, THEY ALL RECOMMEND 2.0 INCH DUEL EXHAUST OR 2.5 INCH SINGLE EXHAUST FOR THE 302.
A 2.5 INCH DUEL EXHAUST WOULD HAVE A DEEPER TONE, AND A CROSS AT LEAST 13 INCH IN FRONT OF MUFFLERS. 17 INCH PREFERED.
you can't always build you truck to aftermarket specs, you have to build it for the way that you will use it. [/QUOTE
This is info for the way you will use it!!!
Its also by many years of trial and error... Suggestion was for, to access different companys and other people, to determine what works for the vehicle and type of driving it will encounter..........
[B][QUOTE]Originally posted by mopar
ACCORDING TO BORLA, FLOWMASTER,DYNOMAX & MEGAFLO EXHAUST COMPANYS, THEY ALL RECOMMEND 2.0 INCH DUEL EXHAUST OR 2.5 INCH SINGLE EXHAUST FOR THE 302.
A 2.5 INCH DUEL EXHAUST WOULD HAVE A DEEPER TONE, AND A CROSS AT LEAST 13 INCH IN FRONT OF MUFFLERS. 17 INCH PREFERED.
you can't always build you truck to aftermarket specs, you have to build it for the way that you will use it. [/QUOTE
This is info for the way you will use it!!!
Its also by many years of trial and error... Suggestion was for, to access different companys and other people, to determine what works for the vehicle and type of driving it will encounter..........
Thread
Thread Starter
Forum
Replies
Last Post
rodriguezfords
1948 - 1956 F1, F100 & Larger F-Series Trucks
10
Jan 25, 2008 05:03 PM
SMF Speed&Custom
1961 - 1966 F-100 & Larger F-Series Trucks
7
Apr 13, 2005 03:36 PM