Exhaust Question??
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Cargo Master
Joined: Oct 2008
Posts: 2,308
Likes: 1
From: Elyria, OH
I say drive it with the open pipe if you like the way it sounds. Be sure to reset your trip odometer so we can know how far you get before you get pulled over. I say in town 2 miles, rural maybe the second or third cop you see. I got pulled over in my 88 toyota with header, 2.25" cat, turbo muffler less than 10k miles old and full tailpipe. I'm still pissed 2 yrs later....but I digress
Anyways, will running open 3" pipe hurt anything? (stock2.5 duals to a dual inlet, single 3" outlet from about 5" in front of O2)
Senior User
Joined: Sep 2003
Posts: 126
Likes: 2
With running straight pipes, a 3" should be plenty for a stock engine. Can't say as to whether or not you will get the sound you are looking for. On my '96 I've got true duals (with equalizer pipe) straights with 2" pipes back and then 2.25" tail pipes with 4" tips exiting at the rear corners. Its loud as hell but sounds damn good. I know what you guys are talking about by a straight-piped truck sounding like crap (like a mid 80s chevy with the exhaust falling off of it) but with the right combo you can make it sound pretty good. I ran a flowmaster super 40 2.25" dual in/dual out for a while, it sounded ok but wasn't loud enough 
. Maybe its just the redneck in me but generally speaking I think that trucks usually sound best with duals of some sort and a glasspack style muffler. Flowmasters and the like make them sound like a mustang...
. Maybe its just the redneck in me but generally speaking I think that trucks usually sound best with duals of some sort and a glasspack style muffler. Flowmasters and the like make them sound like a mustang...
Thread Starter
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Cargo Master
Joined: Oct 2008
Posts: 2,308
Likes: 1
From: Elyria, OH
With running straight pipes, a 3" should be plenty for a stock engine. Can't say as to whether or not you will get the sound you are looking for. On my '96 I've got true duals (with equalizer pipe) straights with 2" pipes back and then 2.25" tail pipes with 4" tips exiting at the rear corners. Its loud as hell but sounds damn good. I know what you guys are talking about by a straight-piped truck sounding like crap (like a mid 80s chevy with the exhaust falling off of it) but with the right combo you can make it sound pretty good. I ran a flowmaster super 40 2.25" dual in/dual out for a while, it sounded ok but wasn't loud enough . Maybe its just the redneck in me but generally speaking I think that trucks usually sound best with duals of some sort and a glasspack style muffler. Flowmasters and the like make them sound like a mustang...
. Maybe its just the redneck in me but generally speaking I think that trucks usually sound best with duals of some sort and a glasspack style muffler. Flowmasters and the like make them sound like a mustang...
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
No need to worry man, a motor does not need backpressure and will perform better with a better flowing exhaust system. There is no(zero) danger of doing any damage to the valves on an EFI motor by altering the exhaust system, The computer adjusts realtime for any change in temperature, barometric pressure, and airflow through the engine. Now a carbed motor is totally different, it can't self adjust so you could cause some damage if the carb isn't rejetted.
Thread Starter
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Cargo Master
Joined: Oct 2008
Posts: 2,308
Likes: 1
From: Elyria, OH
No need to worry man, a motor does not need backpressure and will perform better with a better flowing exhaust system. There is no(zero) danger of doing any damage to the valves on an EFI motor by altering the exhaust system, The computer adjusts realtime for any change in temperature, barometric pressure, and airflow through the engine. Now a carbed motor is totally different, it can't self adjust so you could cause some damage if the carb isn't rejetted.
Thread Starter
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Cargo Master
Joined: Oct 2008
Posts: 2,308
Likes: 1
From: Elyria, OH
Senior User
Joined: Jan 2009
Posts: 240
Likes: 0
what u need is a good set of long tube headers and the 44 with a full 3inch thats what im running and it sounds killer ill get a vid with sound tommorrow and about the striaght pipe i watched a vid about exhusts belive it or not u build more hp with a full exhuast running the stock cat and a muffler then with nothing at all ill try to find the vid so u guys can check it out
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Thread Starter
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Cargo Master
Joined: Oct 2008
Posts: 2,308
Likes: 1
From: Elyria, OH
what u need is a good set of long tube headers and the 44 with a full 3inch thats what im running and it sounds killer ill get a vid with sound tommorrow and about the striaght pipe i watched a vid about exhusts belive it or not u build more hp with a full exhuast running the stock cat and a muffler then with nothing at all ill try to find the vid so u guys can check it out
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Chris Henley
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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