No mufflers No backpressure?
Thread Starter
|
Junior User
Joined: May 2003
Posts: 76
Likes: 0
From: south jersey
No mufflers No backpressure?
I have a 79 F-150 with a 351M. I removed the mufflers and replaced them with straight pipe it sounds good, not too loud at idle but has a nice rumble when I rev it up. I heard that removing the mufflers can burn valves. Can this cause too little backpressure and burn valves or will it be ok like this?
thanks for any opinions on this.
thanks for any opinions on this.
Its Comin Right for us!
Joined: Feb 2005
Posts: 12,158
Likes: 2,638
From: GA
backpresure is bad, the myth about burning valves because of strait pipes is from running open manifolds or someting very short and the cold air rushes in after running for a short time and it hurts the exhaust valves, running straight pipes wont hurt anything but your ears
Lead Driver
Joined: Feb 2003
Posts: 8,140
Likes: 4
From: Oak Harbor, OH
Does it have cats on it? If not then you will want mufflers. You won't burn the valves in it unless you're running no exhaust manifolds at all. The only forseeable problem is that yo're going to lose some torque, and may have trouble getting a load to move off the line. I'd put a nice set of mufflers on it and call it good. Straight pipes are illegal in most states due to noise laws.
Thread Starter
|
Junior User
Joined: May 2003
Posts: 76
Likes: 0
From: south jersey
It has hedmen headers and cats but there bored out.I had stock mufflers and tried glasspacks. I'm not trying to make it loud and annoying just trying to give it alittle bit of a rumble and make it sound like a V-8. right now it sounds like a newer truck with a stock exhaust.
Its Comin Right for us!
Joined: Feb 2005
Posts: 12,158
Likes: 2,638
From: GA
Trending Topics
Posting Guru
Joined: May 2002
Posts: 1,589
Likes: 1
From: AK
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
