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dual tailpipe question

jagone

Full Member
Joined
May 19, 2007
Messages
25
Location
Mcdonough GA
I know the general consensus for dual tailpipe dia. is 2 1/4". If we are talking 2 1/4" mandrel bends, would 2 1/2" pipes with compression bends keep the exhaust velocity roughly the same? I realize if everyone is talking 2 1/4" with compression bends then the answer is no, but I'm gonna assume mandrels for the sake of this question.
 
Ask KY Bob or Fla Bouy. Or others.  I'm sure they'll jump in here soon.  Apparently whenever someone types their name, they get an alert and show up shortly.
 
You are talking on a stock or slightly modded motor.
I have 2.5" duals after muffler and up to 4" at exit.(ran fine for over 2.5 years and 65K+
But have always planed on FI on the motor.
Some of the members with more experience and Time slips should chime in soon. :wave:
 
well it is stock for now. All I plan on doing is dual exh., CAI, and a tune (be it Nelson or I get brave and decide to try HP)
 
:welcome:to the club jagone.Good luck with your question I would like to know this my self for when I get dual exhaust :wave:
 
My flowmaster system is 2 1/2" , you might check what diameter the major manufacturers are using on their systems and base your decision on that.
 
Any other opinions on this?


I actually found a somewhat honest mechanic today. I went in and asked about dual exhaust and i was told that he had a new exhaust guy and he couldn't do duals on the Avy. I thought that was pretty cool he could have taken my money and done a crappy job.  Now I'm gonna have to find some work he can do. We gotta keep the honest ones in business.
 
jagone said:
Any other opinions on this?


I actually found a somewhat honest mechanic today. I went in and asked about dual exhaust and i was told that he had a new exhaust guy and he couldn't do duals on the Avy. I thought that was pretty cool he could have taken my money and done a crappy job.? ?Now I'm gonna have to find some work he can do. We gotta keep the honest ones in business.
You're right about 2 1/4" being the recommended max for dual pipes but there are a few members running 2 1/2" with no complaints. Just as there are a couple with true duals which are also not recommended. It's my understanding the only downside is a slight loss of torque at the low end. The question is how slight. If you don't tow you probably wouldn't notice it. I've never had duals on an Av but I did have duals on pickups with both 2 1/4" and 2 1/2" pipes. The only thing I noticed was it sounded better with the 2 1/4" pipes. FWIW this was a short bed, reg. cab pickup which has shorter tail pipes than an Av.
 
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