Is there anything detrimental about soldering a pass through muffler designed for a 3" pipe to a 2.5" exhaust pipe? I might need a muffler for a 2.5" pipe and I'd rather use that muffler than buy a new one. Any disadvantages to doing that?

 

Just buy a 3" venturi for your existing exhaust to run in front of your current muffler. That will enhance flow and give you better low and mid range torque.

They are available for around $50.

 

no disadvantages on this vehicle.

 

There are some additional details not revealed in the initial post. Supercharged, 300hp and currently a 3" exhaust system which has lost low to mid range torque with the advent of a 3" exhaust. What it's suffering from is a lack of velocity after exiting the Y pipe. The 3" exhaust is correct, but the loss of velocity is causing it fall short of it's potential.

 

Technical question: the cause of the problem of the lack of velocity after the Y pipe is the exhaust gases cooling down due to the larger diameter? Or are they slowing down because there is less pressure because there is more volume in the pipe? Or maybe both?

I'm guessing the reason the velocity is lost and the venturi works is (mainly?) because of the second reason, since the venturi wouldn't heat up the already cooled gas, right?

 

sorry...not meaning to hi-jack i just have a ? i believe along these lines...i read in an old thread i looked up about the venturi pipe...but that entire thread was talking about using it with dual exhaust....my ? is: i just had a magnaflow muffler installed and i have lost a lot of low end torque thats pretty noticeable...would the venturi benefit me at all with just having an aftemarket muffler installed and not an entirely new exhaust setup?? and if so where would i tell whoever does it to weld it in?

 

How a venturi works is increasing the gas pressure behind it in the exhaust flow. This in turn will speed exhaust gas velocity.

 

Thanks Jpop.

I remember reading a thread that mentioned the best place to put it was just before the muffler. It might have been the same thread you're referring to (dual exhaust torque loss).

 

Could you guys explain this to me?Just buy a 3" venturi for your existing exhaust to run in front of your current muffler.:t I have been in the Diesel seen for the last10 years! More air in and more air is GREAT on a Diesel!
I want to do Flowmasters on my 07-08 JKs the 06 TJ already has it sounds great and seems to help a little. Thanks for the help

 

From what I´ve learned a more free flowing exhaust does increase top end power but does so at the expense of your low end power.