Losing Backpressure
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Joined: Mar 2004
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Losing Backpressure
I recently put a new magnaflow muffer on my truck, and took out the resonator behind the muffler and spliced in a piece to make it just a normal tailpipe. The pipe sizes are still the same as stock, 3 inch, and really the only difference is the muffler swap and getting rid of that old resonator. Is it possible that i have lost backpressure and thus get lower mileage and power? Its gone down a little but i attribute that to me loving the sound of the new exhaust. My truck is in my sig. Any advice would be great!
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Joined: Feb 2004
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RE: Losing Backpressure
Since my truck only had 600 miles when I installed my catback, I can't really comment losing power with a free flowing exhaust. I did notice an improvement when I added the CAI at around 2000 miles. I assume those mod work together, more air in means more air out.
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Joined: Apr 2004
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From: Southeastern, MI
RE: Losing Backpressure
your stock exhuast pipe size is 3 inches? wierd.
mine's 2.5 but i put 3inch up there now... i also noticed a little low end power loss...
im going to add a tailpipe soon or else just a 3inch turn down....
but then again we are talking about 2 different engines.
mine's 2.5 but i put 3inch up there now... i also noticed a little low end power loss...
im going to add a tailpipe soon or else just a 3inch turn down....
but then again we are talking about 2 different engines.
Joined: May 2004
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RE: Losing Backpressure
ORIGINAL: Matrix04
I recently put a new magnaflow muffer on my truck, and took out the resonator behind the muffler and spliced in a piece to make it just a normal tailpipe. The pipe sizes are still the same as stock, 3 inch, and really the only difference is the muffler swap and getting rid of that old resonator. Is it possible that i have lost backpressure and thus get lower mileage and power? Its gone down a little but i attribute that to me loving the sound of the new exhaust. My truck is in my sig. Any advice would be great!
I recently put a new magnaflow muffer on my truck, and took out the resonator behind the muffler and spliced in a piece to make it just a normal tailpipe. The pipe sizes are still the same as stock, 3 inch, and really the only difference is the muffler swap and getting rid of that old resonator. Is it possible that i have lost backpressure and thus get lower mileage and power? Its gone down a little but i attribute that to me loving the sound of the new exhaust. My truck is in my sig. Any advice would be great!
Joined: Jun 2004
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RE: Losing Backpressure
When you open up exhaust flow you will lose some backpressure. This takes away some TQ and HP in the low rpm's were most people drive. But it will increase HP in the higher rpm's. So you actually gained HP but you need to rev it to get it. But I cant see you losing to much backpressure as long as you still have cats as they are a huge bottle neck.