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Maintenance & Repair All About Exhaust Systems
90 messages, Last post on Jun 17, 2009 at 1:11 PM
You are in the Maintenance & Repair Forum. Your Host is mr_shiftright
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| How can you tell if a cat is clogged? If a cat is clogged can it rob horse power and gas milelage? | |
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Replying to: 0patience (Apr 04, 2007 5:53 pm) I'm not so sure about that. If you were to replace the cats with high-flowing cats that still allowed the vehicle to pass emissions and no CELs then it would not be illegal. You cannot remove them however if the emissions would increase due to it. -mike
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Replying to: paisan (Apr 27, 2007 8:48 am) Only approved replacment parts may be used, which some cat back systems and high flows are approved. Removing a cat would be a violation. Removing the pre-cats/mini-cats on his vehicle would be a violation. If there is no DEQ inspection, then that may be a different story for them. Federal guidelines talk about alterations, removal and that, but their state may have other guidelines that they go by. |
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I was looking at the Magnaflow web site and according to them it will boost my hp by 11 and increase torque almost as much. Plus it has a nice sound. My question, is there any downside to these systems such as lower gas mileage? Would the intake need to be modified in any way?
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Replying to: oldfarmer50 (Jun 07, 2007 3:13 pm)
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Replying to: oldfarmer50 (Jun 07, 2007 3:13 pm)
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Replying to: Mr_Shiftright (Jun 07, 2007 10:04 pm) The engine in question is a 3.8L with single exhaust. Don't know if it's restricted but stock it's rated at 263hp. The Magnaflow site has some dyno charts to "prove" the horsepower and torque gains. |
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Replying to: oldfarmer50 (Jun 10, 2007 7:22 am) -mike |
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Replying to: oldfarmer50 (Jun 10, 2007 7:22 am) I suppose if your stock muffler is restrictive you could gain maybe...what...1-2HP...but you won't feel it. Nothing wrong if you are just buying "sound". Sound is nice. I like sound. As for the dyno tests, this is a whole can of worms. I am not implying duplicity...sometimes it's just human error. You might find this interesting: http://www.turbomagazine.com/tech/0402tur_dyno_tricks_problems/index.html
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