First, I must say that I believed the mechanic installed a Flowmaster exhaust tubing system on my car with a Magnaflow Muffler, but when I originally wrote up this article, I figured it was all Flowmaster.
My 2 and 1/2 inch Flowmaster exhaust is simply a dream in comparison to the 3/4 inch smaller tubes, which were most utterly not a Flowmaster exhaust and Magnaflow muffler in any shape or form. The torque boost that Auto Bravado's car received in gears one through three was incredible. In other words, my acceleration was much better at lower speeds. Having a larger Magnaflow muffler and exhaust should make a small boost in your power on the freeway, but it'll effect your efficiency even more than in the city. My freeway mileage increased from 46 under the best conditions to 56, even if the on board power didn't seem to increase that much. These results were obtained with a 99 Chevy Prizm, any gains you receive on your car or truck will be individual from your Magnaflow muffler and exhaust especially considering that my Chevrolet has had many other modifications for efficiency, which create power. The base line of where you get more power should be about the same regardless of the vehicle's designs. You'll get more torque or acceleration increases out of the lower speeds if you upgrade to a larger exhaust, and an efficiency increase on the freeway.
Can your exhaust tubing and muffler be too big?
Be warned, if you go too much larger with your Magnaflow muffler and exhaust you will actually get a decrease in your mileage. My friend and mentor put a 3 1/2 inch exhaust on his old Dodge truck - a nice boost from the 3 inch it came with, but he also went for dual exhaust from each side of the V engine. That was just a little too much Flowmaster exhaust for the design of that engine! He had to keep his engine at 2000 RPM's just so it wouldn't die. He had unbelievable power, and a lot of fun for a while, but it had made the truck barely drivable. He went back to bringing the Flowmaster exhaust together with one Magnaflow muffler, leaving the 3 and 1/2 inches of tubing and he had the desired effect: more power, and more efficiency, without a down side.
by AutoBravado
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1 comment:
Does it ever bother the environmentalist in you when you hear a loud flowmaster muffler or other louder than stock exhaust? Did you know it makes that car get better miles per gallon and otherwise improve emissions? So stop cringing. Enjoy the roar! It's good for the for the environment excepting maybe the noise if you're near a nature preserve. :/ - a symbol for confusion, but in this case awkward, intellectual irony.
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