Straight Stack gains MPG???
Ok, I know people don't like straight stacks because they are too noisy (hence why I'm getting a Tri-Pac so i don't have to idle and keep you fellow drivers up all night)
But I'm here to talk about MPG gains....... I recently needed to replace my muffler due to rust. I was going to put another Donaldson on it when a buddy of mine told me he had a 6" bull-turn off his KW just sitting in his shop. I took a look, gave him $50 and a case of beer and off I went. Had to buy a 5 to 6 adapter and now it has been on the rig for 2 months. It is not too loud and the fact I pull a tank probably helps since I'm not resonating off a trailer bulkhead. Anyways, i do the EXACT same run every week. Same weight, same roads, same speed, everything. I was getting 8.5mpg on average before, but after I swapped out the exhaust, I have gone up to 9.0-9.2 avg so far for the last 9 runs I have done. I honestly didn't expect this...... did anyone else? Just wondering if anyone else has experienced a gain with losing the muffler? |
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The gain in mpg's is probably due to less back pressure if I had to guess. I don't think the dot is gonna like it much. The scales in MD gave a friend of mine a hard time because he had a resonator not a muffler. They couldn't see the resonator or something like that. Never know though the dot might not ever say a word to you about it. |
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As far as the DOT, I have pre-Pass and luckily I have not gotten a red light in a year...... but lord only knows. It is a '98 spec engine so maybe they would take it easy on me since it's pre-emissions HAHAHAHA Yea right. Oh well, like I said, it's no louder than the new Cascadia daycabs with the Urea motors (damn things sound like a freight-train) |
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