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Old 05-15-2019, 02:14 PM   #7
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Default Re: 3" straight pipe exhaust - DRTDEVL

Originally Posted by DRTDEVL View Post
OK, I can finally report back.

Yes, it spools faster and makes more power. t definitely helps with fuel economy. Unfortunately, when loaded heavy, it is just too much noise. I had the shop put in a 36" long 3" diameter resonator on Monday, as I was getting a headache driving long distance. Its still straight-through, it just adds a larger section with some glass matting inside to reduce the volume of the resonance that was reverberating through the van's body. Before the trip, I also had them put on a black 6" diameter tip, just to spice things up a bit.

On the plus side, however, I got exactly 20 mpg towing a 93 Chevy truck on an 18' PJ Car hauler to Wylie, TX, and 23.2 mpg pulling the empty car hauler back to La Cruces, NM.
Thats what I wondered about was the noise after driving for awhile, so I put the Walker muffler on. Its also straight through so I doubt its affecting anything.
Thats really good mileage. I assume probably going 60mph on your trip? I think I get like 20mpg too but I do 80 on the interstate and near 70 on highways even up the hills in the passing lane trying to get around the 18 wheelers.
The Stratosphärengleiter
2005 Dodge Sprinter 140" low roof with 5 antennas, 200k, GDE Tuned
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