No muffler... gas mileage?
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I bought the car with the the exhaust the way it is. The muffler was cutout and they just ran pipe and a dual tip that looks like the CME tip. I like they way it sounds, I'm just wondering if it's hindering my gas mileage? I've seen the threads where guys say that they lose low end with no muffler, but I haven't found anything about the gas mileage.
my only other mod is a cai and I can only manage to get 13 mpg at most with city driving shifting before 2k. Freeway I get 26-28 so that seems about normal, but I'd like to get a little better in the city
So is not having a muffler decreasing my gas mileage?
my only other mod is a cai and I can only manage to get 13 mpg at most with city driving shifting before 2k. Freeway I get 26-28 so that seems about normal, but I'd like to get a little better in the city
So is not having a muffler decreasing my gas mileage?
#2
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I bought the car with the the exhaust the way it is. The muffler was cutout and they just ran pipe and a dual tip that looks like the CME tip. I like they way it sounds, I'm just wondering if it's hindering my gas mileage? I've seen the threads where guys say that they lose low end with no muffler, but I haven't found anything about the gas mileage.
my only other mod is a cai and I can only manage to get 13 mpg at most with city driving shifting before 2k. Freeway I get 26-28 so that seems about normal, but I'd like to get a little better in the city
So is not having a muffler decreasing my gas mileage?
my only other mod is a cai and I can only manage to get 13 mpg at most with city driving shifting before 2k. Freeway I get 26-28 so that seems about normal, but I'd like to get a little better in the city
So is not having a muffler decreasing my gas mileage?
Also some stations have "up to 10% ethanol" posted up on their pumps as well and that will decrease your gas mileage too.
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Seafoam helped my MPG, fwiw. You should add it to your list of tune ups. ![Thumb](https://ls1tech.com/forums/images/smilies2/thumb.gif)
https://ls1tech.com/forums/general-m...-your-car.html
I personally don't think the lack of muffler would hurt your gas mileage. A tune should help a lot, maybe you're running crazy rich for some reason? I know when I had a pinched 02 sensor wire, I was running in open loop (limp mode), so the car ran stupid fat and I got horrible mpg's.
A tune should let you know if something's not right.
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https://ls1tech.com/forums/general-m...-your-car.html
I personally don't think the lack of muffler would hurt your gas mileage. A tune should help a lot, maybe you're running crazy rich for some reason? I know when I had a pinched 02 sensor wire, I was running in open loop (limp mode), so the car ran stupid fat and I got horrible mpg's.
A tune should let you know if something's not right.
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I'll try the seafoam when I do the tune up. I just passed 80k so it's not like the car has a lot of miles. And even with a light foot the best i can manage in town is what I stated above. I do plan on doing a full exhaust (lt, maybe true duals) and I'll have it tuned then and see if that helps.
I do have probably a good 200lbs of stereo stuff in the car, think that could do it? I wouldn't quite think so since it'd be just like having a heavy passenger but maybe with the city driving it's enough to make a difference since I can still manage high 20's on the freeway.
I do have probably a good 200lbs of stereo stuff in the car, think that could do it? I wouldn't quite think so since it'd be just like having a heavy passenger but maybe with the city driving it's enough to make a difference since I can still manage high 20's on the freeway.
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if you are getting good MPG on the highway and crap in town its all in the tune im willing to bet if you get it tuned by hp tuners or EFI live by a good tuner it will squeeze 20-30 hp and about 20mpg city 28 hwy no problem
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so even the stock tune could be the reason I am getting bad gas mileage?
& i also know that the blend for winter gas can cause a decrease in gas mileage but this has been going on since I started checking the gas mileage before last summer so it's not the winter blend.
& i also know that the blend for winter gas can cause a decrease in gas mileage but this has been going on since I started checking the gas mileage before last summer so it's not the winter blend.
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Stop and go traffic will hinder the "green"est of cars. Do you drive in traffic alot? Also driving under 2K can put a lot of load on the engine relative to the throttle position.
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Damn.... I see about 20 with WAAAAAY more than a few 5000 rpm runs a tank. Hell I do that many in the first quarter when it's nice. Then again, I have a crappy *** handheld tune, and 3.73s with the lm so who knows.
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Not really traffic, but there's a lot of stop signs and lights in my town so i'm constantly starting and stopping. And with the load on the engine relative to the throttle position, I think I understand what you mean. But all I do is take of and just lightly press the pedal enough to accelerate and shift when it comes to 2k. That isn't putting a load on it is it? I don't lug the motor, atleast I don't think.
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The stop and go is what is killing you. When your stopped, your still burning fuel not racking up miles, burning roughly .5-.8 GPH while moving a distance of 0. When you accelerate, your getting roughly 4 MPG at low speeds. The load thing isnt really relative, just that some people will mash the gas at low rpms in low gear(4th, 5th, 6th) and that will put a high load.
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Yeah, that's kind of what I figured. I basically slowly accelerate and get into 4th gear and only hold it for a couple seconds before the next stop light or stop sign. So that, plus the extra couple hundred pounds of stereo equipment is probably whats doing it. I'll still do the tune up and seafoam, and a tune down the road when i do my full exhaust. Maybe that'll help out some.
Thanks for the help guys.
Thanks for the help guys.