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07-28-2011, 12:24 AM | #1 |
CLIFF
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midpipe=better mpg?
Took off my cats and installed a straight pipe. I am now noticing double my mpg? Or is my sending unit broken?
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"who the cap fit let them wear it" |
07-28-2011, 06:32 AM | #2 |
Drives: 2008 Yaris Hatchback Join Date: Jan 2010
Location: Alabama
Posts: 64
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07-28-2011, 06:38 AM | #3 |
ULTIMATE
Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
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I wouldn't doubt that you are seeing a significant increase in MPG. That's why 50+MPG cars existed long ago and have all but disappeared. With my typical driving pattern, my cat never gets hot enough to actually do anything other than act as a restriction, since it take 5-10 minutes of driving for it to get up to temp and actually do its job.
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07-28-2011, 11:01 AM | #4 | |
Nothing beats a Toyota!
Drives: 2013 Yaris 5 dr liftback Join Date: Jan 2009
Location: Indianapolis, Indiana
Posts: 564
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Quote:
I am interested in any modification that can improve MPG!!!!!!!
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Big Dave Indianapolis, IN Synthetic Oil....its in my car.....for at least 10,000 miles! |
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07-28-2011, 12:41 PM | #5 |
doubling is a bold statement. I am currently getting a consistent average of better than 41mpg. I couldn't imagine a single mod (of any sort) getting me into the 80s. I couldn't imagine all the mods that I could do to this car getting me there. I know people could do it but still.
just curious, what was your mpg and what are you noticing? if it helps, I usually get between 75 and 80 miles before the first bar goes. |
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07-29-2011, 02:36 AM | #6 |
Drives: Yaris Sedan 5MT Join Date: Oct 2008
Location: SoCal
Posts: 865
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Interesting. Show use a months' numbers as soon as you can.
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07-30-2011, 10:48 AM | #7 |
Only Happy When it Rains
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the real problem would be can it pass any test in a state that forces emissions tests? I doubt it sadly.
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Colin Chapman disciple |
07-30-2011, 11:12 PM | #8 |
Drives: 2008 HB, A/T, Power W/L/M Join Date: Oct 2008
Location: LI, New Yawk
Posts: 2,063
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It would have to be removed once a year for smog testing. Get home and put it back on and enjoy another year!
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Never take eyes off opponent - Bruce Lee |
08-01-2011, 06:53 AM | #9 |
08-01-2011, 11:22 AM | #10 |
Obsessed with 1.5L
Drives: '10 PW Yaris Sedan Join Date: Feb 2011
Location: Westminster, MD
Posts: 907
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i fucking doubt it
my car averages 2mpg less with my full performance exhaust, over stock. Just to confirm I threw it back on the other week & been consistantly getting 2mpg less for tank. Of course my car doesn't see much pass 2300rpm, or more then about 1/3rd throttle, so i have no use for more flow...the fucker moves on the top end tho when i do rag it out
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-Greg...the Exhaust Freak. -10 PW sedan 107whp/110wtq, full exhaust, suspension bits, TRD LSD -06 Highlander 3mzfe Limited AWD -82 Malibu, 1uzfe swap -97 Tercel coupe, 1nzfe/4.31 -96 Tercel coupe, Turbo 5efe, autoX -96 Tercel 4dr |
08-01-2011, 11:48 AM | #11 |
Drives: 2008 Polar White LB Auto Join Date: Oct 2008
Location: Metro Detroit
Posts: 1,238
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Only reason I love Michigan...no inspections or emissions :)
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I live my life a quarter pounder at a time. And for those 500 calories or more, I'm free. I need FRIES! Two of them. The big ones. Oh, and I need them tonight. You're lucky the double shot of BBQ sauce didn't blow the seam on your nugget box. There she is, 2 pounds of pure beef. My dad ate it in 9.0 seconds flat. Check it out, it's like this. If I lose, winner takes my happy meal. But if I win, I take the burger and the toy. To some people, that's more important. |
08-01-2011, 12:22 PM | #12 |
Drives: Yaris Sedan 5MT Join Date: Oct 2008
Location: SoCal
Posts: 865
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malibu, I have a performance exhaust (catback) and my car does fine in the mpg department. I agree with you that it opened up some top end power but I don't think it robbed any low end power from what you're insinuating.
I remember a while back someone posted jokingly that the mpg didn't go down because of the mod but because they couldn't keep from enjoying the new exhaust, ie their right foot was their master. I'm into anything that might show improvement but I want the numbers to back it up, other wise it's just the person's wishful thinking. The engine might be sending out a check light but the number's won't lie.
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08-02-2011, 11:24 AM | #13 |
Obsessed with 1.5L
Drives: '10 PW Yaris Sedan Join Date: Feb 2011
Location: Westminster, MD
Posts: 907
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well, mine is manifold back with 1 100cell race cat, stock these things have 2 400cell cats...so if your cat-back then you still have the low flowing cats up front...which of course are not really hurting anything for hypermilers...i have some other things i want to try to see if i can get the best of both worlds.
i'm putting the stock exhaust back on tonight tho
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-Greg...the Exhaust Freak. -10 PW sedan 107whp/110wtq, full exhaust, suspension bits, TRD LSD -06 Highlander 3mzfe Limited AWD -82 Malibu, 1uzfe swap -97 Tercel coupe, 1nzfe/4.31 -96 Tercel coupe, Turbo 5efe, autoX -96 Tercel 4dr |
08-14-2011, 06:36 PM | #14 |
CLIFF
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Sorry for the delay! I really wasnt able to really test it to much cuz i cudnt stand the sound!! If i was manual i wudve kept it. Being auto sucks to have loud exhaust!! So i put back the catalytic before the o2 sensor to turn the cel off. I still see a lil mpg improvement and still lil better performance, but not much.
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"who the cap fit let them wear it" |
08-15-2011, 01:51 PM | #15 |
Nothing beats a Toyota!
Drives: 2013 Yaris 5 dr liftback Join Date: Jan 2009
Location: Indianapolis, Indiana
Posts: 564
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Had to be one reason to like Michigan. There can't be too many others!
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Big Dave Indianapolis, IN Synthetic Oil....its in my car.....for at least 10,000 miles! |
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