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 Posted: Sat Jan 22, 2011 2:01 pm |
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Joined: Feb 23, 2010
Posts: 519
Trade Rating: +3
Location: kent
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Could changing the back box decrease MPG by 10 miles??
Quick simple question. Thank youuu
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Posted: Sat Jan 22, 2011 2:03 pm |
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Joined: Feb 07, 2010
Posts: 5575
Trade Rating: +33
Location: Moscow
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Depends. Unlikely but it probably could. When was it last serviced?
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Posted: Sat Jan 22, 2011 2:11 pm |
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Joined: Feb 23, 2010
Posts: 519
Trade Rating: +3
Location: kent
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Hmmmmm, i think about 5 months ago. what should i replace do you reckon? Im trying to get the most out of my car fuel wise.. I got a 4" peco n thinking about going back to standard box to increase the MPG. I dont even drive heavy footed either.
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Posted: Sat Jan 22, 2011 2:46 pm |
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Joined: Feb 07, 2010
Posts: 801
Trade Rating: +2
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i could swear i have heard a couple of people on here, saying new standard exhaust systems or just back boxes have affect their mpg for the worse
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Posted: Sat Jan 22, 2011 2:48 pm |
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Joined: Feb 23, 2010
Posts: 519
Trade Rating: +3
Location: kent
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Rich196/ what u mean? that aftermarket ones have decreased the MPG??
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Posted: Sat Jan 22, 2011 2:55 pm |
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Joined: Dec 04, 2010
Posts: 86
Trade Rating: 0
Location: Norfolk
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I just removed a 4" slash cut from my 1.4 & replaced it with a 2nd hand standard box, my MPG is now improving! and car feels SLIGHTLY quicker now its got some back pressure!
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Posted: Sat Jan 22, 2011 2:57 pm |
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Joined: Feb 23, 2010
Posts: 519
Trade Rating: +3
Location: kent
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JJ0063/ by how much difference is it improving? Im seriously thinking about going back to standard but i dont want a pea shooter of an exhaust
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Posted: Sat Jan 22, 2011 3:02 pm |
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Joined: Jan 18, 2011
Posts: 46
Trade Rating: 0
Location: Southampton
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they would do as the goverment is co2 mad so it could be something to do with that.
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Posted: Sat Jan 22, 2011 3:05 pm |
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Joined: Dec 04, 2010
Posts: 86
Trade Rating: 0
Location: Norfolk
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Well, I used to get 44 miles to £10 @ £1.25pl, so roughly 23mpg (I know..)
I brimmed my tank £55 @ £126.6,, still have half a tank left and have done 194 miles..
havent sat down to work out figures but so far to me that seems better, & the first 40 miles were with the old exhaust!
Cheers
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Posted: Sat Jan 22, 2011 3:13 pm |
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Joined: Feb 23, 2010
Posts: 519
Trade Rating: +3
Location: kent
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JJ0063/ thats a lot better that aint it. and is that with your standard exhaust? not a gti one or any thing
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Posted: Sat Jan 22, 2011 3:16 pm |
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Joined: Dec 04, 2010
Posts: 86
Trade Rating: 0
Location: Norfolk
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seems it so far! when my light comes on i'll do the mpg calculations & report back, but yeah im sure i didnt get much more than what ive done now, to a FULL tank before!
it's a standard 1.4 pea shooter exhaust, thinking about cutting tip short & welding the end can from my old exhaust over the top, so in theory still looking like the slash cut but without the noise etc
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Posted: Sat Jan 22, 2011 3:17 pm |
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Joined: Feb 07, 2010
Posts: 5574
Trade Rating: +11
Location: UK
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what exhaust did you have before jj0063?
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Posted: Sat Jan 22, 2011 3:18 pm |
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Joined: Dec 04, 2010
Posts: 86
Trade Rating: 0
Location: Norfolk
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Im not sure on the make but it was a 4 inch slash cut japcan style, i'll find a pic of it on the car if you like?
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Posted: Sat Jan 22, 2011 3:21 pm |
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Joined: Feb 23, 2010
Posts: 519
Trade Rating: +3
Location: kent
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that is actually a good idea cutting it off then welding it back on the standard one. it wont look stupid will it.
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Posted: Sat Jan 22, 2011 3:22 pm |
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Joined: Dec 04, 2010
Posts: 86
Trade Rating: 0
Location: Norfolk
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