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Thread: Air box mod wow

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    Default Air box mod wow

    ive done the air box mod on my sri 150 all be ive just took the funnel off the bottom of the box wow what a difference dont think il bother disconecting the battery it seems to run realy well cant beleive a bit of plastic can make that much difference revs alot smoother and quicker feels like a new car ,does this affect the mpg though?

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    Regular Member jimmyred's Avatar
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    Not sure, some people reckon it improves it some reckon it makes it worse. Can't say i noticed mpg difference either way, but felt it definetely improved performance. A lot of people say it didn't do much for them, glad you're one of lucky ones.

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    ive changed it back although performance was brill it knocked my mpg down to around 45 mpg when b4 i was getting around 50mpg cant afford the extra fuel with doing 66 miles to work and back each day but it did make alot of difference on the performance

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    Regular Member jimmyred's Avatar
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    did you give it chance? As above, even if you don't disconnect battery, it takes engine a hundred miles or so to adjust to new conditions, and this may have affected mpg. I am not saying it wasn't the airbox mod, but maybe give the ECU chance to adjust, especially if you are just going off the screen mpg figures, rather than calculating yourself. You might find it levels out and returns closer to 50 over a few days, also your driving style might adjust.
    If I'm honest I think it may have affected my economy slightly, but I kind of think of it as the baseline now anyway; like, I could slightly improve my mpg if I wanted, at the cost of performance. Look at it that way, would you take a small increase in mpg if it meant your car was a lot more sluggish?
    Last edited by jimmyred; 3rd May 2011 at 16:57.

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    your probably right jimmy i gave it about 50 miles or so, ive been out this afternoon and done around 60 miles and was averaging 50.5 mpg but thats keeping it around 60mph ,i may give it a go when i get back to work see if it makes any difference ,the performance as i said was alot better ,pick up was unbeleivable

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    it will only make a difference to economy if you hoof it around

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    Regular Member jimmyred's Avatar
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    I'm lucky in a way cos when I did the mod, I had a few problems with my car, which when i fixed them improved my milage quite a bit, so I didn't notice any change from the airbox mod.
    I also reckon with the car feeling more nippy its tempting to boot it a bit more which might eat a few mpg.

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    Regular Member Al 22 dti's Avatar
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    does this mod apply to the 2.2 dti and if so, what do i do?

    al.

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    Regular Member jimmyred's Avatar
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    i think so....it's in how2's.
    Take lid off air box, you may need to unclip hose to MAF. Underneath filter in base of airbox is a trumpet like thing where air enters. Remove top half of this....thats the airbox mod.

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    Regular Member Al 22 dti's Avatar
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    il have a go later..


    cheers

    al.

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