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Post by russell on Dec 28, 2012 15:55:37 GMT
Hi all
I was wondering if anyone could help me? I have a K&N air filter and i just put it on my MGF.. I diden use any pipe or anything i just put it straight on the throttle body.. Does this make any difference? Or would it be better to have some pipe on it?
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Post by jonty1951 on Dec 29, 2012 7:03:26 GMT
TBH, I fitted my Pipercross cone filter in this way, and unless you do racing or track days, I can't see that power has been reduced to any noticeable extent.
I know that it should have cold air ducting fitted, but it's a lot of hassle ( to me anyway!).
For normal road use, it suits me fine ( plus that lovely noise!)
John
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Post by russell on Dec 29, 2012 13:15:42 GMT
Ok cool! Thanks for the comment
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Post by Fast Jan on Dec 29, 2012 23:38:34 GMT
It's not too bad in cold weather on shorter runs, but in the summer or when the engine bay gets hot you may well find you lose a bit of power. I had a K&N on my F and found it suffered from heat soak until I enclosed it. Keep an eye on ebay and breakers yards for a Rover 820 air box - it's a perfect fit for the K&N cone filter  This was mine unenclosed but with some cold air ducts (never fix to the underside on the car - you never know when you're going to be faced with floods)...   And then with the 820 air box and some ducting (to side vents)   |
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Post by russell on Dec 29, 2012 23:59:55 GMT
hi jan yea looks good mate.. so those air ducting twin pipe things are leading down to your side vent is it? i seen a air ducting set on ebay for my Trophy 160 for 30 pounds.. looks good for getting that cold air flow going.. check it out www.ebay.co.uk/itm/271114618008?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649i have good some ally pipe for it so i think i will extend it out a bit and do it like yours with those air ducts and get those side pods from ebay? what do you think?  |
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Post by jonty1951 on Dec 30, 2012 7:59:01 GMT
I had actually thought of fitting ducting to the side vent at one point, until I read somewhere (a rather in depth study in fact), that at speed, the side vents dont actually do anything!
It said it was something to do with the shape and contours of the side of the bodywork, and that the airflow was minimal at that point.
I think this is why some fitted the ducting under the car, which gave some direct air flow ( but as Jan says, not a good idea in our rather "damp" climate").
What it was saying is the side vents were purely a design feature, and not as a definite air intake function.
John
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Post by russell on Dec 30, 2012 11:04:53 GMT
Very interesting comment! I will look in to that ! Thanks again for the time and effort your spending posting on here to help me |
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Post by Fast Jan on Dec 30, 2012 23:10:35 GMT
From my understanding of it, the study you've read was right - the scoops don't pull the air in enough, and certainly not with an open cone (another reason why enclosing the filter gives better results). You can fix the air intake pipes under the car and facing forward where the air will be forced into them and up to the filter (mine were like this for the short time of leaving the cone open) - you just need to be very very aware of the highest possible depth of water you can go through with leaving clearance for the pipes. The scoops you linked to might help with forcing a little extra air in, certainly with the open cone. When it's enclosed, the filter pulls air in anyway so side vent is fine. You're welcome for the comments, any other ideas/questions just ask away |
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