theduke Posted July 8, 2014 Share Posted July 8, 2014 Just had a little play with my car I already have a K&N panel filter which makes no difference in noise or performance if im honest, But behind the front grill theres a huge v shaped resonator with an open end the other side of the grill I removed the screws/plugs from the grill and surround enough to get access to the resonator and gently pulled up and off it popped from two rubber grommets put it all back together and theres a fair bit of induction roar now :) Dont know if its been done before but thought id share and its a free mod than anyone with a screwdriver can do, Mines a mk2.5 dont know if the other mk's are the same though 1 Quote Link to comment Share on other sites More sharing options...
mixmasterlooney Posted July 12, 2014 Share Posted July 12, 2014 Mk2.5 has a resonator? Sent from my GT-N7105 using Ford OC mobile app Quote Link to comment Share on other sites More sharing options...
theduke Posted July 12, 2014 Author Share Posted July 12, 2014 Or maybe its a thingydooda? Sent from my GT-S6810P using Ford OC mobile app Quote Link to comment Share on other sites More sharing options...
FOCA Posted July 12, 2014 Share Posted July 12, 2014 If the induction makes more noise it may give the illusion of more power, even if there is less power actually Some of these designs have a tuned length, to resonate at a specific frequency, (range or revs) this may be to increase power/ torque at lower revs, or to "fil in" the flatspot in the midrange NA petrol cars often have reducing the bottom-end power can also give the illusion of more mid/ top end power (sort of a little "power-band") when often the car is slower because of the loss of bottom end grunt and the narrower effective power band Apart from the tuned length, the original intake is probably designed as a cool-air intake (CAI, or CAIS), if you remove or modify the intake so it draws warm, underbonnet air, it can loose power (cooler air= denser charge - more oxegen per cc = more power , warmer air, thinner charge = less oxegen per cc = less power ) - thats how a CAIS or intercooler on a turbo works the people that designed the intake on your car are very knowlegeable/ clever and know what they are doing, it is difficult to improve it (on a modern car) unless you are a tuner/ engineer/ genious etc often its only the likes of Mountune that truly improves intakes, with the likes of K&N often making things worse, in many cases, (in terms of power/ efficiency/ economy- its easy to make it louder) Quote Link to comment Share on other sites More sharing options...
mixmasterlooney Posted July 12, 2014 Share Posted July 12, 2014 So you can say hoe on this forum but not g@y? That is hilarious... FOCA what's your take on replacing the resonator with a straight pipe (plastic/silicone etc) on a tdci rather than the muffled original Sent from my GT-N7105 using Ford OC mobile app 2 Quote Link to comment Share on other sites More sharing options...
theduke Posted July 12, 2014 Author Share Posted July 12, 2014 Thats lot i didnt know about it lol! But it does sound better, feels the same power wise (i still have very little) 10x better than a dreaded induction kit heat soak wise and gives that bit of extra noise you would expect Overall a good compromise for me anyway Sent from my GT-S6810P using Ford OC mobile app 1 Quote Link to comment Share on other sites More sharing options...
FOCA Posted July 12, 2014 Share Posted July 12, 2014 So you can say hoe on this forum but not g@y? That is hilarious... FOCA what's your take on replacing the resonator with a straight pipe (plastic/silicone etc) on a tdci rather than the muffled original Sent from my GT-N7105 using Ford OC mobile app Ideally you need to take the car to a dyno and do A/B comparison runs (stock vs straight pipe) a cheaper alternative is to do timed acceleration runs (safely offroad, of course) in identical conditions- same bit of tarmac, same weater conditions, weight in the car etc like 30-70mph, or tickover to redline in one gear, to see if there is an improvement, and attempt to take human error/ bias out of it, a video may work better than a stopwatch I have found that smoothing out the inside of the airbox helps 1 Quote Link to comment Share on other sites More sharing options...
theduke Posted July 20, 2014 Author Share Posted July 20, 2014 Just incase anyone does remove it be careful not to disturb the bonnet lock had squeeky bum time earlier when i couldnt open it but thanks to the guide section its sorted now phew!..on the plus side ive modified the the resonator to become a scoop and im averaging 0.5 mpg up on what i used to get its no quicker but sounds it lol Sent from my GT-S6810P using Ford OC mobile app 1 Quote Link to comment Share on other sites More sharing options...
Lenny Posted July 20, 2014 Share Posted July 20, 2014 Watch out for large puddles aswell, dont want to scoop that up, Ive drilled some 20mm holes in my airbox lid also helped induction, Plan to change it for a K&N57S before Christmas though, Here's a few picture's : Quote Link to comment Share on other sites More sharing options...
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