I have got the same setup as picture 1). Do not remember the suppliers name but could have a look at the files if someone needs to know.
I replaced the standard airbox with the short inlet and cone filter. Because of tubes and hoses at the filter area I did not install the cover-box but have a free swinging cone filter now. Everything seems to work well even without the box. The car does sound different when accelerating. Nice noise - but not irritating.
Hannes once: Green M3W; 2013 now: Red 4/4 Sport; 2011 and some practical cars for use in real life
Hannes if you have the time and could send a pic and the suppliers name that would be great. Is she just nicer in sound or do you feel a more direct throttle response/ better high revving? BTW where have you placed the MAF sensor?
the 2nd image shows the repositioning of the sensor the 3rd image shows the oil collector at the position of the former airbox at the front (it gets supplied with the Sigma induction kit)
Hannes once: Green M3W; 2013 now: Red 4/4 Sport; 2011 and some practical cars for use in real life
Thanks guys. I know this topic has been discussed for ages. But I'm motivated to search for a "best compromise".
Do you think it could make sence if I find a new position for the cooling fluid reservoir and free the place for the air filter? But that could become very noisy inside the cabin.......
I know about the Williams development which seems to become a longer story. If the lenght of the tube is appropriate they make a good job if they eliminate the existing heating up of cold air issues as they will use the source of cold air at the front above the cowl more effectively.
On the other hand If you see a Ford Fokus or Fiesta engine bay, the distance between airbox and TB is not too long. May be they have no other possibility due to space issues, may be also they have undertaken correct maths. If so the very long travel way of the 4/4 air flow could mean an issue as well. I don't know which length is best or if Morgan and Ford just use what is a given space.
The standard solution means that the air warms up a lot. The MAF sensor is placed at the airbox and allways shows significant less temperature to the ECU than the TB will see. This means a too fat mixture. Lamba 1 wants to reduce this mixture. At the end you have not enough petrol injected when revving high.
Basically to find out the correct length of travel way combined with a good working filter delivering cold air is the task before I would start to play with a new mapping etc. I must say I'm not in trouble at all. It is the enthusiam to play and research.
Here is my solution which works very well. A K&N filter kit for the Sigma engine. Filter naturally gets benefit of air coming in from louvres. In addition, I routed a cold air pipe from the filter to the front of the car, under the radiator, with an air scoop. Works very well. No noise issues. Allowed me to get rid of the standard air box and feeder pipes. No issues with the engine - Increase in horsepower and mid range performance I have more photos if they are of any use. Rgds G
thanks, yes pictures are always welcome:) The additional cold air pipe routing seems to make sense. And I am wondering if the direction of your filter positioning (90 degrees to the drive direction) and the relatively high mounting helps also to get some more air stream.
