At least on cars where the MAF sensor is located close to the TB the ECU got the info of temperature resp. air dense as is. Regardless if warmer or colder air should not make so much of a difference in general, it cannot be good if the air becomes much hotter on the travel way after the measurement when the MAF sensor is located far away of the TB at the airbox. In this case the engine operates with wrong information about air temp/density.
The other relevant point is the optimal calculated length of the air intake hose to achieve the best resonance in terms of a wanted/calculated power output for a given revband.
Talking turbulences, how is the definition. Does it also mean areas of low air pressure? In 2007 I rented a Caterham for a weekend, when driving faster than 140 km I nearly couldn't breath so much underpressure at my drivers position.
Somewhere in the photo gallery there are pictures of my car (or I can repost) the previous owner had an almost identical kit fabricated by a local stainless wilder/fabricator, you must have many such similar chaps local to you....that and a K&N cone filter?
I Had a look through the Gallery but could not find them so have uploaded 2 images again. This work was done by the previous owner of the car. Its been remapped and drives really well with a deep induction noise.
Heinz, I get a similar situation with my Plus8. The air intake sucks in underbonnet air and only points generally towards the side louvres. I measured air temp using my OBD meter whilst on a run. Ambient air was 15 C and incoming air got to 35+C. Very little room to work a cold air source from the cowl area. Big engine and ancilliaries block everything off. Even shielding would be difficult due to space and closeness of parts.That side intake system looks ok, shame the louvres on my car point backwards, forward facing might help air getting in, or channel front of windscreen air past heater fan box. Theory says that every 7C reduced gives about 1% extra bhp. Decent return for low cost mod. I reckon 5 bhp would be straight forward. I am not in the mindset of chasing bhp but would consider improvements without major work. In essence, reduce effects that bleed bhp. I used a shoebox to form an intake to shield air and that looked promising, Heat-Robinson effort but it gave encouraging results.
Colin thanks for the pics. That looks quite interesting. I´m wondering if a paper made filter is also available in this shape. At least for my Honda S2000 13 Years ago Honda used such an air filter made of paper. Where do you have placed the MAF sensor, I cannot see it based on the pics.?
Colin thanks for the pics. That looks quite interesting. I´m wondering if a paper made filter is also available in this shape. At least for my Honda S2000 13 Years ago Honda used such an air filter made of paper. Where do you have placed the MAF sensor, I cannot see it based on the pics.?
All sensors are where they are as OE. All the chap who did the work changed was to take the air inlet side from the airbox and filter(now removed of course) turn it through 180 degrees and out alongside the cooler side of the engine. the car draws cooler air (not cold air) from the inlet manifold side not the exhaust manifold side. When I bought the car I was advised that the car was used by Viezu a UK based tuning company to develop a fuel map for this model, they had it for a day and a claimed 10BHP was achieved, they said there was a lot more in there but it would require a different air intake system and exhaust manifold (but I think we all know that ;-)). Makes for a very tractable and useable car, pulls well from low down and gives upper 40's MPG when in touring mode. It wont keep up with the throttle body cars but when we get to the twisties it gets lively ;-).
Might be easier to explain by saying zoom in on the photo to where the short blue silicon hose is, instead of it having a rubber 90 degree left turn when looked at form this angle it has a 180 degree 'right' turn.....
Has anybody considered that the large and long gap (about ½" by 30"on mine) between the wing and bonnet is a better source of cold air than the side louvers that (unless you have reversed ones) are designed to remove warm air. It looks like the filter box in Heinz's pic is getting some of its intake from this gap? I wonder if a long thin internal scoop would grab cold air better. Any thoughts?
