Air Filter Position - Again! - Test results

[gizard]

I have got myself a dual input digital temperature sensor and have started some testing. So far I have only put probes on the nearside of the car - one just inside the body at the original (2.5L) air filter position and the other one infront of the intercooler and next to the air filter (3L style).

So far my findings are as follows:
1.engine hot and running car stationairy - 2.5 position is around 10c hotter.

2.Engine hot car moving between 5-10 mph 2.5 position starts to cool very rapidly and is between 2-4c COOLER than 3L postion

3.Engine hot car moving between 20-50 mph 2.5 position is between 5-6c COOLER than the 3L position.

4.Engine hot and car moving between 50-70 mph 2.5 position is between 2-3c COOLER than 3L position.


That is all I have down at the moment - but they seem to be interesting findings. I will try the offside postion which is nearer the front turbo which may make a difference but so far it would appear that the old 2.5 postion is better for cooler air unless you want to do burnouts! (i.e develop lots of power but not move!)

[paulcundy]

QED

Paul C


but better than "old 2.5" would be in my modded side pods?

[gizard]

paulcundy said:

QED Paul C but better than "old 2.5" would be in my modded side pods?

Let me see!!! - I can put a temperature probe there too! just to see - are your side pods like the M400's?

[paulcundy]

gizard said:

[quote=paulcundy]QED Let me see!!! - I can put a temperature probe there too! just to see - are your side pods like the M400's?

Not quite.
I've opened up the back end whereas Noble have widened the front end.


Here are mine
http://paulcundy.smugmug.com/gallery/359222/4/19976481


However bear in mind that a temp difference of say 5-10'c at teh air filter is unlikely to massively influence the air temp in the actual manifold. Far more important is to fit a more efficient IC like Matt's from Faulks Performance. That delivers a 20'c improvemnt in air cooling for the inlet manifold and is probably as cheap as moving the filters and a darn site easier to do.

Regards
Paul C

Regards
Paul C

[Adrian W]

Your all missing an important point........the inlet path to both turbos is so long and torturous i.e. runs around and though lots of hot bits, that the initial inlet air temprture becomes academic!

Adrian

[kj-r]

Adrian,
Can't see the difference concerning the pipework, on the 2.5L position you have one long and one short on the 3.OL it's still one long and one short but just opposite sides !
Kevin

[Mr Noble]

How does your scientific experiment measure the added grin factor gained through having the filters in the "fun" position?

[Adrian W]

My point is that whatever position the intake air inlet is in, by the time the air gets to the turbo it is already heated due to the bad pipe/flexi runs.

Adrian

[paulcundy]

Adrian W said:

Your all missing an important point........the inlet path to both turbos is so long and torturous i.e. runs around and though lots of hot bits, that the initial inlet air temprture becomes academic! Adrian

as made explicit in previous posts, if read carefully, but you've probably put it better. the best initial step is to upgrade the IC, as extensively discussed on other threads.
Regards
PauL C


>> Edited by paulcundy on Friday 29th July 16:02