Air Flow Meter

[Paul Wood]

Question to the expert's

I'm installing a Rover 3.9 injection engine into a vehicle I race 
off road, I need to relocate the air flow meter my question is 

Does it matter how far it is from the throttle body, the Std 
system has it on the end of a bit of flexi pipe approx 200mm long, 
this is not quite long enough for me to mount it easily, I've 
either got to get it much closer (30-40mm) or a little further 
(maybe 300mm which would suit the installation better)

It would also be better (from an installation point) if I use a 90 
degree elbow between it and the throttle body, Will this matter?

Paul
(http://www.cix.co.uk/~paulwood/)