Quote:
|
Originally Posted by Sleeperau
By now I though It was common knowlwdge about the restriction with the pipe to the airbox? Such people as Jim Mock Motor Sport & tests in the workshop section of aufalcon.com have proved that.Just looking at it you don't have to be a brain surgeon to realise it is restrictive! You quoted it is basically worse than stock??? from the experience with Caspers's car. C'mon, lets be realistic I can see your point of view with the airbox but that comment will ensure you will loose credibility! There maybe some more Non Believers!! I hope you prove me wrong!
|
Thinking about this, there are a couple of plausible factors that might come into play:
1. The larger filter will have lower air velocity through the media and this may promote less turbulence, or even laminar flow within the intake piping. This would be a good thing, as the pressure drop would be surprisingly low.
Somebody with more knowledge of Reynolds numbers for air may be able to advise here.
2. The standard AU tapered intake pipe may be reflecting the intake pulses back toward the intake valves causing a scavenging effect on air from the filter. I've read somewhere that the AU standard intake has an efficiency of greater than 100%, and this pulsing might explain that. Because the taper is long, the effect is probably reduced, but will occur over a greater RPM range.
Possibly a shorter tapered section could be trialled, to match the RPM range of the cam being used and the BBM runners in effect at that range.
Just my 2c worth....feel free to correct me please
