Quote:
Originally Posted by Fred68
Absolutely. If the standard filter housing could be insulated from the heat of the rad. It would work much better than standard. The 180's standard filter is nice and large, so should flow well enough. Provided there is plenty of cool air available, power should improve.
Did you know that most pleated paper filters will flow around 4 cubic feet per minute, per square inch of area. An engine requires 2.2 cfpm of air per Bhp. So a 200 Bhp engine requires a filter that can provide 440 cfpm of cool filtered air.
If you work out the area of the standard paper filter in the ZS180, then multiply by 4, you will see that it will flow enough for the engine. Obviously this is when the filter is new. Once it's beginning to clog with debris, it's capacity drops of sharply.
I reckon that K&N cotton filters are hard to beat. They flow as well as new paper and don't clog to fast ether. I've found that foam filters that flow lots of air, don't actually filter that well. Foam that filters well doesn't flow well, this is a bit pointless really.
So a good set up would have a good size filter picking up cool air. Much like the inner wing set up, most in the know favour.
|
Standard setup flows well? Have you seen the diameter of the air inlet on the bottom of the filter box? It is about 1 inch or 30-35mm feeding a 100mm throttle body. Yes the filter could flow that much air IF it could be fed that much air which it can't, done on purpose by MGR to slow down the ZS in speed and BHP to boost the ZT190 figures. Ever wonder why the zt was 190 and the ZS was 180? All key engine parts have the same numbers except the induction and exhaust manifolds.
If you could get the 35mm inlet enlarged you would feel a big difference, Maxogen is worth a good 12bhp just by getting the right amount of air to the engine at ambient air temps.