K&N Filter

[mattpwc]

Hey guys< im in Nz and have just taken delivry of my new pride and joy, my previous was an au2 xr6 and when I fitted it with extractors, a k & n and went from using 91octane to 98octane I gained roughly 30kw and my fuel economy got better by about 25% due to better breathing and more power per stroke, is this not the case with the turbo? your thoughts are appriciated

[Guest dingah]

Hmm mattpwc, more air through the filter means higher not lower fuel consumption as in order to retain the correct air/fuel ratio more air requires more fuel. THe combination of the two gives slightly more power, however. Logically better fuel consumption should be a fallacy. Maybe due to less weight in the wallet?

Cheers,

Dingah

[teebone]

fitted a BMC panel filter @ $135 dolllars to replace my dirty 30K km original fitment a couple of weeks back (probably didnt really need replacing but was a good excuse).

Cant say I notice any difference in fuel economy but I only really use the Ave reading and havent re-set since fitting the BMC (13L/100Km). Also I have never heard this blow-off and flutter or induction noise that people refer to either before or after fitting (perhaps coz mines an auto?).

The T does now seem a bit more responsive in the mid-range at part throttle.

My view is that it's probably debatable value at $135 to replace a filter in a new T but a worth while upgrade at 30K kms plus, once the original is getting dirty and loosing it's flow capacity.

Havent tried the XR8 2nd CAI mod yet - anyone know how much a new airbox bottom is to replace if you stuff it up or don't like it?

[Pretzel]

The way I understand fuel consumption with reduced inlet restriction (Read better filter) is that assuming you don't make any allowance for more air/fuel, causing more power, therefore greater road speed, that consumption would increase. But the fact that it is then breathing better, you need to back off the throttle (It might only be a couple of percent) which means the car is now doing the same speed as before, but with a small percentage less throttle.

ie. Before say 50% throttle to hold X KM/Hr

After possibly only 48% Throttle to hold the same X KM/Hr

As long as my understanding is correct, putting in a panel filter should increase the enonomy slighly !

This of course doesn't take into consideration the computer compensating for and measuring the increased airflow !

Does anybody know how the computer works out it's A/F ratio ? Does it work off Throttle Position, or would it just take a reading at the Oxy sensor and compensate for a leaner mixture ? If this is the case ignore my ramblings from above and I'll just see what happens in the next couple of weeks when I fit one myself !

[rainy]

  plonky said:

berach of EPA regulations.

whats a berach

[ktford]

  rainy said:

  plonky said:

berach of EPA regulations.

whats a berach

Don't worry he's just using Goldie's dictionary

Scotty