Quote:
Originally Posted by Cmike2780
so scientific. do you have dyno results.
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A few whp can easily change due to intake temps. My first set of runs (with K&N installed) after driving down to the shop with no real cool down (less than 5 min), I made less power relative to
both K&N after a 15 minute cool down or paper filter with a 15 minute cool down.
Allowing for equal cool down time, the K&N filters clearly made a bit more power than OEM, as was most evident comparing the first run for each post-cool down session.
It's entirely possible someone could dyno with a hotter car and see a loss that would incorrectly assumed t obe due to the K&N filters.
Failing that, I have to assume other transient factors like overoiling (can come from K&N overoiled!) or erratic fueltrim corrections --- the K&N's should simply flow better, so it would be weird to lose power even if you didn't gain.