I've read several times that dyno testing with the K&N caused a 3-4 HP loss on WRX. Has anyone seen Dyno results from K&N or Amsoil filter with a 2.5 N/A?

Those of you with K&N or Amsoil, do you feel a difference, better or worse?

Bump no one has an opinion?

When I put my K&N on, the only real difference I could say for sure was a little faster throttle response. It may give slightly more power, but my ass-dyno wasn't very well tuned at the time. I had only had my RS for about a month and my only other cars had been a '95 Ranger pickup and an '82 Buick Regal. Not exactly ready for USTCC.

Nevermind
Pete

Nevermind
Pete

this adds new meaning to the term "post whore"

It was slightly better. This was before I put the Ganzflow Intake on. It did feel a bit pepier. It was not like the comercials they have w/ gaining 20 HP :p

I have a ganzflow and amsoil filter. I'm mid-airbox mod right now, will finish it next weekend (don't ask :D). I wanted to finish the airbox b4 changing airfilters (you know, plastic shavings etc.....)

No one uses Amsoil?

Originally posted by imprezton
No one uses Amsoil?

They are basically equivalent, but K&N is easier to get ahold of.

The cars making 20hp with a K&N usually make 250+ to begin with. It's more accurate to say 3-5%

It's still nice to know it adds anything at all. I got scared after I read Vishnu/Others report that dynos for the WRX using K&N actually dropped.

If Shiv says a drop-in permanent filter loses power, I'd be inclined to believe him. He knows what he's talking about when it comes to boosted engines and tuning.

ok... but how bout on naturally aspirated engines and all? this being the NA forum and all :D...

Originally posted by Seraph_6
ok... but how bout on naturally aspirated engines and all? this being the NA forum and all :D...

That was exactly my point, Seraph. I haven't seen them dyno'd on N/A's

"No one uses Amsoil?"

I've ordered an Amsoil filter, hope to get it and pop it in this week.

Jim

The general consensus in NA-land is that Ganz + K&N (or perm filter of preference) is a good combination and gives gains beyond just the Ganz. In my voyages in the intar-web I've only seen one ever article claiming real numbers. There was a guy who tested a bunch of different stuff, changing one thing at a time. All that was said about the K&N was that the drop-in filter with stock intake plumbing added 1 measly HP.

1 hp. given, that's all things stock, but that's less than a 1% increase given stock power is ~165. with an intake adding say 5-7hp on average, assume the K&N does at least as well as on stock. say 1-2 hp increase on top of the actual intake gains. while that is still very little with respect to the car, it is in the area of 20% increase with respect to the intake gains and that's not bad. So it's not really worth anyone's while unless it's modding a mod, really.

I got one for 25 bucks shipped. I figured at the very least it would pay for itself over time. It added a little throttle response, but didn't even register on my butt dyno. I have a home depot intake that's constantly changing as I try out different combinations of tubing each week, so I can't really say if it does much.

That's all I gots.

I have had the Amsoil with the Ganzflow for almost two years and I really like it. I refuse to use a K&N filter due to how much crap gets past them in my past experiences. The Amsoil is a lot thicker and foam where the K&N is just a thin gauze construction.

Just put in the Amsoil filter and PDM intake. Between them it is a little bit zippier.

Jim