????

 

Stay with the stock one, it works just fine.

 

What he said. If you just have to have one of the others, make sure you wash the oil out before installing or you could end up with a bad MAF.

 

Stay with stock. There are studies showing that paper is the BEST filter. If you use any other filter, the oil kills your MAF, and if you don't use oil, it doesn't filter much. Why sacrifice your $25K engine for what, 6hp?

 

I'm getting ready to REMOVE the K&N unit, in favor of paper...

It's not real hard to damage your MAF sensor with the oil from the drop in filter...I've only done it once, but still... the risk is there... And the minimal amount of performance gain (if any) just isn't worth the risk.

Mike

 

Did you notice a difference between the K&N and the oem filter?

 

I seriously doubt anyone could feel a difference between air filters. I doubt a dyno would even show a difference.

 

K&N and if you are careful with the cleaning of the filter there is no problem !

 

Are you basing this on anything? Data? Reports? Anything at all???

 

I have a BMC filter no problems..

 

That would depend on the power level and restriction of the filter. Turbos do not like restriction on the intake side. Easiest way to test for this is slap a vac gauge between the turbo and the rest of the intake system. If you see vac there's a restriction costing power. I have seen differences in power on a dyno though not with Porsche - and not piddly 1-2HP differences either. Think about how much air it takes to make say 500WHP - that's a ton of air! Engines are air pumps, anything that prevents them from breathing freely hurts. The K&N ads showing various power gains aren't THAT far off especially when an airbox designed to quiet intake noises is replaced too. The issue with oil screwing up MAFs is real though when there's oil involved. I thought K&N was making these with less or no oil now for apps with MAF? The biggest issue I've seen with them is people "cleaning" them and then soaking them with oil afterwards. The testing I've seen shows them flowing better than paper and filtering better with some dirt on them than they do "clean" - leave them alone...

P.S. Paper filters better, it just doesn't flow as well...

 

if you are cleaning it and let it to dry for some hours what would be the problem ?!
why K&N filter only blow the porsche maf's ?

 

"That would depend on the power level and restriction of the filter. Turbos do not like restriction on the intake side. Easiest way to test for this is slap a vac gauge between the turbo and the rest of the intake system. If you see vac there's a restriction costing power. I have seen differences in power on a dyno though not with Porsche - and not piddly 1-2HP differences either. Think about how much air it takes to make say 500WHP - that's a ton of air! Engines are air pumps, anything that prevents them from breathing freely hurts. The K&N ads showing various power gains aren't THAT far off especially when an airbox designed to quiet intake noises is replaced too. The issue with oil screwing up MAFs is real though when there's oil involved. I thought K&N was making these with less or no oil now for apps with MAF? The biggest issue I've seen with them is people "cleaning" them and then soaking them with oil afterwards. The testing I've seen shows them flowing better than paper and filtering better with some dirt on them than they do "clean" - leave them alone...

P.S. Paper filters better, it just doesn't flow as well... "





Like I said, I doubt a dyno would show the difference. Maybe you have before and after dyno results or 60-130 times for 996TTs to show the difference. If not, it's all "theory" or the oh so accurate seat of the pants feel.

 

So the only criteria you are using is "I've seen no problems"??

The original question was "whats the BEST"... this would mean that any recommendation we make should outperform the stock filter.

Unfortunately the K&N filters are WORSE when it comes to actually FILTERING dust!

Nobody talks about this- tens of thousands of posts across the internet and all people talk about is "great mod, my buddies got one, his mechanic said he definitely feels more power"...there is a group compulsion to mod the air filter- that is a foregone conclusion- and people spend their time arguing over which inferior filter will give their engine marginally more power.

Here's my point: even if the k&n doesn't foul the maf, it is an inferior filter since it doesn't filter out as much fine dust as the paper filter.

My 2 cents!

A

 

yup, I have been told that the standard air filter in the 996tt is large enough for some of the biggest hp applications. You are better off going to a dual snorkel intake setup like vivid and UMW have were the stock filter remains but there is two holes in the box to allow more air in. this is much better than installing a less restrictive filter that isn't needed.