Just wondering what others are doing, even though I doubt the gains would be major...

Did you stick with an OEM filter or upgrade to a K&N, etc.?

 

It really doesn't matter either way as long as it's clean.

 

Guess someone needs to read SportsCar.

btw I have a used, but recharged, K&N for sale.

 

What'd you do, put new batteries in it?








I know, you cleaned it and oiled it...just never heard that referred to as "recharged"...

Also, do you really think your one day of dyno work with filters is statistically conclusive?

 

Every time you post you make yourself look more like a newb: http://www.knfilters.com/clningacc.htm

 

did you use official "Filtercharger" oil? 'cause if you didn't, then it doesn't count as a an official "recharge"...

 

If I didn't I would not have said it was recharged.

 

Do you have a month & year of the issue I should refer to?

I've only been an SCCA member since 2006 (i.e. I didn't get Sportscar before then).

 

It was very recent, maybe last month? The issue with Mark Huffman's Lotus D Mod car on the cover...the first issue where they let ULLLLLLLLLLLLLLLLLOSE loose in his new editorial role...

 

Sounds good - I'll take a look this evening. Thanks Mike.

 

Nov 07.

 

ASSt. editorial role ...

 

Thanks. I found the article. I think I'll pass on the used K&N!

The thinness of Green filter is kinda scary. I'm kinda in a toss-up between that and just sticking with the OE filter.

 

That is a great idea for you....btw I have an OE air flter with dyno time only if you want to buy a fresh one.

 

I'll PM you an offer (since I know what you paid for it from the article). If you accept, I can Paypal you the $$$ tonight.

 

Anyone have a scan of, or link to the article? I don't get sportscar (can't seem to find a link to anything on scca's page either). From the discussion here, it seems the OEM filter is probably pretty descent.

 

noticed that they didn't show a dyno run sans air filter ...

 

DISCLAIMER: My scanner at home isn't the best. But I scanned the three pages of the article. I hope it's readable...







My thoughts: The OE filter is decent, but a new Green or K&N filter are slightly better. FWIW, while I'm picking up the virtually brand new OE filter Isley used in this article, I will also be getting a new Green Filter to use at autocross events only. Even though I'll be changing my oil every 2,500-3,000 miles with this car, I don't trust using a Green Filter for daily driving.

 

thanks for the scan.

 

FWIW, I picked up a new Green panel filter yesterday to use at autocross events only throughout the '08 season. If a new Green filter truly makes 5hp & 2lb-ft more than a new OE filter, then it'll be worth the $.

Question to Isley - as the ECU 'learns' that more air is getting into the engine with a high flow filter, will the performance increase you saw on the dyno be reduced over time?

 

We did a lot of dyno runs with all of the filters, and changed them around more than once to try and fool the ECU, our results stayed consistent. I don't think you could spend enough time on the dyno to see if the car learns and compensates, that could take a day or more of driving, and to come back to the dyno on a different day will give different results. Regardless of the actual number, what we found was no matter what order or how many pulls we did, the Green made the most power of the filters will listed.

 

Thanks!

 

Chike, where'd you get the green? Best price I've found is about $61 inc. S&H at Car-stuff.

 

That's cheaper than what I paid Tom. I got mine for $65 shipped off of Ebay.

 

YMMV...but, probably not...literally