Do they do any good, or make any difference at all?

 

Don't over oil filter otherwise you end up with more problems with your MAF.

 

http://forums.corvetteforum.com/show...3&forum_id=101

 

Yes, they make a difference. As mentioned, to much oil fouls the MAF. But testing has also shown they tend to let in more dirt than an OEM paper filter, especially silica which is believed to be especially hard on the valve tappets. YMMV but I wont run one on my car. Definitely wont get any real HP out of it all by itself. Now on a modified intake? Who knows.

JMHO

 

I believe cartek is getting over 550 HP on stock filter setup...

 

they work well on carburated engines. efi motors use items like maf/mas sensors to monitor airflow. if the filters are overoiled they will mist contaniments (oil) onto the airflow sensor(s). this will result in errounous readings and performance will be effected. if yo simply use the one out of the box and don't oil it yourself, rotate it at maintenance intervals, it will work as advertised. hp/trq gains are relative. you always gotta take advertisement cliams with a grain of salt. solmetimes they will say a 20+ increase but when you check into it, the results are from some other type of engine that was suffering from extreme intake restriction, etc. so, take it for what it's worth and enjoy checking out your products before you purchase them. a dry performance filter works best with efi. however, intake mods. seem to still be in research. it doesn't look like too many folks have found the right combination for the intake without getting into the computer.

 

I've used K&N's on my vettes and camaro Z28's, also a Blackwing on my C5. On my Current C6 I've taken the stock air box and cut the primary covers off flush with the height of the K&N's. This removes any issue of which way the damm pleats run for you **** people. Left the secondary cover in place to protect against water, but proped it up a bit with a piece of foam rubber over the air bridge. This gives plenty of air space entry over the entire filter at once. According to my tunner Ron Zimmer,
"that's about as good as it's going to get". then it's good enough for me.
Now don't get me wrong, I would really like to see an aftermarket get some real good HP numbers, but there not! It's not that the aftermarket people aren't trying to make a good product, It's just that it's not that much better than the stock unit. GM just closed to gap between to two. So the net HP gains are small. Before the stock units were junk like the one on my C5, so the aftermarket made a significant difference. But think about paying $400-$500 for an intake for maybe
3-4HP. That just doesn't compute as a good deal. Remember the product isn't poorly made, it's just that it doesn't make the numbers to justify the cost. Currently my C6 is putting down 390 RWHP, cam goes in this month. Hope to reach the magic 425RWHP. Did it with my C5 so I should make it with this C6. I'll post the number after the install.BTW when I talked to ED at LPE he told me they tried just a straight pipe to the MAF, no filter, a straight shot, and only got 10 flywheel HP that's
8.5 RWHP. This was on there engine dyno of there 500HP head and cam motor. Food for thought.

Andy G.

 

did they run some type of velocity stack ? i thought i read somewhere that some filters will actually improve airflow into the engine as compared to no filter at all.