I have reviewed test data of a panel of air filters at http://home.usadatanet.net/~jbplock/ISO5011/SPICER.htm. This data suggests that the Delco filter lasts longer, provides cleaner air to the engine but has the highest resistance to flow of any drop-in replacement filters tested. I don't believe this test included any conical filter configurations which are commonplace in the intake upgrade kits. Does anyone know of similair test data for conical filters? I want more cfm's but not more dirt! Any suggestions!?

I want more cfm's but not more dirt! Any suggestions!?

I don't think I have any direction to steer you for that application.

But I am wondering what your HP application is that you need less resistance in the element.

I will humbly say, cfm (at given resistance) and dirt consumption are inversely proportional, yet reistance is highly dependent on filter SA (surface area). You won't find more SA in any element that matches the Delco, in our limited space. Something like 26 square feet or thereabout.

BTW my only gripe with that study (and it was a GOOD study) was that peak airflows were never considered, 900 cfm test data. I would have LOVED to see dirt influx at that flow rate. I believe THAT is where the truth would switch places, just a guess though.

Keep in mind the rest of the intake, downstream of the minder, drops 40+ inches of water at 900 cfm (calculated estimates). The element is another 5-10, full scale filter minder at 20+ (loaded with dirt). If that helps you with a decision.

What really impresses me, and is often overlooked, is how little head loss there is with the delco, even after trapping 10x the dirt that the others are fully loaded at.

You should update your sig so we know your configuration, also helps if you include your intended use and goals. FYI, there are some high HP trucks around here drawing air through the OEM filter.

moving to Fuel, Air, and Exhaust section

You should update your sig so we know your configuration, also helps if you include your intended use and goals. FYI, there are some high HP trucks around here drawing air through the OEM filter.

I run a 2005 2500HD LLY/A, crew cab, short box, 265/ 75 on factory aluminum. I am just after the "let the engine breath better" improvements. I do not race. I occasionally use the truck for towing heavy loads. More often than not I am looking for economy in my truck. But, like the rest of us I like to punch it from time to time and feel a quick hard response. Right now I have 8,000 miles on the truck and I am only seeing 15-16 mpg. I see others writing in of mpg's in the 18-19 range.

When I started upgrading or modding my truck I put on the AFE pg7. At first it did sound and feel a little peppier. BUT, I now check my filter minder and consistently find it around the 40% mark and sometimes as high as 70 or 80%
This I dont like. When stock the minder never budged. Members on here have tried to explain the reasons to me but I am still leery. IMHO I feel that the stocker kept the air cleaner and allowed more than a sufficient amount of air to get to my engine. However I have no scientific data to support my hypothesis.

See post #2 above, says it all.

.

This site is full of great information.. Thanks guys.

I just saved myself around $400 on a AFE or Volant setup that I was about to purchase. I'm sticking to the stock setup and just keep it clean.

Hmmmm what can I buy now? Maybe a Garmin 330 GPS? LOL