cfm of air cleaner???

mccarlk · April 10, 2009, 05:56:34 PM

hi trying to modify my mci 5 , im down to my last bump in the road, what siz e of cfm filter should i have for a 871ta, thanks

gmpd4104 · April 10, 2009, 06:05:06 PM

all depends on what mods you are making.

Your limiting factor is the scavanger type blower. It will only pass so much air

luvrbus · April 10, 2009, 06:12:56 PM

Mccarlk, use 1100 to 1500 cfm www.donaldson.com I use the ECOLITE system good luck

mccarlk · April 10, 2009, 06:20:22 PM

no mods to the engine , i have installed a 871ta in my mci 5a, have installed larger core rads, and hydraulic fans i controlled by thermo switch, so my space is limited for a air cleaner

luvrbus · April 10, 2009, 06:33:24 PM

Go with the ECO system they move more air in a smaller size they only draw back is the cost they are a sealed unit that comes with the inlet and outlets good luck

buswarrior · April 10, 2009, 06:37:28 PM

Talk to your local Donaldson rep.

That's their gig, directing you to the right product.

Right down to telling you which model of wrecked truck to find it in, instead of buying the housing new, if you prefer.

Have a bit of a look online at the dimensions available, then get yourself some wire coat hangers, some thin cardboard and tape, mock up the biggest thing that will fit and then take your measurements.

happy coaching!
buswarrior

gm4106 · April 11, 2009, 07:29:00 AM

My bus also has an 8V71TA and was told by Donaldson I need at least 1500 CFM. So I went with Donaldson part #G112504.Because the size was perfect to fit where I needed it to. After changing to this filter assembly now with the driver window open I can hear the turbo before I never did.

dvrasor · April 11, 2009, 05:34:28 PM

Call K&N give them your engine specs and they will
tell you the cfm the engine requires

dave rasor 4104-2375

kyle4501 · April 11, 2009, 07:56:36 PM

I've used both, paper & K&N filters. I'll not waste another dime on the over hyped K&N filters.

If a K&N was as good as the hype, wouldn't it make sense that they would be the OE standard? Since they aren't, that leads me to think there are real reasons (based on performance) that paper filters remain standard equipment.

mcilee · April 11, 2009, 08:36:58 PM

Same goes from me, I have lost 2 deisel engines and I feel they were both caused by cloth style rechargable filters. As a test, put a glob of grease on the engine side of your filter. Run your rig for the next 2000-8000 miles and check to see if there is dust on the grease. If all you run is highway they may be fine but if your travels involve gravel or any dusty conditions I would be very wary. They draw more air for a reason, and I have had several top notch mechanics from major shops confirm this. One said the only thing they stop is small rocks.

jackhartjr · April 12, 2009, 05:55:31 AM

Kyle....I have two of the K&N's...I think a lot of folks forget to clean them. Cleaning is not the funnest thing to do...however it is kind of amazing how much dirt comes out of them when you do clean them. I drive mostly highway with almost no dirt roads. Of course there was that time I ran real close to a bus for about 700 miles...
Jack

luvrbus · April 12, 2009, 08:35:02 AM

K&N doesn't make a filter for the DD they made a few and it cost them big bucks.I personally know of 3 8v92's lost with that filter.
Stick with a Donalson , Farr or other name brands air filters are no place to experiment can cost you big dollars.
A 8v71 needs 1100 cfm for the 318 HP engine but more is better good luck

prevost82 · April 12, 2009, 11:06:29 AM

Anyone know what the CFM is for a 8V92ta.

jackhartjr · April 12, 2009, 11:08:22 AM

Clifford, I was wondering if 'more is better'; you confirmed it, thanks.
I need one for our bus. It did not even have the oil bath built in it. Nobody has been able to explain why?
The area where the oil baths should be has the same 50 year old mesh that came on the bus!
I will find a suitable canister...Donaldson... and custom install it.
Jack

buswarrior · April 12, 2009, 11:35:26 AM

Something else to consider in smaller available spaces or big CFM's...

I've seen some nice jobs where two air cleaner canisters have been tucked into the engine room, and joined up with stock white plastic plumbing elbows and pipes from the building supply, with a bit of the original style rubber mixed in strategically for the vibration.

Great compromise to ensure the filters aren't the limiting factor to free breathing when space is small?

happy coaching!
buswarrior