I read some old post from searching about air filters but I wanted to double check since they were older post.
I have a 1972 MCI 5B with a 6v92 and it has a paper filter. I was thinking about switching out to a K&N but after all the post I read I am thinking a paper Baldwin filter. Am I thinking right?
Quote from: Lifes2short4nofun on January 03, 2018, 08:23:34 PMI read some old post from searching about air filters but I wanted to double check since they were older post.
I have a 1972 MCI 5B with a 6v92 and it has a paper filter. I was thinking about switching out to a K&N but after all the post I read I am thinking a paper Baldwin filter. Am I thinking right?
Paper. You do NOT want to take *any* chance of "dusting" a DD 2-stroke. A bad air filter will literally kill your entire engine. Don't do anything but the best air filter you can find.
K&N may be great for a car or truck, but I wouldn't trust one in a HD commercial type application like in our coaches. There have been incidents of their breakdown in cars to make them suspect. Plus airflow through our engines is at a much higher rate most of the time than a car relative to engine size. Baldwin and comparable commercial brand filters have been proven over hundreds of millions of miles. Also, our air filters should be inspected on a regular basis, especially on trips where constant rain is encountered, especially on the older models that we're originally designed to use oil bath units. We've had reports of engine damage from failed air filters distorting and collasping in the past from what appears to be severe moisture and lack of regular maintenance.
No fan of K&N filters...on anything.
Performance increase by reducing filtering?
If increased airflow is desired, change to a proper larger capacity filter and housing.
Baldwin is one suitable filter supplier, both air and oil.
happy coaching!
buswarrior
I use a Racor 094973002 ECO-BC for my 6V92: https://www.parker.com/literature/Racor/Racor_Engine%20_Air_Filtration_-_ECO-BC_-_7595.pdf (https://www.parker.com/literature/Racor/Racor_Engine%20_Air_Filtration_-_ECO-BC_-_7595.pdf) It's the largest one made, capable of flowing up to 1750 CFM (big enough for a 8V92), all one piece, with 7" inlet and outlet. So far, so good.
Definitely stay away, well away, from those K&N things!
John
Quote from: Iceni John on January 04, 2018, 12:21:58 PM
I use a Racor 094973002 ECO-BC for my 6V92: https://www.parker.com/literature/Racor/Racor_Engine%20_Air_Filtration_-_ECO-BC_-_7595.pdf (https://www.parker.com/literature/Racor/Racor_Engine%20_Air_Filtration_-_ECO-BC_-_7595.pdf) It's the largest one made, capable of flowing up to 1750 CFM (big enough for a 8V92), all one piece, with 7" inlet and outlet. So far, so good.
Definitely stay away, well away, from those K&N things!
John
keep searching, there was a catastrophic/expensive Baldwin filter failure well documented here a few years back. Wix or Donaldson are as low as i would go on the filter totem...
i had a Baldwin oil filter split a seam once. no more red filters for me.
Baldwin is a old filter manufacture I have used them years with no problem,since last Feb Baldwin belongs to Parker if there was a problem Parker will have it solved.
Filter have a shelf life check the dates and don't buy filters over 3 to 5 years old the E bay sellers will sell you 10 year old filters at super buy but you are asking for trouble with those that has been my experience in the past with bargain filters
Quote from: luvrbus on January 04, 2018, 04:27:41 PM
Filter have a shelf life check the dates and don't buy filters over 3 to 5 years old the E bay sellers will sell you 10 year old filters at super buy but you are asking for trouble with those that has been my experience in the past with bargain filters
Thanks for that great information.
Air flow rate means absolutely nothing if you don't know the pressure drop at that flow rate. What is really needed is a graph that shows flow vs pressure drop.
1500 cfm at 5 inH2O may be more air than 2000 cfm at 8 inH2O --- especially if your engine only pulls 5 inH2O . . . .
Quote from: kyle4501 on January 04, 2018, 06:02:29 PM
Air flow rate means absolutely nothing if you don't know the pressure drop at that flow rate. What is really needed is a graph that shows flow vs pressure drop.
1500 cfm at 5 inH2O may be more air than 2000 cfm at 8 inH2O --- especially if your engine only pulls 5 inH2O . . . .
Didn't someone here (Luvrbus maybe?) say that a 6V92 needs 1225 CFM of air at full wellie, so a filter rated at up to 1750 CFM theoretically should work well with minimal restriction. Yes, I wish manufacturers weren't so parsimonious with their information, but Racor doesn't state pressure drop and I don't know what Detroit says, so we can really only guess what will work well. After I installed my new Racor I noticed not only more power, and the turbo sounded louder and seemed to spool up quicker, but I also had less smoke on takeoff. To me it seemed like the engine was now getting more air more easily than before.
John
Forgot to mention what particulate size can pass thru the filter is also important -
K&N filters will pass much larger particles when fresh cleaned (the flow rating they publish), but, as they load up with dirt, they do a better job of cleaning the air ( but at a lower flow rate. )
Detroit has the charts you also add CFM for any bends in intake piping it is all in a engineering service bulletin from Detroit damn now I forgot the number
Racor/parker/eco-boost/ Have all been mentioned. I have a 60 serries(2000 yr) What and where to get filter with housing. I have one off one of the semi now but can not verify age and don't see seria; # on it. Suggestions??? This is a weak point for me as I'm started from scratch. No air filter set up at all. I started with a burned shell with no engine or trans..Bob
Quote from: robertglines1 on January 05, 2018, 02:41:35 PM
Racor/parker/eco-boost/ Have all been mentioned. I have a 60 serries(2000 yr) What and where to get filter with housing. I have one off one of the semi now but can not verify age and don't see seria; # on it. Suggestions??? This is a weak point for me as I'm started from scratch. No air filter set up at all. I started with a burned shell with no engine or trans..Bob
That's where a one-piece filter assembly like the ECO-BC may be easier. Racor also makes the mounting clamps for it, so it would be easy to custom-make the entire intake system. Notwithstanding what's been said about pressure drop, the big one like I use should work well for a Series 60 - a 4-stroke is sucking in half the air volume of a 2-stroke of the same capacity. The downside of ECO-BCs is that they're more expensive than just a filter element itself, so if you're driving a lot that could be a factor: you're paying for convenience.
John
When you own a Prevost, money's no object.:-)
I paid 1200$ for mine. Where is the best place to get new stock? The minimum 1325 CFM according to freightlinner. I have added a larger turbo and a few other changes so the 1750 cfm looks interesting. Jon has the bay full of benjamins I have a gallon of pennies! We both work on our own.
If they have the size you need Bob a Cat dealer will always stock fresh filters,my local NAPA a commercial store rotates his filters every 2 years so watch for the spring filter sale at NAPA ,the internet sales beware you never know what you buy.I use a 1650 cfm on my series 60 fwiw
Thanks for info.!!Never thought about CAT.. Nice people local Wayne Supply. Bob