Do the 4" paper air filters allow enough air to a stock Holley 94?
#1
04-14-2013, 01:03 PM
Do the 4" paper air filters allow enough air to a stock Holley 94?
Looking to lose the oil bath air cleaner on a stock 8BA flathead. All I can find is the little 4" chrome outfits like this one from Speedway
http://www.speedwaymotors.com/OTB-Ge...FS2CQgodt38Amg
I guess if they didn't allow enough flow they wouldn't be so common, but it seems like a 6 or 8" would be better.
http://www.speedwaymotors.com/OTB-Ge...FS2CQgodt38Amg
I guess if they didn't allow enough flow they wouldn't be so common, but it seems like a 6 or 8" would be better.
#2
04-14-2013, 01:07 PM
#5
04-14-2013, 08:03 PM
Freshman User
Join Date: Apr 2012
Location: Temecula, California
Posts: 29
Likes: 0
Received 0 Likes
on
0 Posts
I searched out a article showing in detail how to convert your oil bath filter to a paper filter. Did it right after I purchase my truck a year ago and have had no issues. Original look with a modern filter. I will look through my old paper work and see if I can find the instructions.
Rich
Rich
#6
04-14-2013, 08:19 PM
Fleet Owner
I searched out a article showing in detail how to convert your oil bath filter to a paper filter. Did it right after I purchase my truck a year ago and have had no issues. Original look with a modern filter. I will look through my old paper work and see if I can find the instructions.
Rich
Rich
To answer the original question, IMO the little filters do not flow enough in a single-carb application.
#7
04-15-2013, 10:18 PM
Trending Topics
#8
04-16-2013, 09:02 PM
I searched out a article showing in detail how to convert your oil bath filter to a paper filter. Did it right after I purchase my truck a year ago and have had no issues. Original look with a modern filter. I will look through my old paper work and see if I can find the instructions.
Rich
Rich
https://www.ford-trucks.com/forums/1...cleaner-3.html
#11
04-19-2013, 09:43 PM
Freshman User
Join Date: Dec 2012
Location: Baldwin City
Posts: 27
Likes: 0
Received 0 Likes
on
0 Posts
Oil bath vs paper filter
I didn't necessarily want to get rid of the oil bath, but I really don't have all the necessary facilities to clean the oil bath properly and a paper filter seems easier. Then again, I'm new to this type of thing and maybe misunderstood the proper care for an oil bath. Do I need to be enlightened? Maybe I don't need to soak it in kerosene or solvent every time I change oil or clean it. Is there a step by step for proper changing and care of the oil bath? I am of a generation long after the introduction of paper filters and my googling of oil baths made it sound complicated with extra steps and needed supplies like kerosene, etc. if someone would take the time to educate me differently, I'm open to listening and learning and still have my original oil bath on a shelf in the garage.
#12
04-19-2013, 09:55 PM
#13
04-20-2013, 11:11 AM
If you keep up on it the air filter is easier than the oil filter if you are using the original cannister with no way to drain the bottom. I guess it comes down to original or modified. That is a decision we all make and for different reasons.
#15
04-21-2013, 03:24 PM
Fleet Owner
I ran into this on Joe Abbin's site, www.roadrunnerengineering.com/techtips.html. He's a very knowledgeable guy, a mechanical engineer, and did a lot of research at the last SEMA event. He writes this about the typical K&N-type re-useable air filters:
"There are several air filter systems promising more horsepower by allowing more airflow. Most of these filter elements are of the cotton gauze type, which are oiled to enhance dirt capture. The good news is that the filters do flow more air for the same size as a standard pleated paper filter.
The bad news is that they also flow more dirt. Using a well known manufacturer’s own data for one of these filters vs. the SAE data for a standard pleated paper filter, and calculating the difference in filtering for a 302 cubic in. engine traveling 12000 miles, the difference was over one more pound of dirt ingested by the engine with the high flow filter! This is particularly harmful on tow vehicles which may spend long times at high throttle opening in dusty conditions. There is definitely a trade-off here. You can often maximize airflow by eliminating the filter altogether if engine life is secondary."
If a K&N is that much less efficient, how do you think an oil bath will perform?
The bad news is that they also flow more dirt. Using a well known manufacturer’s own data for one of these filters vs. the SAE data for a standard pleated paper filter, and calculating the difference in filtering for a 302 cubic in. engine traveling 12000 miles, the difference was over one more pound of dirt ingested by the engine with the high flow filter! This is particularly harmful on tow vehicles which may spend long times at high throttle opening in dusty conditions. There is definitely a trade-off here. You can often maximize airflow by eliminating the filter altogether if engine life is secondary."