M813 series intake mods

[NEIOWA]

Assuming goal is to improve the breathing (performance +) of an M813 series and to eliminate the fender mounted air filter assembly, what advice or parts might be recommended.

 

[Westech]

umm i just put a 5 ton air filter asm on my deuce. works grate why take it off? its a large filter

 

[DrFoster]

I think we talked about this before, but I'll repost, since I hate the search flamers!

The filter flows 13-1400 cfm. The engine only needed like (I can't remember exactly, I did the math 'tho) something like 300-800 cfm at full bore depending on the boost. I guess that would mean that you don't really need a better flowing filter it is just that big to be able to pick up a lot of filtered media without clogging.

 

[NEIOWA]

Is there a filter assembly (K&N etc) that will fit the existing M813 intake system and fit under the hood (trash the fender mounted unit)?

 

[DrFoster]

If you're gonna go street only, hit a truck salvage yard and pick up a filter housing there. Wallew has a lline on the proper filter to buy from k&n.

The under hood housings will net a slightly higher intake temp (decreased power levels), but will be a tad quiter because they muffle the intake noise a bit more. I think it would end up being an expense that would not have many good results, except for a blank fender... You could plumb the intake to the old fender hole for cool air to fix the intake temp, I don't know...

There are serious problems with k&n filters. They are designed for racing and flowing at the max cfm rate, and that is something the deuce motor will never do to this filter. The media actually filters LESS until it gets dirty, then it clogs faster than a paper filter because of the oiled fabric. In the mean time, you've sucked an unusualy large amount of dust into the motor, until it clogs and begins filtering out smaller particles.

There's been a heated discussion with this in the past too. The simple facts for a k&n was that:

1. It did flow more when new, with the trade off being less filtering ability
2. The engine would not see any gains; both filters flow more than the engine can suck
3. It flows equal or less when dirty compared to a paper filter
4. Cost is almost identical, however nets you less protection, and same flow rates
5. It's best used on a vehicle that has an insufficient filter FLOW but not for times when you'll need filtering ability.

Now I've opened the K&N vs. paper war again. I'm only putting facts here, so you guys don't start up!

If you don't mind, let me ask - Why? I'm not trying to be an asshole, but sometimes when I re-read these posts, they look that way, so let me get that out of the way.

 

[73m819]

on an 800 series , where is the room under the hood for a big a$$ filter

 

[DrFoster]

Just use an AEM Short Ram Intake with a K&N filter... lol

 

[chief76433]

The reason I was wanting to change the filter was because of the size.I don't want it to get torn off in the brush.I also like the look of a clean fender.For now I guess it will ride on the fender.Thanks for the info.

 

[Dieselsmoke]

.I don't want it to get torn off in the brush.

Uhm..I think they are plenty stout for that unless you consider 100 year oak trees as brush

 

[chief76433]

We don't have any 100 year old oak trees but we have some pretty good size mesquite trees.I hope the tires are as tough as the rest of the truck.Mesquites have big thorns.

 

[DrFoster]

Tree hugger link time, hahaha

http://www.treadlightly.org/

Don't run over the trees or these guys will get you!