Power Driven Diesel Air Filter Restrictive?

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MCTNKR

Member
31
0
6
Location
Fountain Hills, AZ
Based on some information I saw on a YouTube video about the benefits of installing the "Dust Bowl" PDD air filter, I decided to try it out. Completely stock 1971 M35A2. IP is still sealed with the lead tags. After installing I went for a spin on my usual route. I immediately noticed on the upgrade section of my route that my full throttle EGT went from the usual 900 degrees to 1100 degrees and that instead of 5 PSI of boost I was reading none. Truck still seemed to perform the same but I am not happy with these numbers. After re-installing the stock air filter my readings were back to normal. I am wondering if this filter is very restrictive and making the truck run rich?

I contacted the vendor for an answer and never received a response. Wondering if anyone else has had a similar experience?
 

Fatalid

Member
Steel Soldiers Supporter
119
5
18
Location
Mesa, AZ
I don’t have any experience with that particular filter, but based on those numbers, I would come to the same conclusion - too restrictive. A less restrictive filter will lead to lower egt numbers.


Sent from my iPhone using Tapatalk
 

Jeepsinker

Well-known member
5,188
28
48
Location
Dry Creek, Louisiana
You might have seen better results if you skeletonized or removed the step in the sump that blocks the front of the filter. Quite a bit of surface area there.

A stock 5.9L Cummins breathes more air than the multifuel does, so...
 

Jeepsinker

Well-known member
5,188
28
48
Location
Dry Creek, Louisiana
Just an idea; try it again but leave the bottom off. Just don't put the can on. The filter connects to the top plate, so it isn't needed. That'll tell you if it was the filter itself causing a restriction, or flow interference with the filter from part of the box.
 
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