Hello, I 'm pretty new to this forum and diesel engines. I've learned a lot scouting the posts here, but not seen my particular question come up. I've scraped a few knuckles with gas engines and understand the big air/big exhaust rational.

It seems not to apply to diesels to a degree. I see some claiming oiled after-market filters are bad for the turbo? How so? Others saying heat is the enemy, but no one offers a air tube that takes in cooler air than the exhaust manifold? Some say that the after market filters actually decrease performance in real world road work on moderately modified diesels What do you guys think? Does it matter?

Because I am coming from a fairly stock set-up and mostly use the truck for work, towing, and occasional weekend 4-wheeling. What ever modifications I make will be with a eye to mileage and moderate performance gains (primarily for towing boats and trailers in mountain country). But buying a power module seems to make more sense than spending 300 on a filter of questionable value. Thoughts? Facts?

 

the oiled filter everyone is talkin about the k&n and most really hate it.. ive personally run the AFE stage 2 but alot are running the S&B

 

I ran a k&n first on my truck and it let some dust through when I had my compounds done they used a s&b oiled filter and my intake pipe was clean inside so I would say get a s&b they work. I was moving a good amount of air with no issues and I know they help.

 

So, the oiled vs non oiled is more preference? I can go with that, Coming from motocross and off-road background the oiled filter over the dry was the first thing I thought about upgrading. vbut if it is going to damage the turbo, I wasn't going that route.

We have a lot of dust out here. But then I read what Geno had on his site and it seemed more air for this particular truck wasn't an issue. up through moderate modifications.

I was getting the impression that without radical injector upgrades (past 65 hp) and upgraded superchargers it would not really make a difference in performance.

Anyone have an opinion?

 

I believe they help not a whole lot but they do help.

 

The primary reason for me buying one is that i dont have to make a trip to the parts store to get an air filter.... and the savings from never having to buy an air filter again... i dont think there is much of a power gain and maybe not even much of a MPG gain.... it just saves on filters... just my honest opinion..

 

its just like gas motors.. the more air in the more air out the more fuel you can through at it... it is a worth while upgrade if your looking into adding more power hope this helps

 

I wouldn't get an oiled filter. I had an oiled K&N on my truck for a while and it never really seemed to work as good as everyone says they do. The intake tube always had dust in it, the filter never seemed to come completely clean, and too much oil and the compressor wheel in the turbo would have some oil on it and too little and it wouldn't filter completely.

 

We prefer the Dry Filters.

Sent from my DROID2

 

Thanks guys!