Intake conversion

[pausma]

Is it possible to fit an afe stage1 air filter from an '01 2500 onto a non-intercooled '91 D350? Otherwise, what is the best setup for an aftermarket intake system for a non-intercooled '91 D350?

 

[NIsaacs]

The original intake/filter system on the 1st. gen. is the best of all the Dodges. You can't improve it.



Nick

 

[DVolk]

If you want bigger go get a BHAF filter

 

[cerberusiam]

The easiest way is add a BHAF. However, an AFE should be adaptable with some modifications. Might need a custom TQ tube for routing but it should work right behind the headlight.



As long as the AFE is a dry filter. If its an oiled one toss it.

 

[JLEONARD]

If you have non intercooled, find an intake horn from a Freightliner in a junk yard. Low profile, full 3 inch. Then make up the piping from the turbo to the big intake horn with 3 inch pipe (and a little welding). BIG , BIG improvement, especially if you ditch the "baby H1C" and get a real H1C.

 

[HHhuntitall]

No larger than the factory turbo is, the factory filter is plenty large enough to feed it..... If you up the turbo size, BHAF might be an option, but you're only going to pick up about 25% with that over the stock filter. It's a pretty good sized filter as it is... .

 

[pausma]

Is there any way to improve the tubing from the stock air filter to the turbo inlet?

 

[cerberusiam]

Smoother tube with slighter bends. There are several places that make new tubes from a templay and pair them with new solcone hoses to accomplish that.



Trying to determine if you actually see a benefit is the tricky part. Unless your pushing the envelope on power quantifiable results are tough to get, and likely will not have a bearing unless your at WOT.



The 3rd gens will make 500 HP with\without a filter using 2 90 degree angles and ribbed bellows in the intake tract. You simply cannot find a measurable difference between a modified sotck intake and a $400 aftermarket at those levels.



Are you looking for more power, better performance, etc? Simply removing the stock air box and adding an AH19037 air filter to the end of the stock tube will give you more flow than the engine is going to need to somewhere past 40 psi and 500 HP.



If you have an AFE dry filter setup a couple silicone hoses and 4" exhaust pipe will solve the problem. All depends on where you want to spend your time and $$.

 

[RSchwarzli]

One can also look into an ASA Intakes unit. I have run mine for 2 years and am happy with it. Filter wise that is another question on its own. Does use a AFE. I do not have any numbers at this point on it if is better or worse flow than stock.

 

[JLEONARD]

Are you looking for more power, better performance, etc? Simply removing the stock air box and adding an AH19037 air filter to the end of the stock tube will give you more flow than the engine is going to need to somewhere past 40 psi and 500 HP.

If he is stock non I/C then the intake tube from the turbo is tiny. He will need to fab a new one. Easy to do, I have seen several different looking ones.

Anything will be an improvement to get more air volume in.

 

[cerberusiam]

If he is stock non I/C then the intake tube from the turbo is tiny. He will need to fab a new one. Easy to do, I have seen several different looking ones.

Anything will be an improvement to get more air volume in.

Sure, thats a given but still restricted to what he wants do with the truck and how far he wants to tweak it.



He was originally asking about the mounting an AFE in there so I just tabled the rest of the intake tract for a later discussion.

 

[pausma]

I think I will stick with the original filter since it is larger in size. I will perhaps look into the fabrication of an intake tube but since I am at approximately only 210-250 hp it is does appear that the intake system is creating any type of restraint on my current setup.

 

[HHhuntitall]

Donaldson or Walker exhaust tubing, combined with some 4" intercooler boot, and you can make a decent, less restrictive, intake boot. Paint is needed, IMO..... Donaldson and Walker makes a lot of 4" pieces with 90, 67,60, 45, 30* bends. I think two 45* bends, one just off the turbo, and one just off the filter, with a short piece between, make a great setup. Donaldson Part #P207353 from TruckPro. But too much intercooler boot, and you can get some collapsing issues, but not enough, and you can pull the boots off or pull the filter box off the fender from engine torque... . I've had to make some to replace some factory boots that were eaten up by time and rats... . The Gates 4" Durion Silicone Hose is part #24864 at Orielly's..... I "think" the Walker 45* 4" exhaust tubing part number at Orielly's is #41430 or 41475, aluminized. Both make chrome pieces, too, if you want to go that route... . I don't think Orielly's can get those... . They look pretty sharp, sometimes... . 4" hose clamps are available at just about any home improvement or hardware store, such as Home Depot, or Lowe's (lowering your standard... . ), you'll probably need a size 64 or larger..... Orielly part number is MHC MP5064... .



I'll try to get a pic of one I've built. I think a truck is coming in Monday or Tuesday for a transmission service that's got one on it.