Engine/Transmission (1998.5 - 2002) Bhaf?

[JMcKee]

New to the forum, great experience so far!



I was wondering what choices were out there for air filters for my 02 2500 5 speed 4x4. So far i am just running a 3 inch strait pipe. I have read previous posts about BHAFs and was wondering what napa offers (and p/ns) and how the installs went. What Clamps or hardware do you need? Do you ditch the stock air box all together? Is a heat shield vital?



thanks

joe

 

[SHobbs]

B. H. A. f is pretty straight forward. Remove the stock air box and lay the filter on the fender well. The intake hose on the inlet of the turbo fits the opening of the filter. Cummins p# AH19037 and Napa I believe is p# 2790. Most B. H. A. F users are also using a filter cover from Outerwears. The cover helps to keep the filter clean and is water repellent in case some water finds its way to it. As far as a heat shield some do and some don't. I currently do not have one but, I think it is a good idea to have.

 

[RAMN4EVR]

I run a BHAF,take a peek at my pic gallery, bought a used heat sheild. well worth the price, unless you make your own. Somewhere on here there's a layout. Here's where you can pick one up.



http://www.cumminsdatabase.com/marketplace.php?merchant=listing&id=45



Welcome aboard,

Gary

 

[Regcabguy]

Stock box deja vu.

I've returned to the stock box with an Amsoil filter. It flows great with my horsepower application and on Smarty#9. No flow problems and sucks cool air from the fender well. Much quieter than the honker.

 

[GBrock]

I'm on the fence between going with the AFE pro 7 or the BHAF. Anyone on here have advice which way I should go?



I know the BHAF will have to be replaced and the AFE is lifetime... but the Mx on the AFE is something to consider as well.



Is one better than the other?

 

[Jetpilot]

BHAF shows a HP decrease on the dyno... . I have seen this as well as there was an article in the TDR magazines that had identical results.

 

[Regcabguy]

I'm on the fence between going with the AFE pro 7 or the BHAF. Anyone on here have advice which way I should go?



I know the BHAF will have to be replaced and the AFE is lifetime... but the Mx on the AFE is something to consider as well.



Is one better than the other?

I had the AFE Stage 1 before going the BHAF route only to return to stock with free flowing element. The AFE is a quality product and the only one I've found that had a seat of the pants improvement. Only problem was the turbo whine set off every dog in the neighborhood. My hearing's shot and conversations were tough between the wife and me. Maybe that was a good thing.

 

[Regcabguy]

I'm on the fence between going with the AFE pro 7 or the BHAF. Anyone on here have advice which way I should go?



I know the BHAF will have to be replaced and the AFE is lifetime... but the Mx on the AFE is something to consider as well.



Is one better than the other?

I had the AFE Stage 1 before going the BHAF route only to return to stock with free flowing element. The AFE is a quality product and the only one I've found that had a seat of the pants improvement. Only problem was the turbo whine set off every dog in the neighborhood. My hearing's shot and conversations were tough between the wife and me. Maybe that was a good thing.

 

[Boondocker]

So I just came in from removing my BHAF and returning my stock air box and filter. Why, you ask?



I had a long talk this weekend at May Madness with a member who makes "cold air boxes" for 3rd gens. It's really a ducted intake to the stock box, but that's another story. The point is, he did a bunch of reasonably scientific testing with all kinds of intake arrangements. His testing involved measuring flow in a controlled environment and driving his truck up a 4% grade while measuring tempuratures - outside, in the engine bay, and after the filter.



Open element filters that are shielded (not fully enclosed) were 40-50 degrees hotter across the operating range than a stock box. His product was a little better than stock (so far only for 3rd gens too).



We all know that denser air makes for better combustion = more power, lower EGT, and less smoke. Cooler air is denser. I think that many of us, speaking for myself, have been fooled, by the "flows more air" claims of after market intake purveyors.



In our engines, air is drawn to meet the fueling demand, not the other way around. Insufficient air = black smoke. Black smoke = potential power that went to the atmosphere instead of the tires. A bigger turbo can compress more air into the intake, thus providing enough air to more completely combust the fuel, making power, not smoke.



Here is what his testing pointed out, and I'm paraphrasing here, so the numbers are hypothetical. The engine (not overfueled with jumbo injectors and fueling box) needs 1000 cfm at max load. The stock air filter/box will flow 1100 cfm. So there's a 100 cfm potential left unused. A high-flow airfilter maybe can flow 1500 cfm. Slo there's a 500 cfm potential left unused. Of course that's not every angle on the story. The thing that got me was the hot air being sucked in by the shielded but unenclosed filters.



The stock air box, drawing air from behind the fender, has to be cooler. I knew this when I put the BHAF on, but it looks cool. Unfortunately, it's warmer. If I don't pull the filter minder down, then I know I have sufficient flow. If it's a decible quieter, my wife and son will appreciate that. So we'll see.



Neil