Engine/Transmission (1994 - 1998) Bhaf or stock filter housing comparison

[McCRam]

In the last TDR, I read the article about different types of filter intakes and the importance of getting cold air to the engine. Today I did back to back comparison between my Eaau 4510 filter, mounted bhaf style, and a stock filter housing.

I was pulling my 32' Laredo fifth wheel which is not loaded yet and should weigh in around 9000 lbs. With the bhaf my egts would hit 1200 by the time the boost hit 25psi. With the factory housing I only hit 1000 at 35 psi. I took these readings on the same hills going 70 mph.

I am curious to find if anyone has found similiar or different findings? I think I am going to get a new filter, the factory filter is very dirty, and keep good track of mileage and egt readings. So far I have not seen any difference in mileage. I keep good records on very tank. So has anyone else tried different filter housings in similiar real world conditions

 

[joshs93ctd]

when i had my 02 6speed daully i had put a BHAF and made a heat sheild that the filter would fit in and cut a hole for my tube to fit into it took alot of time to git it to fit tight with the hood down cause i ran a pice of rubber that came off the cowl of our trucks on the top side to seal out the heat of the turbo but it droped my egts down alot plus cooler air = more power i pulled alot with it. plus i loved the sound of the turbo just an idea for you i wish i had took pics of it but that was 8 trucks ago!

 

[McCRam]

I have a heat shield for my bhaf as well. I have used the large paper filter as well as the 4510. When I switched to the bhaf, I believed I noticed a reduction in egt as well. But now when I use both in the same day same load and same conditions, the stock filter housing gives me cooler egts.

I want to get a temp gauge that I can read intake air temps and see the reaction between egts and underhood temps

 

[VanOverbeke]

I have a BHAF set up on the 2004 that I just switched out today with the stock air box that I finished putting the 4" sewer pipe mod on the bottom of. I will do a tow fuel milage check next week with the stock box and the new mod. I did not have a heat sheild for the BHAF and I got an average hand calculated 11. 5mpg towing 12,500lbs from Alaska to Minnesota (3,250 miles)two weeks ago. I am going from MN to New Mexico next week with the same load, so I will see if there is a significant differance. I know it is not a 12V, but the numbers should prove to be interesting all the same.



Bryce

 

[The patriot]

I have a BHAF set up on the 2004 that I just switched out today with the stock air box that I finished putting the 4" sewer pipe mod on the bottom of. I will do a tow fuel milage check next week with the stock box and the new mod. I did not have a heat sheild for the BHAF and I got an average hand calculated 11. 5mpg towing 12,500lbs from Alaska to Minnesota (3,250 miles)two weeks ago. I am going from MN to New Mexico next week with the same load, so I will see if there is a significant differance. I know it is not a 12V, but the numbers should prove to be interesting all the same.



Bryce

You'll likley do better just beacuse of the lack of mountains.

 

[VanOverbeke]

I had two full tanks without mountains on the way down and the best I got was 13. 56 (hand). That is the number I am going to try and beat. My final stop is at 4200ft elevation in NM. I have never been that direction, so I am not sure if there will be a small pass or not to get up to that elevation. We will see.

 

[VanOverbeke]

The results of my trip with the stock box compared to the BHAF are in. The trip was 1000 miles almost exactly. I had three tanks of fuel and averaged 10. 58 (hand). I had some pretty strong headwinds for two tanks. I was traveling early in the week and was headed right into thunderstorms and tornado warnings. The winds were pushing the storms north and I was headed south. I was hoping for a closer comparison, but the wind did not allow. It was surprising though because I got my worst tank of fuel on this leg of the trip also. I am going to do some in town, without a load comparisons before I make my final decision.



Bryce

 

[tgrfan2]

In the last TDR, I read the article about different types of filter intakes and the importance of getting cold air to the engine. Today I did back to back comparison between my Eaau 4510 filter, mounted bhaf style, and a stock filter housing.

I was pulling my 32' Laredo fifth wheel which is not loaded yet and should weigh in around 9000 lbs. With the bhaf my egts would hit 1200 by the time the boost hit 25psi. With the factory housing I only hit 1000 at 35 psi. I took these readings on the same hills going 70 mph.

I am curious to find if anyone has found similiar or different findings? I think I am going to get a new filter, the factory filter is very dirty, and keep good track of mileage and egt readings. So far I have not seen any difference in mileage. I keep good records on very tank. So has anyone else tried different filter housings in similiar real world conditions

When my stock filter was due for replacement, I installed a BHAF instead. I don't have a heat shield.

I had my wife log a series of hills on a 150+ mile trip pulling our 13. 5K# fiver before and after. The BHAF gave me 50-75 degrees less EGT at 24-26# boost than the stock dirty but not clogged OE filter.

The route has always varied MPG by . 5 to 1. 0 mpg so I never got a "feel" for possible mileage improvements.