Air filter
My isl 425 in my Newmar is not getting enough air, the air gauge back nx to engine almost closes up after driving 100 miles with a new air filter in it an I'm just getting 6.2 mpg I'm thinking about d...
Forum Discussion
I can understand and sympathize. I have an ISC 8.3 in mine and the gage would do the same thing. It drove me nuts. So, couple years ago I researched and discovered that the next size up filter was easily adapted to my engine. I did the mod and:
1. the gage stays where it should be with a new filter.
2. I got about 1.5 mpg increase in mileage
3. I "notice" better pull on hills.
I am a happy camper
The filter is held on with snap straps. There are standard straps available for the larger diameter filter. Then it's just a matter of making the ends work. Before I did this, I calculated the air flow needed for my engine and found that the stock filter had sufficient, but it still made the gage kick up. With diesel engines, more air is always better.
1. the gage stays where it should be with a new filter.
2. I got about 1.5 mpg increase in mileage
3. I "notice" better pull on hills.
I am a happy camper
The filter is held on with snap straps. There are standard straps available for the larger diameter filter. Then it's just a matter of making the ends work. Before I did this, I calculated the air flow needed for my engine and found that the stock filter had sufficient, but it still made the gage kick up. With diesel engines, more air is always better.
