9+ MPG Class 8 5 Axel Trucks with Trailers

I guess my point was not so much a rock thru it as it literally holding up getting rocks and mud thrown at it from the steer tire when on gravel/dirt roads, especially after a rain when it is especially muddy. On highway, it would probably be fine. But, my truck does not do only hard surface each week. Even the metal tubing in the pictures looks like it would come apart frequently when subjected to more than normal highway debris. Maybe a thick PVC piping, glued elbows would be an option in rougher conditions.

 

I can see a lot of filter changes in Dice's future with where that intake it...

Its a good idea but it will pick up all the road grime and dust.

 

Most every ram air scoop I have ever seen has louvers in the back to get the water bugs, dirt out of the air stream.
Freightliner FLD120 with the air inlet screen in front of the windshield uses the preasure in front of the windshield to push the air into the air box, Just like Nascar does. It does work, Then someone leaves out the Flactuator valve and it just blows cool air on top of the transmission.
Putting a lot of ducting to get boost when driving 60 MPH does not work when the restriction is to high when you hit a hill and need the maximum power and Boost.
The old Cab overs had the big scoop on top of the radiator opening that fed the air filters, especially if they ran the Farr air filter system.
Stemco use to have a chart for piping and every angle has a restriction noted if feet of straight pipe a 90 long tangent elbow was 20 ft as was a 45 degree shot tangent, flex pipe was 5 ft per ft in exhaust systems.
My personal favorite is guys that put on rain caps backwards, restricting the exhaust. They go sideways.
I have seen lots of guys do modifications to get more air into the system. most make it worse, test them all with a good vacuum gauge. You never know you may make the breakthrough that works.

 

After the air goes thru the turbo and CAC does the outside air temp coming into the filter really make that big of a differance? I would think that the air temp plays a bigger part on the CAC than the intake.

 

Dice, if I'm not mistaken, you only Blue'd the bearings on the bottom of your engine. Have you considered doing the cam and cylinders as well?

Also, there was a passing mention in another thread about running a 3 axle tractor with only 1 drive axle hooked up, ie 6X2. Seems to me like a good idea for fuel efficiency considerations. Has anyone here tried it? Any downsides?

 

Every large carrier buys fuel on contract from the truck stops chains and wholesalers... the carriers bet that fuel will get more expensive and bid accordingly. The vendors do the opposite... you win some and you lose some.

They can buy, in quantity, for 30-40 cents per gallon (or more) lower than the pump price.