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Anyone know what sort of airflow you get from the vents in the early metal splash pans fitted to a late 240?
Yes, any idea of the air flow through it though?
Yes, any idea of the air flow through it though?
I can't recall what the late model pan was like.
The dam and splash pans are part of the same system so changing from one to another likely changes the pressure in that location.
IE you don't know...Anyone know what sort of airflow you get from the vents....
The late model pans have ZERO slots and cover the entire area from the cross-member forward, and the full width of the engine bay.
Hope this helps.
I have no idea how much quantifiable difference the old style pans slots would make, but there would be some increase in air pressure aft of the radiator as compared to late model pan. Some people run without the pans and claim no negative cooling consequences.
John
interest was knowing just how much air goes through the early pan into the bay..
I went to an Efan to increase cooling over the mech fan....
If those slits were needed, the engineers would have insisted. Needless to say, the version-1 belly pans would cost more to make.
It could have been cost cutting, it could have been changes to the cooling system, it could have been the airdam changes, it could have been a push to increase efficiency or any number of things which caused the change. An engineer does not get to "insist" on anything in production. They find solutions to issues which are caused by cost but they certainly don't get to dictate what should be done.
Considering how small those vertical slits are, along with that wire-mesh, that would have been turbulent air flowing thru them. I would suspect version-II would provide better flow thru radiator at highway speeds.
No wire mesh on mine. The newer one would have of course increased airflow though the radiator. Didn't the airdam come in at the same time as other aero changes? All the air flow into the bay is turbulent.
I had an electric fan on my previous 1984, and it never had a heating issue with version-II, on hot summer days at highway speeds.
1975 244 US-Federal
Not the pan I have. Mine has slots instead of holes like yours.
All the airflow theories are great, but bunk..... belly pans were to protect the front of the engine from getting snow packed up
My point exactly. A belly pan helps prevent this.1986 Chevelot Caprice - I was "snow plowing" and whole engine compartment filled with snow, and even one belt came off. No belly pan there...
Lots of people claim a lot of silly things. Simply adding a belly pan doesn't get you there. The air dam below the bumper is doing all of the work there. To see any significant benefit, you have to put a belly pan pretty much the length of the car. You are much better off closing up as much of the front openings as possible and removing things that generate drag (blank off most of the grille, make the front air dam as low as possible, remove the wipers and rear view mirrors and so on). Essentially you want to make the exterior of the car as smooth as possible and not allow any air through or under the car. If you look at cars running on the salt flats, they tape up everything to minimize drag.Eco-modelers - They claim better mpg with smoother surfaces underneath.
Yes that is true. It is caused by a low pressure area behind the front windscreen as the air is forced up and over the car. 240s are particularly good at this due to the steep flat winshield angle. You get a nice low pressure dead spot beside the driver/passenger door. On newer cars, this is less true to better aerodynamics.Air Flow Dynamics - I crack the driver's side window down at highway speeds, and cigarette smoke goes out the window...in fact, one can flip the ashes into air, and they get SUCKED out.
Lots of people claim a lot of silly things.