bubbabud

The engine and CAC cooling system on all late model F 150s is way over engineered Ford even installed Shutter's on the radiator and CAC partially to prevent over cooling. I never had a heat problem either of my EB trucks and I have worked the crap out of them both in AZ desert and the San Rafeal and San Juan mts of Utah and Colorado.

Boulevard

The shutters are for for fuel efficiency and have nothing to do with over or under cooling.

Any one who know compressors will tell you that ALL compressors discharge hot air, ALL compressors. The harder you work the compressor, the more air you get, the more heat you get. To combat the problem they install after coolers in order to cool the air but the after coolers have their limits. More feed from the compressor means less time for the combustion air to cool in the after cooler, less cooling air (thin air from high altitude) across the after cooler means less cooling of the combustion air while it is in the after cooler. Hotter compressor discharge air combined with less cooling of the combustion air adds up to a combustion air charge that is hot and contains less oxygen. That means less power. If the combustion air charge is hot enough and continues that way for long enough than it may result in excessive combustion temps and overheating of the engine. This is what happens to turbocharged engines.

bubbabud

Boulavard you win. You obviously have much more knowledge about turbo charged engines than I will ever have. I have only been using, servicing, and driving them both in heavy duty trucks, light duty trucks and high performance high altitude piston aircraft for more 50 years. also have and still do own Turbo F150. But I will buckle down and study real hard. Maybe become 1/2 as knowledgeable as you.Oh one quick question why did Ford block off part of the CAC on early ECOs to prevent over cooling and condensation ingestion?

HacksawMark

Wow, lots of testy-tosterone flowing in this thread. Very entertaining.......

N3UP

And that's why they call it the EGOBoost........

There is no replacement for DISplacement.

Boulevard

Funny huh, 50+ years and you still cannot tell me how a turbocharger losses power at altitude although I did forget to mention that at altitude there is less air to compress so there is a smaller combustion charge which also contributes to less power. I though an expert like you would have picked up on that.

Everything I said can be backed up with compressor manuals and heat and thermodynamics manuals and all you can do is get pissy.

You claim to be this and you claim to be that but you obviously cannot back that up in conversation. I make no claims as to who I am so yeah, you may be a mechanic with 50+ years but I may very well be a nuclear scientist....

5.0GN tow

No not at highway speeds the tow haul holds gears longer on acceleration, but at highway speed the engine and tranny programs favor boost and high gears over downshift for RPM.

Now as far as over cooling being the reason for shutters, nope, fuel efficiency by reducing drag. Second the block off of the CAC was to prevent it from ingesting condensation not sure I ever heard that it was over cooled. Define work the crap out of, because the threads that relate to overheated ecos have several things in common, hot weather, very heavy towed loads, steep grades and low rpm/high boost conditions. Not every truck sees this kind of work, mine does. My 5.0 sees the loads, the heat, the steep grades, but obviously no boost and it revs nicely. It never overheats despite being very heavily worked.

bubbabud

Dont need a manual and just for your info turbo,s dont loose power at higher elevation. As the air thins the turbo,s spin faster with the same driving force just like when you restrict the suction side [lower the air pressure] on a vacuum cleaner the motor speeds up to compensate for the reduced pressure even tho the voltage supplied remains the same.
Definition of work the crap out of as mentioned towing 5 to 7 thousand lbs {Car hauler} from the desert west of Phoenix to the mountains of central Utah and Colorado.[Jeep rubicon and gear]
Shutters if you read my other post on this thread you will note I said PARTIALLY To control temps and it was over cooling that caused condensation to form in excess in the first place. Also note in earlier post Tow haul AND lock out 6th gear. Oh and the reason Ford installed a 2nd set of shutters on the CAC was to control air temperature.

tsigwing

I believe bubba is talking about the "fix" for condensation for the 11-14 trucks, where they partially blocked of the CAC, not the shutters on the 15+ for quick heating and aerodynamics. They did move the license plate back to the center of the truck though on the newer trucks though, wonder why...

acdii

SMH. So many experts, so little time......