im talking heavy loads. not a small trailer or boat. but tractor for example. you see all these trucks hauling farm equipment. close to 20-30k lbs. almost semi truck status. i could be wrong, but trying to tow loads like that with gas engine (not specifically an f150) with turbos i would think the heat buildup would be insane going up large grades. something a diesel truck would be more likely be towing, but they are a different engine. however i think if a diesel truck wasnt the vehicle, a smaller engine with turbo wouldnt be a good option, but rather a larger v8 engine with the power and torque thats available without being in the boost band all the time. like i said, i could be wrong, i havent had a turbo since 06.
huh? You don’t use a gas fed ICE to
Power a truck designed to pull 30k lbs for the same reason you don’t hit off the tee w/ a damn putter- it’s the wrong tool for the job!!
And gas V8s can be setup to run cool, but even n/a AL block V8s are plenty susceptible to heat soak issues
diesels in a nutshell will be more efficient than a gas engine- they can & do run higher compression, while they’ll have considerably higher temps INSIDE the combustion chamber, one of the reasons they’re more efficient than a comparable gas engine is that that additional thermal energy is scavenged & utilizes the additional heat for mechanical work- they run significantly cooler OUTSIDE the combustion chamber as a result, why the exhaust is much cooler in a diesel
Diesel engines tend to have stronger forged iron blocks (and we see even modern gas V8 engines still employ FE block for the same reason if they’re going to be under heavy loads regularly- ie: 7.3 “godzilla”- but that adds weight too, & loses payload/towing/fuel efficiency as a result (in a gas engine that is)
the turbos on a diesel are neither spooling as often or as fast as typical gas turbo vehicle & they also benefit from the cooler running characteristic of a Diesel engine (what drives those turbos btw?)
Also most twin turbo setups are designed so that one turbo handles the power down low & the other @ higher revs splitting duties, adding efficiency & basically eliminating turbo lag
you could make a giant N/A engine capable of producing turbo diesel power w/o FI....but it’d be laughably inefficient, a struggle to keep cool in its own right due to sheer size, & very expensive to produce. In order to get that kinda power out of a N/A V8 to make 400-500hp & 1000 ft/lbs reliably would need a lot of billet/forged internals. A heavy as hell rotating assembly. Probably need to run methanol today keep it from knocking/cool
hell in order to have a gas engine make that kinda power reliably w/o FI & w/o an FE block you’d probably need a billet aluminum block & that cost per unit would be insane.
