[66Submarine]

Originally Posted by ky-donzi

Are big over the road trucks going back to gas burners because of the increased hp numbers of modern engines?

One. More. Time.

OTR trucks use diesel engines because they burn less fuel and run longer between overhauls compared to gasoline engines (at least generally). Giant gasoline engines had no problem pulling with NA diesels, but they consumed ungodly amounts of fuel and required more maintenance. Combine that with the rise of the turbocharger (what ACTUALLY makes the "diesel" power), and there was no reason to continue with giant gasoline engines. This isn't that hard of a concept to grasp if you know pretty much anything.

A very popular old-tyme diesel was the 220 Cummins; 743CID, 220HP @ something like 2,100RPM, and 600ftlbs @ 1,600RPM from what I can dig up.

Now, consider the 702CID GMC V12; 250HP @ 2,400RPM, and 585ftlbs @ 1,600RPM (net ratings--not sure about the Cummins).

So the torque is essentially the same, and HP is better. Both will be run wide-open, so the giant gas burner will pull better than the diesel will. It will also consume an ungodly amount of fuel doing so and not run as long, so the diesel makes more sense. Get it now?

One more quick note again; 292 is 153HP @ 3,600RPM, and 4BT is 105HP @ 2,300RPM; both make pretty much the same amount of torque.

So, I am going to repaint the tach so 3,600RPM reads as 2,300RPM, and I will run a 1.56:1 underdrive at the crank (or gear it deeper). Now at "2,300RPM" the 292 still is 50HP stronger, and I picked up over 140ftlbs or torque over "stock"/4BT; now making 400ftlbs. Wow, that was easy!

Torque is not power; just adding a 2:1 reduction at some point doubles torque. If that made trucks go, we'd all be set! But it doesn't in the real world. Why can't you guys do math? Is it against your religion or something?

Originally Posted by 66LSx

I think most semi's are going back to carb'd 2-brl 292's....

Free $100 to the first person to reply to me and disagree/prove me wrong using actual facts instead of myth and/or lamebrained attempts at being witty!

BTW, the 292 was a 1bbl carb deal, genius.

Here's a list of complete engines I have sitting around (off the top of my head), since I obviously think only a 292 is suitable for locomotion:

230
250 x 2 + parts
292 x 2
283
305 (I think a few?)
307
327
350's (several)
400
6.0LSx

Yeah, I obviously think nothing but a 292 exists. Come up with some new insults. (Or maybe even actually reply to what I'm saying for a change?)

BTW, here's another picture of that "12V" head; guess being left out in the rain made it generate some extra valves.

I guess I know how the guy felt that tried telling people the Earth wasn't flat!