Just sitting at work reading about gears, trannies and the like. Had a question I couldn't answer with the search function. Well assume a Riv, stock converter and motor, and a tranny to make this possible. If you're out cruising, What is the lowest RPM you would want to be cruising at in the highest gear. For instance lets say I had a 2.93 rear end with a 200r4 in OD I could be turning about 1400rpm, that strikes me as a wee bit low. I guess what I'm trying to figure out, where is the ideal rpm range for cruising speed? I've got nothing planned, just curious.
What is your definition of cruise speed? My LeSabre (at 40mph) would cruise at 1500 RPM on the city streets and it did fine..
I'm still trying to figure out what I'm trying to say... Okay, what is the lowest you can go in reference to RPM? Culd you cruise at 40 MPH at say 800 RPM? I think I'm trying to ask multiple questions:Where does the coverter lock in? Where does the Turbo 400 shift at in respect to RPM in normal city driving conditions? when does the 455 start making good useable power? If I put a 200r4 could I cruise at 70 mph on the highway for 5 hours at 1600? I think that might cover it.
Right, but how does the converter fit into all of this? As far as I can tell it must somehow, but I don't know enough to know how it fits in.
It is COMPLETELY dependent on engine torque at any given RPM... for example, a big Peterbilt or Cat diesel will cruise at 1000 RPM at 60 MPH with an 80000 lb load. A very powerful 455, geared crazily, might go 60 at 1000 RPM too-- maybe more-- but it will die at less than 400 RPM or so, so there is the limitation... Frank
