'95 4700LPX T444E
My '95 4700LPX T444E is currently set to 175 HP from the factory. It drives a 4 speed Allison auto tranny. The engine turns 2,300RPM at 55 MPH and bounces off the 2,700RPM rev limiter to go about 63-68MPH depending upon if I'm pulling a load or not. It is an old ChemLawn truck that I have a 12 foot dump on and pull a tri-axle trailer with. I like the truck and it's a work horse but it's just too damn gutless for pulling a trailer or hauling any weight up any grade.
What can I do to this thing to get more power? How big are the injectors? Are they going to be the limiting factor? Can I just add propane injection to get another 100-150 HP to climb the hills when towing a trailer? I wish I had a two speed rear end in this thing. Is turning 2,700 RPM hurting the engine at all? Can I turn it faster to go 75MPH empty or should I look into changing gears or putting a 2 speed rear end in it? Will the tranny hold up if I let it run through the gears before I put the coals to it? It's in 4th gear by 35 MPH anyways. It accelerates to 35-40MPH pretty good already it's just getting to 60 MPH or climbing a slight grade that is painfull.
What can you guys tell me here?
Thanks in advance,
Last edited by BlackStack; 01-23-2010 at 11:19 AM.