1990 stock w250 timming bumped pyro after turbo will go to 1250 on the hills hauling my travel trailer it weighs 5100lbs runs great as long as i haul in 4th gear try and haul it 60mgh in 5th and any kind if a hill and it warms up. Ithas 33 12.5 16.5 tires is this throwing my ratio off . What parts do I need to be looking for to make this thing haul I need more power achev 350 gas will out haul it on the 4 lane please tell me what I need

 

My thought at least, is a compressor upgrade or a bigger turbo, an intercooler would be nice as well. I assume you have 3.54's. YOu definately don't want to run 1250 AFTER the turbo for long! Maybe a water meth injection would be nice for the hills as well.

I'm sure more experience folks will chime in.

 

Post turbo temperature limit is 900 degrees!!!!!! Pre-turbo is 1270 continuous and 1300 short duration. To much heat, in my experience, travels down the turbo shaft and cooks the oil in the bushing next to the exhaust turbine. This of course causes premature bushing failure which could lead to turbo failure. Also aluminum pistons can start to deform above 1300 degrees causing the clearance between the cylinder walls to go away or rings to stick. This usually followed by large amounts of blue smoke out the tail pipe or stack. Piston failure usually occurs after ignoring the egt gauge on a long pull.

 

What are you running for intake and exhaust?

How is the pump set up?

A 3200 RPM spring will let you run faster in 4th.

60 in 5th is kinda slow with big tires.

 

Holes drilled in air box straight pipe exhaust truck won,t haul it less than 900 degrees anyware

 

Check the exhaust for restriction where it goes over the axle.

And don't be afraid to gear down and wind it up. It's a diesel, it has a governer and you will not blow it up by over-revving it.

 

Whats a good turbo to put on 1990 non i/c and wheres the best deal got to get more air

 

Depends on your plans for the truck. Need more info.

 

With 33" tires, you dont need to be in 5th at only 60mph anyway, unless you have 4.10s, then that's the sweet spot. Drop it into 4th and let her wind up.

Take the slack out of your throttle rod adjuster, and see if that helps.

But, if you cant keep up with a gasser (big or small block) with a nonIC truck, something is wrong somewhere. How is your lift pump output? Fuel filter age/miles? How many miles on the truck? Have the injectors been out in recent memory? All that can affect EGTs and towing.

 

405.ooo km on truck 2000 on fuel fillter have a gooseneck livestock trailer and goes to 900 post turbo at 65mph this edit travel trailer seems to haul like a cat by the tail. seems like there is a spot where the thing just seems to take off whem empty but its mashed right to the floor