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Old 01-25-2009, 12:19 PM   #11
Skoolie
 
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Re: Maximizing MPG with a DT360

After you adjust the fuel screw a little, advance the timing a little bit. That's what helps the most. Most of the time it's set at a lazy 13-15*. Going to 16, 17, or even 19(in a lighter bus) will do it. For all the adjustments, look to my web link to the right of the message button.
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Old 02-26-2009, 09:07 PM   #12
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Year: 1994
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Engine: DT360
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Re: Maximizing MPG with a DT360

My DT360/545 powered, 10 window/54 passenger 94' burned 39 gallons of No.1 on the 412 miles from Whitehall, MT to my place in Wyoming holding a steady 65 mph on the flats and 45 mph on the steepest hills which had me passing over the road rigs. That's good enough for me, it's pretty hilly country with plenty of wind.

I'm just happy as hell she runs strong, I drove quite a few buses of different sizes with different drive trains before I decided on the bus I bought. I think it runs as strong as any of them and certainly stronger than most of those that I drove. In fairness though most all of them were 65-77 passenger/11-13 window buses, getting a better power to weight ratio was why I ultimately bought a smaller bus.

I don't think anything has been done to the fuel delivery but my bus maxes out a little shy of 2800 rpm's. As soon as it warms up I'm going to turn up the fuel and see how that goes. I've also got to figure out what to do about the accelerator, it takes two men and a boy to keep it stuck to the floor board and running 65 mph I was switching legs all the way back.

Take care,
Den
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Old 02-27-2009, 02:12 AM   #13
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Engine: dt466 mt643 air ride
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Re: Maximizing MPG with a DT360

Quote:
After you adjust the fuel screw a little, advance the timing a little bit. That's what helps the most. Most of the time it's set at a lazy 13-15*. Going to 16, 17, or even 19(in a lighter bus) will do it. For all the adjustments, look to my web link to the right of the message button.

If you follow Nervrenufhp instructions you can't go wrong. These dt360's are good engines. Simple, easy to work on and can be rebuilt w/o removing them from the frame. if you can keep your weight under 30k, or even better, under 26k, add a transmission cooler and temp gauge, your transmission should last a long time. And its pretty cheap to rebuild. About the same money as a GM 400 trans to rebuild.

The biggest problem that most skoolies with our setup is the rear axle ratio. My first bus with the dta360/at545 combo came with a 5:38 axle ratio. Great if your running around the city picking up school kids, ain't worth a dime on the highway. if you can find a 4:10 or 4:33 axle ratio, reasonably priced, grab it. Just changing that will make all the difference in the world. Plus you will see a major fuel economy increase, if you can resist racing those Stangs and Corvettes.
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Old 02-28-2009, 02:26 AM   #14
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Re: Maximizing MPG with a DT360

Ok my bus has a dt-360 and a eaton 10 speed how do you know if the pump and governer have already been turned up? I have only used my bus for one trip so far and the rpm maxed out at 2700 to 2800 ?????
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Old 02-28-2009, 10:46 AM   #15
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Re: Maximizing MPG with a DT360

A quick way for you to tell, the rpm would go closer to 3k, or even 3100(stock is generally 2700-2850). The gov is the least likely to be messed with. There would also be evidence that the safety wire was cut for removal of the big access plug. To see if it had the fuel messed with, the plug on the pump will have the paint disturbed, and sometimes the factory silicone RTV blob will be in the hole where the allen wrench fits in.
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Old 02-28-2009, 10:03 PM   #16
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Re: Maximizing MPG with a DT360

thanks for the answer. So whats the redline on the rpms? and if I do turn the fuel up I will first put in a pyro meter but whats redline on temp? any recomends on a pyro gage? Thanks
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Old 02-28-2009, 10:37 PM   #17
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Re: Maximizing MPG with a DT360

Quote:
Originally Posted by beltburner
thanks for the answer. So whats the redline on the rpms? and if I do turn the fuel up I will first put in a pyro meter but whats redline on temp? any recomends on a pyro gage? Thanks
Keep rpm below 3200, otherwise the valves may start to float and cause major damage to say the least. Hypermax sells heavier valve springs if you really want to go higher. The DT360,408, and 466 can actually spin to 4500 without flying into pieces. For durability, keep it at 3k or less. Having a pyro is great for any turboed engine, on the 360, as with most others, keep sustained temp at 1300 or less, but you can spike it up to 1500 for about 3 seconds. Most of the time it will only get to 1150 or 1200 on a hard pull, even after the fuel screw is maxed out. As far as brands of gauges, I'd go with what's readily available. Autometer is my first choice, but there's also Isspro, Stewart Warner, VDO, and a couple others.
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Old 03-08-2009, 01:45 PM   #18
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Re: Maximizing MPG with a DT360

Nevrenufhp I am going to turn up the fuel when I am home next week. so after I turn up the fuel all the way do I need to adjust the pre boost wheel ? and if so could you elaborate on that
Thanks
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Old 03-08-2009, 06:11 PM   #19
Skoolie
 
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Re: Maximizing MPG with a DT360

Quote:
Originally Posted by beltburner
Nevrenufhp I am going to turn up the fuel when I am home next week. so after I turn up the fuel all the way do I need to adjust the pre boost wheel ? and if so could you elaborate on that
Thanks
You dont need to adjust the pre-boost if you dont want to. It's like a fine tuning. If left stock, it will stay burning relatively clean(no black poofs of smoke when you hit the pedal).
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Old 08-31-2010, 03:32 PM   #20
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Re: Maximizing MPG with a DT360

now how about pictures and instructions for the ambac100 rotary pump on my 1979 dt466b
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