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Old 07-09-2015, 02:26 PM   #11
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Originally Posted by ilikebass View Post
Not sure if I'm better off leaving it alone, but I'm also not confident that the bus will get through the mountains without a power increase.
Just to clarify: there are no mountains between Ann Arbor and Denver. If you overshoot Denver, you'll notice the nose pointing up, however.
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Old 07-09-2015, 03:31 PM   #12
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Yeah, my 195hp and 643 are "enough" for me to feel confident driving from Fl to Denver when I get the build done.
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Old 07-09-2015, 04:25 PM   #13
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Originally Posted by Polarweasel View Post
Just to clarify: there are no mountains between Ann Arbor and Denver. If you overshoot Denver, you'll notice the nose pointing up, however.
lol

this is true, but we will be spending a few weeks "in" the mountains and possibly out to Tahoe and back during that time
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Old 07-09-2015, 04:31 PM   #14
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lol

this is true, but we will be spending a few weeks "in" the mountains and possibly out to Tahoe and back during that time
Expect slow going. And a lot of heat. I did Tahoe to Boulder, in July, in a car with no AC and no headliner. Stretch your arms up, burn your fingers. Yuck. I guess it was better than mid-winter in a school bus, though.
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Old 07-10-2015, 04:28 AM   #15
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You will end up stranded. You can count on that.

Plain and simple. If you bump the power, you will break it.

There is a reason why all the DT466 that we run at the shop have the 545 are detuned to 190HP.

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Old 07-10-2015, 04:24 PM   #16
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I suppose that "didn't blow up in short but intense intervals in a drag race truck" is different to "sustained use for many hours and miles." Also manufacturing variances can make one unit exceptionally strong and another one weak. Different consequences too in breaking a transmission at an event vs on the highway somewhere.

I don't know which transmission or axle my '91 Bird had behind its 180 or 190 HP 12v 5.9L Cummins, so it's hard to make a clear comparison to your rig.. But I can tell you it was a looooong drive between Salt Lake City and Boise in July with that thing (a few years ago). It ran like a champ so far as heat is concerned; the cooling system managed it well. However, it could muster just 20-30 MPH climbing some of the grades on I-84 in southern Idaho. I was utterly unprepared for the drive overall to be 10-11 hours; I had gone thinking 5-6 hours in a car so maybe 7 in the bus! But if you won't be seeing that kind of usage much, and you can plan for extremely slow going, it might make sense to save the modification money and avoid the mental stress of depending on equipment beyond its rating.
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Old 07-10-2015, 04:41 PM   #17
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If we are talking transmission life and power handling-
A pickup truck weighs a LOT less than a bus.
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Old 07-10-2015, 05:46 PM   #18
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Guy I was talking to on one of my deviantArt bus postings was positively shocked that I my engine was tuned to 190 or so
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Old 07-11-2015, 11:00 AM   #19
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jazty is right on moved there in about 83 it was the same way. Go looking for a job with out of state plates you wont get one. People are stuck on the native to Colorado thing sounds like it still the same way. Don't go there thinking your going to make money your not. I have been gone since 87 never looked back. Rent, property, utilities all high. good luck
I just had to pipe in on this comment....A LOT HAD CHANGED SINCE 1987!!! Being a Coloradan I feel we are overall a very welcoming state.

The comment about the costs of living here...unfortunately all too true, but it's not terrible by any stretch. Sure isn't Tennessee cheap tho!

I can see how that opinion would form if you were driving thru actual city of Denver, which I wouldn't take my bus near, or some of our more snobby and snooty communities of unincorporated Littleton, Cherry creek, highlands ranch (now a dive IMHO). And just stay away from Arvada....trust me

I live in the old city of Littleton, and by job if you wanna park your bus outside for a week feel free! That is until the city comes and gives you a nasty gram.

The mountain communities are awesome, and if you go to Boulder that will be a very welcoming community. Just outside the Denver metro are unincorporated cities along the outskirts, they're your best bet for parking without hassle.

There are a lot of small hippie communities within Denver, I'm sure if they could they'd let you stay, however the houses and streets are so tight together you'd cause a traffic jam simply driving one way!

Hope this helps, we're not all bad, we just can't drive for **** and the low oxygen makes most of us short tempered.

One side note on your cummins too. Probably the 12v with the p7100 pump was arguably one of the most resilient LIGHT DUTY diesels ever made, in fact cummins even listed a 300000 mile service on them which included rolling in new bearings (don't do that). That is unless you have the earlier coal train pump (rotary) which is still good! Being a master tech for the last 13years, I can honestly say the only times that these engines fail catastrophicly is when they're modded, either too much or without proper monitoring such as gauges, or when they're neglected. And honestly, the neglected ones last longer.

When I use to tow my 5th wheel in the mountains I just got use to everyone passing me like jackasses, I just was patient and took my sweet-ass time, and I knew my engine and transmission would love me for it.

Just do simple mods that are healthy for diesels, open up that air intake and that exhaust, those are the 2 major choke points.

Hope to see you AND EastcoastCB here soon!
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Old 07-11-2015, 11:38 AM   #20
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Excellent technical advice on the Cummins. I can't count the people who have pumped their motors up to twice their ratings then bitched about the mpg and reliability as if it were the fault of Cummins.

As Destroymix notes above, a turn or two of the airscrew and better flowing exhaust are the most basic keys to a sweeter and longer running engine. Simple and cheap too.

One more possibility is to add a charge air cooler if the motor doesn't have one. Denser air in = more power out.

If you want more speed...get a bigger engine or cut your weight in half.
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