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Author Topic: URGENT Technomadia - Overheated and stranded in SE Montana LOCKED DOWN 4 REVIEW!  (Read 24135 times)
Len Silva
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« Reply #75 on: June 18, 2013, 10:11:31 AM »

The only advice I can offer from a distance is that if you are completely comfortable with the shop doing the work, then go for it;  a new engine or an overhaul of yours.

If you don't have that warm fuzzy feeling, then you might be better off to patch it up and move on.
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technomadia
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« Reply #76 on: June 18, 2013, 03:30:40 PM »

As to change over I would have to look up the serial number to know for sure but most of the DDEC II engines you removed all of the electronics and installed the mui set up, i.e. governor, racks and link rods change injector and on these engines I think you need to pull the flywheel housing and remove the off set keys in the cam gears and install the straight up keys. You could then remove the atec set up form the V730 and install the valve body and modulator from yours. These things have the rts radiator and fan set up and I don't know if you could get that in your bus or not, if you could that would help with cooling. This type of change out could cost what a rebuilt 8V71N could run.  Just something to think about.

This is exactly what we are thinking over now...

We've gotten a price quote on the 8V71 full rebuild and it is actually a bit better than we were anticipating, but the timing would have us still in Billings long enough that we would mess up our existing plans for July in Oregon.  So if we are going to end up taking more time here anyway - why not take this opportunity and repower with a 6V92TA?

I'd love more information about these engines that you know of - feel free to call me at 408-667-9022 or PM or post more info here.

Most of the other bus nuts I've talked to say that the 6V92TA would be a great all around upgrade - more power, much better at altitude, somewhat better fuel economy, more modern engine design, easier to find parts and experienced mechanics, and less susceptible to damage from abuse than an 8V71. Is this all really true?  (At least one bus nut has told me the exact opposite on some of these - bus nuts can never all agree!)

Anyway - our decision right now is coming down to doing a full 8V71 overhaul (ending up with a tuned, tested, painted, and warrantied engine), or doing a repower to a 6V92TA.

Wisdom and advice always appreciated.

  - Chris
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Cherie and Chris / www.technomadia.com
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Utahclaimjumper
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« Reply #77 on: June 18, 2013, 03:39:20 PM »

 The 92TA would be a great choice, altho its more unforgiving to overheating issues. The aluminum heads don't like to be overheated, but then there is no reason for that if the cooling system is maintained.>>>Dan
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Utahclaimjumper 
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« Reply #78 on: June 18, 2013, 03:52:35 PM »

The 92 is not a airplane engine Dan it has no aluminum heads you just wake up from your nap Roll Eyes
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« Reply #79 on: June 18, 2013, 04:30:46 PM »

 I had to re-read what I wrote, my bad, I was typing too fast for the brain.>>>D
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Utahclaimjumper 
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chessie4905
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« Reply #80 on: June 18, 2013, 04:40:00 PM »

  He meant that the aluminum valve covers are less forgiving. Less than what, I wouldn't venture to guess.
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« Reply #81 on: June 18, 2013, 04:44:33 PM »

 I guess I had that one coming huh??>>>D ( I had better take that nap now)
« Last Edit: June 18, 2013, 04:46:09 PM by Utahclaimjumper » Logged

Utahclaimjumper 
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B_K
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« Reply #82 on: June 18, 2013, 04:46:41 PM »

Chris & Cherrie you are wise to look over all options before doing anything.

I have dealt with American Fleet before we have bought an engine from them and a bus from them that they had put an engine in.
Both ran great and had no issues with either one.

I also know several others who have bought multiple engines from them and were happy. (and Mr. Bowen os only 1 of 3-4 of them)

No don't get me wrong I'm not one to argue with Clifford (and I'm not arguing with him), so take his words of wisdom wisely.

Also get with Don Fairchild and see what it'd take to put in one of those 6v92TA's from the RTS in there.

If it were mine and I was going to spend that kinda $ I'd go ahead an putin the DDEC 6V92TA in it and upgrade it from the DDEC II to DDEC IV. (you guys are techies and should have no problems learning and working on the Pro-link type stuff to keep up with it)

Just my 2 cents worth and it needs about $2 added to it to buy a truck stop shot of coffee these days.
Grin  BK  Grin
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wg4t50
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« Reply #83 on: June 18, 2013, 04:59:17 PM »

The small radiator ?  Can it handle the 6V-92 comfy ?
Dave M
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« Reply #84 on: June 18, 2013, 05:04:09 PM »

The radiator is fine Dave just the 92 needs all the fan components redone with pulleys and belts,

I see American Fleet is no longer grinding the crankshafts so the site says that's good took him awhile to figure that out, I wonder if he is still grinding the cams 
« Last Edit: June 18, 2013, 05:11:36 PM by luvrbus » Logged

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azdieselman
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« Reply #85 on: June 18, 2013, 05:15:45 PM »

I know of a road ready GM bus in Phoenix. 6V92 W/automatic. It has been stretched to 38'. It belongs to a friend of mine. He's not able to use it anymore. It has new tires also.
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1980 Mod 10
Van
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« Reply #86 on: June 18, 2013, 05:33:30 PM »

Hey Don, do you still have that Hot Rodded 71? Grin Grin
 Good luck you two, Re-manufactured w/warranty will give you some piece of mind, new is nice also but oh the cost!

 best o luck to ya's
  Van & Cheryl Smiley
« Last Edit: June 18, 2013, 05:37:22 PM by Van » Logged

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« Reply #87 on: June 18, 2013, 06:04:27 PM »

I know of a road ready GM bus in Phoenix. 6V92 W/automatic. It has been stretched to 38'. It belongs to a friend of mine. He's not able to use it anymore. It has new tires also.

Is he running an ad on CL?
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Mike and Lori
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luvrbus
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« Reply #88 on: June 18, 2013, 06:19:41 PM »

It shouldn't be that hard to install series 50 and transmission from a RTS setup in a 4106 and they can be had cheap I saw a RTS with the series 50 and V731 setup the guys was asking 3500 bucks for the whole bus
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azdieselman
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« Reply #89 on: June 18, 2013, 06:23:10 PM »

No, I don't think he's advertised it yet.
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1980 Mod 10
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