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Engine Discussion of preventative/corrective maintenance and other technical issues regarding your coach's engine.

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  #11  
Old 1 Week Ago
badandy badandy is online now
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I think I can exercise discretion for a short period.
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  #12  
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But, but, but... your drivetrain is at the top end of it's HP rating. The MT654CR is a 300 HP tranny.... The diff is also a little small for much more torque than you already got.

Now, if you had a way to make sure the torque converter was in lockup mode while boosting on a grade, all would be OK. But, from a dead stop, you're going to really hammer things that were not designed for high performance.
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  #13  
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Quote:
Originally Posted by badandy View Post
Curious here - did they put a blower bypass on any of the 6V92's on Wanderlodges? I have seen a few photos of them on the 8v's, but my 6v doesn't have one.
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Originally Posted by Randy Dupree View Post
There os one 1984PT40 with a bypass blower on it.
I know that,because i installed it myself.
But i don't know of any others.
Looks like I would have answered this one wrong - I thought the bypass was standard on "Silver" 6V92's - my 84 ½ "Silver" 6V92 had a bypass.
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  #14  
Old 1 Week Ago
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Quote:
Originally Posted by sfedeli View Post
But, but, but... your drivetrain is at the top end of it's HP rating. The MT654CR is a 300 HP tranny.... The diff is also a little small for much more torque than you already got.

Now, if you had a way to make sure the torque converter was in lockup mode while boosting on a grade, all would be OK. But, from a dead stop, you're going to really hammer things that were not designed for high performance.



And you are right!
The rear axle can take a little more power,but the tranny may be at its limits.
I was just kidding about juicing up the turbo,but adjusting the delay will wake it up a little,or a lot.
When i put the new engine in my 84 after a good long run it would hardly start off from a stop.
The engine would shudder and it sure was not happy.
It was under warranty and i had it into Detroit and they figured out the delay was set too tight,on a hot engine,hot day it would not fuel enough and the engine was really lean on startups.
This spec was a factory spec because of emissions,the shop boss told the tech that there was nothing they could do,put it back together.
And then the boss winked at me and the tech and said "i'm going to lunch".
Eddie,the tech said he was going to check the spec one more time,then he exclaimed "****,i was using the wrong gauge".
He set it with the "right gauge" and it was cured.


Yeah,don't inject anything into the turbo,i had to change a turbo once because of the fins being melted on the hot side.
This was on a Powerstroke Ford.
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  #15  
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Quote:
Originally Posted by Dieselbird01 View Post
Looks like I would have answered this one wrong - I thought the bypass was standard on "Silver" 6V92's - my 84 ½ "Silver" 6V92 had a bypass.



Really,interesting.
When i bought the new engine from Detroit they said the new engines had the bypass blower,that my old engine did not.
So thats what i based my comment on.
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  #16  
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If I did anything crazy, which I'm not, it would be an engine swap with some kind of 6-speed trans and an axle to match. But I really just want to max out my driving experience with the hardware I've got for now and I don't think that's going to hurt the transmission or diff. Throttle delay and a little gov tweak should be good until next winter.
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  #17  
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Quote:
Originally Posted by badandy View Post
If I did anything crazy, which I'm not, it would be an engine swap with some kind of 6-speed trans and an axle to match. But I really just want to max out my driving experience with the hardware I've got for now and I don't think that's going to hurt the transmission or diff. Throttle delay and a little gov tweak should be good until next winter.

Yep,small is sometimes good.
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