| Re: [GMCnet] disk brake upgrade [message #234888] |
Fri, 03 January 2014 00:11  |
rallymaster
Messages: 662
Registered: February 2004
Location: North Plains, ORYGUN
Karma: -4
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Senior Member |
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Try that on a 15% downgrade with a 15 mph speed limit and a 90 degree
turn at the bottom and see if you still feel that way.
RonC
On Thu, 02 Jan 2014 21:18:25 -0600 Bob de Kruyff <NEXT2POOL@AOL.COM>
writes:
>
>
I'm not against any of the brake upgrades, but you sound like you
> have been infected with forum paranoia :) A stock brake system if it
> is set up correctly will let you travel safely anywhere in this
> country without even thinking about it. There' a natural tendency
> here for people to immediately look at alternatives if a stock
> system isn't performing. People here are innovative and love to
> dabble in ways to improve the coach. But that's not for everyone. I
> run stock brakes in the mountains here and have never experienced
> fade nor in-ability to stop. GM designed a safe and well performing
> coach in the 70's and if maintained and adjusted correctly, will
> perform well to current standards. The problem is that most people
> here bought old coaches and have never experienced one that is in or
> close to design intent. If you buy a frapped out coach, you get what
> you paid for. Given all that, there's nothing wrong with stopping
> quicker or accelerating faster--that's always the chalenge a
> nd fun part, but your wallet can suffer dramatically. If you follow
> car magazines or Autoweek on TV you will see that modern cars will
> stop from 60mph anywhere from about 125 ft down to 110 feet. Those
> that stop in 110 feet will say that anything else is
> dangerous--that's hype and great for enthusiasts but not practical
> for normal people.
> --
> Bob de Kruyff
> 78 Eleganza
> Chandler, AZ
>
> GMCnet mailing list
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>
Ron & Linda Clark
1978 Eleganza II
North Plains, ORYGUN
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Ron & Linda Clark
North Plains, ORYGUN
78 Eleganza II
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| Re: [GMCnet] disk brake upgrade [message #234944 is a reply to message #234888] |
Fri, 03 January 2014 13:12  |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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""Try that on a 15% downgrade with a 15 mph speed limit and a 90 degree
turn at the bottom and see if you still feel that way. ""
Well I wouldn't take the Queen Mary down the Mississippi either.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] disk brake upgrade [message #234948 is a reply to message #234944] |
Fri, 03 January 2014 14:57 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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| Bob de Kruyff wrote on Fri, 03 January 2014 14:12 |
Well I wouldn't take the Queen Mary down the Mississippi either.
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Assuming you mean QM2, she won't fit. (The original is kind of stuck in Long Beach.)
And, you are capable of firing synapse in the correct order to avoid such events.
| Bob de Kruyff wrote on Fri, 03 January 2014 13:51 |
""If you try to engage a lower gear while over speed as judged by the transmission governor, it will slip clutches until it is down to the speed it likes. This can smoke a clutch. That is true whether it is automatic or a mishandled manual.
""
That part I don't agree with Matt. The hydraulic shift logic will not try to force a downshift until the engine RPM/roadspeed is within the normal shift curve for the transmission. If you have a "shift kit" installed, you will lose that safety over ride. Now,any shift under high torque conditions is tougher on bands/clutches than a nice gentle shift under low torque, but with adequate pressures you really shouldn't have much of an issue.
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Bob,
That may be. And, it is nice to know that they should not.
As said, I am no expert on any automatic transmission.
The memory is based on an inertial stand* test we ran with a 302 and AOD. The cycle program was to duplicate a warranty issue and we were requested run a cycle several times and then at jam the shift down to second at some road speed that made no sense. (Test descriptions from OEs often make no sense, but we would set up and do as they asked and them get to bill them to fix it.) Maybe it wasn't supposed to, but it did it a for less than a day. It may not have been a stock trans - one never knows with OE tests. It smelled terrible, so we put it back in the can in came in. (Transmissions often ship in a barrel.) It went home. I didn't run the next test, I was needed for a diesel.
*An inertial stand is a large housing with a huge flywheel to duplicate the inertia of a vehicle at the drive shaft. Much less expensive and more repeatable then using a whole vehicle.
Off this topic....
The man that took away my little car (long story) came with one of your dollies. Nice piece of gear...
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] disk brake upgrade [message #235012 is a reply to message #234948] |
Fri, 03 January 2014 23:15 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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""Bob,
That may be. And, it is nice to know that they should not.
As said, I am no expert on any automatic transmission.
The memory is based on an inertial stand* test we ran with a 302 and AOD. The cycle program was to duplicate a warranty issue and we were requested run a cycle several times and then at jam the shift down to second at some road speed that made no sense. (Test descriptions from OEs often make no sense, but we would set up and do as they asked and them get to bill them to fix it.) Maybe it wasn't supposed to, but it did it a for less than a day. It may not have been a stock trans - one never knows with OE tests. It smelled terrible, so we put it back in the can in came in. (Transmissions often ship in a barrel.) It went home. I didn't run the next test, I was needed for a diesel.
*An inertial stand is a large housing with a huge flywheel to duplicate the inertia of a vehicle at the drive shaft. Much less expensive and more repeatable then using a whole vehicle.
Off this topic.... "' yes Matt, I see what you are referring to. Those were rock cycles and recognized the inertia effects of shift energy--something we haven't talked much about here. That was great for validation testing but not so much what we do in on the road .
Bob de Kruyff
78 Eleganza
Chandler, AZ
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