Home » Public Forums » GMCnet » [GMCnet] Reviving the Cad 500
( ) 1 Vote
| Re: [GMCnet] Reviving the Cad 500 [message #165426 is a reply to message #165418] |
Thu, 05 April 2012 07:45   |
GMC_LES
Messages: 569
Registered: October 2009
Location: Montreal
Karma: 0
|
Senior Member |
|
|
Hmm,
With Paul stating that the pulley contains the rubber damping component as well as the pulley and hub being considered as one part. I might start wondering if deleting the pulley and installing the Ford serpentine part might have an effect on the crank harmonics.
Maybe a call to the big caddy engine specialists might turn up a few interesting thoughts on the matter?
Les Burt
Montreal
On 2012-04-05, at 6:19 AM, Paul Leavitt <leavittpaul@yahoo.com> wrote:
>
>
> Nope,,,sorry. My 72 has no harmonic ballencer. From what I remember it does have a rubber cusion drive pully. But no "external" balencer per sey.,,,,PL
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Les Burt
Montreal
1975 Eleganza 26ft
A work in Progress
|
|
|
|
| Re: [GMCnet] Reviving the Cad 500 [message #165427 is a reply to message #165416] |
Thu, 05 April 2012 08:10 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Richard,
Your logic is perfectly valid, and in a well financed development project
might well be practical. For me, it's not. Not only is the dyno not
available, but there are a lot of other things that would have to be drug
into the picture: While the converter & transmission might be indicted or
exonerated, the alternator, power steering pump, and A/C compressor, driven
by their serpentine belts, and loaded somehow, would not. Just 'way beyond
my means, ambition, and time.
Thanks for the ideas anyway.
Ken H.
On Thu, Apr 5, 2012 at 4:47 AM, Richard Brown wrote:
> The reason I was thinking about breaking it in using an engine dyno is to
> take the transmission out of the loop temporarily to see if something like
> the torque converter/transmission could be the reason that the thrust
> bearing is failing...
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
| Re: [GMCnet] Reviving the Cad 500 [message #165430 is a reply to message #165421] |
Thu, 05 April 2012 08:16 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Come on, Steve: It took the thrust bearing out in 200 miles during which
the engine speed probably never got over 3000 and ran near 2500 most of the
way. I just cannot imagine longitudinal loads of that magnitude coming
from a radial imbalance at that speed -- even if those. Have I grown that
out of touch with the reality of these things?
Ken H.
On Thu, Apr 5, 2012 at 8:09 AM, Steven Ferguson wrote:
> Ken,
> Shouldn't be a problem IF you have the entire rotating assay balanced.
> That means pistons, rods, a ring pouch, bearing set, flex plate and
> balancer.
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
| Re: [GMCnet] Reviving the Cad 500 [message #165431 is a reply to message #165419] |
Thu, 05 April 2012 08:21 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Johnny,
I'll bet that was an externally balanced engine. My engine guy was
balancing one of those last week and having a heck of a time because of
just that feature.
The Cadillac's internally balanced. While that certainly doesn't exempt it
from becoming imbalanced by external components, I don't think a
machined-round part like a hub and a matching machined-round rigid pulley
are likely to do it. I'll bet the QC rejection rate on those components is
nearly zero.
Ken H.
On Thu, Apr 5, 2012 at 6:26 AM, Johnny Bridges wrote:
> Mopar Performance was adameant that I use the damper which was supplied
> with the crankshaft. How that translates to GM stuff, I dunno. But you
> know it's balanced with the original one.
>
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
| Re: [GMCnet] Reviving the Cad 500 [message #165432 is a reply to message #165426] |
Thu, 05 April 2012 08:27 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Les,
My '76 engine did NOT have ANY rubber in its original pulley. Nor does my
Ford pulley which was basically just bolted onto the Cad hub.
When I called Maximum Torque Specialties last week, I DID discuss my
serpentine belt setup. He didn't think there was any correlation with my
problem.
If that change in drive mechanism was a big enough factor to cause such a
massive problem, I'd expect changing V-belt brands to be a critical factor
to all of us. :-)
Ken H.
On Thu, Apr 5, 2012 at 8:45 AM, Les Burt wrote:
> Hmm,
> With Paul stating that the pulley contains the rubber damping component as
> well as the pulley and hub being considered as one part. I might start
> wondering if deleting the pulley and installing the Ford serpentine part
> might have an effect on the crank harmonics.
>
> Maybe a call to the big caddy engine specialists might turn up a few
> interesting thoughts on the matter?
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
|
|
|
|
| Re: [GMCnet] Reviving the Cad 500 [message #165463 is a reply to message #165431] |
Thu, 05 April 2012 12:51 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
|
Senior Member |
|
|
""I'll bet that was an externally balanced engine. My engine guy was
balancing one of those last week and having a heck of a time because of
just that feature.
The Cadillac's internally balanced. While that certainly doesn't exempt it
from becoming imbalanced by external components, I don't think a
machined-round part like a hub and a matching machined-round rigid pulley
are likely to do it. I'll bet the QC rejection rate on those components is
nearly zero.
Ken H.
""
I don't know about the Cadillac engines, but the Chevy's were no longer dynamically balanced after around 1977 since the variation of the piece parts was considered to be acceptable. Wasn't the mass damper more a consideration for the accessory drive than the crank? If you can buy the damper off the shelf and slap it on your engine, I wouldn't think they are matched to a specific engine??
Bob de Kruyff
78 Eleganza
Chandler, AZ
|
|
|
|
| Re: [GMCnet] Reviving the Cad 500 [message #165466 is a reply to message #162802] |
Thu, 05 April 2012 13:19 |
 |
John Heslinga
Messages: 632
Registered: February 2011
Location: Edmonton, Alberta, Canada
Karma: 4
|
Senior Member |
|
|
Ken:
Boy! Do I understand the frustration that you're having with this issue! I've been there a few times in my career. I've been following your Blog and it is clear that this issue has you ready to pull your hair out. Every time it looked like you found a viable solution and it failed, I re-lived the same feelings that I would go through.
I'm not going to pretend that I know what your problem is: but I have a couple of observations, comments and suggestions that may be of help. I understand the need to be confidant in your next repair and to be able to observe or measure an actual problem or inconsistency so you do not have to do it again. I also believe that you are working with a group of highly experienced and dedicated pros who have made some very interesting and cool observations and suggestions. (Man, would I love to work with some of them!!)
Everyone on the forum is certainly cheering for you, and it appears to be willing to do anything they can to help. (ME TOO!!!)
First: my humble observations and assumptions to give context and reasoning for my suggestions. Many may appear to be intuitively obvious to the casual observer, but can easily be ignored in looking for an annoying problem such as yours. Please bear with me.
The Cad engine that you rebuilt and installed came from a wreck that probably had a fair few miles on it, therefore It would be highly unlikely that there would be any problem with bell housing alignment or the block machining and alignment pins and the crankshaft vs Torque Converter alignment and position. Basic engine geometry should also be on no consequence including accessory loads such as pumps and your serpentine belt system. These wouldn't cause thrust loading problems. Harmonic balancing would cause other crank problems including breakage, and crank snout problems.
You've already replaced the warped flexplate on your first repair. ( My experience, born out also by my recent GMC engine / transmission rebuild and install, is that there is about 1/4 inch or more axial slop between the torque converter and the flexplate before you tighten the TC nuts to the flexplate. Therefore the torque converter is not bottoming out on the transmission pump. I think you also mentioned that you had that clearance on your second install.
The Transmission is also from a working unit with quite a few miles before this: therefore basic bell housing alignment, machining, clearances, and basic geometry should be well within design requirements.
The only thrust loading the TH425 can give is from the torque converter, pump, input shaft, and chain drive gear. All of which must expand that 1/4" or more of axial slop I was referring to earlier, to put much pressure on the engine thrust bearing. ( I would think that you would also have some thrust and surface damage in the transmission pump area and or torque converter as well, because the two pump drive ears would need to push against and pressure the drive gear of the transmission pump) The Torque converter also needs to expand, balloon, or stretch that large distance before it will create that kind of thrust pressure.
My suggestions:
The warped flex plate, install problems, or bad parts may have caused the nose of the Torque Converter or the transmission side of the TC housing to be slightly bent to cause the torque converter to whip slightly as it spins, causing a hammering thrust on the engine ( the flex plate will allow the flexing and springing action to enhance the hammering of the thrust bearing.). Slightly bent crank flywheel mounting flanges may also cause the hammer of the thrust bearing. A slightly rougher thrust crank surface will exasperate the problem and cut through the oil film during this hammer causing the crank to eat into the bearing. (if in fact this is the case)
Your engine machinist will certainly be ensuring the the crank is smooth this time and probably micro-polish and buff the thrust surface. It should almost be mirror smooth. He should also check out the flywheel flange for runout. I'm sure you will ensure that you pre-lube that surface with assembly lube.
You either have the transmission out or it is hanging in the engine bay very easy to remove. Send it to Manny in San Jose and have him put on his test stand. I've seen it and it will help diagnose the transmission completely. He can measure the Torque Converter against a known good one, check the run-out on the input shaft, pump housing, and pump bushings etcetera.
I have been with Manny working on my own transmission, and can confirm that he has the background, knowledge, facilities, attitude, desire, material, and integrity to find and establish if the transmission is at fault for your problem. I brought my tranny from Northern Canada to him and have seen the quality work he does. For your peace of mind, you want to be sure the tranny is not at fault. I believe that Manny also would love to know if the tranny could be your problem.
His test stand has a 455 driving the transmission, a prony brake to fully load the transmission, and access to all of the test ports to measure pressures, both line and cooling. He can confirm if your transmission is doing what it should do. Finally, he will give you the ultimate fix if needed.
Of course you could just replace yours with one of his transmissions to be sure, but there are a lot of people who are now curious and it would be a major let-down for everyone if the answer to your problems was not definitive.
I know you and Manny are on both sides of the continent, but transporting your transmission to San Jose and back would be worth it and if really needed, could be shuttled by so many of the people that you have helped on this forum over the years. (I know I would help but being 12 hours north of the Border won't help)
Sure hope things work out!!
Best regards
John and Cathie Heslinga
1974 Canyonlands 260
455, Manny tranny and 1 ton, 3:70 LS,
Red Seal Journeyman, DTE, BEd. MEd.
Edmonton, Alberta
|
|
|
|
| Re: [GMCnet] Reviving the Cad 500 [message #165505 is a reply to message #165418] |
Thu, 05 April 2012 21:42 |
Kosier
Messages: 834
Registered: February 2008
Karma: 1
|
Senior Member |
|
|
Sorry again, Paul. I don't like to be argumentative, but....
Since the timing marks are on the pulley, it cant be rubber
cushioned.
The balancer is merely tucked behind the pulley,
Gary Kosier
----- Original Message -----
From: "Paul Leavitt" <leavittpaul@yahoo.com>
To: <gmclist@temp.gmcnet.org>
Sent: Thursday, April 05, 2012 6:19 AM
Subject: Re: [GMCnet] Reviving the Cad 500
>
>
> Nope,,,sorry. My 72 has no harmonic ballencer. From what I
> remember it does have a rubber cusion drive pully. But no
> "external" balencer per sey.,,,,PL
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] Reviving the Cad 500 [message #165513 is a reply to message #165466] |
Thu, 05 April 2012 22:16 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
John,
What an Excellent synopsis of my problems and situation! You've obviously
been following the thread carefully. Thank you! I haven't found one
character to disagree with in the whole presentation. And in view of the
specific details you listed, you've obviously done the R&R several times --
or have an excellent memory of a single time.
As I read through your comments about the input to the transmission, I
began to think about running out to the farm and getting one of my spare
transmissions (I think there are 4) to cannibalize for the input bushing
housing -- whatever that disc is called. But when you got to the
suggestion to get a complete replacement from Manny, I realized that you're
right. Whether I can get this one to him or not, considering today's
shipment costs, I need to call him tonight and tell him to send me the one
he's been offering all along. He, and I, don't think there's anything
wrong with it except a leaking accumulator, but I REALLY can't continue
this exercise -- at 75, it's no only no longer fun, it's a really obnoxious
chore. And it's subjecting too many helpful friends to the same labor --
and it's getting hotter'n'hotter here.
Similarly with the torque converter: Midwestern Performance Converters
doesn't think there's anything wrong with the one I've got, but I'm going
to call them tomorrow for a replacement.
From all external appearances, the 500 we pulled yesterday should be in
good shape internally, so I hope to be able to use the factory "fresh"
crank from it. Or perhaps the one I plan to pick up in Atlanta tomorrow
that Dave Mumert found for me.
Thanks for prodding me to make those needed decisions. I'll try to work
out some way to get the transmission back to Manny for analysis if he's
interested.
If all that doesn't cure the problem, I guess I'll just have accept Bob
deK's condemnation of Cadillacs. :-)
Ken H.
On Thu, Apr 5, 2012 at 2:19 PM, John Heslinga wrote:
>
> Ken:
> Boy! Do I understand the frustration that you're having with this issue!
> I've been there a few times in my career. I've been following your Blog
> and it is clear that this issue has you ready to pull your hair out. Every
> time it looked like you found a viable solution and it failed, I re-lived
> the same feelings that I would go through.
> ...
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
| Re: [GMCnet] Reviving the Cad 500 [message #165523 is a reply to message #165430] |
Fri, 06 April 2012 06:47 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
|
Senior Member |
|
|
Well, in the LA engines (which fitted two different crankshafts) the wrong harmonic balancer fitted will produce an incredible shake. Such that on initial startup and high idle for cam/lifter breakin, I shut the thing off because something was obviiously wrong. In those engines, the difference is pronounced between the balancers because they fitted both cast and forged crankshafts. As to whether a harmonic imbalance a) exists or existed in your case; and b) whether or not it might translate into a front - to - back loading, I leave to the gurus here. However, having been bit,. I'd be well and for fair sure I had the correct balancer on the engine. A 'pulley mounted in rubber' says to me "Balancer".
--johnny
'76 23' transmode norris
'76 palm beach
From: Ken Henderson <hend4800@bellsouth.net>
To: gmclist@temp.gmcnet.org
Sent: Thursday, April 5, 2012 9:16 AM
Subject: Re: [GMCnet] Reviving the Cad 500
Come on, Steve: It took the thrust bearing out in 200 miles during which
the engine speed probably never got over 3000 and ran near 2500 most of the
way. I just cannot imagine longitudinal loads of that magnitude coming
from a radial imbalance at that speed -- even if those. Have I grown that
out of touch with the reality of these things?
Ken H.
On Thu, Apr 5, 2012 at 8:09 AM, Steven Ferguson wrote:
> Ken,
> Shouldn't be a problem IF you have the entire rotating assay balanced.
> That means pistons, rods, a ring pouch, bearing set, flex plate and
> balancer.
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
|
|
|
|
| Re: [GMCnet] Reviving the Cad 500 [message #165524 is a reply to message #165431] |
Fri, 06 April 2012 06:52 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
|
Senior Member |
|
|
I wrote the other reply before I saw this :). I simply couldn't - and can't - think of a good reason to isolate a simple pulley that way. Money is invloved - and if everything is concentric the potential for failure in service would go through the roof. However, auto engineers do what we'd consider Strange Things because they have both inform,ation and constraints in the design and debug process we normally aren't aware of.
And, while I sympathize with the trouble you have, I'm also intrigued to find out what's causing it. It's a lot less stressful when it's someone else's equipment!
--johnny
'76 23' transmode norris
'76 palm beach
From: Ken Henderson <hend4800@bellsouth.net>
To: gmclist@temp.gmcnet.org
Sent: Thursday, April 5, 2012 9:21 AM
Subject: Re: [GMCnet] Reviving the Cad 500
Johnny,
I'll bet that was an externally balanced engine. My engine guy was
balancing one of those last week and having a heck of a time because of
just that feature.
The Cadillac's internally balanced. While that certainly doesn't exempt it
from becoming imbalanced by external components, I don't think a
machined-round part like a hub and a matching machined-round rigid pulley
are likely to do it. I'll bet the QC rejection rate on those components is
nearly zero.
Ken H.
On Thu, Apr 5, 2012 at 6:26 AM, Johnny Bridges wrote:
> Mopar Performance was adameant that I use the damper which was supplied
> with the crankshaft. How that translates to GM stuff, I dunno. But you
> know it's balanced with the original one.
>
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
|
|
|
|
| Re: [GMCnet] Reviving the Cad 500 [message #165529 is a reply to message #165430] |
Fri, 06 April 2012 07:45 |
Steven Ferguson
Messages: 3447
Registered: May 2006
Karma: 0
|
Senior Member |
|
|
Ken,
I'm not saying that was the cause, it definitely wasn't. I'm saying that
if you swap cranks, that is what it will take to balance the engine.
You're not out of touch Ken, just read the thread that post was related to.
I don't recall which side of the thrust took the brunt of the wear. FWD
side, or trans side?
On Thu, Apr 5, 2012 at 6:16 AM, Ken Henderson <hend4800@bellsouth.net>wrote:
> Come on, Steve: It took the thrust bearing out in 200 miles during which
> the engine speed probably never got over 3000 and ran near 2500 most of the
> way. I just cannot imagine longitudinal loads of that magnitude coming
> from a radial imbalance at that speed -- even if those. Have I grown that
> out of touch with the reality of these things?
>
> Ken H.
>
>
> On Thu, Apr 5, 2012 at 8:09 AM, Steven Ferguson wrote:
>
> > Ken,
> > Shouldn't be a problem IF you have the entire rotating assay balanced.
> > That means pistons, rods, a ring pouch, bearing set, flex plate and
> > balancer.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Fathom the hypocrisy of a nation where every citizen must prove they have
health insurance......but not everyone has to prove they're a citizen.
Steve Ferguson
Sierra Vista, AZ
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] Reviving the Cad 500 [message #165532 is a reply to message #165529] |
Fri, 06 April 2012 07:56 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Steve,
It was the transmission side that got the damage.
You're right about the balance with replacement crank. Thanks for
reminding me; it hadn't yet crossed my mind. I'm sure my engine guy would
have reminded me too.
Ken H.
On Fri, Apr 6, 2012 at 8:45 AM, Steven Ferguson wrote:
> Ken,
> I'm not saying that was the cause, it definitely wasn't. I'm saying that
> if you swap cranks, that is what it will take to balance the engine.
> You're not out of touch Ken, just read the thread that post was related to.
> I don't recall which side of the thrust took the brunt of the wear. FWD
> side, or trans side?
>
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
| Re: [GMCnet] Reviving the Cad 500 [message #165534 is a reply to message #165513] |
Fri, 06 April 2012 08:06 |
Marsh Wilkes
Messages: 155
Registered: January 2004
Karma: -3
|
Senior Member |
|
|
Hi Ken,
You know as well as I do, you can't go wrong with a transmission from Manny,
in the long run it's a good decision regardless of any thing else.
I think Manny has torque converters specially prepared for his
transmissions, I would talk with him before ordering one elsewhere.
You normally respond to each post with suggestions, I didn't see a response
when I suggested the possibility of devising a way to measure the thrust,
just wondering if you missed the post or thought the idea was that nutty?
Good Luck
Marsh Wilkes
Perry Florida
----- Original Message -----
From: "Ken Henderson" <hend4800@bellsouth.net>
To: <gmclist@temp.gmcnet.org>
Sent: Thursday, April 05, 2012 11:16 PM
Subject: Re: [GMCnet] Reviving the Cad 500
>
> Similarly with the torque converter: Midwestern Performance Converters
> doesn't think there's anything wrong with the one I've got, but I'm going
> to call them tomorrow for a replacement.
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] Reviving the Cad 500 [message #165536 is a reply to message #165534] |
Fri, 06 April 2012 08:19 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Marsh,
No, I didn't intentionally ignore your note about measuring thrust -- it
just got lost in the shuffle & fatigue. It really wouldn't be that big a
task to rig a support across the front of the crank hub for a ball bearing
driven strain gauge connected to the cockpit PC for recording. I'd
probably win the "most instrumented" award with a setup like that! But I'm
not sure I could do it in time for Bowling Green or even Bean Station. :-)
Now if you'd get it all fabricated & the software written & send it up
here, I could probably get it mounted in time.
Ken H.
On Fri, Apr 6, 2012 at 9:06 AM, Marsh Wilkes <gmc455@comcast.net> wrote:
> Hi Ken,
>
> You know as well as I do, you can't go wrong with a transmission from
> Manny,
> in the long run it's a good decision regardless of any thing else.
> I think Manny has torque converters specially prepared for his
> transmissions, I would talk with him before ordering one elsewhere.
> You normally respond to each post with suggestions, I didn't see a response
> when I suggested the possibility of devising a way to measure the thrust,
> just wondering if you missed the post or thought the idea was that nutty?
>
> Good Luck
>
> Marsh Wilkes
> Perry Florida
>
>
> ----- Original Message -----
> From: "Ken Henderson" <hend4800@bellsouth.net>
> To: <gmclist@temp.gmcnet.org>
> Sent: Thursday, April 05, 2012 11:16 PM
> Subject: Re: [GMCnet] Reviving the Cad 500
> >
> > Similarly with the torque converter: Midwestern Performance Converters
> > doesn't think there's anything wrong with the one I've got, but I'm going
> > to call them tomorrow for a replacement.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
| Re: [GMCnet] Reviving the Cad 500 [message #165544 is a reply to message #165536] |
Fri, 06 April 2012 09:05 |
Marsh Wilkes
Messages: 155
Registered: January 2004
Karma: -3
|
Senior Member |
|
|
Hi Ken,
What can I say?
I know you were being tongue in cheek, but taken to that level it would damn
sure nail the problem.
Marsh
----- Original Message -----
From: "Ken Henderson" <hend4800@bellsouth.net>
To: <gmclist@temp.gmcnet.org>
Sent: Friday, April 06, 2012 9:19 AM
Subject: Re: [GMCnet] Reviving the Cad 500
> Marsh,
>
> No, I didn't intentionally ignore your note about measuring thrust -- it
> just got lost in the shuffle & fatigue. It really wouldn't be that big a
> task to rig a support across the front of the crank hub for a ball bearing
> driven strain gauge connected to the cockpit PC for recording. I'd
> probably win the "most instrumented" award with a setup like that! But
> I'm
> not sure I could do it in time for Bowling Green or even Bean Station. :-)
>
> Now if you'd get it all fabricated & the software written & send it up
> here, I could probably get it mounted in time.
>
> Ken H.
>
>
> On Fri, Apr 6, 2012 at 9:06 AM, Marsh Wilkes <gmc455@comcast.net> wrote:
>
>> Hi Ken,
>>
>> You know as well as I do, you can't go wrong with a transmission from
>> Manny,
>> in the long run it's a good decision regardless of any thing else.
>> I think Manny has torque converters specially prepared for his
>> transmissions, I would talk with him before ordering one elsewhere.
>> You normally respond to each post with suggestions, I didn't see a
>> response
>> when I suggested the possibility of devising a way to measure the thrust,
>> just wondering if you missed the post or thought the idea was that nutty?
>>
>> Good Luck
>>
>> Marsh Wilkes
>> Perry Florida
>>
>>
>> ----- Original Message -----
>> From: "Ken Henderson" <hend4800@bellsouth.net>
>> To: <gmclist@temp.gmcnet.org>
>> Sent: Thursday, April 05, 2012 11:16 PM
>> Subject: Re: [GMCnet] Reviving the Cad 500
>> >
>> > Similarly with the torque converter: Midwestern Performance Converters
>> > doesn't think there's anything wrong with the one I've got, but I'm
>> > going
>> > to call them tomorrow for a replacement.
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
Goto Forum:
Current Time: Fri May 03 06:02:17 CDT 2024
Total time taken to generate the page: 0.02476 seconds
|
GMCforum
Search
Help
Register
Login
Home
