Home » Public Forums » GMCnet » Installed LS 3.70 FD (Installation completed by Zeb Frady.)
| Installed LS 3.70 FD [message #163346] |
Sun, 18 March 2012 06:18  |
George Zhookoff
Messages: 398
Registered: December 2004
Location: Snellville, GA
Karma: 6
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Brought home my 78 EL II from Zeb Frady at Southland Motor Home, Buford, GA. Zeb (actually his sons, I think) installed my new LS 3.70 FD. Took all of a couple of days, from Saturday drop off to Saturday pick up, whew! My 403 now has some pick and go. Zeb said he took the coach out for the "installation completed" check ride. He mentioned how nice my brakes are and that the reaction arm brake system really gets the coach to hunker down and STOP! So 2 thumbs up from one of our GMC Gurus.
George (completing the Bean Station registration next) Zhookoff
78 EL II
Atlanta
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| Re: [GMCnet] Installed LS 3.70 FD [message #163360 is a reply to message #163346] |
Sun, 18 March 2012 10:08  |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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George,
You can bump ut the timing 2-3 degrees as the engine now operates with
less load.
You will then realize a better milage of 5-12%.
Migule at MGM loves our 3.70.
On Sun, Mar 18, 2012 at 4:18 AM, George Zhookoff
<George.Zhookoff@haskell.com> wrote:
>
>
> Brought home my 78 EL II from Zeb Frady at Southland Motor Home, Buford, GA. Zeb (actually his sons, I think) installed my new LS 3.70 FD. Â Took all of a couple of days, from Saturday drop off to Saturday pick up, whew! Â My 403 now has some pick and go. Â Zeb said he took the coach out for the "installation completed" check ride. Â He mentioned how nice my brakes are and that the reaction arm brake system really gets the coach to hunker down and STOP! Â So 2 thumbs up from one of our GMC Gurus.
>
> George (completing the Bean Station registration next) Zhookoff
> 78 EL II
> Atlanta
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Installed LS 3.70 FD [message #163399 is a reply to message #163360] |
Sun, 18 March 2012 13:47 |
jayrabe
Messages: 509
Registered: June 2009
Location: Portland, OR
Karma: 0
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Been reading this thread with a lot of interest since the LS 3.70 has been on my list for awhile.
But I was thinking about it while driving this morning and noticed that at 60mph I'm turning 2900 rpm, and I know the 3.70 will run even higher rpm at same speed, so should I be concerned or is there something else going on?
Thanks,
Jay Rabe
76 PB
Portland, OR
> Date: Sun, 18 Mar 2012 08:08:31 -0700
> From: jimkanomata@gmail.com
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Installed LS 3.70 FD
>
> George,
> You can bump ut the timing 2-3 degrees as the engine now operates with
> less load.
> You will then realize a better milage of 5-12%.
> Migule at MGM loves our 3.70.
>
> On Sun, Mar 18, 2012 at 4:18 AM, George Zhookoff
> <George.Zhookoff@haskell.com> wrote:
> >
> >
> > Brought home my 78 EL II from Zeb Frady at Southland Motor Home, Buford, GA. Zeb (actually his sons, I think) installed my new LS 3.70 FD. Took all of a couple of days, from Saturday drop off to Saturday pick up, whew! My 403 now has some pick and go. Zeb said he took the coach out for the "installation completed" check ride. He mentioned how nice my brakes are and that the reaction arm brake system really gets the coach to hunker down and STOP! So 2 thumbs up from one of our GMC Gurus.
> >
> > George (completing the Bean Station registration next) Zhookoff
> > 78 EL II
> > Atlanta
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
>
>
> --
> Jim Kanomata
> Applied/GMC, Fremont,CA
> jimk@appliedairfilters.com
> http://www.appliedgmc.com
> 1-800-752-7502
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] Installed LS 3.70 FD [message #163406 is a reply to message #163399] |
Sun, 18 March 2012 14:32 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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I don't think mione spins that fast at 60 per. More like 2400. Now, I have stock wheels and tyres, so there may be a difference there. I'm using a Sun Cheap Line tach driven off the TACH terminal of the HEI, and the stock speedo. I note, the speedo is pessimistic by a couple of percent at 60. Given the lack of driveshaft on these toys, it ain't quite so easy as one might like to check the true ratio of the diff.
--johnny
'76 23' transmo9de norris
'76 palm beach
________________________________
From: Jay Rabe <jayrabe@hotmail.com>
To: gmclist@temp.gmcnet.org
Sent: Sunday, March 18, 2012 2:47 PM
Subject: Re: [GMCnet] Installed LS 3.70 FD
Been reading this thread with a lot of interest since the LS 3.70 has been on my list for awhile.
But I was thinking about it while driving this morning and noticed that at 60mph I'm turning 2900 rpm, and I know the 3.70 will run even higher rpm at same speed, so should I be concerned or is there something else going on?
Thanks,
Jay Rabe
76 PB
Portland, OR
> Date: Sun, 18 Mar 2012 08:08:31 -0700
> From: jimkanomata@gmail.com
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Installed LS 3.70 FD
>
> George,
> You can bump ut the timing 2-3 degrees as the engine now operates with
> less load.
> You will then realize a better milage of 5-12%.
> Migule at MGM loves our 3.70.
>
> On Sun, Mar 18, 2012 at 4:18 AM, George Zhookoff
> <George.Zhookoff@haskell.com> wrote:
> >
> >
> > Brought home my 78 EL II from Zeb Frady at Southland Motor Home, Buford, GA. Zeb (actually his sons, I think) installed my new LS 3.70 FD. Took all of a couple of days, from Saturday drop off to Saturday pick up, whew! My 403 now has some pick and go. Zeb said he took the coach out for the "installation completed" check ride. He mentioned how nice my brakes are and that the reaction arm brake system really gets the coach to hunker down and STOP! So 2 thumbs up from one of our GMC Gurus.
> >
> > George (completing the Bean Station registration next) Zhookoff
> > 78 EL II
> > Atlanta
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
>
>
> --
> Jim Kanomata
> Applied/GMC, Fremont,CA
> jimk@appliedairfilters.com
> http://www.appliedgmc.com
> 1-800-752-7502
> _______________________________________________
> 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:
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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
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| Re: [GMCnet] Installed LS 3.70 FD [message #163410 is a reply to message #163406] |
Sun, 18 March 2012 15:51 |
Don A
Messages: 895
Registered: October 2008
Location: Dallas, TX
Karma: 0
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Senior Member |
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<<<<<< Given the lack of driveshaft on these toys, it ain't quite so easy as one might like to check the true ratio of the diff. >>>>
and that doesn't count the possibilty of changed gears on the chain. Sure wish I could could mechanically determine the ratio !!
Don Adams Dallas, TX
'76 26' Glenbrook, '90 Sidekick
rebuilt by R Archer, powered by J Bounds, Koba
[IMG]http://www.gmcmhphotos.com/photos/data/6109/G2.jpg[/IMG]
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| Re: [GMCnet] Installed LS 3.70 FD [message #163411 is a reply to message #163406] |
Sun, 18 March 2012 16:00 |
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mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
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Senior Member |
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| Johnny Bridges wrote on Sun, 18 March 2012 12:32 |
I don't think mione spins that fast at 60 per. More like 2400. Now, I have stock wheels and tyres, so there may be a difference there. ....
... I note, the speedo is pessimistic by a couple of percent at 60. ...
|
Jay, What are you using to measure the 60mph?
All three of my coaches would be doing about 70 when the stock speedo was reading 60.
(Removing the stock CC helped on the '78 and with a small gear change matches the GPS.)
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
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| Re: [GMCnet] Installed LS 3.70 FD [message #163436 is a reply to message #163406] |
Sun, 18 March 2012 20:11 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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""I don't think mione spins that fast at 60 per. More like 2400. Now, I have stock wheels and tyres, so there may be a difference there. I'm using a Sun Cheap Line tach driven off the TACH terminal of the HEI, and the stock speedo. I note, the speedo is pessimistic by a couple of percent at 60. Given the lack of driveshaft on these toys, it ain't quite so easy as one might like to check the true ratio of the diff.
""
It's even easier. Put the trans in park, turn one wheel and count the number of turns the other turns and divide by 2.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Installed LS 3.70 FD [message #163443 is a reply to message #163436] |
Sun, 18 March 2012 20:46 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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We have a trade in program for those that want to do so.
Contact me and I can quote on one.
Ignition timing is not what the marketing people call for but the
mission people do.
When Ford had a drivability problem in 1974, I unofficially showed
them how to set the timing by the book then slip and accidentally
advance the timing about 2-3 degrees before locking down the
distributor.
On Sun, Mar 18, 2012 at 6:11 PM, Bob de Kruyff <NEXT2POOL@aol.com> wrote:
>
>
> ""I don't think mione spins that fast at 60 per. Â More like 2400. Â Now, I have stock wheels and tyres, so there may be a difference there. Â I'm using a Sun Cheap Line tach driven off the TACH terminal of the HEI, and the stock speedo. Â I note, the speedo is pessimistic by a couple of percent at 60. Â Given the lack of driveshaft on these toys, it ain't quite so easy as one might like to check the true ratio of the diff.
> ""
>
> It's even easier. Put the trans in park, turn one wheel and count the number of turns the other turns and divide by 2.
> --
> Bob de Kruyff
> 78 Eleganza
> Chandler, AZ
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Installed LS 3.70 FD [message #163452 is a reply to message #163411] |
Sun, 18 March 2012 21:29 |
jayrabe
Messages: 509
Registered: June 2009
Location: Portland, OR
Karma: 0
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Senior Member |
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Speed according to dash gauge, from Custom Instrument Panels by a PO. But I have checked it through highway odo checks and it's pretty close.
Don't know what diff I have, but pretty sure it's not stock, as I have references in notes from PO that it could be a 3.42 or a 3.50.
Jay Rabe
76 PB
Portland, OR
> To: gmclist@temp.gmcnet.org
> From: m000035@gmail.com
> Date: Sun, 18 Mar 2012 16:00:05 -0500
> Subject: Re: [GMCnet] Installed LS 3.70 FD
>
>
>
> Johnny Bridges wrote on Sun, 18 March 2012 12:32
> > I don't think mione spins that fast at 60 per. More like 2400. Now, I have stock wheels and tyres, so there may be a difference there. ....
> >
> > ... I note, the speedo is pessimistic by a couple of percent at 60. ...
>
>
> Jay, What are you using to measure the 60mph?
>
> All three of my coaches would be doing about 70 when the stock speedo was reading 60.
>
> (Removing the stock CC helped on the '78 and with a small gear change matches the GPS.)
> --
> Mike Miller -- Hillsboro, OR -- on the Black list
> (#1)'73 26' exPainted D. -- (#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
> http://m000035.blogspot.com
> _______________________________________________
> 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
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| Re: [GMCnet] Installed LS 3.70 FD [message #163486 is a reply to message #163436] |
Mon, 19 March 2012 06:57 |
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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 Sun, 18 March 2012 21:11 |
""I don't think mione spins that fast at 60 per. More like 2400. Now, I have stock wheels and tyres, so there may be a difference there. I'm using a Sun Cheap Line tach driven off the TACH terminal of the HEI, and the stock speedo. I note, the speedo is pessimistic by a couple of percent at 60. Given the lack of driveshaft on these toys, it ain't quite so easy as one might like to check the true ratio of the diff.
""
It's even easier. Put the trans in park, turn one wheel and count the number of turns the other turns and divide by 2.
|
Bob,
That isn't going to get you the FD ratio. You aren't involving the ring and pinion.
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] Installed LS 3.70 FD [message #163488 is a reply to message #163443] |
Mon, 19 March 2012 07:01 |
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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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| jimk wrote on Sun, 18 March 2012 21:46 |
We have a trade in program for those that want to do so.
Contact me and I can quote on one.
Ignition timing is not what the marketing people call for but the mission people do.
When Ford had a drivability problem in 1974, I unofficially showed them how to set the timing by the book then slip and accidentally advance the timing about 2-3 degrees before locking down the distributor.
|
This a memory I enjoy.
About that time, I was helping a friend tune up (a real tune-up R&R points and plugs, set valve lash at least). The car was "new to him" and neither of us knew the engine well, so we read the book. When we got done, it ran like 5h1t...
We Checked Everything again, dwell, plug gaps, valve lash, the vacuum and mechanical advances. We even ran a check to confirm that the TDC mark was correct. Nothing - Zip - Nada
Finally, I called a friend that was a lifelong Ford guy.
He asked if we had set it up by the book?
When we said, "Yes."
He responded, "There's your problem!! - Bump the timing ahead 5."
We did and the result was a vast improvement.
Speaking of timing...
Does anybody know why GM/Olds does not give a base timing specification (like 4° at 650) instead of having you shot at a moving target when the advance is already on the curve at 1100RPM?
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] Installed LS 3.70 FD [message #163500 is a reply to message #163486] |
Mon, 19 March 2012 08:13 |
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 isn't going to get you the FD ratio. You aren't involving the ring and pinion.
Matt ""
What was I thinking? Chalk that one up to the "wrong half the time" 
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Installed LS 3.70 FD [message #163501 is a reply to message #163360] |
Mon, 19 March 2012 09:37 |
George Zhookoff
Messages: 398
Registered: December 2004
Location: Snellville, GA
Karma: 6
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Senior Member |
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<<George,
You can bump ut the timing 2-3 degrees as the engine now operates with
less load.
You will then realize a better milage of 5-12%.
Migule at MGM loves our 3.70.
> Brought home my 78 EL II from Zeb Frady at Southland Motor Home, Buford, GA.>>
Jim,
Thanks! I'll be working on the engine this week end. Oil change, etc.
Once finished I plan on a short cruise with the gps on to record rpms/gps mph and will report back.
I have the 3.07 (78 EL II, ~81,000 m)available as I had a core available to return with the original transaction. Anyone interested?
George Zhookoff
78 EL II
Atlanta
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