GMCforum
For enthusiast of the Classic GMC Motorhome built from 1973 to 1978. A web-based mirror of the GMCnet mailing list.

Home » Public Forums » GMCnet » EFI and Timing Control
EFI and Timing Control [message #217729] Sun, 11 August 2013 04:29 Go to next message
jturbo is currently offline  jturbo   United States
Messages: 76
Registered: August 2013
Location: Socal
Karma: 1
Member
installing EFI on 3 GMC motorhomes.

We want to possibly do timing control.

I have been reading that the 307 distributor will do this.

But also read the corvette and camaro will too.

Anyone know for sure and which is better??

2 are 455 and 1 is 403




1978 Royal 403 1977 Birchaven 455 1977 Kingsley 455 All under Upgrading and restoration Rosemead California
Re: EFI and Timing Control [message #217738 is a reply to message #217729] Sun, 11 August 2013 07:30 Go to previous messageGo to next message
rvanwin is currently offline  rvanwin   United States
Messages: 325
Registered: April 2007
Location: Battlefield, MO
Karma: 6
Senior Member
jturbo wrote on Sun, 11 August 2013 04:29

installing EFI on 3 GMC motorhomes.

We want to possibly do timing control.

I have been reading that the 307 distributor will do this.

But also read the corvette and camaro will too.

Anyone know for sure and which is better??

2 are 455 and 1 is 403




I have never heard that a corvette or camaro distributor will work. Doubt that they will because the Olds distributor turns the opposite direction than Chevies. Here is the list of donor vehicles that have the Olds 307 distributor that is a drop in replacement for the 455 and 403. You can also get a Patterson rebuilt CCD distributor. This was posted on the gmcmh efi google groups forum. You may want to join there if not already. Lots of good information and also access to google sites that has tip, tweaks, and other related efi information.


A1C301873 DISTRIBUTOR IGNITION CRDNE 1 $109.99


I decided on a rebuilt distributor as it seemed pretty cheap and that way I new the module was working and the bearings would be good. I believe there is only one company doing them. It is a Cardone 30-1873 This one comes with a 7 pin module and I did not have a pigtail to plug into it. I had to go to the moon and back in a goat's mouth to find one. Finally found one in Rimrock, AZ.

Here is a paste of the list of cars O'Riley's Claims it fits. Remember that it must come from a V8:


Buick back to top
1981 - 1989 Electra

1986 - 1987 Regal
1981 - 1990 Lesabre

1981 - 1985 Riviera
Cadillac back to top
1987 - 1990 Brougham

1986 Fleetwood
Chevrolet back to top
1986 - 1990 Caprice

Oldsmobile back to top
1981 - 1984 98

1980 Cutlass Salon
1981 - 1990 Custom Cruiser

1985 - 1987 Cutlass Salon
1980 - 1981 Cutlass

1980 - 1988 Cutlass Supreme
1985 Cutlass

1980 - 1985 Delta 88
1980 - 1985 Cutlass Calais

1981 - 1985 Toronado
1980 - 1983 Cutlass Cruiser

Pontiac back to top
1981 Bonneville

1981 Parisienne
1981 Catalina

1986 Parisienne
1981 Laurentian

1987 - 1989 Safari


Randy & Margie
'77 Eleganza II '403'
Battlefield, MO
Re: EFI and Timing Control [message #217739 is a reply to message #217738] Sun, 11 August 2013 07:43 Go to previous messageGo to next message
rvanwin is currently offline  rvanwin   United States
Messages: 325
Registered: April 2007
Location: Battlefield, MO
Karma: 6
Senior Member
rvanwin wrote on Sun, 11 August 2013 07:30

jturbo wrote on Sun, 11 August 2013 04:29

installing EFI on 3 GMC motorhomes.

We want to possibly do timing control.

I have been reading that the 307 distributor will do this.

But also read the corvette and camaro will too.

Anyone know for sure and which is better??

2 are 455 and 1 is 403




You may want to join there if not already. Lots of good information and also access to google sites that has tip, tweaks, and other related efi information.



Oops, forgot the link:
https://groups.google.com/forum/#!forum/gmcmh-efi


Randy & Margie
'77 Eleganza II '403'
Battlefield, MO
Re: EFI and Timing Control [message #217928 is a reply to message #217738] Sun, 11 August 2013 23:49 Go to previous messageGo to next message
jturbo is currently offline  jturbo   United States
Messages: 76
Registered: August 2013
Location: Socal
Karma: 1
Member
does anyone have pictures of the Right distributor from the 307 and what the harness looks like.

Also What I read on the Corvette thing is to get corvette module and use it in the original Dist and rip out the weights and vacuum advance.






1978 Royal 403 1977 Birchaven 455 1977 Kingsley 455 All under Upgrading and restoration Rosemead California
Re: [GMCnet] EFI and Timing Control [message #218475 is a reply to message #217928] Thu, 15 August 2013 12:16 Go to previous messageGo to next message
rvanwin is currently offline  rvanwin   United States
Messages: 325
Registered: April 2007
Location: Battlefield, MO
Karma: 6
Senior Member
Not sure anyone ansered your question about a picture. I don't have mine
out of the engine so can't get a picture. I looked up the distributor for
one of the vehicles I posted earlier and it shows a picture.
http://www.oreillyauto.com/site/c/search/Distributor/02780/C0334.oap?model=Brougham&vi=1027145&year=1988&make=Cadillac

Might give you an idea. Actually, it looks just like the OEM distributor
without the weight mechanism and the vacuum advance mechanism. And yes,
you can convert the OEM to become a electronic. I don't believe that it
requires a module specific to a corvette. Any GM 7 pin module should do
the job. I have read instructions on the internet on how to do the
conversion. I have also heard an example of someone who did not get the
mechanical advance mechanism stabilized well enough and it slipped causing
damage to his engine.

Randy (thinking I would make sure the mechanism has no chance of slipping)
'77 Eleganza II "403"
On Aug 11, 2013 11:49 PM, "john" <tg16jturbo@mac.com> wrote:

>
>
> does anyone have pictures of the Right distributor from the 307 and what
> the harness looks like.
>
> Also What I read on the Corvette thing is to get corvette module and use
> it in the original Dist and rip out the weights and vacuum advance.
>
>
>
>
>
> _______________________________________________
> 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



Randy & Margie
'77 Eleganza II '403'
Battlefield, MO
Re: [GMCnet] EFI and Timing Control [message #218556 is a reply to message #218475] Fri, 16 August 2013 08:14 Go to previous messageGo to next message
Loffen is currently offline  Loffen   Norway
Messages: 1087
Registered: August 2013
Location: Norway
Karma: 1
Senior Member
What about the MSD Atomic system ?
I am thinking about buying a complete setup with the distributor, any comments and thoughts ?

Here is a link to a Ebay auction : http://www.ebay.com/itm/190767437889?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649


1973 23' # 1848 Sky Blue Glacier called Baby Blue and a 1973 26'-3 # 1460 Parrot green Seqouia Known as the Big Green, And sold my 1973 26'-2 # 581 White Canyon lands under the name Dobbelt trøbbel in Norway
Re: EFI and Timing Control [message #218559 is a reply to message #217729] Fri, 16 August 2013 08:34 Go to previous messageGo to next message
winter is currently offline  winter   United States
Messages: 247
Registered: September 2007
Location: MPLS MN
Karma: 0
Senior Member
I looked into the atomic system a while back but got cold feet when it came to the service end of the system.

Correct me if i'm wrong but it looks like you need to send the whole thing in to get fixed rather than just replace a single part.

Other than that it looked like a solid set up.


Jerrod Winter
1977 Palm Beach
Green Jelly Bean
Twin Cities, Minnesota
Re: EFI and Timing Control [message #218563 is a reply to message #217729] Fri, 16 August 2013 08:56 Go to previous messageGo to next message
RF_Burns is currently offline  RF_Burns   Canada
Messages: 2276
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
Senior Member
Re MDS system, for $3K I would be going for a port injection system instead of TBI.

I love my EBL TBI system and would not go back to a carburetor, but it has its drawbacks. IE rough cold idle when used on a cold intake manifold.


Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
Re: [GMCnet] EFI and Timing Control [message #218570 is a reply to message #218563] Fri, 16 August 2013 09:31 Go to previous messageGo to next message
emerystora is currently offline  emerystora   United States
Messages: 4442
Registered: January 2004
Karma: 13
Senior Member
Hi Bruce

With a little fine tuning of your EBL the rough cold idle should be able to be corrected. If you go to a rally where some of us users are we can probably assist you. Or, perhaps George Beckman might give you some suggestions on the net.

Emery Stora

On Aug 16, 2013, at 7:56 AM, Bruce Hislop wrote:

>
>
> Re MDS system, for $3K I would be going for a port injection system instead of TBI.
>
> I love my EBL TBI system and would not go back to a carburetor, but it has its drawbacks. IE rough cold idle when used on a cold intake manifold.
>
> --
> Bruce Hislop
> ON Canada
> 77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
> Hubler 1 ton front end
> http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
> My Staff says I never listen to them, or something like that
> _______________________________________________
> 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: EFI and Timing Control [message #218571 is a reply to message #217729] Fri, 16 August 2013 09:39 Go to previous messageGo to next message
Loffen is currently offline  Loffen   Norway
Messages: 1087
Registered: August 2013
Location: Norway
Karma: 1
Senior Member
Yes the price is high, but it should be easy to setup, only a few connections has to be made and I am not worried about the intergrated sensors, by the look of it so should it be possible to take the complete module off if something goes wrong.

And the $ 3000 is for a complete setup with distributor, ignition control and EFI with the fuel pump and so on.

But my consern is that it do not use a knock sensor and you can not add one, maybe not a big deal, but it would for sure be nice to have the option.

What is the price for a port injection system ?


1973 23' # 1848 Sky Blue Glacier called Baby Blue and a 1973 26'-3 # 1460 Parrot green Seqouia Known as the Big Green, And sold my 1973 26'-2 # 581 White Canyon lands under the name Dobbelt trøbbel in Norway

[Updated on: Fri, 16 August 2013 09:40]

Report message to a moderator

Re: EFI and Timing Control [message #218575 is a reply to message #218563] Fri, 16 August 2013 09:46 Go to previous message
WD0AFQ is currently offline  WD0AFQ   United States
Messages: 7111
Registered: November 2004
Location: Dexter, Mo.
Karma: 207
Senior Member
rf_burns wrote on Fri, 16 August 2013 08:56

Re MDS system, for $3K I would be going for a port injection system instead of TBI.

I love my EBL TBI system and would not go back to a carburetor, but it has its drawbacks. IE rough cold idle when used on a cold intake manifold.


Bruce, I just cured the cold rough idle on my analog Holley system, with the help of Emery. I suspect your's can also be cured. Now I hit the switch and it purrs like a kitten. Never idled right cold since I had it, 9 years.
Dan


3 In Stainless Exhaust Headers One Ton All Discs/Reaction Arm 355 FD/Quad Bag/Alum Radiator Manny Tran/New eng. Holley EFI/10 Tire Air Monitoring System Solarized Coach/Upgraded Windows Satelite TV/On Demand Hot Water/3Way Refer
Previous Topic: Brake booster upgrade
Next Topic: [GMCnet] More Fun
Goto Forum:
  


Current Time: Sat May 04 20:01:10 CDT 2024

Total time taken to generate the page: 0.01878 seconds