| EFi Timing Control (Misar System) [message #285698] |
Mon, 24 August 2015 01:36  |
jturbo
Messages: 76
Registered: August 2013
Location: Socal
Karma: 1
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Efi Kit's offer Timing Control and it seems we have several options to do this.
Has anyone tried any of the below items or do you find timing control does not work?
1. Oldsmobile 455 and 403 (MSD 6al and computer distributor?)
2. Oldsmobile 403 and 455 (Oldmobile 307) 7 Pin computer control distributor (No vacuum advance)
3. Oldsmobile 403 and 455 (Oldmobile 403 Misar Crank Trigger with or without Misar control box) (Tornado 77)
4. MSD or Edelbrock Crank Trigger kit?
If you have tried these above items what are your results?
1978 Royal 403
1977 Birchaven 455
1977 Kingsley 455
All under Upgrading and restoration
Rosemead California
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| Re: EFi Timing Control (Misar System) [message #285701 is a reply to message #285698] |
Mon, 24 August 2015 02:25  |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
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jturbo wrote on Sun, 23 August 2015 23:36Efi Kit's offer Timing Control and it seems we have several options to do this.
Has anyone tried any of the below items or do you find timing control does not work?
1. Oldsmobile 455 and 403 (MSD 6al and computer distributor?)
2. Oldsmobile 403 and 455 (Oldmobile 307) 7 Pin computer control distributor (No vacuum advance)
3. Oldsmobile 403 and 455 (Oldmobile 403 Misar Crank Trigger with or without Misar control box) (Tornado 77)
4. MSD or Edelbrock Crank Trigger kit?
If you have tried these above items what are your results?
These answers relate to the answers to your six questions asked earlier.
The EBL EFI system uses #2. THe EBL spark control is integrated with fuel so it is more like modern computer controlled vehicles. For instance, when the computer deems it suitable to go into Lean Cruise (16.4 or more to 1 air fuel rather than the standard 14.7:1) the spark is advanced 4-5 degrees because lean mixtures take longer to get the fire going.
Atomic can be set up for #2 or MSD. Atomic spark control is like a distributor that is well curved and has a perfect set of weights and vacuum pot.
I think a couple of caddy engine coaches have crank trigger kits.
Knock sensors allow a more aggressive timing that is retarded when knocking is detected.
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
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| Re: EFi Timing Control (Misar System) [message #285703 is a reply to message #285701] |
Mon, 24 August 2015 02:34 |
jturbo
Messages: 76
Registered: August 2013
Location: Socal
Karma: 1
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Knock Sensor?
Which EFi supports Knock sensor?
I am installing 3 different efi kits on 3 different GMC's and trying to figure out which is best optional parts for each.
1st one is getting Holley Terminator with 307 distributor so far the plan (Fuel system not sure)
2nd one is getting Msd Atomic system (have distributor MSD and 6al but not sure if that is better or another 307 compcontrol.
3rd one Edelbrock EFI street (same issue 307 comp control or something else and fuel (edelbrock sump pump)
each of these is early on but I plan on installing each but wanted opinions of what people have installed or added etc.
1978 Royal 403
1977 Birchaven 455
1977 Kingsley 455
All under Upgrading and restoration
Rosemead California
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| Re: EFi Timing Control (Misar System) [message #285725 is a reply to message #285703] |
Mon, 24 August 2015 09:40 |
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wally
Messages: 643
Registered: August 2004
Location: Omaha Nebraska
Karma: 5
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Senior Member |
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jturbo wrote on Mon, 24 August 2015 02:34Knock Sensor?
Which EFi supports Knock sensor?
I am installing 3 different efi kits on 3 different GMC's and trying to figure out which is best optional parts for each.
1st one is getting Holley Terminator with 307 distributor so far the plan (Fuel system not sure)
2nd one is getting Msd Atomic system (have distributor MSD and 6al but not sure if that is better or another 307 compcontrol.
3rd one Edelbrock EFI street (same issue 307 comp control or something else and fuel (edelbrock sump pump)
each of these is early on but I plan on installing each but wanted opinions of what people have installed or added etc.
For integrated knock control Megasquirt 3 EFI has that as an option. http://www.msextra.com/ For windowed sensing individual cylinder retard Applied has J&S Safeguard that works stand alone. http://www.appliedgmc.com/prod.itml/icOid/1154 We have both installed. They "hear" different.
On the road Whitehorse, Yukon Ca
Wally Anderson
Omaha NE
75 Glenbrook
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