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Re: [GMCnet] hei cap orientation [message #328398 is a reply to message #328397]

Sat, 20 January 2018 10:48

James Hupy

Messages: 6806
Registered: May 2010

Karma:

Senior Member

Trevor, as there are numerous fuel injection systems out there, I cannot be
too specific, BUT, in the case of the Howell system with the Embedded
Locker Circuit or EBL, there is a 7 pin electronic module in the
distributor, and all advance changes take place within the computer, and
NOT the distributor. So, what I cautioned you about vacuum and mechanical
advance doesn't apply to your situation. Base timing IS critical, however,
as the computer needs a starting point to work from. Some BIN files use 0°
base timing, and some use 8°-10° base timing. I don't know exactly what you
have, so I cannot be certain. If your plug wires are on the correct plugs
and corresponding cap connections, it matters very little what the
distributor orientation is. Pretty much, if the primary wiring harness fits
the cap connections, it should work well where you have it now.
The only distributor that I ever saw that mattered where it was
oriented was the old air cooled VW with the upright fan housing. The number
3 plug wire was retarded 9° from the other plugs to compensate for the heat
from the oil cooler that flowed over the number 3 cylinder. The cam that
opened the points was ground with a 9° retard. If you put the distributor
in wrong, number 3 would run hot. Many people who worked on air cooled VW's
did not know that. VW eventually moved the oil cooler and supplied it with
a different source of cooling air to correct that on the bus engines with
upright fan housings. The pancake engines used remote oil coolers, so they
did not retard number 3.
Jim Hupy
Salem, Or

On Jan 20, 2018 2:03 AM, "Rob Mueller" wrote:

> Trevor,
>
> Comparing your photo and this photo I agree:
>
> http://www.gmcmhphotos.com/photos/gary-rockwell-aluminum-
> intake-manifold-installation/p44402-running.html
>
> The power connection on your dizzy is rotated 90 degrees counter clockwise
> as compared to the dizzy above.
>
> However, if the plug wires are connected to the correct plug as per the
> maintenance manual I don't think it makes a difference?
>
> Regards,
> Rob M.
> The Pedantic Mechanic
> Sydney, Australia
> AUS '75 Avion - The Blue Streak TZE365V100428
> USA '75 Avion - Double Trouble TZE365V100426
> USA '77 Kingsley - TZE 267V100808
>
>
> -----Original Message-----
> From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of
> Trevor Pordage
> Sent: Saturday, January 20, 2018 4:55 PM
> To: gmclist@list.gmcnet.org
> Subject: Re: [GMCnet] hei cap orientation
>
> Thanks James
>
> just to correct a few things i had a better look today and it appears
> that i am only 90 degrees out
> my setup has no vacuum advance as it is running EFI with electronic spark
> control
> i have no knowledge of efi or these hei distributors so i am trying to
> find out how this all fits together
> here is a link to a photo http://www.gmcmhphotos.com/
> photos/uploads/42104/20180120_140014.jpg
> as this was running correctly previously i do not want to touch it but i
> would like to be able to understand why it is set up this way i assume by
> your response below that this dist was installed incorrectly and rather
> than remove and reinstall the wires were just relocated and therefore the
> cap numbers do not match the plug numbers
>
>
>
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[Message index]

		hei cap orientation By: cadelec on Thu, 18 January 2018 23:10
		Re: hei cap orientation By: Ken Burton on Fri, 19 January 2018 04:25
		Re: hei cap orientation By: cadelec on Fri, 19 January 2018 16:18
		Re: hei cap orientation By: Ken Burton on Fri, 19 January 2018 17:16
		Re: hei cap orientation By: Matt Colie on Fri, 19 January 2018 07:24
		Re: [GMCnet] hei cap orientation By: ljdavick on Fri, 19 January 2018 14:31
		Re: [GMCnet] hei cap orientation By: Ken Henderson on Fri, 19 January 2018 07:34
		Re: [GMCnet] hei cap orientation By: James Hupy on Fri, 19 January 2018 17:39
		Re: [GMCnet] hei cap orientation By: cadelec on Fri, 19 January 2018 23:54
		Re: [GMCnet] hei cap orientation By: USAussie on Sat, 20 January 2018 04:02
		Re: [GMCnet] hei cap orientation By: James Hupy on Sat, 20 January 2018 10:48
		Re: hei cap orientation By: JohnL455 on Fri, 19 January 2018 09:04
		Re: hei cap orientation By: JohnL455 on Fri, 19 January 2018 09:05
		Re: [GMCnet] hei cap orientation By: jimk on Fri, 19 January 2018 13:46
		Re: hei cap orientation By: Ken Burton on Sat, 20 January 2018 11:00
		Re: hei cap orientation By: RF_Burns on Sat, 20 January 2018 11:42
		Re: hei cap orientation By: cadelec on Sat, 20 January 2018 16:08
		Re: [GMCnet] hei cap orientation By: jimk on Sat, 20 January 2018 17:21
		Re: [GMCnet] hei cap orientation By: cadelec on Sat, 20 January 2018 18:42
		Re: [GMCnet] hei cap orientation By: cadelec on Sat, 20 January 2018 19:40
		Re: hei cap orientation By: RF_Burns on Sat, 20 January 2018 20:18
		Re: hei cap orientation By: RF_Burns on Sat, 20 January 2018 20:53
		Re: [GMCnet] hei cap orientation By: jimk on Sun, 21 January 2018 13:30
		Re: hei cap orientation By: cadelec on Tue, 23 January 2018 01:19

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