 Engine Relay Board for my 914-6 Conversion |
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| Tom1394racing |
 Sep 25 2023, 08:55 AM
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#1
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Member  Group: Members Posts: 283 Joined: 25-August 07 From: CT Member No.: 8,039 Region Association: North East States  |
I am converting a 1973 914-2.0 to a 914-6 GT Tribute car. The build thread is located here:
http://www.914world.com/bbs2/index.php?sho...=358279&hl= My question concerns the engine relay board. I understand that the 914-6 relay board is different than the 914-4 board. I will be using a new 914-6 wiring harness including a new engine harness from Restoration Design. The engine will be a carbureted 3.2 short stroke with twin plug MDS system. I am guessing that I can modify the 914-4 relay board to work with the -6 wiring harness and avoid having to locate a -6 relay board. Has anyone done this? Could someone point me to a person or thread that will help me? |
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| Root_Werks |
Sep 25 2023, 08:59 AM
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#2
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Village Idiot Group: Members Posts: 8,321 Joined: 25-May 04 From: About 5NM from Canada Member No.: 2,105 Region Association: Pacific Northwest 
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It's been a while, If I remember correctly, you can use the 4cyl board and harness. Just take the harness apart and configure as needed.
Last couple of six conversions, just eliminated the board. Even with my CIS, it's not needed. |
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| Mikey914 |
Sep 25 2023, 09:51 AM
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#3
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The rubber man Group: Members Posts: 12,669 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None
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If you haven’t purchased, RD should be able to accommodate the change.
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| Luke M |
Sep 25 2023, 02:03 PM
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#4
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Senior Member Group: Members Posts: 1,372 Joined: 8-February 05 From: WNY Member No.: 3,574 Region Association: North East States
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Hi Tom,
Depends on what you are after but there's really no need for the relay board. When I did my brothers 3.0 6 conversion we omitted the relay board. If you have an internal voltage reg on your alternator and relocating the fuel pump up front then there's no need for the board. Cleans up the engine bay too and makes changing the oil filter a little easier. Just get a male 911 14 pin connector wire as need and good to go. See pic of my brother's install. Also the relay that you see in the pic is a hot start relay. Attached image(s) 
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| Tom1394racing |
Sep 25 2023, 04:02 PM
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#5
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Member Group: Members Posts: 283 Joined: 25-August 07 From: CT Member No.: 8,039 Region Association: North East States |
The harness is wired for the fuel pump up front. I am planning on using a rebuilt 35 amp Bosch alternator that will be externally regulated. I am thinking of using one of the mini solid state voltage regulators.
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| mlindner |
Sep 26 2023, 05:22 AM
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#6
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Senior Member Group: Members Posts: 1,521 Joined: 11-November 11 From: Merrimac, WI Member No.: 13,770 Region Association: Upper MidWest
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Yup as root works said, just eliminate. I had Perry Kiehl make a new engine harness, deleted relay board, added MSD...all worked great. Best, Mark
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| Steve |
Sep 26 2023, 08:06 AM
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#7
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914 Guru Group: Members Posts: 5,587 Joined: 14-June 03 From: Orange County, CA Member No.: 822 Region Association: Southern California
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(IMG:style_emoticons/default/agree.gif)
Most people dump the relay board. The relay board has the following: 1. Heater fan - Don't need 2. Regulator - Most sixes have an internal regulator 3. Rear Window defroster - Do you have one? 4. Fuel pump - Easy to wire an external fuel pump relay. |
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| 930cabman |
Sep 26 2023, 09:05 AM
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#8
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Advanced Member Group: Members Posts: 3,064 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States
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QUOTE(Root_Werks @ Sep 25 2023, 08:59 AM)  It's been a while, If I remember correctly, you can use the 4cyl board and harness. Just take the harness apart and configure as needed. Last couple of six conversions, just eliminated the board. Even with my CIS, it's not needed. Exactly what I was planning, it looks straightforward to clean things up and make filter changes much easier for sure. |
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