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Bizarre twin plug set up ??
Purchased an 1982 targa without any background info. Can anyone help me identify this bizarre twin plug set up? It has twin MSD. Car runs good now but the (rear?) Distributor will need a new belt soon and I have no clue where to ascertain one of those puppies.
 
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06-01-2014, 05:51 AM
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Banned
Join Date: May 2005
Location: Earth
Posts: 31,744
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Could it just be a single plug with an extra msd in case of failure? I only see one coil. And that black thing in the first picture only has 4 terminals, not 6.
Does it actually have 12 plugs? |
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06-01-2014, 06:23 AM
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I would rather be driving
Join Date: Apr 2000
Location: Austin, TX
Posts: 9,108
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There was a thread years ago about cam driven twin plug setups. Search for Grady Clay's response on the subject.
In a way its a "hidden" twin plug setup.
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Jamie - I can explain it to you. But I can not understand it for you. 71 911T SWT - Sun and Fun Mobile 72 911T project car. "Minne" - A tangy version of tangerine #projectminne classicautowerks.com - EFI conversion parts and suspension setups. IG Classicautowerks |
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06-01-2014, 06:25 AM
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Quote:
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06-01-2014, 06:33 AM
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Quote:
 This pic shows the second coil |
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06-01-2014, 02:47 PM
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Wow, cool setup!
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2001 Boxster S 1984 Carrera 1976 912e 1993 968 1986 944 Turbo |
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06-01-2014, 05:21 PM
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It set like old airplane engine .Double ingition .
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06-02-2014, 02:15 AM
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I don't see it. Where is the 2nd coil?
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Bavaria911 1970 911T w/ 2.4S 1971 911T Targa w/ 2.2 RG Member # 818 |
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06-02-2014, 03:14 AM
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Its up on the side on the right - black, kinda stealthy.
I have heard of these set ups but I cant remember where I read about them. I wonder if the belt that drives the 2nd dizzy will even be available? Maybe its just an MFI belt?
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erik.lombard@gmail.com 1994 Lotus Esprit S4 - interesting! 84 lime green back date (LWB 911R) SOLD  RSR look hot rod, based on 75' SOLD 73 911t 3.0SC Hot rod Gulf Blue - Sold. |
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06-02-2014, 03:17 AM
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resident samsquamch
Join Date: Oct 2005
Location: Cooterville, Cackalacky
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Quote:
 
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-jeff back in the saddle: '95 993 - just another black C2 *SOLD*: '87 930 GP White - heroin would have been a cheaper addiction... "Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP )
Last edited by sand_man; 06-02-2014 at 05:28 AM.. |
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06-02-2014, 05:22 AM
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Some more photos
From the under side
 From the top side in the back 
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06-02-2014, 04:31 PM
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Two more from the top side
 
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06-02-2014, 04:34 PM
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Max Sluiter
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MFI belts are wider than that. You might be able to find something from Gates on McMaster-Carr or SDP/SI that would fit as a replacement. Have fun changing it though.
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1971 911S, 2.7RS spec MFI engine, suspension mods, lightened Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance |
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06-02-2014, 05:06 PM
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Yeah it looks like they clearanced the shock mount cross bar with a BFH. Looks like something I would do. I think I can see some numbers on the belt i n one of the pics, maybe if you can get it off you could source it. I would be scared to lose the timing if I took it off with the motor installed.
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erik.lombard@gmail.com 1994 Lotus Esprit S4 - interesting! 84 lime green back date (LWB 911R) SOLD RSR look hot rod, based on 75' SOLD 73 911t 3.0SC Hot rod Gulf Blue - Sold. |
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06-02-2014, 06:06 PM
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Less brakes, more gas!
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My concern would be the changes in timing over time as the belt wears and stretches out. How do you tension it? what tension do you set it at if its adjustable? Note there is no belt on the 962... Interesting setup...
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 Michael '82 Euro SC 'Track Rat' 22/29 Hollows, 22/22 Tarrets, Full ERPB F/R, Rennline Tri Brace, Glass bumpers, Pro 2000's, 5 pts, blah blah blah '13 Cayenne GTS |
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06-03-2014, 09:17 AM
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I would rather be driving
Join Date: Apr 2000
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I have tried and tried to find the previous post on the subject. I can't seem to find it but I know its there.
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Jamie - I can explain it to you. But I can not understand it for you. 71 911T SWT - Sun and Fun Mobile 72 911T project car. "Minne" - A tangy version of tangerine #projectminne classicautowerks.com - EFI conversion parts and suspension setups. IG Classicautowerks |
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06-03-2014, 09:23 AM
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Join Date: Oct 2005
Location: Cooterville, Cackalacky
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Not to hijack in any way as I realize the OP's second dizzy is being driven by a belt via cam, but I thought I would share these pics. Several years ago, Neil Harvey of Performance Developments (a premier 956 and 962 engine builder) was handling all of the machine work on my 930 engine. I decided to go twin plug. This was one of the options he mentioned. Obviously borrowed from his years with the 962 engine:
    
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-jeff back in the saddle: '95 993 - just another black C2 *SOLD*: '87 930 GP White - heroin would have been a cheaper addiction... "Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP )
Last edited by sand_man; 06-03-2014 at 09:59 AM.. |
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06-03-2014, 09:55 AM
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resident samsquamch
Join Date: Oct 2005
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^^^this dizzy would have been attached to the turbo oil scavenge pump, which runs off of the driver's side cam.
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-jeff back in the saddle: '95 993 - just another black C2 *SOLD*: '87 930 GP White - heroin would have been a cheaper addiction... "Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP )
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06-03-2014, 09:57 AM
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Really cool!
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Magnus 911 Silver Targa -77, 3.2 -84 with custom ITBs and EFI. 911T Coupe -69, 3.6, G50, "RSR", track day. 924 -79 Rat Rod EFI/Turbo 375whp@1.85bar. 931 -79 under total restoration. |
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06-03-2014, 12:53 PM
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06-03-2014, 03:37 PM
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Salt and Pepper the new daily driver
Number 3
Number 2
Number 1
82 Slant
Panel Truck
The Z
Vette SOLD!
The Daily driver. SOLD!
1970 Porsche 911 T
1971 Targa 911T
1971 Porsche 911S
Ugly Betty
1977 Porsche 911 Targa 2.7s
