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bahnzai's Avatar
 
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Twin Plug machining - who did you guys use?

Twin Plug machining for your heads & valve covers- who did you guys use and what ball park should I expect the cost to be?
Thanks in advance for any advice!
dt
Old 07-06-2008, 12:03 PM
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Im going to use Verdan Machine in Dover, NJ. They did all of my refurbishing and Ive seen their twin plug jobs- very nice.
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Old 07-06-2008, 03:52 PM
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EBS did mine. They machine it for a smaller plug to save material (or so they say). I want to say it was about $500.
Old 07-06-2008, 04:03 PM
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Old 07-06-2008, 06:04 PM
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I use the fellow local to me who does all my heads. Fantastic work, great prices. The dealer and all the independants use him. Haywardperformance.com


Cheers
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Old 07-06-2008, 10:05 PM
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cgarr on this board. he is in MI as uses 12mm to save material as well. can't remember cost but very very inexpensive. PM him for a quote
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Old 07-07-2008, 04:04 AM
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my heads being done in Neil's shop:







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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)
Old 07-07-2008, 05:23 AM
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Old 07-07-2008, 05:29 AM
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The actual cost for the twin-plug machine work is not very expensive in the big picture; it's the cost(s) of how you fire the second set of plugs that gets expensive...
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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)
Old 07-07-2008, 05:32 AM
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Quote:
Originally Posted by sand_man View Post
The actual cost for the twin-plug machine work is not very expensive in the big picture; it's the cost(s) of how you fire the second set of plugs that gets expensive...

What did you mean by that?
Old 07-07-2008, 06:34 AM
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Quote:
Originally Posted by osiris2600 View Post
What did you mean by that?
Just having the heads drilled for an extra set of spark plugs does not, in and of itself, create a fully functioning twin-plug engine. Obviously the stock ignition system will only fire six spark plugs...so one needs to determine what ignition system will be utilized to fire all twelve spark plugs. It can get expensive - money being a relative term.
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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; 07-07-2008 at 07:41 AM..
Old 07-07-2008, 06:40 AM
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My latest project involving ignition:
JB Racing 12 point ignition distributor: $1,500
JB Racing spark plug wires (don't forget you need 12): $380
MSD 6AL CDI boxes: 2 @ $220 = $440
MSD Blaster SS coils: 2 @$43 = $86

All of this is in addition to the money spent on the machine work...
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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)
Old 07-07-2008, 06:47 AM
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Quote:
Originally Posted by sand_man View Post
Just having the heads drilled for an extra set of spark plugs does not, in and of itself, create a fully functioning twin-plug engine. Obviously the stock ignition system will only fire six spark plugs...so one needs to determine what ignition system will be utilized to fire all twelve spark plugs. It can get expensive - money being a relative term.
Quote:
Originally Posted by sand_man View Post
My latest project involving ignition:
JB Racing 12 point ignition distributor: $1,500
JB Racing spark plug wires (don't forget you need 12): $380
MSD 6AL CDI boxes: 2 @ $220 = $440
MSD Blaster SS coils: 2 @$43 = $86

All of this is in addition to the money spent on the machine work...
Gotcha..
Old 07-07-2008, 07:47 AM
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Quote:
Originally Posted by sand_man View Post
My latest project involving ignition:
JB Racing 12 point ignition distributor: $1,500
JB Racing spark plug wires (don't forget you need 12): $380
MSD 6AL CDI boxes: 2 @ $220 = $440
MSD Blaster SS coils: 2 @$43 = $86

All of this is in addition to the money spent on the machine work...
Sandman, what's the cost of a replacement cap/rotor for the JB Racing distributor?

Just wondering if the Burnbros E-type cap/rotor conversion for the stock dizzy would be more cost-effective...
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Old 07-07-2008, 10:28 AM
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Quote:
Originally Posted by spuggy View Post
Sandman, what's the cost of a replacement cap/rotor for the JB Racing distributor?

Just wondering if the Burnbros E-type cap/rotor conversion for the stock dizzy would be more cost-effective...
The replacement rotor is $70.50 and the cap is $127.50.

I just asked JB Racing today, how long they thought these parts would last, and Mike Bruns indicated they're on their third season (race car) without needing a replacement. He seemed to think it would be a long while in my daily driver before I needed replacement parts. According to Mike, it's usually the rotor that gets fried if a customer wires the dizzy wrong or if a wire comes loose from the cap and starts arcing.
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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)
Old 07-07-2008, 11:08 AM
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Even with the Burn Brothers option, I still think the stock dizzy needs to be modified and re-curved. From what I recall, Henry Schmidt of Supertec Performance handles this and it's about $1,250 (working from memory as it was a couple of years ago), and I think you provide your dizzy as the core.
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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; 07-07-2008 at 11:17 AM..
Old 07-07-2008, 11:11 AM
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Quote:
Originally Posted by sand_man View Post
Even with the Burn Brothers option, I still think the stock dizzy needs to be modified and re-curved. From what I recall, Henry Schmidt of Supertec Performance handles this and it's about $1,250 (working from memory as it was a couple of years ago), and I think you provide your dizzy as the core.
not anymore they made a complete casting now. but not sure on price
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Current project 73 914-6 Gt project rusteration 2.4
Reproduction 914-6 oil tanks, 1-5/8" 914-6 heat exchangers source call 2623647426 or email mbconsulting21 @gmail.com
Old 07-07-2008, 11:18 AM
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Quote:
Originally Posted by mb911 View Post
not anymore they made a complete casting now. but not sure on price

Good to know, Ben! Thanks for the correction!!!
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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)
Old 07-07-2008, 11:20 AM
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Sand_man,
what made you choose a distributor ignition vs. distributorless?
Old 07-07-2008, 03:04 PM
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I use Bill at Xtreme Cylinder heads. He is about as good as it gets in the Porsche world. He does my modular heads on my twin turbo cobra as well. His work in on another level, and his pricing is not that bad either. I run the Jb racing 12 plug distributor with two msd digital 6 ignitions, and two HVC coils. I would say I have about 3K in my ignition alone. My JB cap has a button on one of the spark plug terminals that keeps falling out. Not sure how long they will last on a car that has the plug wires taken off that often. Maybe I got a lemon cap.
Old 07-07-2008, 03:42 PM
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