Twin plug /4, ROI? |
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Twin plug /4, ROI? |
r_towle |
Feb 17 2018, 04:13 PM
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#1
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
Has anyone done testing to understand the Net difference between single and twin plug on a /4?
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914work |
Feb 18 2018, 05:05 PM
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#2
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Member Group: Members Posts: 291 Joined: 9-November 11 Member No.: 13,762 Region Association: None |
The 914/4 combustion chamber is a modified wedge style design which compresses (squashes) the air-fuel mixture toward the [existing] spark plug. Adding a second plug may have some advantage but not as much as the 911's hemispheric combustion chamber which benefits from 2 points of ignition. This is where a skilled welder/machinist a flow bench, a mule motor & significant time would prove beneficial. The ROI...well Im sure that is purely subjective. The old joke/riddle: "How do you make a small fortune?" comes to mind. The vendor to which Peteyd refers claims to have "built" multiple permutations until finding the best combination of mods. I think that Len's contributions cant be understated here. (IMG:style_emoticons/default/sunglasses.gif) |
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