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904svo |
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#1
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904SVO ![]() ![]() ![]() Group: Members Posts: 1,119 Joined: 17-November 05 From: Woodstock,Georgia Member No.: 5,146 ![]() |
While trying to make the jigs to drill my heads for twin plugs I ran into a
major problem. Where is the plug going to be located on the bottom of the head. I made up this jig to located where the plug will be located. Angle jig ![]() Test jig installed ![]() Installed ![]() Bottom view ![]() |
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ME733 |
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#2
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Senior Member ![]() ![]() ![]() Group: Members Posts: 842 Joined: 25-June 08 From: Atlanta Ga. Member No.: 9,209 Region Association: South East States ![]() |
.I think that , based on some old 4-cam carrera information., a twin plug engine -a type 4-engine, could see a 5-to 15 percent increase in H.P....the more radical the engine the higher H.P. potential.-to a 15% increase....MM
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Dave_Darling |
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#3
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914 Idiot ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 15,000 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California ![]() ![]() |
.I think that , based on some old 4-cam carrera information., a twin plug engine -a type 4-engine, could see a 5-to 15 percent increase in H.P....the more radical the engine the higher H.P. potential.-to a 15% increase....MM In the 911 engines, going dual-plug generally lets you run about one full point more of compression on the same grade of fuel without detonation. A fair bit of the extra power comes from the extra compression, from what I can tell. The 914 chambers are very different from the 911 ones; not sure how much (if any?) more compression you can run in them. --DD |
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