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| Registered Join Date: Jan 2003 Location: Langley,B.C. 
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				Which spark plug??
			 
			What plug should I use in this motor. 3.4 Twin plug 10.5CR mod S cams ITB's headers (1 5/8) Thanks 
				__________________ Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 | ||
|  06-06-2006, 04:18 PM | 
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| 3 restos WIP = psycho Join Date: Feb 2005 Location: North of Exit 17 
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			I assume the 2nd plug was machined standard, not undersized?
		 
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|  06-06-2006, 04:28 PM | 
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| Registered Join Date: Jan 2003 Location: Langley,B.C. 
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			Standard 14mm plug, top and bottom. Cheers 
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|  06-06-2006, 04:57 PM | 
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| Super Moderator | 
			I'm really happy with my NGK's... I can't remember the number, but I use the 14mm as well with nearly the same motor... R-587 something I think... I had to switch away from the projected tip style when I upgraded from 3.0 to 3.3L I have some back at the garage and can check the numbers when I get back if you want. 
				__________________ Chris ---------------------------------------------- 1996 993 RS Replica 2023 KTM 890 Adventure R 1971 Norton 750 Commando Alcon Brake Kits | ||
|  06-06-2006, 07:32 PM | 
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| Registered | 
			Chris what about going 3.3 meant no preojected tip?  I assume its because of the high comp pistons and clearance? Bosch, NGK, cant really go wrong with either because you can order pretty much whatever you want from both. What setup are you using for your ignition? 
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|  06-06-2006, 08:02 PM | 
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| Registered Join Date: Jan 2003 Location: Langley,B.C. 
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			I guess I should have asked about heat range! oops.  I have always had good luck with NGK's but just not sure on which one for this new motor. Cheers 
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|  06-06-2006, 09:29 PM | 
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| Super Moderator | 
			Pkid, it was a suprise to me too, because I had 95mm 10.5:1's prior and a visual inspection of the new piston made it look like they were the same height and dome shape.  However the projected tip style were JUST hitting the plug at TDC right at the edge of the exhaust valve pocket.   The non-projected tp gave me a few mm clearance. Jeff, I originally used the 9 heat range (which in NGK parlance is cold) but got some fouling at idle and had hard starts. I moved to 8 and haven't had an issue since. 
				__________________ Chris ---------------------------------------------- 1996 993 RS Replica 2023 KTM 890 Adventure R 1971 Norton 750 Commando Alcon Brake Kits | ||
|  06-07-2006, 04:48 AM | 
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| Registered Join Date: Jan 2003 Location: Langley,B.C. 
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			Chris, thanks, I would be interesred in the numbers. Cheers 
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|  06-07-2006, 07:38 AM | 
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| Navin Johnson Join Date: Mar 2002 Location: Wantagh, NY 
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			Have had success with these  NGK R5671A- 8 
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|  06-07-2006, 12:20 PM | 
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| Registered Join Date: Jan 2003 Location: Langley,B.C. 
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			Thanks Tim, so you think that would be okay with my motor configuration? Thanks 
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|  06-07-2006, 12:32 PM | 
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| Registered | 
				
				good timing
			 
			This thread has come about at a wonderful time.  Now I am second guessing the plugs I went with.  Chris are you running the 100mm JE's with 10.5:1?  I currently have Bosch plugs in there top and bottom and when I checked deck height I forgot to put in the lower plugs.  Silly mistake I know.   Any reason why you went with NGK over Bosch? Jeff saw youve got the longblock together, recieved any electronics yet? 
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|  06-07-2006, 01:20 PM | 
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| Registered Join Date: Feb 2002 Location: Central NJ 
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			As a point of reference... 3.2l with 11:1 Cosworth pistons, twin plugged using Electromotive modules, cam is similar to a GE80 (but from Elgin), 1 5/8 headers, ported and 46IDAs. Car came with NGKs BPP9Es but was fouling plugs. Ended up going to BP7ES (hotter) and it seems to run great! It is equivalent to a Bosch W5DC. Lou 
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|  06-07-2006, 03:51 PM | 
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| Registered Join Date: Jan 2003 Location: Langley,B.C. 
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			I run/ran NGK 7's in it when it was a 3.2 with 964 cams with no problems. Thanks, keep the tips comming! Cheers 
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|  06-07-2006, 05:56 PM | 
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| Registered Join Date: Jan 2003 Location: Langley,B.C. 
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			Chris, I put the old standard NGK's in tonight (with a very huge gap for this test) and turned the engine over a bunch of times.  The piston never hit the plug, am I okay with the standard style plugs or should I get the ones like you have? Cheers 
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|  06-07-2006, 09:44 PM | 
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| Super Moderator | 
			Jeff, I'm using the same ones that TimT has above. Had great luck with them so far. (Tim, did you find them at your local place?). FWIW I get them at the local NAPA for about $1.29 apeice! I chose NGK over Bosch because that's what Richard Clewett recommended when I originally go the Electromotive setup from him. Since they work well enough, I never saw any reason to change to Bosch, even if they are from the fatherland... Jeff, as long as you have clearance, you're fine. In fact I'd prefer the projected tip for 2 reasons. First you lose a little more compression with the recessed version and second, the recess doesn't stick out into the combustion chamber as well so I assume ignition is a little harder. Since I switched from 95mm to 100mm I'm mixing in race gas on 90+ degree days to be on the safe side... 
				__________________ Chris ---------------------------------------------- 1996 993 RS Replica 2023 KTM 890 Adventure R 1971 Norton 750 Commando Alcon Brake Kits | ||
|  06-08-2006, 05:33 AM | 
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| Registered Join Date: Jan 2003 Location: Langley,B.C. 
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			Thanks guys! Cheers 
				__________________ Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 | ||
|  06-08-2006, 08:59 AM | 
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| Addicted to Racing | 
			Here is another vote for the BP 7 Es's. Have them in both cars. Both twin pluged. Thanks Ed 
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|  06-08-2006, 09:11 AM | 
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| Registered Join Date: Jun 2001 Location: Sweden 
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			Use NGK 7:s or even 6:es. 9:es are way too cold and fit for turbocharged cars running on track. They foul on street. BP7ES is OK.
		 
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|  06-08-2006, 12:56 PM | 
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			I'm using a W4CS with a similar set up. 46mm Webers instead of ITB's. On a different note, I see your looking for for an open trailer. Have you checked out this trailer place. It's in Parksville, BC. I'm looking for an aluminum trailer and their prices seem pretty reasonable. http://www.expresstrailer.com/a-car.htm 
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|  06-09-2006, 06:49 AM | 
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| Registered Join Date: Jan 2003 Location: Langley,B.C. 
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			Hmmm, no I had not. I will check them out. Cheers 
				__________________ Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 | ||
|  06-09-2006, 07:26 AM | 
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