Spark Plug Selection - Team Camaro Tech
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post #1 of 9 (permalink) Old Jan 23rd, 09, 05:41 PM Thread Starter
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Chris
 
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Spark Plug Selection

As you may have read late last year i was going to change my heads on my 327 in my 69. I ended up getting a pretty sweet deal on a set of Performer RPM heads. The manual for these calls for a Champion spark plug RC-12YC, I prefer to use an AC Delco plug myself.

With these heads we calculated 9.5 CR, Im curious if this plug part number is a good start or if i should be looking at a different heat range to get started. I would like to get the right plugs the first time if possible,

If you need to know the cam/carb info i can post that to.

Hatya

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327 9.6:1, Performer RPM Heads, 200R4, 3rd Gen P/S Box
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post #2 of 9 (permalink) Old Jan 23rd, 09, 10:36 PM
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Re: Spark Plug Selection

AC R44S is what I would run, IF you have 1969 dated heads. Around 1970-71 Chevy changed to Taper-seat plugs.

Champions: never!!!

If your heads take taper-seat, then use AC R44TS.
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post #3 of 9 (permalink) Old Jan 24th, 09, 10:58 AM
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Re: Spark Plug Selection

You can't go wrong if you use the gasketed spark plug that Edelbrock recommends which in your case would be the Champion RC-12YC....They would be the correct heat range for your application....This is what I done when I was running a pair of these heads on a BBC, they burned clean and I never had a spark plug fouling problem!
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post #4 of 9 (permalink) Old Jan 24th, 09, 03:00 PM
 
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Re: Spark Plug Selection

Stupid as this sound's, I personally like Autolites!

It's as tho way back then when I worried about stuff like this, they were a schosh warmer or colder then AC's or Champions.

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post #5 of 9 (permalink) Old Jan 24th, 09, 04:17 PM
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Re: Spark Plug Selection

Quote:
Originally Posted by pdq67 View Post
Stupid as this sound's, I personally like Autolites!

It's as tho way back then when I worried about stuff like this, they were a schosh warmer or colder then AC's or Champions.

pdq67
I like Autolites also, Might look at a 4275 Autolite. I never had problems keeping them clean.

Don
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Zdld17:69 Z/RS,306, NOR141111, 9N554XXX, 12A, X3G, 59/59,723, AFR 195,CCC282/290HR, TKO 600, BU1122B1E Owner since Dec 1968

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post #6 of 9 (permalink) Old Jan 26th, 09, 07:29 AM
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Re: Spark Plug Selection

I run the E3 Diamond Fires. They are the ONLY plug I have run that actually do what they say. More power, easier starts and better idle. I swapped out my R44ts for the E3's and immediately felt an increase in power and idle quality and easier starts.

Charlie Knudsen 67 Camaro RS/SS 350 TKO 600, 4.10's, AFR 195 Street Heads, Comp 270H, Rhoads Lifters, Crane Ignition, Pertronix Dizzy, Performer RPM Q-Jet, Heavily Modified Q-Jet, Hooker Comp Headers, MagnaFlow 2 1/2", 144 Decibles(Alpine CDA-7998 Head Unit, RF X7 and RF 750X Amps, MB Quart Mid's & High's, Kicker L7 12" Solo Barics)
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post #7 of 9 (permalink) Old Jan 26th, 09, 12:01 PM Thread Starter
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Re: Spark Plug Selection

Thanks Charlie, i may switch to them at some point.

Hatya

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327 9.6:1, Performer RPM Heads, 200R4, 3rd Gen P/S Box
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post #8 of 9 (permalink) Old Jan 31st, 09, 10:46 AM
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Re: Spark Plug Selection

[quote=zdld17;1145790]I like Autolites also, Might look at a 4275 Autolite. I never had problems keeping them clean.[/quote

Last edited by loveoldchevys; Jan 31st, 09 at 11:10 AM.
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post #9 of 9 (permalink) Old Jan 31st, 09, 11:13 AM
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Re: Spark Plug Selection

I am looking for a better spark plug, I have a 68 Camaro RS, 327 / 275 with a small cam, Holley intake , Holley 750 Daul line carb and still using points in the Dist. Would you recommond the Autolite 4275 spark plug for this engine.
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