Spark Plug Look Correct to You? - Team Camaro Tech
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post #1 of 10 (permalink) Old Nov 16th, 12, 10:04 AM Thread Starter
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Charlie
 
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Spark Plug Look Correct to You?

My new ride with a 383 Stroker has a stall as you lift the clutch coming out of first gear (RPM's fall off and it dies unless you really gas it) and given I have never seen spark plugs where the top didn't come fully over the plug, I just wanted to know what you guys thought of these Autolites. It just doesn't look right to me and that's how all 8 of them look.

Charlie
Edmonds, WA
1969 Camaro SS Vert LS1 T56

Last edited by camaromaniac; Mar 16th, 14 at 03:48 PM.
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post #2 of 10 (permalink) Old Nov 16th, 12, 10:19 AM
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Marc
 
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Re: Spark Plug Look Correct to You?

What is the part #?
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post #3 of 10 (permalink) Old Nov 16th, 12, 10:32 AM Thread Starter
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Charlie
 
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Re: Spark Plug Look Correct to You?

Quote:
Originally Posted by SS69Cam View Post
What is the part #?
Autolite
AR12

Thanks

Charlie
Edmonds, WA
1969 Camaro SS Vert LS1 T56
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post #4 of 10 (permalink) Old Nov 16th, 12, 11:23 AM
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Re: Spark Plug Look Correct to You?

What plugs does the head mfg recommend?

What are the cam specs. There was another recent thread with somewhat of the same symptoms and the cam operating range I think started @ 2500 RPM or 3500RPM.

Last edited by satz28; Nov 16th, 12 at 06:34 PM.
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post #5 of 10 (permalink) Old Dec 5th, 12, 04:21 PM
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Re: Spark Plug Look Correct to You?

too blurry to tell?


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post #6 of 10 (permalink) Old Dec 5th, 12, 04:44 PM
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Re: Spark Plug Look Correct to You?

The gap appears to be a bit wide unless that's merely due to the unfocused picture.
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post #7 of 10 (permalink) Old Dec 5th, 12, 10:17 PM Thread Starter
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Charlie
 
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Re: Spark Plug Look Correct to You?

Actually, I did a further search and it turns out these are correct and used a lot in racing!

Charlie
Edmonds, WA
1969 Camaro SS Vert LS1 T56
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post #8 of 10 (permalink) Old Dec 5th, 12, 11:45 PM
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Tim
 
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Re: Spark Plug Look Correct to You?

Quote:
Originally Posted by cnorton7311 View Post
The gap appears to be a bit wide unless that's merely due to the unfocused picture.
I thought the same, although it's hard to tell from the blurriness..... But would certainly check and adjust gap (if required).
Have you recently changed the plugs, or have you done anything else to the engine? Has it got worse with the onset of Winter? Could be a carb bog, rather than the plugs.

1969 04A Van Nuys-built Z/28. Cortez Silver with dark blue interior and VE3. Sold Clippinger Chevrolet. Raced at Lions in LA.
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post #9 of 10 (permalink) Old Dec 6th, 12, 01:39 PM
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Re: Spark Plug Look Correct to You?

Was thinking along the line of carb issues, sound like a flat spot from off idle to power transition. I would look at pump squirter sizes, position of the cam lever, etc. AR12 is a cold plug. Try AR 42 for street.

Don
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post #10 of 10 (permalink) Old Dec 6th, 12, 08:46 PM
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Re: Spark Plug Look Correct to You?

I also suspect the carb. The best picture to provide for reading the plug would be looking down on the face of it to be sure. However, to me it looks like your ground strap is black. Sooty strap is too rich. Should be the same toasted marshmallow color as the face of the plug (surface of the last thread that sees the flame). Also the color transition on the strap should be just beyond the bend of the ground strap running back to the plug body. This aspect indicates proper heat range.

1969 Camaro 383
2.02/1.63 & 234/244 Vortec
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