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Topic: Spark plug selection

in Forum: C3 Engines


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Spark plug selection (1/4)
 9/11/11 8:16pm
rod7515Lifetime Member
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Red Lion, PA - USA

Vette(s):
1974 White 350 Corvette, TH400 Automatic 1972 Tangerine /Go Mango Convertible 383 Stroker, 2004r Automatic


Joined: 10/27/2006
Posts: 1182

Well I hope to get the motor dropped in sometime in the next week. I am putting in a 383 stroker bored .040 with 9.5 - 1 compression. I have a set of world sportsman II heads and a hydraulic .490 lift cam. I will be running a set of Headman headers and a edelbrock performer  intake with a 750 Holley/vacuum secondary's. It will have a 2800 stall converter and a bowtie 2004r trans with 355 gears. I am wondering what plugs you would run. I have always been a Champion guy. Would you run 1 or 2 ranges colder plug? Has anyone tried those Acel plugs that are supposed to be shorter for header clearance? How many of you are die hard AC plug users? I plan on driving this car on highways as well as in town. Its not a trailer queen!
Rodney

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Re: Spark plug selection (2/4)
 9/11/11 8:19pm
rod7515Lifetime Member
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Red Lion, PA - USA

Vette(s):
1974 White 350 Corvette, TH400 Automatic 1972 Tangerine /Go Mango Convertible 383 Stroker, 2004r Automatic


Joined: 10/27/2006
Posts: 1182

Hey what happened to my signature pics?they dont show up with my post!
Rodney


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Re: Spark plug selection (3/4)
 9/11/11 10:41pm
lukesvetteLifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.


Joined: 5/18/2004
Posts: 6812

Rod, I think this is another bug for Adam to check. I noticed on a recent post that I started, the starter in the thread dropped the signature.

As for plugs, I am currently running Bosch Platinums and I likum!! Thumbs Up
Re: Spark plug selection (4/4)
 9/17/11 7:02am
nosal1
Former Member

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Dunedin, FL - USA

Vette(s):
1980 Corvette Torch Red with Gold metallic 370HP/350 CU.IN.Turbo 350 w/shift kit.Originally CA.Car with 305 CU.IN.


Joined: 3/21/2006
Posts: 262

Good morning to you.Regarding your spark plug choice may I suggest you use the Accel P/N 576 especially with headers..I have many 383's I have built and have had great success with these plugs in my Vette and others. The 576 plugs are shorter for use with headers and are equal to AC44TS and AC 45TS,both of which are street plugs..If you plan to be on the track racing or on the freeways constantly then you can go to a colder plug like AC43 or 42,but prepare for loading up unless you are full bore with you hair on fire....Go with the Accel 576 header plug set gap at .045 for OEM HEI distributor and if you have the points style distributor with Pertronix electronic system set plugs at .042..God luck and motoring.. Sal C

       

        

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