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Any rcomendations for a spark plug. Vortec GM iron heads,mild Comp Cam, stock q jet carb,automatic(agh). Plugs must be able to do 190 MPH,HA!
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Most of the people like to stay with the AC plugs...unfortunately they start breaking up at around 180 mph..........
corvette440hp
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R
Lifetime Member
Send PMHOWELL, NJ - USA
Joined: 5/18/2004
Posts: 6812
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.
AC or Bosch is what I've used.
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A/C... great plugs
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r
Former Member
Send PMBladenboro, NC - USA
Joined: 1/22/2006
Posts: 1058
Vette(s): 1972 conv., sunfire yellow, blk interior, blk vinyl and convertible top. Off frame restoration with American Speed 383 stroker engine producing 500hp plus a 200hp NOS system. MSD ignition. Hooker super competition headers with chambered exhaust.
I agree that AC is a good plug but I prefer the Bosh platinum plus 4. They seem to last longer and burn cleaner.
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My mistake in the question.I was looking for a # regardless of brand name.
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Edelbrock recommends on their Vortec aluminum heads Champion RC-12YC plugs.........I'll try to find the equivalent AC #
corvette440hp
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[QUOTE=corvette440hp]Edelbrock recommends on their Vortec aluminum heads Champion RC-12YC plugs.........I'll try to find the equivalent AC #[/QUOTE] I actually cross referenced that to use a Denso Iridium plug (1Q16), with my E-Tec 170 heads.
corvette440hp
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Gilbert Chevrolet (old Sallee) recommends the AC R44LTS plugs.
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in Forum: C3 Engines, Driveline and Handling
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