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04-14-2002, 09:01 PM
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#1 |
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Registered User
Join Date: Nov 2001
Location: Springfield, MO
Posts: 2,939
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what spark plugs
I hated to ask again but I searched the best I could looking I have seen this posted before. Next time I will print it
 I have a 327 with HEI what plugs should I run?Thanks Dave
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Dave 1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap 1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?) "A good friend will bail you out of jail...but a true friend will be sitting next to you saying "that was frekin awesome". "If it doesn't fit force it...If it breaks then it needed to be replaced anyway!" |
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04-14-2002, 09:27 PM
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#2 |
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Registered User
 
Join Date: Oct 2001
Location: Southern New Mexico
Posts: 649
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I think you would go with stock plugs gapped at .045
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04-14-2002, 09:54 PM
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#3 |
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Registered User
Join Date: Feb 2000
Location: Maquoketa, Ia/ Orr, Mn
Posts: 3,051
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go with what the manual says for HEI .060" gap this will give you the most powerful spark for HEI. .045 and .035 are old fashioned for points. Use AC R45TS plugs, they have given me the best longevity and response in my 350. I like to stick with GM parts since they did come from the factory like that and were tuned for those parts. Just my $.02.
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'51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com |
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04-14-2002, 10:54 PM
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#4 |
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Registered User
Join Date: Jun 2000
Location: Chico, CA
Posts: 1,136
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I second the AC plugs, R45 with a .045" gap and you should be stylin'
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My engine is stock... trust me ;o) |
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04-15-2002, 12:16 AM
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#5 |
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Registered User
Join Date: Oct 2001
Location: SW Washington
Posts: 1,006
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The question I have is. NAPA sold me AC R44T, and the Chevy Service Manual recomends the AC R44TS. Found out that the "T" is a little shorter, and the "TS" longer (closer to the piston). What do you guys think / recomend? Darren
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Washington State 1967 Chevy C10 LWB Rodstoration In Progress. 1972 K20 Cheyenne Super |
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04-15-2002, 12:43 AM
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#6 |
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Registered User
Join Date: Jun 2000
Location: Chico, CA
Posts: 1,136
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It probably wont make that big of a difference. Only real way to tell on your motor would be to try both. Spark plugs are so cheap it doesnt really matter. But, are you running rich at all? If you are you might want to think about stepping up to R45's... they're a little "hotter" than R44's and I'm pretty sure that the 45's are the OE plug for HEI ignitions.
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My engine is stock... trust me ;o) |
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04-15-2002, 08:33 AM
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#7 |
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Registered User
Join Date: Nov 2001
Location: Springfield, MO
Posts: 2,939
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Great Thanks guys I guess the difference in the plugs from stock to HEI is just the gap. I will get new ones and open the gap up some!
Thanks! Dae
__________________
Dave 1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap 1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?) "A good friend will bail you out of jail...but a true friend will be sitting next to you saying "that was frekin awesome". "If it doesn't fit force it...If it breaks then it needed to be replaced anyway!" |
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