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#1
02-04-2002, 10:57 PM
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My engine is getting real close to being done. I need a recomendation on sparkplugs, mainly which heat range. I have a set of 62,s on my new 455 comp. is 12 to 1. This is a track car that hopefully will be in the tens. I can,t find any information from sparkplug companys regarding heat ranges for pontiacs. I know it should be a few colder. But I'm haveing a tuff time with parts house people that just know stock applications and can't tell me which plugs are colder. I will be greatfull for any help.
Thanks Mike S |
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#2
02-04-2002, 10:57 PM
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My engine is getting real close to being done. I need a recomendation on sparkplugs, mainly which heat range. I have a set of 62,s on my new 455 comp. is 12 to 1. This is a track car that hopefully will be in the tens. I can,t find any information from sparkplug companys regarding heat ranges for pontiacs. I know it should be a few colder. But I'm haveing a tuff time with parts house people that just know stock applications and can't tell me which plugs are colder. I will be greatfull for any help.
Thanks Mike S |
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#3
02-05-2002, 01:54 AM
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Mike
Sounds like a great combo...I guess I'm a little partial though [img]/infopop/emoticons/icon_smile.gif[/img] My 462 with 62#s and 12:1 runs 10.30's in a 3500lb street car on motor only. I have tried AC delco R43S and R45S. Reason for trying the 43's was for nitrous use. I have also tried Bosch plat. My best passes have always been with AC R45S gapped at .040. I think if a plug is fresh, clean and gapped correcly, and is in this general heat range, it will work. For nitro, choose a plug with meaty electrode strap like the Bosch. I would like to hear more details on your car and would like to be updated on its performance if you have the time. Please E-mail me with any info.
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1971 Base Firebird..505ci IA 2A Round port E-heads by Butler 348 cfm.. Comp street SR 266/272@.050 Victor intake/Quick Fuel Q950. 1 7/8" Dougs headers..3" mandrel bent exhaust with Hooker Max Flow mufflers, T-350 well built with 10" 4000 stall nitrous Continental converter..3.73 posi . Caltracs and 10" slicks. Belt driven water pump, alternator, Pwr steering and brakes,Flex fan. 11:1compression, straight 93 octane pump fuel. 10.35 @ 129.88 with 1.45 60ft N/A at 3700lbs race weight. |
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#4
02-05-2002, 04:07 AM
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I use NGK B7S. #62 heads and 469". Seems like the perfect choice to me.
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 Street/strip 1969 TA clone. Back halfed. 3300lbs. Twin turbo LSX 387cu. JW glide. Holley Dominator EFI. E85. Street driven.https://www.facebook.com/photo.php?f...type=1&theater |
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#5
02-05-2002, 11:53 AM
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I used Autolight 73 or 75.
Also, happen to cut the groung lug short and reform for side-gapped operation.
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12.24/111.6MPH/1.76 60'/28"/3.54:1/SP-TH400/469 R96A/236-244-112LC/1050&TorkerI//3850Lbs//15MPG/89oct Sold 2003: 12.00/112MPH/1.61 60'/26"x3.31:1/10"/469 #48/245-255-110LSA/Q-Jet-Torker/3650Lbs//18MPG 94oct Sold 1994: 11.00/123MPH/1.50 60'/29.5"x4.10:1/10"/469 #48/245-255-110LSA/Dual600s-Wenzler/3250Lbs//94oct |
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#6
02-05-2002, 12:25 PM
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Half Inch, You side gap your plugs! I side gapped mine back in the 60's. People made fun of me and after that I would not let anyone see my plugs. On my 1959 Cat. tri-power NHRA stocker, I could pick up a tenth when I side gapped the plugs.
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#7
02-05-2002, 07:55 PM
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Ask the parts counter guys if you can look at the books they get from their manufacturers. The spark plug company books I've looked at have info on heat ranges, how to read their numbering systems, etc.
The computer parts guys really look at you funny if you start asking about things like bigger radiators for engine swap projects. 
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