"Interesting" spark plugs
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"Interesting" spark plugs
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I'm cleaning out my shop and I came across some special spark plugs I was given several years ago by a guy at GM Motorsports. He wanted me to try them in an engine I was running on the chassis dyno, but they were really too cold for what I was doing.
They are AC Racing Spark Plugs PN VF438LS. When I got them, I was told that some Winston Cup Teams were using them. That makes sense as they are clearly for racing only. They are a very cold heat range, surface gap type of plug which would be good for a high-rpm engine that generates a lot of cylinder pressure. An example would be a race engine on nitrous oxide, with supercharger or a normally aspirated with a very high compression ratio. These plugs fit any head that takes a 5/8-in hex, flat-seat, 3/4-reach spark plug. OE 86-91 Corvette aluminum heads take plugs of those measurments as do many GM Performance and aftermarket (Brodix, AFR, Edelbrock etc) aluminum racing cylinder heads.
I have these plugs on eBay. These plugs are new...never been in an engine. If you're interested, look at:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2435722193
[Modified by Hib Halverson, 8:30 AM 10/8/2003]
I'm cleaning out my shop and I came across some special spark plugs I was given several years ago by a guy at GM Motorsports. He wanted me to try them in an engine I was running on the chassis dyno, but they were really too cold for what I was doing.
They are AC Racing Spark Plugs PN VF438LS. When I got them, I was told that some Winston Cup Teams were using them. That makes sense as they are clearly for racing only. They are a very cold heat range, surface gap type of plug which would be good for a high-rpm engine that generates a lot of cylinder pressure. An example would be a race engine on nitrous oxide, with supercharger or a normally aspirated with a very high compression ratio. These plugs fit any head that takes a 5/8-in hex, flat-seat, 3/4-reach spark plug. OE 86-91 Corvette aluminum heads take plugs of those measurments as do many GM Performance and aftermarket (Brodix, AFR, Edelbrock etc) aluminum racing cylinder heads.
I have these plugs on eBay. These plugs are new...never been in an engine. If you're interested, look at:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2435722193
[Modified by Hib Halverson, 8:30 AM 10/8/2003]
