502 spark plug
06-04-2009, 09:24 PM
#2
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: 502 spark plug
Depends if the heads use a tapered seat or gasket plug.
What exactly do you want to know? The only important thing to know about spark plugs is the heat range. You need to run the coldest plug possible that doesn't foul up. The required heat range depends on a lot of factors such as timing, jetting, compression ratio.
With a tapered seat and using AC Delco plugs, put in R43TS plugs.
Generally, use the exact same plugs you would use in a SBC. BBC normally can use at least 1 heat range colder than SBC.
What exactly do you want to know? The only important thing to know about spark plugs is the heat range. You need to run the coldest plug possible that doesn't foul up. The required heat range depends on a lot of factors such as timing, jetting, compression ratio.
With a tapered seat and using AC Delco plugs, put in R43TS plugs.
Generally, use the exact same plugs you would use in a SBC. BBC normally can use at least 1 heat range colder than SBC.
06-05-2009, 01:10 PM
#4
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Join Date: Jul 1999
Location: 51°N 114°W, 3500'
Posts: 17,110
Likes: 0
Received 120 Likes
on
101 Posts
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: 502 spark plug
If the R43TS foul up, up the R44TS back in.
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