Thread: spark plugs
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Old 05-01-2021, 03:56 PM
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TCSGTO TCSGTO is offline
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Join Date: Dec 2000
Location: Warren,Ohio,USA
Posts: 1,677
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Autolites are now made in China and have a different appearance than the older versions.
I used to run the 3924’s but like Ngk 5 heat ranch for lots of idling, stop n go driving and 5 or 6 for track days.

__________________
68 GTO,3860#
Stock Original 400/M-20 Muncie,3.55’s
13.86 @ 100
Old combo:
462 10.75 CR,,SD 330CFM Round Port E's,Old Faithful cam,Jim Hand Continental,3.42's.
1968 Pontiac GTO : 11.114 @ 120.130 MPH

New combo:
517 MR-1,10.8 CR,SD 350CFM E's,QFT 950/Northwind,246/252 HR,9.5” 4000 stall,3.42's
636HP/654TQ
1.452 10.603 @ 125.09
http://www.dragtimes.com/Pontiac-GTO...lip-31594.html