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Author Topic: Trick flow Twisted Wedge R head spark plug issue  (Read 827 times)
6 Banger
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Posts: 62

Location: Houston TX

« on: September 09, 2017, 02:51:38 am »

I have a pair of the R heads.  Cylinder head has 6018-3 stamped on it. Its a SBF application. 

We had an issue with a standard 3/4 reach plug (autolite 3923) electrode not extending into the combustion correctly and seemed to be shrouded by the plug hole in the head.  We used a NGK LFR5AGP plug, this plug has a 1.04 reach and looked correct inside the combustion chamber.  This has been fine in a naturally aspirated application but now we are moving towards nitrous and having trouble finding a plug for this application.  


1926 Model T coupe 9.8 at 125
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