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Racing plugs?

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Racing plugs?
Dirk73 Offline
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Joined: Jan 2019 Posts: 48 Threads: 9
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#1
30-08-2023, 08:21 PM
I wonder if anyone in the A7 racing fraternity could recommend a good plug? I've been using the Champion D16 18mm as available from our cherished suppliers but have had a few failures.

I've got a set of 18mm-14mm adaptors so could change to a 14mm plug if that gives more options. The engine is fairly hot (blown 12psi). 
Any suggestions very welcome Smile
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David Cochrane Online
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Joined: Aug 2017 Posts: 444 Threads: 13
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Location: Dunchurch, Warwickshire
#2
30-08-2023, 08:55 PM
The Champion D21 18mm plugs seem to work better than the D16s and are available from the Cherished Suppliers.
http://www.a7c.co.uk
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Howard Wright Offline
Grey Mag editor
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Joined: May 2018 Posts: 1,921 Threads: 102
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Location: Llandrindod Wells
Car type: 29 Special, 30 RK, 28 C Cab
#3
31-08-2023, 12:02 PM
+1 for D21s.  They work well on my Special with a Ricardo head!

Cheers

Howard
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Charles P Offline
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Joined: Aug 2017 Posts: 1,440 Threads: 59
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#4
31-08-2023, 12:31 PM
I've found the older style NGK A6's (not AB6) work well with my blown car.


Charles
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