Lotus Elan

Competition Racing Plugs NGK B9EGV

PostPost by: SJ Lambert » Mon Sep 30, 2019 2:01 pm

My standard NGK BP8ES plugs were running hot - so I?m going to try the B9EGV competition plugs
Ford Escort Mk1 Lotus Twin Cam
Elfin Monocoque (Twin Cam)
Elfin Type 300 (Holbay S65 - 120E) mechanic

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SJ Lambert
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PostPost by: rgh0 » Mon Sep 30, 2019 9:02 pm

BP8ES plugs should be good for your engine, have you checked your mixtures on a dyno - you may be running lean at high revs ? What fuel are you running now since they banned Avgas ?

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PostPost by: SJ Lambert » Tue Oct 01, 2019 12:05 am

I was suffering from ignition breakdown at 6000 rpm, so have had Andrew Makin breath on the old Lucas distributor to optimize it, he's done a recurve as well as supplying a super duper condensor and improved the cap to lead connections and changed the coil from a GT 40 to a SU12.

It may be that the BP8ES plugs will feel more at home in that "new" environment.....
Ford Escort Mk1 Lotus Twin Cam
Elfin Monocoque (Twin Cam)
Elfin Type 300 (Holbay S65 - 120E) mechanic

[email protected]
User avatar
SJ Lambert
Fourth Gear
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Posts: 748
Joined: 19 Nov 2010
Location: Victoria, Australia

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