Dave connors Posted February 14, 2022 Share Posted February 14, 2022 After a bit of advice on the best spark plugs to fit to a fixed cam sigma supersport 140bhp, currently have NGK TR5B13 which it came with was going to change so just need to make sure they are correct. Link to comment Share on other sites More sharing options...
Tom_Arundel Posted February 14, 2022 Share Posted February 14, 2022 Sounds ok, check the gaps at 0.9mm - 1.0mm Link to comment Share on other sites More sharing options...
Brian27 Posted February 15, 2022 Share Posted February 15, 2022 Hi DaveI have the same engine in my red 40 years of Caterham car (you will know me from Longdon meet). I use Bosch HR8MCV+ plugs in mine.Brian Link to comment Share on other sites More sharing options...
Dave connors Posted February 15, 2022 Author Share Posted February 15, 2022 Cheers BrianYes I do remember you I'll try some of those in if yours has been running well on them.CheersDave Link to comment Share on other sites More sharing options...
Amos91 Posted February 15, 2022 Share Posted February 15, 2022 NGK TR5B13 here - all good! Link to comment Share on other sites More sharing options...
Tom_Arundel Posted February 15, 2022 Share Posted February 15, 2022 Please note the `13` denotes a gap of 1.3mm which could cause coil problems at high revs. Gap should be 0.9mm Link to comment Share on other sites More sharing options...
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