MG-Cars.info

Welcome to our Site for MG, Triumph and Austin-Healey Car Information.

Recommendations

Parts

MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG Midget and Sprite Technical - Which Spark Plugs

Hi
1380 engine , uprated head , larger valves , uprated cam , 10.5 CR , need some advice on plugs which ones to use ? Weekend car so not used every day , any one got any suggestions and where to get from ?
cheers
Andy
Andy Chaffey

NGK BP7ES would be a good starting point.

Should be available from most motor factors, I would have thought.
Dave O'Neill2

I have a similar engine spec on my Sebring.
Ditto Dave's advice.
Derek Stewart

Andy,
this chart will help explain Dave's suggestion - http://www.ngksparkplugs.com/techinfo/spark_plugs/partnumberkey.pdf
Nigel Atkins

Use the coldest you an get away with on an uprated engine - I have NGK BP8ES using uprated head. Buy from any motor factors - they are very common. Try Iridium/platinum for longer life - naturally more £££.
Mark O

I take Mark's approach too - coldest you can get away with. The only downside of a cold plug is it will foul, whereas a plug which nis too hot can damage the engine. Start with BP8ES an if it doesn't foul that's fine. If it does then it's BP7ES. It would be surprising if it's not one or the other.
Paul Walbran

1380, 10.4:1 CR, 12G940 'big valve' head, Piper BP270 cam, etc. Started with NGK BP7ES and had No.1 burn out, but the cause was something else. Fitted BP8ES as a precaution and had no problems since.
Richard Wale

This thread was discussed between 19/08/2012 and 22/08/2012

MG Midget and Sprite Technical index

This thread is from the archives. Join the live MG Midget and Sprite Technical BBS now