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Q & A: Timings and Setting for 77B

I would really appreciate your help in the timings and settings for my 1977 MGBGT. I stripped my 5 main bearing engine down and had the block rebored to +20 thou got all the new bits to recon the motor and have after many months finally got it all back in place and over Easter have fired her up . The settings that I used were from the MG manuel and were as follows 1, points.0.35mm 2.plugs.0.89mm. 3.static timing 7*B.T.D.C. 4, Rocker valves cold 0.38mm.5, Idle speed 750rpm. I got the engine to run on these settings and once the new paint and oil had burned of it settled down and I adjusted the idle speed it ran not to bad . The engine no is 18v847-h152236 and chassi is no ghd5-431559g , I know the +20 pistons make the engine 1822cc so can you give me advise as to what settings you would use for the reconditioned engine . It has hif4 twin su,s type ece 15 fzx1229 carbs needles std acd. Also a lucas 45d4 distributor,we can only get 96 octain unleaded gas here so i use this with valve master adative to run it on. I'm not a mechanic im a carpenter so this engine stuff is a hobby to me I haven't stopped smiling yet that the engine started for me. Thanks in anticipation and thanks for all the tips in your Q&A section. John I have been looking and looking in your Q&A section hopeing to see your surgestions for my engine timings which I sent to you 29th march . I hope you do not mind me resubmitting my question as I dont want to do any harm to the engine, if you could help me out I would be very greatfull.Dave

David!

From 1954 (Z type Magnettes) to the last 1980MGBs, there are only two main settings for the B series engine. Quickly -- this are:

1) A distributor with about a 10 degree maximum mechanical advance. This di... read more