I am a relatively recent convert to the Series Rover brotherhood and am about to tackle the timing/tuning of my 1973 Series III NAS 2.25 petrol for my first time. To the best of my knowledge it is a 3-bearing, 8:1 compression engine that has never had the no-lead head conversion (i.e. has the original head) and it has a Weber 34ICH carb.
I have read the threads regarding timing by ear and timing by beer, but also may try my hand with the strobe. I have also seen the figures in the green bible for different octane fuels. I've been running unleaded premium in her, but would rather not unless it's necessary. I guess that makes a difference with the timing values. My question is: with fuel nowadays containing up to 10% ethanol, does that change those figures? I assume that the ear and beer methods are unchanged, but what about the green bible's values?
One more point (pun intended) of information. A mechanic friend installed and timed a Pertronix electronic distributor and coil a while ago. I hope this won't become a referendum on the wisdom (or lack thereof) of doing so; just wanted to mention no points to gap or deal with.
I am very grateful for all the knowledge I've gleaned from other threads regarding getting the timing correct before adjusting the carb, etc. Any other advice for this new guy who is by no means an experienced wrench would be greatly appreciated. Thanks in advance (pun intended).
I have read the threads regarding timing by ear and timing by beer, but also may try my hand with the strobe. I have also seen the figures in the green bible for different octane fuels. I've been running unleaded premium in her, but would rather not unless it's necessary. I guess that makes a difference with the timing values. My question is: with fuel nowadays containing up to 10% ethanol, does that change those figures? I assume that the ear and beer methods are unchanged, but what about the green bible's values?
One more point (pun intended) of information. A mechanic friend installed and timed a Pertronix electronic distributor and coil a while ago. I hope this won't become a referendum on the wisdom (or lack thereof) of doing so; just wanted to mention no points to gap or deal with.
I am very grateful for all the knowledge I've gleaned from other threads regarding getting the timing correct before adjusting the carb, etc. Any other advice for this new guy who is by no means an experienced wrench would be greatly appreciated. Thanks in advance (pun intended).
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