[Healeys] Rough running 100M

i erbs eyera3000 at gmail.com
Wed Aug 2 18:50:01 MDT 2017

did you change the rotor? simple test. I have seen this happen with a bad
rotor or even the carbon piece/and spring that connects the cap to the

Ira Erbs
      _______                                  _______
     (______ \____1959 BN4____/ _______)
          BT7 engine and disk brakes

A racing car is an animal with a thousand adjustments. Mario Andretti
Please excuse random auto corrects and misspelled words

On Wed, Aug 2, 2017 at 4:35 PM, Larry Paterson <Larry at patersondesign.ca>

> Hi folks – here’s one for you to ponder.  For the past many years I’ve
> raced my 100M without a problem.  Lately however at around 4500 RPM under
> load it balks and stutters running quite rough.  I’ve checked timing,
> changed the condenser several times checked carbs and all the other usual
> stuff.   When not under load it revs freely.   The motor has a billet
> crank, roller rockers, aluminium head, 100S pistons, lightened flywheel etc
> and regularly ran up to 6500 – 7000 RPM with no issues. It also has a
> Mallory distributor and is running 24 degrees of advance. Any advice on
> where to look next would be much appreciated.
> Thanks
> Larry Paterson
> 100M, BN7,
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