developed a very noticable flat spot stutter at around 3000 to 3500 rpm ,revs cleanly before aqnd after this rev range
its dellortos on a 1800 vauxhall ohc
ps happened after giving it some right foot i had also turned fuel reg down previously up to this happening and have reset it to 2.5 psi

tut tut, not speeding again
Rick

yes and seem to recall you were BEHIND me