[PeteBrown]

Jeremy:
Very impressive work. I'm taking notes as my '87 is becoming more and more of a track car and I'm just waiting for the day when my engine starts gulping oil (still only burns 0.5 a quart/1000mi @73k).

What are the compression ratio limits for a single plug? I see that your new pistons have a 9.8 cr, which I believe is similar to the European cr specs. Others like 89911 and Carrera3.5 have converted to twin plugged heads. Can the cost of twin plugging be prevented by using milder cams or adjusting the ignition through a chip?

Thanks
Pete