<VV> Octane for 140

[Dennis & Debbie Pleau]

Put the highest octane you can get in it, advance until it pings and back 
off a little.  From the factory 140s were OK for the times.  The squish 
area was rather wide to allow for carbon/lead build up.  Mill out the step 
which will tighten the squish area and bring he compression ratio back up 
to 9.5 to 1 or even 10:1 and you can still burn high octane with out any 
problems and run full advance.

dp

At 05:02 PM 6/20/2005, Padgett wrote:
>Would appreciate opinions. Think that 87 PON is probably not enough but 
>with only 9:1 compession I would expect a 140 to do well on 89 octane 
>mid-grade. Is this so ? Summer, east coast sea level driving. Any ignition 
>tweaks required ? Brands to get/avoid ? Additives ?
>
>Padgett