So my (re)rebuilt engine is running (again). Adjusting the timing, Im having to set my idle timing (approx 1krpm) to 20 deg bTDC. trying to retard it further like 18 or 16 causes the rpm to audibly drop and the idle to become rougher the closer i get to 0. at 22 or 24 deg btdc the idle rpm also starts to go down.
Here's my engine specs:
998 +40 dished pistons
C-AHT88 minispares head
EVO001 cam timed to 107 degrees (as per spec)
stage 1 kit
CR 9.4 (block and head decked)
minispares forged rockers set to 0.14 thou
fuel mixture set using colourtune.
Im running Shell V-Power 97 RON fuel, so was hoping to get the timing closer to TDC. Ive read on the forums that 8-12 is typical for an idle.