The fuel jet on this run was two steps smaller than the jet chart from Nos , fuel pressure as per chart.
Plugs are numbered from left to right , lost number 8 plug , so put a pic of a new one out the box.
These plugs were idled off the track back to the pits , so a slight discolour on the top of porcelaine.
Plugs are pig rich appart from No 4 , must be some kind of blockage on the fuel spray bar holes around no 4 runner , anyhow , i think something is amiss somewhere. Timing mark looks pretty good on the ground strap , but a little too much on No 4 cylinder.
No 4 plug looks pretty good as far as tune up goes , but don't wanna lean out anymore to bring the rest of the cylinders in line.
Gonna swap the cheater plate for an NX twin Gemini plate , hopefully the tune might balance out a bit better.
Looks like a lot more could've been had with a bit more tuning , but can't take the risk on No 4 leaning out.
Any more ideas on No 4 cylinder being sooooooooo lean compared to the rest? , will do a run NA & check plugs , will tell me if there's a problem when off the bottle.
