I should be able to run lower octane fuel with last year'* pulley and run maybe one heatrange warmer than then (I was 2 heatranges). But keep in mind, I'm dropping back down to a 2.0" pulley.
I'll lean a little on INTENSE and their intercooling experience to select my plugs. And I'm prepared to have to replace them a couple times before I hit the track.
Here'* some more pics. In a nutshell, I found some repairs are necessary on this LIM, so I stopped short of finishing the porting right now for repairs (and I'll move onto another LIM in the meantime).
Here'* where I am so far.
Stock OEM under-cast-porting criminal action:
Stock head ports are .9 by 1.9". You want to port out to just 3.553 whiskers LESS than that. My current heads are ported out larger than that though, so I'll take this one farther to match.
Found some nasty pitting in the coolant port areas that I'm going to have to repair:
Nice little casting flaws here on two different ports:
Not to mention edge quality:
All of the above port flaws create 'hot spots' under boost. The edge chipping will go away naturally with porting.
Here'* where you want to stop porting for stock heads:
Here'* the difference on the bottom of the port. I roll the bottom corner out a bit rounder than stock. Don't go too deep or you'll break through the casting to the lifter valley. There'* a casting depression on the other side. The left is roughed in with the blend, the right port is not. Can you see the difference? I do the same basic thing to the bump inside the port for the injector boss, but only light blending:
I'll show more pics of these details later.
Here'* after cleaning the corrosion out of the pits in the water passage areas:
And here'* where my porting stops. Shaved down to 3.335 whiskers smaller in width and height than my ported heads:
These ports will get some finish work, but not until they're all roughed in to the correct dimensions. Right now, that LIM is in the oven pre-heating for corrosion/pitting repair. While that dries, I'll move onto another LIM (not the same one I did last night).