What ratio to cut C14 for street cruising/ putting around.
Posted: Tue Apr 12, 2005 7:29 pm
4.5x4 509ci iron head BBC (fully ported 280cc oval World), true 13.7:1, 280/288@50th soft ramp roller, 5K 9" converter, prosystems 1088cfm nitrous pro IV carb, stock rod length, 113cc open chamber polished, all hard edges rermoved from domes. Water temp stays below 185F at the top of the intake manifold.
I run C14 / 38 degrees at the track - 94 jet squared from the dyno tune.
I want to cut my race fuel with 94 octane Sunoco 94 10% ethanol fuel - just to cruise around with (1200-4000 rpm, all on the primaries, well below torque peak, always under high intake vac.)
How light a load of fuel can I run? I have one multistep retard on the shifter, so it's no problem to pull 4 degrees (eg) if I have to pass someone.
I am familiar for looking for detonation signs on plugs for N20 tuneups, but don't know if a light rattle would show up this way.
Please lend a hand,
MAT
I run C14 / 38 degrees at the track - 94 jet squared from the dyno tune.
I want to cut my race fuel with 94 octane Sunoco 94 10% ethanol fuel - just to cruise around with (1200-4000 rpm, all on the primaries, well below torque peak, always under high intake vac.)
How light a load of fuel can I run? I have one multistep retard on the shifter, so it's no problem to pull 4 degrees (eg) if I have to pass someone.
I am familiar for looking for detonation signs on plugs for N20 tuneups, but don't know if a light rattle would show up this way.
Please lend a hand,
MAT