Quote:
Originally Posted by radz28
Does anyone have an option or insight as to SOI bring high? In a rough tune, on a stock cam LT4, my logs show SOI getting close to 380* My IPWs are holding at about 4.8ms, and rail pressures were holding at commanded. My SOI calculator shows I'm injecting before TDC, but after EVC. My EOI shows I'm at 193*, so I'm also not injecting into compression.
Is there a reason I couldn't inject some beyond 360*? Because this is on full pump E', should I try taking some SOI out of the alcohol adder? Maybe see if that brings SOI down and see what it does to IPW and rail pressure?
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Zero out the alcohol adder table and set the main SOI to around 370. Report back the results. I thought my post from above would give guys a better picture on what happens when you go above 370 on stock cam stuff. When I dropped my SOI back into the 360's it actually richened up even with another degree of timing. You just have to play with it and find what works best for your setup. My guess is somewhere in the 365-372 range will be optimal. On bigger cam cars you can get away with starting injection even earlier but stock cam stuff doesn't gain from it as Mike mentioned.