E85 vs 91 for street
Enough overlap to bleed off cylinder pressure, richer A/F, timing, perfect quench, cool aluminum heads to suck some heat out, I don't see why higher compression and/or lower octane is not possible. Getting the balance right of all variables is the key so you don't wind up with a dog or knock machine.
Just look what Chrysler does with its VVT on the 3.6 Pentastar so it can not only run safely on 87oct but also pass strict NOx emissions with 10.5 cr.
Basically using VVT for a little EGR.
Intake Cam centerline timing
Exhaust Cam Centerline timing
Enough overlap to bleed off cylinder pressure, richer A/F, timing, perfect quench, cool aluminum heads to suck some heat out, I don't see why higher compression and/or lower octane is not possible. Getting the balance right of all variables is the key so you don't wind up with a dog or knock machine.
Just look what Chrysler does with its VVT on the 3.6 Pentastar so it can not only run safely on 87oct but also pass strict NOx emissions with 10.5 cr.
Basically using VVT for a little EGR.
Intake Cam centerline timing
Exhaust Cam Centerline timing
