yes this was on e85. I was there to hear the misfires. e85 is far more likely to pre-ignite. dont have time to right a 2000 word essay on the hows and whys. is is suffice to say bent rods are common on alky and misfires. this is exactly why I never ran stutter launch on yellow car. 93 with meth injection is bad news under this condition. some guys in canada kept bending rods on the stutter box with their meth injected cars. if you hit 9psi on the line on the stutter and your meth is turning on at 5 psi you have a perfect condition for pre-ignition.