Motorgen - Automotive Events, Meets, Cruises and Forums - View Single Post - Max Compression Ratio for NA LSx Motors on E85?

Vettezuki · 05-20-2009, 10:34 PM

So, if they make E85 more readily available in CA, I'm tempted to make my lil' ole 346 a forged 383, bump the cam one size up and crank up the CR as far as I dare.

E85 seems to vary in Octane rating between 100-105. It also has wonderful cooling effects being 85% alcohol and all.

So, who can calculate a highest safe potential CR. I was thinking at least 13:1, but maybe 14:1.

05-20-2009, 10:34 PM	#1
Vettezuki I, Vettezuki Join Date: Feb 2006 Posts: 14,754 Tweet	Max Compression Ratio for NA LSx Motors on E85? So, if they make E85 more readily available in CA, I'm tempted to make my lil' ole 346 a forged 383, bump the cam one size up and crank up the CR as far as I dare. E85 seems to vary in Octane rating between 100-105. It also has wonderful cooling effects being 85% alcohol and all. So, who can calculate a highest safe potential CR. I was thinking at least 13:1, but maybe 14:1. __________________ Motorgen on To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Motorgen on To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Motorgen Project Car To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. (active) Motorgen Project Car To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. (back burner)