Good morning ! Well I've acquired an 88 lx coupe with a 2.3 turbo set-up, all the usual upgrades, running a Wilson ms, and tuned on VP110. I would like to convert to E85, I'm thinking that timing should be ok where it's at? Do I still add 30% to the fuel tables? Is there a difference considering it's currently tuned for VP110 and not pump gas? Any help would be greatly appreciated.
You don't add 30% to the fuel table, you change the required fuel AFR from 14.7 (gas) to 9.8x (E85) and it scales it for you. Since actual E85 percentage varies some, you'll find the AFR moves around a bit tank to tank unless you buy it by the barrel directly from an E85 supplier.
The "right" way to deal with the tank to tank variance with no fuel comp sensor is measure each batch with a "fuel tube" and dilute it with 93 pump to a known ethanol percentage (70% is a fairly good target that is easily achievable).