Another_User

I was getting 4.5 degrees of knock retard at WOT (on my Malibu...) with the stock timing tables with 110 degree intake temps. Since it takes regular gas, I tossed in some premium along with some octane booster (supposed to raise octane up to 15 points or 1.5 octane), so I was running with maybe 94+ octane (I ran 70 miles to mis everything up and flush everything out of the lines before my last log) if I am lucky and my knock retard consistently dropped to about 1 degree or less. Are the stock tables just really agressive?

WS6FirebirdTA00

iTrader: (33)

maybe it was just the high temps pulling timing out. i know in the ls1 it has tables for 100+ where it pulls timing, im wonderig if thats what is going on?

now that i have been paying attention to it i can hear a lot of cars spark knock in the heat, might be shitty 87 gas?

Another_User

There is a IAT advance table pulling timing already. So that would mean that the IAT advance table is not pulling enough timing, except even when it is cold(er) outside I was still getting plenty of knock retard.

WS6FirebirdTA00

iTrader: (33)

thats right it just pulls it it wouldnt show up as kr, i wonder how much the egr effects it dumping that extra hot exhaust gasses in there?

Another_User

Nope, technically EGR cools your combustion temps. Besides, EGR does not flow at WOT.

WS6FirebirdTA00

iTrader: (33)

ook wasnt thinking wot, but it cools combustion temps but increases the charge temp into the chamber.