Like mark said the normal timing is around 14° but since every car and setup is different you need to do a little trial and error. Start with the timing at 14° and drive the car around. If it pings (a sound of rocks shaking in a coffee can) then turn it down a degree or two. If you dont hear pinging then you can try going up a degree or two. For the most part you want it as high as can go without pinging. Some guys set theirs as high as 16°, and 10° is what its set at from the factory.
Remember that if you are running a higher than stock timing you will more than likely need a higher octane fuel. Also usually during cooler weather you can run a lower octane fuel, but during the summer 91+ octane is needed with the timing bumped up.
BTW... a friend of mine ran his at 18 degrees without pinging in cooler weather, and without the A/C on. He eventually put it down to 14 to be on the safe side though.
OT: Jim are you just copying and pasting that degree symbol from somewhere or is there some trick to typing that in?
Sorry Mike I just read your post. To get the ° symbol hold down "alt" and type 248 on your numeric key pad, then let go of alt and it should show up.
I set the timing to 10BTDC and it runs pretty bad but I also put a supercharger on it too so what should I set my timing to for the supercharger and 93 octane pump gas? There is no knocking or pinging it just has a studder and intake backfire like 88FOXLX has that I thought I got rid of when I changed my fuel pump but now its back.
mike, you need to bump your timing up, 10 degrees is not enough with 93 octane and a supercharger. no matter weather its an auto or manual, set it to 14 and go from there. if its a manual you should have no trouble going to 16, if its an auto you'll just have to see for your self. hope this helps