I was wondering if anyone has had any of the same problems, and could give me any input as to why my car sometimes just does not perform as it should. Just tonight I was out doing some "comparative" driving against another friend who also owns an SC. its a 91 Auto just like mine, and his only mods are removed resonator and mufflers. Now I have run him many of times, and beat him, and have run at the track and turn out higher MPH speeds (by like 4 mph); his best is a 15.4. Mines usually around a 15.0. Well tonight we ran them a few times, and he beat me every single time, from a roll, stop; it didnt' matter. I did pull a little the first time on the high end and that was about it. I just recently did a rebuild, but my car seemed to do this before the rebuild also. Sometimes its so fast I can beat everyone, and sometimes I get beat time and time again. We had just raced about 1000 miles after my rebuild, and I came out on top every time we ran them. I don't understand. I have the mods listed below, and he even took my from a start where I usually cream everyone. What are my possibilities. My car does have a rough idle (sounds like its missing) but I don't feel anything when at WOT. I still have the same spark plugs in that were in there when i blew the HG's but they were brand spanking new only a week before, so i didn't think it hurt them at all. Could my car possibly be retarding the timing?? I always use 93 octane because i run the 10% pulley just to be cautious. So I don't see why it would be doing that. It was about 72 degrees out when we raced. Im so confused. This is the first time my car has did this. It seems to change from race to race with someone.
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