Hey guys, I just recently put a roller motor from a 1987 LSC into my 1985 LTD LX with stock CFI. I just bolted on my stock intake and CFI throttle body and didn't mess with any settings on it. I set the initial timing to 10* and it runs great until I get to normal operating temp, then it starts pinging under heavy acceleration. It also stumbles a bit when I stomp on the gas. I tried going down to 8* and it stumbled worse, I tried going up to 12*, no difference. I never had this problem with my stock non-roller motor with my stock CFI, does the roller motor need more fuel or timing? Am I running too lean? I also tried 91 octane and that had no affect. I'm pretty stumped by now, I can drive the car around fine but I cannot get on the gas too much because of the pinging. Any help or would be great.
Thanks
Mike
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