Im in way over my head but trying to crawl my way up. Rebuilding an 87 custom deluxe and putting the 305 TBI back in after being replaced years ago with a carbd 307. the 305 has been bored .030... 209/212 490 lift roller cam ...full roller rockers.... GM performance intake... headers.... mildly ported 081 cast heads...three wire o2..It has stock ECU 7747. im just trying to get some data to study but spark advance knock count and injector duty cycle are maxed! its running ok MPG is crap and power is sad but i kinda expect with stock tune. Will someone please look at the data log that knows what theyre looking at?
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