That 30 degrees sounds about right. From what I can find it’s hard to say what I should use. The 300 info I found was the usual 2 values 31 degrees max advance I can’t find an understandable 3D map for max or min timing. From what I’ve found the 300 is less compression not by much but mine is sort of unknown. I got some weisco 11.5/1 fly cut and took a little over a mm of the top to try and help then I used a 1 mm copper head gasket so I’m hoping I’m lower than 11/1 but I may be over that. Also my min advance map seemed to be more 3D but I’m not sure if it’s set up right in the upper rpm aswell I do have to lift eventually lol and it seemed shifts are touchy faster the better. I just imagine that’s also partially the boost falling off but I’m curious if any other boosted engines change things their aswell.
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