I've never seen to much custom tuning with anything other than a 4G63. I thought your timing was low as well but it makes sense with compression so high. I like to shoot for 17 degrees with my engine but I only have 8.8:1 compression.
Good luck to you on getting the rear end and trans to hold a 9.99 pass. Let us know on here when you are going to try. I would like to cheer you on and buy you a celebratory beer.
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When my car stays in one piece it is fun to drive.
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