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Did you CC the head and calc your C/R? how do you know it is 9/1? is the head milled at all? you can shim it up with a copper gasket. maximimum head cut is .015 so you should be able to raise it that far as well. you can cc the head with a syringe and water and a scale. 1 gram = 1 cc and more accurate than reading a graduated coloumnWhat are you using for injection control? every lh system we dynoed has run lean at about 4500 up. Blown engines get expensive. i toasted mine at 7k the first time.
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