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They were only happy on race fuel (very happy). They would run with a decent additive (lucas), but were not happy at all with the 93 from the pumps. So we finished the season with additives and are putting on aluminum heads. Were going to see if Mark (Precision Marine) can make them happy on his dyno before we re-insert and torture the XR's. Everyone we talked with said the set up should have worked without additives or race fuel. But they were not happy. So were trying a different approach and will see how it goes. I have been swamped lately and not on OSO much, so sorry for the late reply.
dj
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Gold Member
