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John, I have read that about the regular Mahle 8.5. I was told that is why the Mahle RS 8.5 is more consistent in being 8.5. Are you referring to both? I have Carillo 9.5 Pistons on order, but it seems that the more I hear about higher compression engines being needy to keep running correctly, the more I shy away from them. I can work on the engine to a point, but I don't have extensive knowledge of them and don't want to feel like I'm constantly fiddling with it to keep it running right. A few local experts indicated that the 8.5RS is more of a user friendly engine that will run for years to come (if not abused). I'd rather have the extra 20-30 hp with the 9.5, but looking for confirmation from users that have experience with the 9.5. I also have to take in consideration of advice given by owners who say they are not anymore needy than lower compression engines, but who also take their engine apart often while racing. I need to keep everything I've read and advice given in perspective from the author who gave it!
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