mfg Posted January 10, 2021 Report Share Posted January 10, 2021 By careful machining of the combustion chambers, Avanti R1 cylinder heads can be substituted for lower compression R2 heads.....True? Link to comment Share on other sites More sharing options...
mfg Posted January 12, 2021 Author Report Share Posted January 12, 2021 No opinions on this one? Link to comment Share on other sites More sharing options...
VtMike Posted January 13, 2021 Report Share Posted January 13, 2021 I believe I have been told that you can port and polish R1 heads and use them with a supercharger, so I will say Yes, but don't know how you would do it. Link to comment Share on other sites More sharing options...
brad Posted January 13, 2021 Report Share Posted January 13, 2021 You probably can take at least 1/2 a point of compression by leaning back the point between the valves, and the shallow end of the chamber. Also some "unshrouding" of the sides on the upright walls. That and use the thicker composition gasket, and you would be there. It would most likely breath and perform better than stock R2, and be less prone to cracking that the R2 heads had. Link to comment Share on other sites More sharing options...
mfg Posted January 13, 2021 Author Report Share Posted January 13, 2021 19 hours ago, VtMike said: I believe I have been told that you can port and polish R1 heads and use them with a supercharger, so I will say Yes, but don't know how you would do it. 18 hours ago, brad said: You probably can take at least 1/2 a point of compression by leaning back the point between the valves, and the shallow end of the chamber. Also some "unshrouding" of the sides on the upright walls. That and use the thicker composition gasket, and you would be there. It would most likely breath and perform better than stock R2, and be less prone to cracking that the R2 heads had. Yes, this can be done!...Thanks for the details Brad! Link to comment Share on other sites More sharing options...
Dwight FitzSimons Posted January 14, 2021 Report Share Posted January 14, 2021 Wouldn't using the thicker head gaskets make the quench area "thicker" and therefore increase the chances of the engine to ping? -Dwight Link to comment Share on other sites More sharing options...
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