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it improves the flow of the incoming air fuel mixture where you realy start making the power is when you put over sized valves into the 20r head and then do some other motor work
I'll be moving along, no need to add anything here.
Ok, so it's just a better flowing head after bigger valves are installed etc... Is it any better than putting bigger valves and porting a 22R head?
No it has a better flow from the get-go, will increase compression and gets even better when you add the oversized valves, and a cam to go with it. Throw in a double roller timming chain and you now have a motor that is stronger than the original. You happy now WM.
a mikuni cam,
Why does the 20R head breathe better? Can you say 'Hemi'?Straighter ports and a plug in the center of the head. I was under the impression 22R valves fit a 20R head. Would really perform with EFI.... The larger valves will drop the cc's a little bit, but you'll still have a higher CR than with a 22R head.
wasnt sayin its not a HS chamber(i know that it is), just that the plug ain't in the center.
I have looked into this extensively, talk to Ted Stanwood at engnbldr.com, he'll clarify the whole hybrid motor myths and facts for you. After my discussion with him I decided to stay with the 22R with a mild port and polish and oversized valves and his 268C cam. Very happy with the result.Tico
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