if your looking to keep cost down i would mark the 20b off the list. i can get very expensive very fast 14K 20B . the 13BT made about 210FWHP the 20B made around 290FWHP. before i buy a rotary i would get compression numbers. that can tell alot about the rotary. like someone said earlier just start reading RX7 sites (rx7club.com nopistons.com)Originally Posted by bdydrpdmazda
GL on the swap





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