We know all about the 20R/22R combo from Celi people in the US. They put a 20R head on a pre 85 head (9:1 comp ratio) and get an instant 10:1 comp ratio with a much better flowing head. There's even a guy who welds up 20R heads to accept 22RE EFI.
Unfortunately, in Australia, 20R heads are virtually noexistant. In the rest of the world, the 22RE was changed slightly - shorter block, TCCS instead of analog EFI, and a 9.3:1 comp ratio. We got this engine in Australia in '85, but with the old analog EFI (probably 'cos we were still on leaded) Putting the 20R on a shortblock actually drops the comp ratio back to 9.0 (somehting to do with different pistons), although it still flows better.
Thu, 13 June 2002 09:56
