Sealik wrote:Thanks Mike....
Merlin......you stated that.....:BTW that injection set up and head i gave you was from a 4 plug z20e if i remember correctly..."
The only difference between the Z20E and Z22E EFI assembly is the head.....?
All (most) EFI components are the same...injectors... etc....?
If there is a difference in the Z20 air box to the Z22....it can be calibrated for a larger displacment engine by reducing the spring/coil tension....more air....more fuel.
Disregard any aforementioned info already know
The Canadian '80-'81 Z20E had single plug heads and switched to dual plugs with the Z22E motor, although in the US, all California Z20E and Z22E had dual plugs, while all other states switched to dual plugs in late '80 or certainly for '81 with the Z20E. (this is as near as I can figure it out from pieces of info) The Z20E (dual plug) and Z22E heads are the same as near as I can tell also, with the exception of the temp sensor being moved from the intake to just above the #1 exhaust plug for '81 Z20E head.
If there are differences in the EFI ...
The '81 Z20E had an O2 sensor input to the ECU. I don't know if this was a US only thing or if Canadian models only added it again with the Z22E motors.
The '81 Z20E throttle body was different from the '80 Z20E, looking somewhat like a 2 barrel design. '81 and on? were similar to the KA and VG.
Doug, I think you have shown that the Z20E air box could likely be clocked too allow for a larger displacement motor. However the ECU's do have a different number... one each for the man and auto and two different ones for the man and auto California ECUs (O2 sensor?)