If you are considering a supercharger or turbocharger for your 22R or 22RE engine, there are a few things you should know. The stock compression ratio on an 85-95 22R/RE engine is 9.4:1 and is really too high to truly take advantage of a high boost blower or turbo kit. You can run a turbo or supercharger on a stock motor with a factory EFI unit, but you must limit the boost to 4-6 lbs. The factory computer (22RE/2RZ/3RZ) just does not have the capacity to retard the timing and add enough fuel to properly manage a high boost supercharger or turbocharger.
A great investment, which will provide you with the right set-up, is with an LC Pro Fuel Injection Kit. This system will give you the ability to add more fuel (with larger injectors) and retard the timing during the high boost operation. It will also allow, with lower compression, to run up to 15 lbs. of boost with 2 BARS of M.A.P. If you truly want to take advantage of a supercharger or turbocharger, you need to lower the compression ratio to somewhere between 8.0:1 to 8.4:1. That can be achieved with a forged piston replacement, which will allow you to run higher boost. It is highly recommended to consider the lower compression and the LC Pro fuel Injection Kit when adding a turbocharger or supercharger kit to your 22R/22RE/2RZ/3RZ.