SAFC II on a 4ag 20 valve (silver top)

[LAC99]

Some of my friends are telling me I should buy a SAFC II for my Levin 4ag 20v silvertop project. So far the 4ag has a port & polish job, a little more compression than stock (11-1), header and a lightweight flywheel. The thing is I´m not sure that a SAFC will make a difference in the performance of the engine. I would really apreciate your comments

[Ivan141]

If you need to be sure, get yourself a wideband O2 sensor first.. you cant tune the engine with an SAFC or whatever else you put on it decently without one anyway.
When you have the sensor you´ll be able to see where more fuel is needed easily.

For the rest I think an SAFC might be a simple way to tweak the injection a bit if you´ve already got the 20v ecu anyway. I doubt it will need dramatic changes in fueling.