not too expensive at all. Do a google for Megasquirt. According to Jojje the whole setup can be bought for under $500. You have to do all the tuning though.
Megasquirt FI computer ~$300
Wideband Lambda sensor ~$150+
Used Throttle Bodies with injectors off ebay ~$50-200
You'll need a laptop to tune it, but you can set the A/F ratio you desire (should be 13-1) and the wideband Lambda sensor will adjust the fuel to match that ratio.
Megasquirt FI computer ~$300
Wideband Lambda sensor ~$150+
Used Throttle Bodies with injectors off ebay ~$50-200
You'll need a laptop to tune it, but you can set the A/F ratio you desire (should be 13-1) and the wideband Lambda sensor will adjust the fuel to match that ratio.
