Really i thought it would be less, accually cost is an factor. as for a 10 second daily driver any input from anybody
Carb vs EFI on an LS1
If you purchase a complete LS1 engine you get most of what you need for EFI already on the motor, you can run the factory injectors/fuel rails/intake manifold/throttle body etc. No need to buy a good carb, intake, ignition box, convert to low-pressure fuel system, distibutor etc...
1) You can retain the factory style hi-pres EFI fuel system (just put a 255lph GSS340 style pump in the tank). So thats one less thing to change.
2) Just send the wiring harness off to get rewired and they will send it back as a 4-wire hookup plug'n'play harness with all your hook ups, gauges, relays etc prelabeled. Very simple. Any shop can do a PCM custom tune for the conversion. Youll spend a total of $400 on what you need here (wiring harness / pcm flash).
3) Your carb setup will likely make slightly less power than a LS6 intake or better on a LS motor. Most people have not had good luck in back to back testing with Edelbrock, GMPP, etc carb style intakes versus LS6 or better Fast intakes.
4) Everything about EFI just makes life simplier. One tune and forget it, better fuel mileage, drivability, adaptation to weather changes /w O2's/MAF/MAP. cold starts etcetc.
5) The plug'n'play EFI wiring harness gives you outputs to the starter, fuel pump & two separate fan relays (i recommend factory LS1 fbody fans and radiator), tach, speedo, water temp, voltage, obd-ii, a/c, check engine light, everything is a direct plug in.