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SavageGrizz · 04-20-2017, 11:53 AM

What Mongo said.... Running a carb is for those who don't want the "extra" electronics, but you have to run an MSD box anyway (unless you do the EXPENSIVE manual distributor option which is mostly for racers who aren't allowed to run spark boxes) or for the look of an old school rod. The LS blocks don't have a mechanical fuel pump like the SB/BB's do, so if I'm already having to run an electric fuel pump; I may as well take it one more step and enjoy the benefits of EFI. On the other hand, if you already have a good carb just laying around you can save a bit of coin and minimize your electronic foot print; but the performance difference is negligible. "Drive-ability" with EFI is incomparable to a carb though.

I'm terrible at re-jetting carbs and am much better at adjusting fuel tables and AFR's with mouse clicks and key strokes ;-) FAST and Holley both have decent and "relatively" inexpensive throttle body based fuel injection systems which sit right on top of the carb manifold.

If my junkyard motor still had a decent set of injectors and the truck plenum didn't break in shipping, then I would probably just re-use it, but for $1250 I'm gonna give the Holley Sniper kit a go.

04-20-2017, 11:53 AM	#11
SavageGrizz Registered User Join Date: Nov 2016 Location: Sherwood, OR Posts: 6	Re: LS vs small block What Mongo said.... Running a carb is for those who don't want the "extra" electronics, but you have to run an MSD box anyway (unless you do the EXPENSIVE manual distributor option which is mostly for racers who aren't allowed to run spark boxes) or for the look of an old school rod. The LS blocks don't have a mechanical fuel pump like the SB/BB's do, so if I'm already having to run an electric fuel pump; I may as well take it one more step and enjoy the benefits of EFI. On the other hand, if you already have a good carb just laying around you can save a bit of coin and minimize your electronic foot print; but the performance difference is negligible. "Drive-ability" with EFI is incomparable to a carb though. I'm terrible at re-jetting carbs and am much better at adjusting fuel tables and AFR's with mouse clicks and key strokes ;-) FAST and Holley both have decent and "relatively" inexpensive throttle body based fuel injection systems which sit right on top of the carb manifold. If my junkyard motor still had a decent set of injectors and the truck plenum didn't break in shipping, then I would probably just re-use it, but for $1250 I'm gonna give the Holley Sniper kit a go.