Sweet5ltr
Well-Known Member
At some point, it just comes down to - simplicity.
Simple gets you point (a) to point (b).
I've come full circle on this issue. Years ago I was a big believer in EFI, and the Holley Sniper kit I purchased worked exceptionally well - when it worked, which unfortunately wasn't for very long until it had an ECU failure. After being out of this a bit, I'm either modern factory OEM EFI or a Carburetor. Nothing in-between. It took me six hours of driving & tuning to get my Wife's mild 318 LA engine to hit all the big data points we like to see (14.5 idle / 12.5 WOT / 15.0 Cruise AFR) with zero bogs or hesitations, we've been driving that truck (77' W200) for the past year to work and around town.
Items I feel must be included in a Carbureted build to solve a few failure points:
MSD Ignition Box
Modern Denso Alternator (AR Engineering)
Fuel Filters - Pre & Post Fuel Pump
Carburetor Heat Shield
Return-line (or return Vapor line) for Fuel System
Cannot compare a modern GEN III Hemi to these older B/RB/LA engines. 345 - 395 NET Horsepower for just the 5.7 Hemi over the years, to me, this is one of the best swaps to go completely OEM EFI with a Mopar engine controller to a SB 727.
Overall, there is a trade-off to both systems. For a dedicated race car, I would go with aftermarket EFI. For a street car, Carburetor (B/RB/LA) or OEM EFI (GEN III Hemi).
Simple gets you point (a) to point (b).
I've come full circle on this issue. Years ago I was a big believer in EFI, and the Holley Sniper kit I purchased worked exceptionally well - when it worked, which unfortunately wasn't for very long until it had an ECU failure. After being out of this a bit, I'm either modern factory OEM EFI or a Carburetor. Nothing in-between. It took me six hours of driving & tuning to get my Wife's mild 318 LA engine to hit all the big data points we like to see (14.5 idle / 12.5 WOT / 15.0 Cruise AFR) with zero bogs or hesitations, we've been driving that truck (77' W200) for the past year to work and around town.
Items I feel must be included in a Carbureted build to solve a few failure points:
MSD Ignition Box
Modern Denso Alternator (AR Engineering)
Fuel Filters - Pre & Post Fuel Pump
Carburetor Heat Shield
Return-line (or return Vapor line) for Fuel System
Cannot compare a modern GEN III Hemi to these older B/RB/LA engines. 345 - 395 NET Horsepower for just the 5.7 Hemi over the years, to me, this is one of the best swaps to go completely OEM EFI with a Mopar engine controller to a SB 727.
Overall, there is a trade-off to both systems. For a dedicated race car, I would go with aftermarket EFI. For a street car, Carburetor (B/RB/LA) or OEM EFI (GEN III Hemi).
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