St2suit
Registered Member
I have a 1976 K5 with a 350 crate motor that I’m considering moving towards fuel injection but not sure where to start or what to look at. Any help or direction would be appreciated.
CK5
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1976 K5 interest in fuel injection
- Thread starter St2suit
- Start date
It really depends on your experience and willingness to learn.
GM TBI-based setups have a proven track record of OEM-level reliability but lack the ability to tune or adjust to changes on the engine. Changes like cam, intake, heads, and upgraded exhaust. Retrofitting an earlier truck would require the TBI tank, fuel lines, and a harness to go with the rest of the TBI engine parts. Many a DIY person did this exact upgrade for years before the whole LS swap the world stuff came along.
The performance aftermarket has come to the game with similar Throttle Body-based injection systems with self-learning/tuning ability. FAST, Holley, and others play in this realm. They have options for a secondary fuel reservoir up front to put a higher pressure pump into so you don't have to change the existing tank, but the smarter option is putting in a factory-style TBI tank and pump of the correct pressure for the system you are using to simplify the installation.
Still, TBI-based systems are limited as it still is not as efficient as a multiport injection system. Edelbrock sells a really nice setup that is also self-learning but also tunable if you wanted to go down that rabbit hole.
Depending on what you want to use will dictate other items for the engine like in the ignition/spark department. A GM-based TBI will require the TBI parts for the distributor, coil, and the rest of the sensors. A more basic aftermarket TBI system may not have the ability for timing control, so a basic non-points style Dizzy with mechanical and vacuum advance will work. The higher-end TBI systems and the Multiport will have timing control and will require a dizzy that a computer can control.
The sky is the limit for sure. But it still really comes down to how deep you want to go into it.
What carb is on the truck presently and why not just keep it?
Go holley sniper EFI
No offense, but I would do homework before buying that
I don't, nor have I ever owned one, but I have heard of so many people having problems with the Sniper units, on here and locally, that I would skip them.
Sounds like the Terminator controllers are pretty good, though.
I have an Edelbrock PF4 which works well, but I would like to have a little more depth of parameter adjustability.
Quadrajet...
I love my TBI set up, altitude is fine along with all the crazy angles I’ve had it at. I didn’t change the tank. Mine had TBI on it when I bought it but It was a pieced together mess. I found a place that cleaned and rebuilt my TBI then sent me a new wiring harness, new ECM and all the sensors.
I have used msd atomic and fitech. Been happy with both. Currently doing a fitech swap on a 56 Ford wagon with a y block. Pretty straight forward to setup. Takes a bit of a learning curve if you don't have any experience. Pump in tank is the better option. Edelbrock pf4 have pretty stellar reviews too. I'm a giant fan on having fan and timing control as well .
