I have a 1967 Chevy C10 pickup which I would like to convert to electronic fuel injection.
The engine in question is a 292 cubic inch inline 6 cylinder -- a somewhat rare motor.
VEMS or MegaSquirt?
My decision to use VEMS over MegaSquirt is twofold:
- I already have experience with Atmel AVR microcontrollers
- I know C
Manifold
As there was no version of this engine (that I am aware of) which came with fuel injection, there is no existing manifold which supports port injection.
There is the option of purchasing a performance manifold which can mount a 4 bbl carburetor, onto which a tbi assembly could be mounted. However, I have no desire to spend $300 on an intake manifold.
I will be taking a welding course in march (8 weeks from now), at which point I will be able to fabricate my own manifold. This will tie nicely into a book I am reading, "The scientific design of intake and exhaust systems". My plan is to make a tuned intake for optimum highway efficiency.
Use existing manifold?
Well, it turns out that 1bbl fuel injection throttle bodies do exist, which means I may be able to get this project off the ground using my existing manifold.
According to the [wikipedia page on the iron duke], the GM 2.5L inline 4 was fitted with a single injector 1bbl throttle body which had many applications in the 1980's.
At first glance, the mounting gaskets appear to indicate this may be a simple bolt-on solution:
Time to hit up the junk yards and get my hands on one so I can take some measurements.
Post Injection Vaporization
started a page (PostInjectionVaporization) to discuss implementing this.