Quote:
Originally Posted by big gear head
Such a cool car. I wonder how many people are left who know how to tune one of those FI units. My neighbor had a complete FI system in his barn until about a year ago. He's got a very rough FI '57 Chevy behind his house that the FI was supposed to go in.
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Like a blind squirrel, I can find a nut every once and again
. Honestly, there are a couple of guys over on Corvette Forum that are rather forthcoming with their knowledge. In fact, once I confirmed that the engine had good compression, good vacuum, and the ignition system was up to snuff.....it wasn't that hard.
The principles are very similar to a carb. Once I had the wires installed, I applied some base measurements to the lean stop and the power stop. That gives a spitball range from lean to rich. The car runs notably better after that (it was FAR to lean for a real stable idle). Without going real deep in the weeds, it just requires a good eye for detail. Once the weather comes around, I can tune it with a wide band O2 for a partial light cruise to full throttle / load.
I'm still going to pull the injection unit, double check the spray patterns on the injector nozzles, and install an anti siphon valve in the pressure side of the system to prevent a hydro lock situation. I've been there before and the connecting rods are not too fond of that.