Here is the pulse width graph for our fuel injection system, displayed on a laptop. Each value in the graph corresponds to a throttle position setting and RPM, and it is all infinitely adjustable. While this may have you hankering for your little SU mixture adjusting wrench and Unisyn synchronizer, this is the most fun we have ever had tuning a Bugeye.
For example, Russ and I drove around this week with the laptop plugged in through the firewall and he could tweak the mixture (and spark advance) any way we liked without stopping to open the hood. More importantly, we are no longer limited to a setting that impacts the entire rpm range, and we can instead custom tune any portion of the spectrum.
While this is all primitive when compared to a modern computer controlled car, this is such a massive step forward for these simple cars. No choke, consistent idle every time, easier starting, no hiccups, and if there are, you can adjust them out. This is the opposite of a down draft Weber on a Bugeye, which usually has transition stumbles that take away a lot of driving pleasure. You can adjust the Weber but without a dyno it’s a lot of time and hit or miss. With the EFI, we can precisely adjust the fuel delivery for the demand, and it works beautifully.
This particular car is almost complete and will soon ship to the customer in Michigan. First we’ll build some test miles (and show off). Here is Russ adding the electric fan, and photos of the hard tonneau now that it is painted, and the head fairing as well. Those items are available for your car if you like, and you can order them below! With just the hard tonneau, the car looks really great too!