Re: Upgrade to Fuel Injection
Boomyal....yes, you're basically driving around and making test runs with the laptop on and recording data from the entire system in all different operating conditions. On my racecars, my laptop is strapped to the passenger-side floor and recording EVERY run. That way I can fine-tune for each run as temp and humidity changes during the day to get peak power. But on a typical hotrod/street car setup (and pleasureboats, I'm sure), you just program it initially and basically unplug the computer forever (or until you need to troubleshoot a problem). <br /><br />Of course, typing and driving isn't necessarily smart or necessary...it just stores the data from a run, then you can reprogram while sitting still, then run again and compare the charts to see what's gotten better or worse. You use the software the comes with the kits to remap fuel curves, etc. I found the attached article that may give you a little snapshot of how it works.<br /><br />
http://chevyhiperformance.com/techarticles/90778/ <br /><br />As for 02 sensors, they're not totally necessary, but I've always bought their kits that have O2 sensor upgrades for my installations. It does give the computer more accurate combustion data and more fine-tunability. Again, I have no experience with their marine applications at all, but maybe they sell an O2 sensor upgrade kit for boats also? Best to call their tech support to ask how that might work.<br /><br />Surely somebody here has put a Holley 950 Commander marine EFI setup on their 5.7 Merc? Everyone's always hotrodding those. I'm surprised nobody else has piped in with their experience with the kit.<br /><br />After you learn the software, EFI is FAR, FAR more tunable than any carb. It's much faster than rejetting, etc, and you don't have to get dirty or smell like gas to do it...just type and click.
