OrthmannJ wrote: ↑
Thu May 07, 2020 7:59 am
Since it was mentioned, I figured I might as well ask:
I've been considering an EFI swap for my F-100. It's a stock 360. I'm planning to switch to a 4 barrel intake and am weighing the cost differences between a good 4 barrel carb and fuel injection. All the Hot Rod garage/Roadkill shows etc show the host plopping a FiTech on the intake and making a few keystrokes on a laptop and boom it's running like a top. I know that's editing, but what are the potential issues of running a stock cam?
With FitTech there is NO laptop needed. Same for Sniper. You bolt it on, run your fuel system and answer a couple basic questions in a touch screen and your done. Stock cam is the absolute EASIEST to make work with a self learning EFI system. The reason is all these "Selflearning" bolt on EFI kits are basically a speed density system (same principle Ford's first gen EFI used like on the 351 and 460s). This system relies on manifold vacuum as it's underlying tuning table. Since it sort of cross references that with the o2 sensor it's not as sensitive as the stock Ford EFI which had a set map with very little adjustability.
The more aggressive the engine build is and the less average manifold vacuum you have the harder it is for these self learning EFI systems to maintain the correct A/F.
As I've mentioned before there are a couple drawbacks to systems like the FiTech or Sniper. However, on stock to average guy builds they work fine and I've used a lot of them. As power level goes up I don't like them as much and prefer something that has more features. Higher end EFI systems like the HP/Dominator can still be used in self learn mode, but what I like is you don't have to ONLY use self learn. If you don't want to or have the ability to tune with a laptop you can use the self learn mode. You drive for a bit and then save the self learn data as the base map. Then with your new base map you drive in self learn mode again and save that as the base map. After a few sessions you'll have a pretty decent map, then you can turn off self-tune and run it off the base map or run it off the base map with self tune still on but give it some limits on how much it can tune away from the base map. On stock/mild builds it doesn't matter really because the engine will run like crap before it hurts itself if the computer tried to tune itself off a cliff.
IMO, with a stock 360 there will be little gain in anything other than headers and a properly curbed distributor. The stock 2 barrel manifold is pretty good. The only other option that's decent for a stock 360 is a T or S iron manifold. The currently available aftermarket manifolds will actually hinder performance more than help it. With the exception of maybe the Performer 390 which is a fairly terrible manifold but wouldn't hurt a 360.
All that is a longwinded way of saying yes a FiTech or Sniper will work perfectly on a stock 360 and that is really what those EFI kits were DESIGNED for.