We’ve seen a bit of buzz and have been fielding increased interest in this new development, so I’d like to set up a Q&A thread here, and share with you folks the detail you’d like to learn on this exciting new engine management solution.
Our new PortFueler EMS System for Slingshot is a unique offering in engine management. In cost and features, it's intended to fit in between a canned, unadjustable PCM tune, and a full programmable engine management solution like Haltech. It is a very proven concept which we have used for years with great success on applications from Dodge SRT-4 to Suzuki Hayabusa. This newest iteration of it for Slingshot is also accompanied by the introduction of our all-new PortFueler EMS module, which adds more capability than ever before.
The essence of it is simple enough: we add four additional injectors (via the StreetRace intake manifold), and the PortFueler Module, which is monitoring engine parameters, takes it from there. Of particular note is that the stock unflashed PCM and injectors stay in place, functioning as they ever did with their crisp, clean response. As the engine seamlessly enters the boosted condition, the PortFueler injectors come alive, providing a 100% tunable fueling and ignition solution. PortFueler can be used on either turbo or supercharged applications.
Two injectors per cylinder is a most desirable combination, and found on most all high HP boosted cars today. Splitting or staging the fuel in this fashion empowers us to use a much smaller injector for the machine to idle and drive about at low to moderate speeds. The advantage is that smaller injectors are more crisp and defined, and more consistent, in their low-speed capability than running a single large injector per cylinder.
As such, the PortFueler-equipped machine will idle as crisply as stock, with the same excellent drivability as stock. We’re not exaggerating when we tell you that this system idles and low-speeds better than any other boosted Slingshot we’ve encountered with large single injectors. It is quite evident, noticeably smoother with a nice stock 800 RPM idle speed and unrivaled driveability.
But when it’s time to pour to the fuel to it, you’ll have all the adjustable power you’ll need. The PortFueler EMS module is 100% tunable, individually for all boost levels and RPM points, on standard fuel and ignition map tables. Manufactured for Hahn RaceCraft by automotive electronics leader AEM, it is easy to learn, and supports all AEM datalogging and gauge logging functions, as well as features its own internal datalogging.
In its first trial, on @shortremovers spectacular Sling earlier this year, we progressively mapped out the entire boost curve a couple PSI at a time from 0 to 20 PSI boost, where it recorded almost 500 engine HP, putting 413 HP to the rear wheel…on pump gas.
While in doing this, we wished to prove the system’s ability to support high HP and grab some some max-effort bragging rights, it’s certainly just at home on a stock engine with a standard boost level turbo or supercharger…and as it is eminently capable of also handling higher power levels, it’s a perfect choice should one have aspirations to someday move up to a built engine and more HP.
Now that you have the basics, these two webpages show the products:
I’ll be here all day, so I figured I’d toss out some basics and see what questions come back. I’ll riff off of your interests and add more data and detail via my answers. Talk to me!