Hi, I've been looking at some supercharger kits and have noticed that some are non-DBW specific, including a kit that I was interested in getting. I've also seen kits made by the same company that differentiate between the DBW and non-DBW S2000s. I'd like to know what the differences in the kits might be as it relates to the DBW system on the '06+ model years. Any help would be greatly appreciated.

Thanks in advance,
Stephen

 

- Different AIT sensor location / mounting
- Different MAP sensor
- Different injectors
Fuel pump basket is different for 06-09 vs 00-05; some modification is required to fit a drop-in pump. SOS supposedly has some extra little bits to aid you in this. Also the system is returnless, in which case SoS also offers the in-tank fuel pressure regulator upgrade to bump your fuel pressure a few more PSI to lessen duty cycle at higher horsepower

Physically as far as the supercharger kit itself is concerned, everything should be the same.

 

...and one last thing to add to already comprehensive response above, Engine Management solution.

Some sc kits include a tuning solution, some have you source your own.

Sounds like you have a dbw car, and are looking at used kits which are often pre dbw specific.

In that case:

Engine management: You can use Flashpro. So you can sell the EM solution if the used kit comes with one, and buy fp.

Injectors: You need different ones than older kit will have. Sell the ones that come with kit (if any), and buy ID injectors. SOS sells a good plug and play harness (beware cheap harnesses. Many have lost engines due to misfires caused by bad harness connections. Alternative is cut old connectors off and solder new ones.)

Fuel pump: You can use whatever pump comes with kit (though made need to adapt to carrier as mentioned).

Fuel pressure regulator: Sell the one that comes with kit, and buy the SOS dbw specific modified stock fpr. Its only good for a few extra psi of fuel pressure, but better than alternative (nothing).

Head unit, brackets, ic, piping, hoses, etc: You can use all of this as is, with possible minor mods to some of the piping for sensor install.

Here is an alternative to consider:

If your dbw hp goals are modest (below 400whp), you can get away with stock fuel system, just injectors. Stock fuel pump, stock pump wiring, stock fpr. You'd need: flashpro. Injectors. The used kit minus the parts you can sell above.

For this modest build might need to fit a larger sc pulley to keep boost low enough for stock fuel system to keep up (or you can use an intake restrictor). This modest goal represents least expensive way to get into FI.

Then you have plenty of headroom to go big later.

If you're going to do something, do it right, or not at all. This 'lower' hp goal is a version of not at all, that lets you do it right later if you want more (meaning, if you're going to touch fuel system, go all in and overbuild for future expansion, or leave as is for now and keep goals modest.)

375whp is still an absolute beast compared to stock.

 

Thank you Car Analogy. You've been a huge help. It looks like I'll be looking into a lot of SOS's products like their fuel return system for DBW models, just to be on the safe side. I appreciate you taking the time to thoroughly explain the differences to me. I've been looking for information on the differences but nothing as comprehensive as this.

Thanks again.

 

Something to consider depending on if you have the ability to go about this:

I'd get rid of all of the EVAP stuff and do an EVAP delete and just run the evap simulator so no CEL, and here's why:

If you get rid of the evap system, you'll then be able to utilize the factory hard pipe under the car as a return line. This pipe is physically larger in ID than the return line on an Ap1 return system; I believe it's 3/8 vs the AP1 5/16, which is actually quite substantial. I personally had problems with fuel pressure on my AP1 due to the return hard line simply being too small for me. I've also noticed the AP2 hard line for the fuel feed is pretty large; it almost looks like it'd be the equivalency of a -8 feed. So you can essentially consider yourself having a -8 feed and -6 return utilizing the factory feed hard pipe, and the factory evap hard pipe as a return fuel line.

Here's what you can do:

Get the return-style fuel basket/hanger ~ like $60
Radium 06-09 fuel rail w/ plumbing kit ~ $230
Radium DMR fuel pressure regulator ~ $150

All of this would comprehensively let you run a fuel return setup. The rail w/ plumbing kit will allow you to keep your factory pulsation damper on the front of the rail, you'll be receiving an adapter to adapt your current factory fuel feed hard line to a threaded fitting that will accept their PTFE hose assembly, and a fitting for the center of the rail to use that hose as your fuel feed. For your fuel return you'll be mounting the DMR on the rear of the rail and just run an AN female to male barb fitting off of the bottom of the supplied swivel banjo fitting supplied with it, and run rubber hose to the factory evap hard line and use EFI hose clamps on it. At the other end of the hard line at the back of the car do the same, rubber hose to your fuel basket and use EFI clamps to secure it.

With this setup you'll have an overall better fuel return system in terms of components and expandability at less than half of the base price of the SOS kit with much less fuss.

Here's a picture of my current setup using the 06-09 rail on my 02. I opted to run this rail because I personally think it's the cleanest fuel rail on the market in terms of not looking too busy. It'll be set up the exact same way on your car. I have the Radium pulse damper on the front of my rail, but you'll be able to run your factory damper with the included adapter. DMR and return at the rear of the rail, and the feed fitting can be seen in the middle.






Also, with the EVAP hose gone off of the tube near the front of the intake manifold, you can then utilize that tube as your BOV vacuum line; literally shortest & cleanest vacuum line to your BOV ever. Here's how it is on my car:





Also, just to give you a visual representation of what I'm talking about, I pulled some photos from this guy's thread. Smart dude, made his own return setup on the cheap, but my way of going about it will be even less complex and much easier. https://www.s2ki.com/forums/s2000-mo...ystem-1197265/

 

Thanks Kyle, you've been a great help too. Now I'm leaning towards your way of adding the fuel return system or the member who's post you linked in your reply. Both are at least half as much as the SOS kit and putting the OEM one seems more plug and play but yours seems better if I ever decide to go E85.

Thanks again for all of the info.