The cdi is an ignition box, it will raise the rev limiter of your machine and it also provides a different timing curve.

The FS is a fuel controller and you would use it to change the fuel rates based on modifications made to your machine.

You would use both of them to get aal of the performance out of your RZR.
We stock them!

 

thanks for the info do i need them all but what about the FI. All i have done is an exhaust and an intake. Im talking to dale from dirty dawg about a cluch kit. I run mine hard, woods and some fun racing, dont know if i need all of it. what do you think?

 

In my searching on the Dynatek products this is what I found.

The Dyna FS (what everyone is calling the "CDI") is the piggyback ignition that raises the rev limit and changes the timing. They offer an accessory product, the DRSP-1 that plugs into the DFS that allows for fuel tuning and selecting different advance curves. It also includes programming software so that you can do your own custom settings if you want or need to.

The FI Controller is a piggy back device that only allows for adjusting fuel.

I guess which one you pick depends on your present and future needs. I like expandibilty so I am going with the whole DFS setup when I get the $$.

 

If you have changed the amount of air going in and/or the rate that the exhaust exits the machine you will need to compensate with more fuel (more air + more fuel = more horsepower). The way to add more fuel is with the fuel controller. If you have not changed the CDI then you will still hit the rev limiter so adding the intake, exhaust, clutch kit and fuel controller will only get you to the rev limiter quicker. The CDI will bump up the rev limiter so you can get more top speed with a slight change in the timing curve.

 

here is how it is. u can have the fuel programmer and the fuel programmer only or u can get the dyna fs programable unit which installs the same as a fuel programmer would and piggybacks onto the ecu. buy the fs and then later add the programmer unit for the fs which is basically the fi in a nut shell. it has low mid and top end fuel adjustments as well as 4 preset programs is u dont wana buy a wideband air/fuel gauge ti fine tune it. and the Dyna fs ignition module does adjust your fuel slightly as it stated on the website. your best bed it the FS unit. i run it, i love it.