at sevenstock 9 I was lucky enough to win the rtek 7 ecu upgrade certificate in the raffle. Im gonna wanna get the rtek 7 stage 2. so i know i will be needing to upgrade my injectors but i just wanna know if theres a brand u guys reccomend and also what the difference b/w high and low impotence injectors (which should i get). I basically need to know what i should get to complement the rtek 7 stage 2 upgrade. thanks.

what i have: S4 turbo II with exhaust/intake/emmisions removed

 

The stage II has a setting that will allow you to run the stock injectors if you wanted to. If not you can pick up a set of new 720cc injectors from rx7store.net for $110 each i think.

 

nice i didnt know that. so the fuel pump upgrade is neccessary also right? i was thinking walbro 255lph. once i get everything put in should i take it to get dyno tuned or is it easy to do myself?

 

You won a certificate for ANY Rtek?? That's pretty generous since the 2.0 is much more $$ than the 1.5 or 1.7 upgrades.

Also, You have a S4 TII right?

Then the rtek stuff.
The 2.0 is a modular ecu. It can run as stock or you can use a PDA to manipulate the fuel maps. Coupled with a wideband O2 sensor you can fine tune the stock fuel maps to make the best/smoothest map for your car. You can also data log your inputs so you can see of a sensor is within range or going bad.

It has stock injector setting, secondary 720cc, and I think all 720cc injector settings.

You should not increase your boost without doing the supporting mods. Fuel pump and rewiring it are big ones. Then get new injectors or have your stock ones cleaned and flow tested.

If you want to buy 720's you can find them cheap on ebay. I bought 2 for $135 shipped.

Depending on your engine harness and year of your car you will be high or low impedance.
This means that the injectors use a certain amount of voltage. High impedance takes a full 12v while low impedance uses resistors to drop it down into the 2-4 volt range.

The plugs have notches in different places to stop you from putting the wrong ones in your car. You can search for low / high impedance to find out more about this.

Generally 720cc injectors are going to be low impedance but the company on ebay has been selling high impedance ones as well.

 

thanks alot that was some good info. and ya im pretty sure its for any rtek because the certificate says any stage.