So I am relatively new to the rotary world but I ran into a guy that wants to sell me a used bnr stage 4 turbo and an rtek 2.1 ecu the car right now is stock other than a fcd custom intake and a full rb exhaust he said with that ecu and turbo he was running 350-400 whp what injectors will I need to run this and what will I need to see the same hp figures? All help would be appreciated or any input thank you

 

upgraded fuel pump... probably 720 primaries 1680 secondaries. You might be able to get away with 550 stock primaries. Oh... get a wideband o2 sensor so you don't run too lean and blow it up!

 

You can NOT vary the primaries and secondaries too much on the Rtek 2.1 or the transition will be like crap.
Rule was about 25% variance.
850 and 1200's would be a good transitional setup.
I had 750/1000 but ran out of fuel on my stage3.(duty cycle was like 95% and very IFFY.)

You can get better info in the RTEK section of this Forum.

 

Whats a good wideband to use? And is the rtek pretty easy to use? I will eventually figure it out but ive never actually tuned maps and timing etc. Its a little scary to me and would I have to run a boost controller or does the rtek have that

 

I was running a bnr stage 4 on rtek 2.1 4x1000cc injectors and still ran out of fuel correction on 12 lbs

 

its not hard to use, its time consuming. do some reading before you jump into this and see if its something you want. and no the rtek does not have a boost controller, you can however(MUST) remove your FCD as the rtek has that built in. im still plugging away with mine, small adjustments take it for a run, more adjusting blah blah blah, as for as a wideband goes everyone has their preference, im just running an Autometer. Not sure if mine can be used to datalog though as my output is 1-4v and everyone is saying you need 5v. but alot of guys run the Uego from AEM but i have no experience with it so no input.

But all in all, do some reading. the BNRs have been covered and there is a whole Rtek section here: https://www.rx7club.com/rtek-forum-168/

 

Thanks for all the help guys he says he will sell me 680cc primaries and 1000cc secondaries and he said he bought yhe car with those on it but never really tried it out before he got his new set up he also has water meth injection greddy bc Godspeed radiator aftermarket clutch and flywheel and a twin turbo supra fuel pump and also its a t04e hybrid turbo any thoughts??