Currently I have the Rtek 1.8 with 680/750 on it..Going all 750's.(should be here tomorrow).
I got tired of ordering Parts to install a T4 turbo so I sold it all.I am getting a Stage 4 BNR Turbo to go with the Setup.
So?What do you Lads think?.will the engine be "OK?".
my exhaust is 3inch Corksport Downpipe to a Racing Beat Rev II system.(3 inch y to 2-2.5 inch mufflers).
thanks Guys,Styx.

 

Stage 4 with a stage 1 Rtek...hmm probably a bad idea to go that big of a turbo with no fuel control! Keep it under 10 psi and monitor the wideband.

 

Definitely an safc at minimum dave.. Might as well sell the 1.8 and get a 2.1. I told you to keep that 2.1!

 

I've always said it and ill say it again. If your running those band aid type of set ups for fuel, whether it's a Rtek, S-AFC, or the old school HKS AIC, with the GCC, and the Vpc, or HKS Fcon set up, and your still using the airflow meter it's a time bomb waiting to blow! Sorry for being blunt, but that’s just my opinion. After being in the rotary game for awhile and seeing all these different setups the only way to go is a Ems. Such as Haltech, Microtech, Wolf, etc, etc.
We can argue all day about this topic, but the fact remains the rotaries that are running hard and consistent on the street or track are running some type of TECH!
If you do decide to go with the setup you have already make sure to have it tuned on a dyno with a wideband just to make sure your playing it safe and running rich. Good luck!

 

You also might want to consider running a FMIC to keep those intake temps down, and also using a bigger fuel pump as well.

 

Front mount intercooler with 3 inch pipe.,Walbro 255 pump.
the Fuel setup is an upgraded parallel setup,with a Sard regulator.
..
If I go down to a Stage 3,will that be Better?
..I have attempted Numerous Times to apply a "EMS" on this car..(megasquirt,Rtek.2.1.,was gonna go Apexi PFC,or Haltech.) every time I DO,all of a sudden there is NO help.
that is why I am going BOLT ON and Go,,But The car will be driven..Soft and Hard..maybe a track,For Fun..the Car will not be RACED,.
anyways.lets see what the suggestions are ..
If someone can point me into a direction great..I need to Comprehend how the Ratios of fuel and timing are applied to the car,and If that is explained then maybe I have a Chance at a Programmable Ems.,but as I said,everyong goes to lunch once I try it..and Frankly it has been about $4K of Parts in and out the door just trying to get a Runnable Modified FC in my garage..
Thanka again guys..I await further info!
Cheers Styx.

 

why hasn't anyone said wideband yet?

S-AFC + wideband, the car should be ok for a while.

 

I am unclear of your thought process behind picking your parts. Pick parts that will fit into what you want to do with the car!

What is your target HP? How much boost do you want to run? Once you know that, then you can properly select the parts that will get you there. Just buying bolt ons and slapping them on is a recipe for disaster.

 

There is no ONE Right way, there are lots of ways to attain a certain level of HP or performance for that matter. In my opinion too many people go ***** to the walls with mods then blow up their engine and blame it on the Wankel. So...

Figure out what level you are at or want to be at. Then acquire the parts you need, but think things thru before you buy. Lets say, you want 300hp, you wouldn't go and get 1600cc injectors or a standalone ecu... you only have to modify/install parts that will sustain the power level you are at. Or go a little bit bigger on certain parts for safety/reliability. (fuel, cooling, suspension, +)

This site can probably clear a few things up for you...
http://fc3spro.com/TECH/FM2W/power.htm

This site can give you a better idea about how much injector you will need.
http://www.rx7.com/cgi-local/3rdgencalc.cgi

From what I understand, the Rtek 1.X series are best suited for stock turbo running higher than stock boost (+ fmic, exhaust, intake) . but the 1.8 and 4x750 should have the capacity for a hybrid turbo, but a BNR stage 3?(360 RWHP?) I'm not so sure. You figure out what horsepower levels that thing will flow/pressurize into your engine. You could get a BNR and run lower boost and probably be ok with the 750's and RTEK 1.8+AFC+WB 02 sensor. But the bigger you go the more you need to modify/upgrade.

Lay out your yellow brick road first, then start your journey toward OZ...

I agree with K-tune.
Keep the boost low and slowly work your way up (psi) keeping an eye on AFR's. Or go with 2.1 and ditch the AFC and actually do some of your own tuning (fuel + timing).

Have fun and Good luck!

FYI I drove around on a RTEK 1.5 on stock turbo overboosting for like a year while I acquired parts and knowledge about where I wanted to go performance wise, then finally put them all on and started tuning my own car with the 2.1 and Hybrid turbo, custom IC... Its been pretty rewarding and here soon I'll really get to see what more boost does...
Shameless plug. https://www.rx7club.com/rtek-forum-168/afr-tuning-methods-827389/

 

UPDATE!:My Budget pretty well 'mapped out " my Build.car is under snow for winter(tarped and Sealed!)
So I got the 750's in,currently on a Hybrid s5,Unknown.
For the upcoming season,it is a Stage 3 BNR with an Rtek 1.8.
Wideband O2.
engine is a TII,S5 keg with an Fd upper and a FMIC with 2.75 inch piping to 3 in and out at the cooler.
Wish me luck Lads!..Thanks!.STYX.

 

Get an afc of some sort or you're going to blow up your motor.

 

You do know that stage 2 rtek for s5 t2s is out now right? May want to pick that up

 

For S5?..My car is S4..(N332 ecu gone RTek 1.8).just the Keg part of the engine is s5.,well the internals too.I am running premix.
I had a 2.1 .
I bought the 1.8 because it was much simpler.plug and play.

 

So are you intending to run it at or less than 10 psi?

 

You can get one of those injector controllers and add an additional injector or two to compensate for the extra fuel needed.

 

I've got 2 months to think about it yet..The car is a Popsicle right now.
My idea is to work the bugs out and take it easy on the Engine.No heavy Footin' it ,until I get proper fuel..( it will be afterall a street vehicle..seein a track ..somewhere..sometime....).