estevan62274

iTrader: (32)

I want to upgrade my turbo to either a stage 2 or stage 3.
I think i have the supporting mods to run a stage 2 BNR turbo....
Do you guys think i have what i need to run a Stage 2.
And what else would i need to run a Stage 3 BNR turbo..
Im looking to hit around 300-350 rwhp.... at 12-14 psi.. is it possible??

Thanks Steve

jkimbro

iTrader: (3)

720 injectors.....installing soon? 720's all the way around? How are you tuning it?

estevan62274

iTrader: (32)

I just got them a couple of day ago. i'm going to use the 720's for my secondaries. I have a SAFC II, and a M300 wideband

jkimbro

iTrader: (3)

Okay, SAFC and 720 secondaries won't yeild you the upper end of your 300-350rhwp numbers.

http://rx7.com/cgi-local/2ndgencalc.cgi

At 80% injector duty, you're looking at just shy of 300hp.

So, you'll need more fuel to hit those numbers to the wheels.

estevan62274

iTrader: (32)

Should i go with the stage 3 and keep the boost down until i upgrade the injectors?

jkimbro

iTrader: (3)

With your wideband you can tune it however rich/lean you want. Stay below 12's under WOT and you should be good. I'm banking under 12's on your AFR's won't allow for 300rwhp though.

jkimbro

iTrader: (3)

Ahh...and if I were you, i'd get a stage 3. It's only like 50 more bucks.

estevan62274

iTrader: (32)

Thats what i was thinking too, go with the stage 3 and upgrade the injectors.

estevan62274

iTrader: (32)

Any one running a BNR Stage 2 or Stage 3, on stock ports? if so what hp are you making and how much boost are you pushing??

89gt-x

If i were you, id figure out a way to minipulate ignition timing for that level of boost...just a thought.

88rxn/a

iTrader: (6)

*edit*

sorry didnt catch the s5 untill AFTER i posted!!!

adrock3217

I think, when moving on from the stocker...you should move to something higher then an SAFC2. Something..standalone-grade..or a little less.


Dunno if your running an S4 ECU or not...but, Rtek 2.0 is a very good solution. Also, a Megasquirt is just a bit more, but is a complete standalone.


I'd say..just as jkimbro suggested, running 720cc's all around. Either that, or replace those 720 secondaries with 1000cc's. Otherwise, eh, you won't be able to go over 8psi I'd say.