Wankel7

I just got done talking with Brian over at BNR and am trying to decide on which turbo to get.

The mods that are in the car now are:

Streetported engine
Greddy FMIC
Walboro pump
MSD Ignition
Will have Microtech or Haltech

Fuel - 720prim/1600sec
I have a wideband/egt

My goal with the car is 300rwhp. I want to go drag racing with her and autox.

The autox goal makes me lean more towards the Stage 2. However, I feel I might want more power with the Stage 3. He was saying that the boost control on a S5 Stage 3 isnt as good as a Stage 2 because of the S5 wastegate design.

Anybody have any input on what the Stage 3 is like in autox?

Thanks

James

1987RX7guy

iTrader: (3)

Gt35/45

OverDriven

If you only want 300 RWHP, then I would go for the Stage III.

BTW...your injectors are WAY overkill for the power level you are shooting for, but I guess it can't hurt as long as you tune it properly.

-Joe

Wankel7

I dunno...it seems like that is also possible with the stage 2...


This set up has dynoed 332 RWHP at 14 psi of boost, also has ran an ET and MPH of 12.3 at 114. The car will reach peak boost around an estimated 3800 RPM.


And yeah, I suppose the fuel is overkill. However, the 1600cc injectors are 10 bucks cheaper than the 720cc on rx7store.net. So, what the heck!

James

Tierce

would a bnr turbo be better than running a t04 of some sort?

ddub

GT35r with your port and you should be good to go for 350-400 whp with other supporting mods.

ilike2eatricers

Well the main advantage of getting a hybrid is that it bolts to the stock manifold which no other aftermarket turbo does. A full to4 setup will be better but the price goes up dramatically from a hybrid since you need to buy a manifold and wastegate as well. Probably even oil/water lines too. Also with a full turbo setup you probably want to go full standalone as well to protect your investment and get the most power out of it.

Tierce

so do you have to send your turbo to them for getting that done?

ddub

For a BNR? Yes.

Madrx7racer

wat's their contact info?

J-Rat

iTrader: (2)

J,

For autocross etc, you are going to want a smaller stage. The stage 4 is a great turbo, and I dont regret its purchase, but it would KILL you in autocross!

Wankel7

Rat yeah, I was in such a hurry to post this thread I ment to say stage 2 or 3!

Thats what brian was saying So , I am guessing a stage 3 would prob be the same way as far as sucking hard for autox

JAmes

J-Rat

iTrader: (2)

I dunno.. I have heard alot of people complain about how thier BNR has crappy spool, etc etc... But they probably just slapped that bad boy on, and figured thier car was ready go burn up the 1320. Same mistake I made.

Thing is, with proper tuning, that turbo is a wonderful unit! It will lag, there is no getting around that, but its not half as bad as some of the other bigger turbo setups I have seen. I have also (and cant explain why) picked up some spool when I went from TMIC to FMIC.

gsracer

my old turbo was a stock s4 with the twin scroll removed

my current turbo is a s5 upgraded to the stage II (h3 compressor wheel, stock exhuast wheel clipped 10 degrees)

The hybrid spools up faster than my old turbo

Wankel7

That is great to hear you went with Stage 2. That is what I am going to get!

You get her on the dyno?

What intercooler you running?

What AFRs have you tuned for? Or EGTs?

James

gsracer

Haven't been on the dyno in a couple years. I plan on going to the strip in a couple of weeks, hopefully I'll have some decent trap speeds to report.

Still on the stock intercooler....hoping to go front mount by summer. Currently tuned in the high 10's due to being on the stock interheater, and naturally being conservative with my engine. Past fuel cut I retard ignition 1 degree per pound of boost.

It's not a rocket car, but it's certainly pretty quick. With a decent launch I'd expect high 12's currently.

Wankel7

Get ER on the strip man