I was reading through some posts and noticed bryan from bnrsupercars referred to a gentlemen making upwards of over 425+rwhp with the stage 2s? Did he ever confirm this? What size injectors would be needed, 1300cc secs? Im guessing on a stock rebuilt engine (no port) with intake,dp,mp,cb,fmic,injectors,fuel pump,bnr stage 2 twins and 15psi i would make around 410rwhp? Are those numbers right?

Im located in Cali and would need to get the twins tuned, is XS still all booked up for dyno tuning the PFC with the bnr twins?

Thanks for taking the time guys.

- Danny

 

Danny,

Here's the list of what I'll have once the FD is finished, maybe it will help you. Some of this stuff I already have and the rest is on the way. I'll be running a rebuilt motor with mild streetport, intake, MP, DP, exhaust, FMIC, PFC, SBC-ID, BNR stage 2, 1600cc secondaries, walbro 255 pump, efini Y pipe, and running 16 to 17 psi. With all of that I was quoted power around the 420 whp mark. I do hope that helps. I would recommend the 1600 secondaries vs. the 1300 though. Best of luck.

Zach

 

Sounds good zach. Im guessing maybe 400 even with no port then and the 1600 injectors?

 

Yea they are supposed to be able to go 400+. A few people have gotten them and are waiting for dyno sessions. There should be results on both BNR's and M2's in the next month.

 

ooooo sounds exciting, lets see some dyno action

 

Danny,

The reason that I favor the 1600cc injectors over the 1300cc ones is the simple fact that the 1300's are not a stock part. They are modded smaller injectors. Just like any car part when you mod it you have a greater chance of it failing. And on a rotary, your injectors are something you pray will never fail. The 1600's are a stock Bosch part and are extremely reliable from all I've heard by people who use them. I hope that helps. I think 400 would be an easily reachable goal for you though.

Zach

 

plus the 1300s will start to hit the upper limits of their range at around 400hp.

if you plan on hitting 425 plus go with the 1600s and the rail.

Im looking forward to seeing if the bnr set performs at least as well as the m2 upgrade.

so far...word on the street is that it takes a while for them to boost.


j

 

art, it depens on who you talk to. When I first got my BNRs installed the lag was tremendous. It was so intrustive I was consdiering extreme measures to rectify it. But after some more considereation and tuning I've got them in a much more comfortable range. I get get 5psi by 3k, 10psi by 3.7k and I'm at full boost 13psi by 4200. And they pull like a pack of wild dogs from there on out. Can't wait to actually get these things in their efficiency range ~17psi+. Myself or one of the other hanful of guys should have some dyno numbers in the next week or two. Keep posted.

 

Are you running them Seq or Non-Seq??

-DAn

 

4200 yikes!!

thats too late for me....no way I could drive like that in the city...

that must be non seq...and I bet it is a blast at the track.


j

 

Yeah, they are non-seq. To be perfectly honest, for the first few weeks it was a little annoying, but once you learn the new "gear selections" you'll be using, you never miss the lower power.

 

Lost time,

You are running the PFC right? Who did you have tune it for you? I think XS is the only place in SoCaL that can actually tune the PFC correctly, and they seem to be pretty booked up lately.

From this list, is there anything I am missing that I would need to run the stage 2 twins and not end up running lean or anything? intake,dp,mp,cb,pfc,fmic,1600cc injectors,and fuel pump.

I think full boost by 4200rpms is fine. How often are you under below 4000rpms when racing? By the time you redline 1st and hit second you are already around 3500rpms...500rpms and you got full boost through the rest of the gears. When you are making 400+rwhp I dont think minimal turbo lag will be an issue. You will still walk Ferraris, vipers and BPU+++ supras their asses....

 

You could run the turbos with no fuel system upgrades at all, but you'd be restricted to 10psi. When you want to turn the boost up you'll need larger injectors (either the 1600 secondaries that you've suggested, or upgraded secondaries to 1200/1300, or run 850's on all four). When you start getting to the bigger injectors, 1300-1600 is when you're going to start getting to the limit of the stock fuel pump.

As far as tuning, I'm in South Florida and I'll be damned if I'm going to send my PFC away to get tuned when it's not attached to my car so myself and a buddy made some maps from scratch. I've been using these without problems until I get a datalogit and a wideband of my own.

I hope that answers all your questions.

 

I have the walboro 255 pump, so I dont think it will be a problem for now. I will probably end up getting the Supra TT pump in the future. The only thing I am cautious about is tuning. I guess like you said I can drive it on 10lbs of boost untill I get some dyno time in. Oh well, everything takes time. Thanks Lost time.

 

That Walbro is good for 500HP. It'll be all you need even with the bigger injectors. As long as you stay around the 10psi mark you should be ok until you can get on the dyno.

 

My car's transformation from to shall begin. Lost time, when you get your dyno numbers, can ya PM me with the results?

 

I am anxious to see some dyno #'s from the M2 and BNR twins, they are both very nice setups that will certainly improve over the stock twins. However, that being said, I will be quite surprised if anyone makes 400RWHP at 15psi w/o some insane porting.. 400 may be available but I bet it would be at a higher boost level. Just speculation though, I welcome the thought of becoming a naysayer and being proven wrong.

Matt

 

i agree with matt....400hp is possible more towards the 18lb range on the m2 set

matt...they posted a dyno sheet for a stock motor fd over in the m2 upgrade thread.

358@15lbs and plenty o power down low....with a street port he would be in the 380 range at 15lbs Id guess.

j

 

I'll be sure to put up the sheets once I have them.

 

I've been told that the BNR stage 2 would dyno in at 420 or so set at 17psi. That was the report that came from one of the BNR guys that was at a track day. While I already have a mild streetport, that should be an easily attainable goal.

 

as long as the manifold doesnt restrict flow like everyong thinks it will. cant wait to see....go for broke!


j

 

Artguy, you can trust that I will be going ballz to the wall once I get all the prelim stuff out of the way. Best of luck to whoever else is going this route. Laterz.

Zach

 

art, it seems that all of us are counting on the exhaust manifold being the bottlneck in this deal sooner or later. We'll definately be flowing more than it can but at what boost level?? I guess we'll find out.

 

My BNR twins are are being sent back to KDR this week to be installed. I was running non-seq BNRs at 9-10 lbs of boost and pulled a heavily modded LS1 from 60-110. And on my dyno sheets I dropped power after 5500 rpms due to a leak. Bryan put new compressor wheels in which increase tip speed (spooling) and produce the same power. He put in non-clipped turbine wheels which should be less power than clipped wheels but have substantially more low-end power than clipped wheels. I'll be running these sequentially so I'm expecting full boost by 3K rpms or so. Since I have a HF cat and non-clipped wheels I should be right around 380-400 rwhp at 15 psi. We'll see. Dave at KDR is a conservative tuner so I'll be happy with 380 rwhp. They should perform very similar to the M2 set that artguy runs.

 

Very nice sounding kwik. Very nice. I believe that sequential run BNR stage 2's with 17psi and clipped turbines should easily be capable of 430 to the ground. Don't you think?? I have been waiting to talk to someone who was running those. PM me or just write back in the thread when you get the chance. Laterz.

Zach