After looking at all the options for twin turbos for our cars its either new stock twins,99 twins or these BNR twins.Heres my question though. Will you need a ecu upgrade if you run the bnr's at stock boost?

I have a catback,dp,intake and smic upgrade and being that the bnr's are supposed to be built much tougher I would like to go with them.Hence the question.

 

I too am very interested in these babies...

I think I read in an earlier forum that BNR was making a new manifold as well? It would be good to replace the old heat sink when putting new turbos on.

Anyone know what compressor wheels etc are used in these BB twins? Just wanting to compare it to another mob in Australia who are also creating a bb conversion.
Obviously I will choose the better version *grin*

I am looking for an extremely quick street car / cicuit car...drag racing bores me nowadays..(Been there before..) thus spool times are just as important as top end..

 

I don't know much about the new version of the BNR's, but you don't need an ECU upgrade for the older ones.

 

new manifold by bnr? first ive heard of it. sounds very promising though.Considering the negative effect of the cast iron turbo manifold on the engine.
I wonder if any owners of the new bnr's can confirm or deny the need for an upgraded ecu.

 

so what options does bnr offer as far as turbos ect (besides there stage 2 & 3)? and what kind of power are they rated at?

 

As a BNR stage 2 "victim" I wouldn’t recommend any rebuilt or modified version of the stock turbos. If you have your stock twins out either get a new set from Mazda, or look at options for going single .In the long run you will find out if you plan on modifying your FD the stocker’s just wont hold up. Old turbo design, shitty manifold, rat’s nest of lines, are many of the reasons to toss the old stock set up. On the bright side, Brian at BNR is a pretty good guy. He refunded me all my money when my stage 2’s started blowing oil. As for your question my recollection was stage 2’s were good for 300-340hp. I read about but never saw the 400 hp dyno achieved with a set of stage 3’s.

 

i have to agree but the new bnrs are a very different product from what ui have been told. Still no data on these though either.

 

wow thats the first time ive heard anything bad about bnr! anyone else have these problems or is this just a freak thing?

 

The original BNR's had an oil problem causing HUGE amounts of smoke. Brian eventually worked out the problems. However, it seems parts for these turbos are hard to come-by and expensive so Brian has gone a different route with his new sets.

There really hasn't been much more information that just that on the turbos. I really doubt you are going to get the information you seek without purchasing them.

 

why cant people running these turbos give me some feed back on them? anyone please? i would like to hear from more people on them!

 

There are only 2-3 people here on the forum with the new version (if that). The old version scared people with the smoking problems and the time it was taking Brian to get parts for the turbos, so there are only a handful of people with them.

A friend of mine had them. He put down 370rwhp at 17 PSI (all bolt-on's, PFC, larger injectors, etc). While that sounds good, another friend here local put down 360rwhp at 15 PSI on the stock fuel system with the stock turbos and Pettit ECU.

Could he have gotten more out of them? Sure, but don't expect 400rwhp out of them. Only a handful of people have come close to that with them and another handful of people have done the same with the stock twins.

While the older BNR's have a little more kick than the stock twins, they aren't a quantum leap of power of them which has been demonstrated by the few dyno's floating around. However, they will probably last a little longer at the higher boost settings than the stockers since that is what they are designed for....

If you want around 400rwhp or more, a single turbo is the way to go. If you want a reliable 350-385rwhp, then the BRN's are a good choice.

 

as far as power production is concerned i dont see any difference between the old bnrs and the stock turbos. Dyno sheets prove that. however there were a few guys that ignored the dyno results and said their "butt" dyno shows a large increase.....thats why i never bought them..not to mention the smoking problems. The maybe 10 rwhp (i really dont even think they make that much more then stock) didnt equal enough value in my mind to outwiegh the smoking problems and cost.
i am interested in seeing dyno sheets for the new set. Maybe these will be a better and actually worth the money. I dont know why brian at BNR wouldnt have this sort of info already.

i will tell you this...i wouldnt be too happy if i purchased these for $2300 and made 10 more rwhp at 15psi then my stockers.

 

sounds to me like we need to get a hold of the 2 or 3 owners of the new bnr's and see what they think and also what kind of numbers they are putting down.

 

There are only two people with the new ones that I know about: Garfinkle and Goodfellas. Goodfellas has already posted info about them and Garfinkle doesn't use computers.

I don't think Brian at BNR is ready for the mass market with them just yet.

 

I have sold a couple sets of the new stage 3's. I will try to get some feedback from the customer or have them post.

Jason

 

much appreciated Jason.I look forward to hearing about them as this may be the route I take for my turbo rebuild when the time comes.

 

Most people getting twins are either going to spend $2500 for stockers or $2300 for the BNR's. I'll take the new bnr's with the MUCH bigger shafts, higher quality seals, and much more durable thrust bearings then put the other $200 toward tuning

Bryan has sold a bunch of these turbos (about 20 sets) but most of the people arent on the forum and/or dont have thier cars finished. I've had a set sitting in my car for a while now but I've got a ton of other projects going on and its taking me forever to finish the car. The only car I personally know of with a set up and running and tuned is Rich's (Goodfella) car.

Remember....the new BNR's which are currently on the market are NOT rebuilds, he uses absolutly nothing from your old twins except the compressor housing and turbine housing...thats it, nothing else. Your compressor and turbine housings are modified to fit brand new turbos. They arent rebuilds. Just wanted to make sure everyone was clear on that. I've posted it a lot but the same questions and statements keep coming back up so I felt the need to say it again lol

Later,
Stephen

 

With the old BNRs I went out and made about 10 runs from 40mph to 140mph, datalogging them all.

I was consistently at 14.0 seconds flat.

When you get a chance, try it and let me know what you get.

Rich

 

david garfinkles car just passed emissions and will be getting tuned by the end of january. he has the bnr super callamacrazy stage 3's. his car feels so insanely fast its. . . insane. he ran it up to 17psi accidently and just about freaked me out. the boost response is amazing, faster than a single. . . and its nonsequential. will david hit 400rwhp??? dont doubt it. . . the real question is how close will he get to 500!!!!

paul

 

https://www.rx7club.com/showthread.p...7&page=1&pp=15

 

UPDATE:

david did a little mild tuning session tonight. . . hes got 275's in the rear. . . s03 pole positions. . . he ran it up to 3rd gear. . . started to get on it. . . goosed it a LITTLE (NO WOT!!!) and broke the tires loose. he went back and forth a few times. . . TRYING to keep the tires on the ground. . . well, he failed. anytime he gave it gas in 3rd gear at about 5500-6000 rpms it would break loose. . . sounds intriguing. hahaha

paul

 

rich...the old bnrs dynoed the same as the stockers...maybe 10 more rwhp, if that. Do you disagree?

SPO...anyone who goes out and spends 2500 on new stock twins should be shot.

As far as the new sets are concerned when i see dyno sheets of 400rwhp my check will be in the mail. You guys cant get upset with the fact that i want to make an educated purchase and not base my decision on someone saying my butt dyno thinks they are strong. I dont need to replace my stockers which made 340 rwhp @ 14psi on stock motor. I am looking to upgrade my power not replace failing turbos.

 

Breaking 275's pole positions lose in 3rd gear with not even going WOT....wtf?

 

Matt,

Nothing personal here at all, but I definitely have a strong viewpoint on this, so here goes:

I do disagree, and quiet heartily. You are implying that the BNRs and stock twins are similar, and they are not even close.

As you are aware, when people talk about dyno sheets they are referencing one data point---rwhp at one specific rpm, vice over a complete powerband. As you are also aware, dyno sheets are easily manipulated; where there's a will there's a way. With the exception of JD, who I am sure has some ace's up his sleeve, I do not think anyone has dynoed 400 to the ground on stock twins on a streetcar. Also, dyno results in my sig are from my old BNRs, for reference.

In the old analogy "actions talk, bullshit walks," action is something quantifiable like 1/4 mile times and trap speeds, and some timed high speed runs. Bullshit is a dyno sheet, where #s can be easily manipulated, there is no set standard among the many dyno manufacturers, and you are a slave to the weather. Not exactly an exact science......the stopwatch doesn't lie.

I say again, I challenge *anyone* with stock twins to go out and make a timed run from 40 mph to 140mph. It's not very difficult, some of us do this once a week or so. Let us know how you do. Actions talk and bullshit walks, guys

Rich

 

i know u and some other have a strong opinion but as i am sure u have guessed i do as well. And,
I still disagree with you about the old bnrs. One guy hit 400rwhp with the old ones. Most got 350-380. Tons of people got that on the stockers. I think you will agree that the avg full bolt on stockers make very close to the avg old bnrs without the issues. Those things didnt impress me and believe me i know all about avg horsepower and my take is that the dyno sheets were very very close.

I agree with what u are saying about 1/4 traps and ets however we both know they can vary greatly from driver to driver and location to location.

And your 40 to 140 test/challenge would be hard for me to perform as i dont have a data logging system and my car is away for winter.

This is my contention = BnR axed the old set b/c they werent worth the money and had problems.. The new set does prove interesting but until i get some dyno sheets i cant purchase them, unless of course i get some sort of discount for being a beta tester. As i consumer i simply cant purchase something without some sort of expectation.

in the end i think its pretty foolish of me to argue with you since u have owned all three ..lol. i just cant get passed what i have seen with my own eyes.