Stage 3 BNR
 

I hear that STAGE 3 BNRs in sequential get full boost at 4500 not 2200-2500 or so...true or false? I don't see too many people on here with sequential BNRs.

False....They prob get full boost in NON-sequential at 4500.

Where did you hear that? There are only a few of us running seq and none of us has ever posted anything like that.

The BNR sequentials spool about the same as stock. Most veteran members here know how adamant I am about the sequential setup and I have zero complaints about their spool.

rynberg,
I've been meaning to ask you how you liked the sequential BNRs? I am thinking of going with this setup for my new 7. Are you simplified sequential, and what kind of power are you making?

-Dan

I 2nd That
 

I'm putting my engine back together right now. I don't really want to fork out another $2,500.00 or so right now, because that will delay me from getting it back, but my houshings are cracked, so I'm going to go back with some stock twins. I would like to upgarde before the end of the year and was wanting to know if the BNR's were worth the money. I would never go with a single, so I'm not really left with much of an option. What was your price, and how long was the wait?????

Dan, I am full sequential, have to pass emissions in Cali.

Look at this thread:

https://www.rx7club.com/showthread.p...light=ignition

I'm going to be finally getting around to posting some threads about last year's major rework of the car pretty soon. I'll be posting threads about the BNRs, Zeal coilovers, Stoptech/99 brakes, Raceshop rollbar, etc.

Along with the two links in my sig, here is some good reading on the BNRs:

http://www.bnrturbos.com/3rdGen.htm

Also, they go for $2350, not $2500 :).

I want these, so we can't use synthetic with the BNR's though right?

I never used synthetic on mine anyways reguardless of the warning or not. I had thought synthetic not the wisest of choices as far as oil goes for our cars.

T.c.

I thought so....the guy I was talkin to that worked on a CYM that had BNRs, he said they were sequential but he told me they boost full at 4500 and I was like....yeah that sounds like a non sequential run...but he assured me it was full sequential...by the way anyone ever hear of ....innovative turbo system? He was recommending this turbo right...becasue he was building a TII with a heavy ported RE motor and he said that even with stock ports this turbo woudl still spool at around 3200 to 3500 rpm and woudl be better for everyday driving and would be able to push higher numbers with lower boost...I told him I was only looking to really make 325-400 max....but he said these would be perfect for me...what do you guys think?

http://www.innovativeturbo.com/pages...asp?sku=GT72BB
http://www.innovativeturbo.com/pages...=GT70BB-Billet
http://www.innovativeturbo.com/pages...asp?sku=GT70BB

Keep in mind I am lookign for more of a Auto X and track setup for my FD with some crusing...

^^^that guy/mechanic is flat out wrong, or the FD has a serious boost problem that he should be working on.

The BNRs setup sequentially will outspool any of the decent-sized single turbos out there---listen to Rynberg, the man knows his stuff :)

Then you should definitely stick with seq twins...a larger single (T70) will be horrible for auto-x. Like I said, the BNRs will spool pretty much the same as stock twins.

Yep, and thanks Rich. Keep it up and all the newbs will believe it.... :D

I think he might thave been confused thats all...apparently steve Kahn had tuned this CYM...I was originally planning to go with the BNR stage 3s in sequential becasue I wanted the quick spooling of the twins and didnt want to have to redo the ENTIRE turbo setup...what do you think of those turbos though?

what kind of spool up times do t70s see by the way....I only bring this up becasue I am finally putting everything back together in my car and I know the turbos are most likely gunna die hard this summer....the primary already has a ton of play in it...though I know a BB turbo will respool quickly becasue of the BB setup...like when I am coming out of a turn and what not...

A T-70 on a 13B stock port motor will have a horrible powerband, like 4500 to 7500.

Esp for an auto-x/street car, the BNR3s would be ideal. You can make 400+ rwhp safely and reliably with them, and you get great spool at 3k rpms. Plus, they are cheaper than a quality single kit. What's not to like?

Not to mention all the BS you don't need like you do with a single set up.

^ i thought a single set up was simpler?

Single is definately simpler than the BNRs in a sequential configuration. With the single you get rid of everything under the UIM...ALL of the solenoids in the rats nest. It makes the vacuum lines incredibly easy to trouble shoot.

I still plan on passing the sniffer emissions with my single...it just won't pass a visual (which is ok here in AZ, but would be a problem in CA). I think that passing emissions has a TON to do with tuning and the right Cat. Much moreso than exactly what turbo you are running.

I looked at the BNRs when I made my choice. But I track drive my car a lot, so I wanted the simplicity of non-sequential...I would rather have a medium sized single (500R or GT35/40R) than the BNRs run in non-sequential.

If you are looking to stay sequential, there really is no better option than the BNRs though. They have certainly proven themselves!

Cozmo, I agree with everything you said. As big a fan I am of seq twins, my car is becoming more and more a track car, and the simplicity and cooler running of a single turbo is appealing. If I didn't have to worry about smog inspections, I would have STRONGLY considered a GT 35/40 over the BNRs.

Of course, there is the matter of cost, as a fully outfitted GT 35/40 install would have cost a LOT more than the BNRs, which are drop in.

What some people don't realize is that converting to single is not just take all the vacuum lines out and the sequential stuff off. You also need to get it tuned, and if you want to pay someone that is another $300+ to go along with it.

The main reason I went BNR is because my stokers were shot, BNR is about 10mi from my house, and I had a track day in 3weeks and I didn't have enough time to get a single, put it in, and get it tuned. Also they are cheaper. I also like the seq. set up.

As far as non-seq vs. single I don't see how that is a comparison, single all the way. It spools way sooner. If I ever have problems and can't fix the seq., which I don't know what that would be, I plan on going single. I don't see why you would buy twins and run them non-seq, unless you just had to pass a visual test.

How can you say a single spools 'way sooner'? There many many different sizes of single turbos. The BNR3s run non-seq make similar power to a Greddy T-78 (turbonetics T-66) at the same boost levels and have a similar spool time. Steve has tuned countless FDs with all kinds of setups and he made that comment to me during my last dyno session----at the same boost, BNR3s and Greddy T-78 dyno graphs look very similar. If you want a smaller single that will make less power and spool sooner, than that is one good reason to run the single.

To answer your last point, back when I made the decision to try the new 3s out non-seq, I was sick of all the seq components and associated potential boost problems, and wanted to make 400+ rwhp without spending an arm and a leg. My setup has definitely satisfied those requirments. Although I will admit the thought of switching back to seq and having boost at 3000 rpms has entered my mind.....I just wish it wasn't so much of a pain in the ass :)

Rich

rich,
i don't think trispeedfd realizes that you have different seals (i think dynamic seals????) on your bnr's which allows you to run synthetic oil correct? but didn't they say that they have gotten a little bit better numbers with carbon seals???

josh

Speaking of BNR's and syn oil... I plan on someday upgrading my twins with BNR's. I'm pretty sure my twins are original and they have 131k miles on them. What did it take to get the makers to change the seals to run with syn oil? Money, time, strippers??? I'd really prefer to run synthetic oil in my car.

You just lost me there. So you can change the seals to be able to run synthetic? Tell me more please. =o)