3rd Generation Specific (1993-2002) 1993-2002 Discussion including performance modifications and Technical Support Sections.
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BNR Stage 3

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Old 05-12-10 | 12:29 PM
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MD BNR Stage 3

It seems I will have to replace the stock turbos soon and was wondering if this was a direct replacement for the stock set up, and what experience anyone has had with these turbos.
Old 05-12-10 | 12:33 PM
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Old 05-12-10 | 12:37 PM
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Old 05-12-10 | 12:47 PM
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short answer is no, buy my new twins, lol
Old 05-12-10 | 12:51 PM
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Originally Posted by 93RX7black
It seems I will have to replace the stock turbos soon and was wondering if this was a direct replacement for the stock set up, and what experience anyone has had with these turbos.
It's a direct replacement in the sense that they bolt up to the engine. However, the y-pipe does need to be modified for the turbos (which is also done by Bryan).
Old 05-12-10 | 02:24 PM
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Yeah, I guess I was more meaning that it doesn't require thousands of dollars to do like a single turbo, since this is a twin turbo kit and can still be set up sequential I just thought it seems to be the best replacement for the stock setup without having to spend so much more. I would be having Kearney Automotive installing the turbos in capital heights, md. They have given me an estimate for installing the Japanese spec turbos at 600, and didn't know how much of a difference there is in installing the 99 Japanese spec turbos vs the BNR stage 3s.
Old 05-12-10 | 02:33 PM
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The install would be the same. No disrespect to Bryan at BNR; but if you are only planning to just replace the turbos and keep them sequential, I would recommend just getting the 99' spec turbos. BNR's are a great alternative for those who live in states with visual inspections and want to go non-seq for single turbo like power.
Old 05-12-10 | 03:50 PM
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Any reason you would go with the 99 spec turbos over the stage 3 bnrs? I was reading that the bnrs have stronger impellers and can be rebuild and just sound like they are higher quality, plus I can get them for less $$, thanks for your input.
Old 05-12-10 | 04:19 PM
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I dont see why anyone would get 99 spec when you could get bnr's regardless of your purpose...either way the bnr's are better even if your not going to use their benefits.
Old 05-12-10 | 04:28 PM
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Like Mahjik said, the BNRs will not require any additional modifications to install and run properly.

The perk to BNRs, in my opinion, is that they run great at stock power with a stock setup, but they can also be cranked up to deliver power in the single turbo range if you so desire.

Where abouts in Waldorf are you? I just moved into the area...
Old 05-12-10 | 04:29 PM
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Originally Posted by FearNoPiston
I dont see why anyone would get 99 spec when you could get bnr's regardless of your purpose...either way the bnr's are better even if your not going to use their benefits.
And the BNRs are rebuildable, whereas the stockers are not.
Old 05-12-10 | 04:40 PM
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If you go with BNRs you will need similar upgrades to single turbo, including ECU (Power FC most likely), larger injectors, fuel pump, big IC, pressure regulator, etc...plus then you have to get it tuned. It might be a little cheaper, but not much. I upgraded all my IC piping and BOV as well when I went to BNRs. The only "stock" item is a heavily modded y-pipe (now flanged).

I should caveat this by saying I'm assuming you want to run more boost. At stock boost levels, the BNRs have no advantage over 99s, plus there is more lag

Last edited by no_more_rice; 05-12-10 at 04:45 PM.
Old 05-12-10 | 04:41 PM
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Originally Posted by FearNoPiston
I dont see why anyone would get 99 spec when you could get bnr's regardless of your purpose....
99 spec is true "plug and play"....you can even retain the stock ECU or a Pettit ECU
Old 05-12-10 | 05:33 PM
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Originally Posted by FearNoPiston
I dont see why anyone would get 99 spec when you could get bnr's regardless of your purpose...either way the bnr's are better even if your not going to use their benefits.
+1, unless you get 99 spec turbos for really cheap, they are not worth the money. But in reality for the cost of BNR twins, you can save up a little more and just go single while improving your overall reliability. So stock twins or single imo unless you want more power and still need to pass inspections.

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Old 05-12-10 | 05:33 PM
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Originally Posted by fendamonky
Like Mahjik said, the BNRs will not require any additional modifications to install and run properly.

The perk to BNRs, in my opinion, is that they run great at stock power with a stock setup, but they can also be cranked up to deliver power in the single turbo range if you so desire.

Where abouts in Waldorf are you? I just moved into the area...
I live in Carrington, my car right now is pretty much completely stock other then a downpipe, and a RB cat-back exhaust system.
Old 05-12-10 | 05:41 PM
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if you plan to stick with near stock boost levels, just get the 99s, they are responsive and boost quick....if you want to go > 12-14 psi get the BNRs

If youre on a tight budget, the answer is simple: 99s. You cannot just bolt on BNRs and run 15-17 psi.
Old 05-12-10 | 05:45 PM
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Originally Posted by no_more_rice
if you plan to stick with near stock boost levels, just get the 99s, they are responsive and boost quick....if you want to go > 12-14 psi get the BNRs

If youre on a tight budget, the answer is simple: 99s. You cannot just bolt on BNRs and run 15-17 psi.
You can't just bolt on stock or 99 twins and run 12-14 psi either. It's the same situation. 99's are a waste of money since people always want more for them even used. They have no benefit at all as they have no advantage except for the fact they cost more.

Originally Posted by no_more_rice
If you go with BNRs you will need similar upgrades to single turbo, including ECU (Power FC most likely), larger injectors, fuel pump, big IC, pressure regulator, etc...plus then you have to get it tuned. It might be a little cheaper, but not much. I upgraded all my IC piping and BOV as well when I went to BNRs. The only "stock" item is a heavily modded y-pipe (now flanged).

I should caveat this by saying I'm assuming you want to run more boost. At stock boost levels, the BNRs have no advantage over 99s, plus there is more lag
There is no noticeable difference in lag between stock and BNR's either.

thewird
Old 05-12-10 | 05:48 PM
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Originally Posted by thewird
You can't just bolt on stock or 99 twins and run 12-14 psi either.
Read what I posted again, I clearly said "near stock" with reference to the 99s (i.e. about 10 psi)

There is no noticeable difference in lag between stock and BNR's either.
At 10 psi? Bigger compressor wheels.
Old 05-12-10 | 05:52 PM
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The compressors may be bigger but there is no noticeable difference between the 2. I've driven both on my car and on other peoples cars. Unless someone tells you, you can't feel the difference response wise.

thewird
Old 05-12-10 | 06:30 PM
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Dear lord there is mixed info in here. Do not waste money on the 99s. I would take the stock 93s anyday for the price difference. Plus good stock twins can be had for about $250.00 these days and most want near a grand for used 99s. If you are determined to drop $1k+ get the BNRs hands down.
Old 05-12-10 | 06:33 PM
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That's exactly what I was thinking. All this talk about getting 99's, like what the hell.

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Old 05-12-10 | 06:37 PM
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I didn't notice any lag with the BNR's compared to stock turbos.
Old 05-12-10 | 06:42 PM
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I can't remember what the stock ones did but when I'm in 5th gear and around 3k, I get 14-15psi in 300RPM. That's pretty fast to me.
Old 05-12-10 | 06:55 PM
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OP, if you want I can give you my old stock twins once I get a place and my household goods arrive.. i'd have to check on their condition, but I don't remember them having any leaks or shaft play.

I've got my FD parked on Indian Head atm if you ever wanna get together to chill/drive on the local backroads.
Old 05-12-10 | 07:04 PM
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First of all, the older 93-95 twins have larger compressor wheels. There is hardly any difference just "bolting on" a set of '99's because on the newer rx7's there are other upgraded components which contribute to the increased hp rating not just the turbos (such as upgraded ic, ecu, exhaust). Now that being, said why would you pay $2600 for some new 99 spec turbos when I can sell you a brand new set of 93-95 twins for near $1000 less. Brand New in box. PM me if ur interested. Don't bother running through used turbos, more often then not they're on their way out and you wasting time and money. Do it right, once, the first time.


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