Visual difference BNR st.3 "1.st gen vs 2.nd gen" ?
04-04-12, 07:15 AM
#1
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Visual difference BNR st.3 "1.st gen vs 2.nd gen" ?
Hi!
I see there is some talk about "1.st gen BNR St.3s" vs "2nd.gen", and that the last one performs better than the first version... I also see that CYM FD perform 430whp in seq.mode, with the second generation BNR set. Is there some way of visually determine if my set is first or second gen without calling Bryan? Dont want to bother him if i can figure it out for myself, as i know he is so busy
cheers
I see there is some talk about "1.st gen BNR St.3s" vs "2nd.gen", and that the last one performs better than the first version... I also see that CYM FD perform 430whp in seq.mode, with the second generation BNR set. Is there some way of visually determine if my set is first or second gen without calling Bryan? Dont want to bother him if i can figure it out for myself, as i know he is so busy
cheers
04-04-12, 08:37 AM
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04-04-12, 09:51 AM
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this one, Yellow R1 is his username, brother of RX7_TT:
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/bnr-stage-3-turbos-966671/page2/
There is a minor production change in the BNR stage 3s somewhere along the line, Bryan@BNR confirmed it himself, slight change in the compressor wheel to flow/push a few lbs more.
So, i have a set of BNRs on the shelf here, soon to go in the car, and i wondered if i had the pre or post-modification BNR set
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04-04-12, 02:28 PM
#8
Also the first gens composer wheel has 11 (?) single blades...
Where as the second gens look like the factory with 5 sets of twin blades... If I'm not mistaken, (never personally held/seen a set of 2nd gens, so I'm not 100% on that)
I do however, have a picture comparing stock HT-12's to my first gen BNR's... It's on my computer at home i can post it up later if people want..
J.
Where as the second gens look like the factory with 5 sets of twin blades... If I'm not mistaken, (never personally held/seen a set of 2nd gens, so I'm not 100% on that)
I do however, have a picture comparing stock HT-12's to my first gen BNR's... It's on my computer at home i can post it up later if people want..
J.
04-04-12, 05:07 PM
#9
Sounds like 2nd gen to me!
I tried to contact Bryan a while ago about this and he told me that both 1st gen and 2nd gen should have no problem getting over 400 (seq). I never got a confirmation from him on what gen I have tho. I sent pics as well.
Pat
04-04-12, 05:39 PM
#10
Im not sure this is correct. Im pretty sure the BNR stage 3s for years have required the extended y-pipe. While just 3-4 months ago Bryan mentioned some recent changes to the BNR stage 3s that he thought would produce more power.
Unfortunately I dont know what the change was. Im sure Bryan will chime in.
Unfortunately I dont know what the change was. Im sure Bryan will chime in.
04-04-12, 06:34 PM
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Hey all.
Yes I did change the compressor wheel to a customized compressor that I produced for the mazdaspeed 3's and 6's. Its a drop in deal and gets around 4 lbs/min more volume over the standard 2860 so 39 lb/min vs 35 lb/min. The new compressor is also higher pressure ratio. The wheel has a lot of the same charactoristics of a billet wheel but in a cast version. They have smaller hubs with longer blade area. When you have longer blades, you have more volume of flow in most cases.
Bryan@BNR
205 640 1193
Yes I did change the compressor wheel to a customized compressor that I produced for the mazdaspeed 3's and 6's. Its a drop in deal and gets around 4 lbs/min more volume over the standard 2860 so 39 lb/min vs 35 lb/min. The new compressor is also higher pressure ratio. The wheel has a lot of the same charactoristics of a billet wheel but in a cast version. They have smaller hubs with longer blade area. When you have longer blades, you have more volume of flow in most cases.
Bryan@BNR
205 640 1193
04-05-12, 08:05 AM
#16
You didn't read very closely, never once did I state the original version of the BNR stage 3s required an extended y-pipe. I simply stated that for the last several years they have required an extended y-pipe and that extended y-pipe does not guarantee you have the latest version. With the exception of the most recent changes I think I've owned about every variation of BNRs available for the Fd over the years.
04-06-12, 09:55 PM
#17
You didn't read very closely, never once did I state the original version of the BNR stage 3s required an extended y-pipe. I simply stated that for the last several years they have required an extended y-pipe and that extended y-pipe does not guarantee you have the latest version. With the exception of the most recent changes I think I've owned about every variation of BNRs available for the Fd over the years.
My mistake, I was referring to the differences between generations as the lack of the extended y pipe.
Where as you were judging them based on whether they had the new composer wheel or not..
in all technicalities there should be 3 generations of BNR's...
what is the difference between the extended y pipe ones and the non extended, do they use use different CHRA's then the non extended ones...?
J.
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