Mazda Rotary Club

General => General Technical => Topic started by: ftorex on October 22, 2007, 06:30:41 PM

Title: BNR twins..
Post by: ftorex on October 22, 2007, 06:30:41 PM
Hey all..

Thinking of going down the uprated twins route..Just like to know how many of you have BNR twins and if so what kind of power are you making..

cheers..:3gears-lh
Title: BNR twins..
Post by: ftorex on October 23, 2007, 08:52:07 AM
Anybody running BNR\'s in the UK...??  :confused:
Title: BNR twins..
Post by: nikp on October 23, 2007, 09:04:07 AM
Think Rixio might be
Title: BNR twins..
Post by: M@r]{ on October 23, 2007, 09:05:00 AM
There are a few with uprated twins, not sure if they are BNR\'s though.  Rixio has them fitted as does John Hudson (I think)
Title: BNR twins..
Post by: strange_days_uk on October 23, 2007, 09:06:10 AM
Dude, go single, much much more fun and simpler prob more reliable under the hood !

Plus BNR\'s are very pricey !
Title: BNR twins..
Post by: John_Hudson on October 23, 2007, 09:35:59 AM
im using knight sports rf420\'s don\'t really know about the BNR\'s im afraid
Title: BNR twins..
Post by: John_Hudson on October 23, 2007, 09:55:36 AM
here you go

1993 R1 Rx-7 Dyno BNR Stage 3 Turbos Streetported 13B 421 rwhp @17.5 psi

Title: BNR twins..
Post by: John Yorke on October 23, 2007, 04:10:32 PM
Dont you just love US dynos:rollin 1.15bar and 420+bhp your having laugh If you ever see a 400+ FD on a dyno you will know about it.
Title: BNR twins..
Post by: John_Hudson on October 23, 2007, 04:13:06 PM
why not, i think its perfectly believible considering i made 370 whp at .9 on stock ports
Title: BNR twins..
Post by: strange_days_uk on October 23, 2007, 04:20:39 PM
Set of knightsports ones here

http://page2.auctions.yahoo.co.jp/jp/auction/b82923341

Not sure on condition though
Title: BNR twins..
Post by: interloper393 on October 23, 2007, 04:44:33 PM
Quote from: strange_days_ukSet of knightsports ones here

http://page2.auctions.yahoo.co.jp/jp/auction/b82923341

Not sure on condition though


Dam u! why u telling everyone :spank :spank :spank

i need more money lol
Title: BNR twins..
Post by: John_Hudson on October 23, 2007, 04:45:20 PM
cccrreeedit card !!!! :D
Title: BNR twins..
Post by: strange_days_uk on October 23, 2007, 04:49:43 PM
Quote from: interloper393Dam u! why u telling everyone :spank :spank :spank

i need more money lol

Dude, only 1 crescent member can bid on any one auction, so get in an early bid if you want them, then no-one else from here can get at them...
Title: BNR twins..
Post by: John_Hudson on October 23, 2007, 04:52:09 PM
thats not true, interloper himself raised my bid when i was going for my night sports twins and cost me an extra 200 quid.... :Grrr
Title: BNR twins..
Post by: marco on October 23, 2007, 04:53:17 PM
From the English translation I got the impression that they are knackered? or did I get the wrong end of the stick?

obviously I am not the only one toying with the idea of uprated twins then!:rollin :rollin :rollin
Title: BNR twins..
Post by: strange_days_uk on October 23, 2007, 04:54:32 PM
Quote from: John_Hudsonthats not true, interloper himself raised my bid when i was going for my night sports twins and cost me an extra 200 quid.... :Grrr

thats a dirty trick !"!
Title: BNR twins..
Post by: John_Hudson on October 23, 2007, 04:55:36 PM
what a git :p
Title: BNR twins..
Post by: interloper393 on October 23, 2007, 05:06:10 PM
ehh? lol thats shocking! i dont buy through cresent so im ok :P
Title: BNR twins..
Post by: John_Hudson on October 23, 2007, 05:09:12 PM
well you still cost me 200 and your still a git :D
Title: BNR twins..
Post by: John Yorke on October 23, 2007, 05:35:57 PM
Quote from: John_Hudsonwhy not, i think its perfectly believible considering i made 370 whp at .9 on stock ports

I would love to see the dyno printout
Title: BNR twins..
Post by: John_Hudson on October 23, 2007, 06:43:39 PM
my dyno print out?

(http://i36.photobucket.com/albums/e12/asthier/dyno1.jpg)

(http://i36.photobucket.com/albums/e12/asthier/dyno2.jpg)
Title: BNR twins..
Post by: John Yorke on October 23, 2007, 09:05:24 PM
379 HUBS make that about 350 WHP very nice, very late on boost though, think you would have seen a better power band on seq. each to their own. Be interesting on longevity.
Title: BNR twins..
Post by: John_Hudson on October 23, 2007, 09:12:53 PM
ok so i was wrong :p still 357.8xxxx rwhp but on a ported block i recon that could be alot more.  oh and my twins are non seq
Title: BNR twins..
Post by: davyv on October 23, 2007, 09:28:09 PM
What about the high flow Turbo Technics twins pip does,are they anygood.
Title: BNR twins..
Post by: John_Hudson on October 23, 2007, 09:43:13 PM
im told they are pretty good
Title: BNR twins..
Post by: John Yorke on October 24, 2007, 09:58:18 PM
Quote from: John_Hudsonok so i was wrong :p still 357.8xxxx rwhp but on a ported block i recon that could be alot more.  oh and my twins are non seq
Dont think you read my post, I indicated you were running non seq, hense the late spool, to be honest for that power you would see a better return with a TO4E and it would spool quicker and give you a bigger power band.
Title: BNR twins..
Post by: John_Hudson on October 24, 2007, 10:01:33 PM
my car is fine and im happy with it as is, she runs 12\'s with incorrectly set up suspension 30 profile tyres and easy launches.  And considering ive only ever dragged 5 runs in my life, i dont think im doing too bad, all i can say is bring on the street port and ramp up the boost
Title: BNR twins..
Post by: Rixio on October 26, 2007, 12:59:42 PM
BNR\'s are the way forward if you want to stay as stock as possible but with more power and delivery :)

Im running at 1.15bar in seq and i think the drivabilty around town is fantastic compared to a single tub. Out on open roads its great & i actually preffer driving it to my TD06 :D

Drop me an email if you do want to go for it because i\'l be doing a GB on them in about a month...lightningdyn@msn.com
Title: BNR twins..
Post by: John Yorke on October 26, 2007, 05:27:33 PM
Quote from: John_Hudsonmy car is fine and im happy with it as is, she runs 12\'s with incorrectly set up suspension 30 profile tyres and easy launches.  And considering ive only ever dragged 5 runs in my life, i dont think im doing too bad, all i can say is bring on the street port and ramp up the boost

Go for it Im glad your happy with it, wasnt aware it was about dragging, any way best of luck hope you make it into the 11\'s or below:Thumbsup!
Title: BNR twins..
Post by: ftorex on October 31, 2007, 01:48:45 PM
Cheers all, I want to try and keep it twin turbo and the BNR\'s have had some good results in the states..
A new project for the winter along with an engine rebuild and plenty of other goodies..:D
Also want to keep it sequential and i think with some porting etc. I should see good HP figures..:3gears-rh