BNR turbo dyno sheets please.
F**K THE SYSTEM!!
Joined: Sep 2006
Posts: 2,591
Likes: 1
From: Florida
16g's dont have a bigger exhaust housing but they are known for 20+psi
Plus i have an s4 motor with s5 turbo/mani. <-- WOuld thhat help with a couple of extra psi atleast?( less compression less back press = lil more psi?)
Plus i have an s4 motor with s5 turbo/mani. <-- WOuld thhat help with a couple of extra psi atleast?( less compression less back press = lil more psi?)
Joined: Feb 2006
Posts: 2,897
Likes: 2
From: Renton/Bellevue/Seattle WA
I would not think that lower compression would help push higher boost.
I think you somewhat have the whole turbo idea confused. You CAN make a stock turbo push 20 psi, I know a ....person here in yakima, that did it once. (he is crazy) the thing is at that point the turbo is (not slowly) destroying itself, AND is blowing some serious HOT air into your engine. You pretty much never want to take a turbo past its efficiency range. (Yes I know you are talking hybrid, and the turbo will be balanced extremely well, but .... why not just stick with the 18 psi recommended? You will make more power at 15 psi with cooler air than 22 and your intake glowing red! :P )
If you want to do 20 psi ...and for some reason your stuck on it (just for bragging rights??), I would NOT recommend a hybrid. What are your goals? You want 410 rwhp on the stage 4 for a specific reason?
(also the 16Gs might have a more sophisticated wastegate setup alowing it to hold such high boost (although useless in my mind)?)
Again if your stuck on 20+ psi, install a stronger spring or weld shut your stock turbos wastegate... will save you money in the long run not having to buy and blow up a hybrid.
I think you somewhat have the whole turbo idea confused. You CAN make a stock turbo push 20 psi, I know a ....person here in yakima, that did it once. (he is crazy) the thing is at that point the turbo is (not slowly) destroying itself, AND is blowing some serious HOT air into your engine. You pretty much never want to take a turbo past its efficiency range. (Yes I know you are talking hybrid, and the turbo will be balanced extremely well, but .... why not just stick with the 18 psi recommended? You will make more power at 15 psi with cooler air than 22 and your intake glowing red! :P )
If you want to do 20 psi ...and for some reason your stuck on it (just for bragging rights??), I would NOT recommend a hybrid. What are your goals? You want 410 rwhp on the stage 4 for a specific reason?
(also the 16Gs might have a more sophisticated wastegate setup alowing it to hold such high boost (although useless in my mind)?)
Again if your stuck on 20+ psi, install a stronger spring or weld shut your stock turbos wastegate... will save you money in the long run not having to buy and blow up a hybrid.
Last edited by TweakGames; Mar 17, 2008 at 04:21 PM.
You are talking about smaller turbos on piston engines...
Piston engines have much less overlap so the exhaust dillution and intake heating from high backpressure from running high boost or a small turbo (or both) is MUCH less than a high overlap rotary.
This is why we must use huge exhaust housings and do not make much gains as we increase boost pressure (compared to a piston engine...)
The Renissis with no overlap is probably the answer for high boost or small turbo or both. Just need lots of octane for the high compression ratio or new low compression rotors made for it.
Piston engines have much less overlap so the exhaust dillution and intake heating from high backpressure from running high boost or a small turbo (or both) is MUCH less than a high overlap rotary.
This is why we must use huge exhaust housings and do not make much gains as we increase boost pressure (compared to a piston engine...)
The Renissis with no overlap is probably the answer for high boost or small turbo or both. Just need lots of octane for the high compression ratio or new low compression rotors made for it.
I didn't think you guys were talking about 16g turbo on a rotary and how they manage to make a lot of power at high boost because I have never seen a 16G on a rotary making any decent power.
I am explaining why turbo rotary engines do not gain much power as the boost is increased ESPECIALLY with a small exhaust side turbo.
overlap
It has very little to do with the compressor efficiency. Yes, you may drop some percentage of efficiency on a 60-1 doubling the boost from 15-30psi. Taking into account that drop in efficiency and why did you still gain so little power going from 15 to 30 psi ...exhaust backpressure and overlap.
Perfect example. GT35R doesn't seem to be making much more power at high boost than the old 60-1 on a rotary despite the compressor section being designed to do just that.
I am explaining why turbo rotary engines do not gain much power as the boost is increased ESPECIALLY with a small exhaust side turbo.
overlap
It has very little to do with the compressor efficiency. Yes, you may drop some percentage of efficiency on a 60-1 doubling the boost from 15-30psi. Taking into account that drop in efficiency and why did you still gain so little power going from 15 to 30 psi ...exhaust backpressure and overlap.
Perfect example. GT35R doesn't seem to be making much more power at high boost than the old 60-1 on a rotary despite the compressor section being designed to do just that.
Got in my S5 stg 4... it will be about a month or two before it goes in but im excited its here.
I ran outta money so its going to be stockport for now but here are the go fast mods:
Walbro 255
758 primaries, 1600 secondaires
Haltech e6k
PWR 6x10 water/air barrel type intercooler
pics:
I ran outta money so its going to be stockport for now but here are the go fast mods:
Walbro 255
758 primaries, 1600 secondaires
Haltech e6k
PWR 6x10 water/air barrel type intercooler
pics:
Yea i just talked to Bryan today. He said he would get mine shipped next wed. Looks great cant wait to get mine back. It will be close but i think that i can get it done in time. I have to leave April 4th to go get mine tuned in St. Louis. Looks awesome cant wait.
whoo!!
got my turbo yesterday, got it in last night, and drove the car today.
not nearly as powerfull right off the bat, but thats probably because i dont have a boost controller.
was running at about 16-18 psi on the stock turbo, now the BNR stage 2 is topping at about 4-5 psi. so, basically i need a boost controller to turn up the boost.
the turbo was super clean, and looks amazing.
cant wait to get an MBC and crank up the boost, then ill get some dyno charts for you guys.
got my turbo yesterday, got it in last night, and drove the car today.
not nearly as powerfull right off the bat, but thats probably because i dont have a boost controller.
was running at about 16-18 psi on the stock turbo, now the BNR stage 2 is topping at about 4-5 psi. so, basically i need a boost controller to turn up the boost.
the turbo was super clean, and looks amazing.
cant wait to get an MBC and crank up the boost, then ill get some dyno charts for you guys.
Joined: Feb 2006
Posts: 2,897
Likes: 2
From: Renton/Bellevue/Seattle WA
whoo!!
got my turbo yesterday, got it in last night, and drove the car today.
not nearly as powerfull right off the bat, but thats probably because i dont have a boost controller.
was running at about 16-18 psi on the stock turbo, now the BNR stage 2 is topping at about 4-5 psi. so, basically i need a boost controller to turn up the boost.
the turbo was super clean, and looks amazing.
cant wait to get an MBC and crank up the boost, then ill get some dyno charts for you guys.
got my turbo yesterday, got it in last night, and drove the car today.
not nearly as powerfull right off the bat, but thats probably because i dont have a boost controller.
was running at about 16-18 psi on the stock turbo, now the BNR stage 2 is topping at about 4-5 psi. so, basically i need a boost controller to turn up the boost.
the turbo was super clean, and looks amazing.
cant wait to get an MBC and crank up the boost, then ill get some dyno charts for you guys.
it was one of those deals where i had the spare parts, and the stock turbo was just overboosting/creeping like an animal.
i plan on running between 10-12 psi on the stage 2, and i know that i have more than enough fuel to support it (was running 10 and 11 afr's on the stock turbo at around 20 psi, and the fuel system was not even pushed that hard)
so, once i get a boost controller, i can turn it up a bit, and see what she does.
I havent had one on either and no problems. I put down 322rwhp and 285lb ft on 9lbs. We couldnt get it to hold boost, the wastegate kept blowing open. It is a blast to drive though. Now i just keep blowing vacuum lines off under the intake. I zip tied all the oil injector lines last night and for some reason today it sounds like another vacuum leak. This is getting old chasing these down.
I havent had one on either and no problems. I put down 322rwhp and 285lb ft on 9lbs. We couldnt get it to hold boost, the wastegate kept blowing open. It is a blast to drive though. Now i just keep blowing vacuum lines off under the intake. I zip tied all the oil injector lines last night and for some reason today it sounds like another vacuum leak. This is getting old chasing these down.
Those are nice numbers at 9psi. On another note would you care to share your numbers for the profec b spec 2? Please PM me to keep this thread on topic.
Thanks guys!
Joined: Aug 2005
Posts: 246
Likes: 0
From: Birmingham, AL
Is it just me .... or are the numbers on the BNRturbos website for rwhp somewhat exaggerated? Maybe if the engine was built, ported, and tuned perfectly peoples numbers would match those on the site?
Stage 4s putting out 353 rwhp
Stage 3s barely putting out 307...
Is it just that people aren't doing their tuning and such right, or at the numbers they should reach maybe rounded up a little high?
Not calling anyone out here what so ever, just wondering why no one is reaching or even getting close to what they have been known to do... (power wise)
Maybe the 2 or 3 more psi, and not having the coolant leak will help jump the hp up by 50 on his stage 3?
(again I am not saying that anything is wrong with the turbos, I am just doing research. I was REALLY interested in getting a stage 2, and putting down 300 rwhp, but it looks like that's almost impossible with a stage 2, seeing how stage 3s are barely doing it..)
Stage 4s putting out 353 rwhp
Stage 3s barely putting out 307...
Is it just that people aren't doing their tuning and such right, or at the numbers they should reach maybe rounded up a little high?
Not calling anyone out here what so ever, just wondering why no one is reaching or even getting close to what they have been known to do... (power wise)
Maybe the 2 or 3 more psi, and not having the coolant leak will help jump the hp up by 50 on his stage 3?
(again I am not saying that anything is wrong with the turbos, I am just doing research. I was REALLY interested in getting a stage 2, and putting down 300 rwhp, but it looks like that's almost impossible with a stage 2, seeing how stage 3s are barely doing it..)
I have a 62-1 single on my FB RX7 and it dynoed 366 at 13 psi of boost. So that dyno sheet of 353 is great for 13 psi. You must consider how short the manifold is and that the turbo is internally wastegated. Bolt up is the most simple, cost effective way to improve on power. I am not saying its the best way to make 400 RWHP plus. Not everyone is interested in external gates and full T4's. They just want to run well and beat up on some mustangs!
I have a stage 2 hybrid on my T2 and absolutely love it. It has great spool and a good punch. I am running 14-15 psi and it runs flawless.... I will try and get to the dyno sometime in the near future.
Bryan@BNR
205 640 1193
o **** brian whats up nice of you to drop some info on us. i have your stg 4 and should be up and running any day now the turbo is amazing i had it running for about a year before redoing the whole car
james
james
Joined: Aug 2005
Posts: 246
Likes: 0
From: Birmingham, AL
I havent had one on either and no problems. I put down 322rwhp and 285lb ft on 9lbs. We couldnt get it to hold boost, the wastegate kept blowing open. It is a blast to drive though. Now i just keep blowing vacuum lines off under the intake. I zip tied all the oil injector lines last night and for some reason today it sounds like another vacuum leak. This is getting old chasing these down.
Put an external spring on the actuator. That will get you some more boost. I would look at the pipes for leaks. Check the Throttle body O ring to make sure its good. If it is flat, silicone it.
