The newest 100% bolt on Greddy Hybrid turbocharger!
#826
Turbocharger Guru
Thread Starter
Hey Paul.
The compressor and turbine maps are made w/o housings statically. Everything surrounding the compressor/turbine are variables that can be changed.
The compressor and turbine maps are made w/o housings statically. Everything surrounding the compressor/turbine are variables that can be changed.
#829
Turbocharger Guru
Thread Starter
Which housing was the T4 comrpessor wheels put in?
T04B .50 a/r
T04B .60 a/r
T04B .70 a/r
T04B .85 a/r
T04E .50 a/r
T04E .60 a/r
T04E .70 a/r
T04S .55 a/r
T04S .70 a/r
T04S04 .55 a/r
Would a housing change be a "Variable"? I know when I change up a compressor housing, it makes a noticable change in delivery.
Last edited by Bryan@BNR; 06-03-2010 at 11:02 PM.
#830
Banned
iTrader: (3)
They have maps for all of the of the modern housings.
For the "old fashioned" stuff, you have to dig around a bit, but they are out there.
A compressor wheel can't have a flow map without a housing. Otherwise, it would just be a fan!
I'm not totally sure what you are talking about here.
There is only "dynamic" pressure in a turbo system. If the pressure goes "static", the compressor will stall. Do you mean stall pressure and surge?
For the "old fashioned" stuff, you have to dig around a bit, but they are out there.
A compressor wheel can't have a flow map without a housing. Otherwise, it would just be a fan!
There is only "dynamic" pressure in a turbo system. If the pressure goes "static", the compressor will stall. Do you mean stall pressure and surge?
Last edited by MazdaManiac; 06-04-2010 at 12:06 AM.
#832
Banned
iTrader: (3)
OMG. Really? Are you just refusing to check up on this stuff?
What is a restriction? What is pressure? What is flow? Where do they go when they intersect?
What is a volute? What is a diffuser? How do they work?
The only person that is deluded here is you and I've about had it with your f-ed up, stupid ****. Seriously.
Go away, read up and come back. This place has enough sheep and we don't really need any more retarded wolves.
What is a restriction? What is pressure? What is flow? Where do they go when they intersect?
What is a volute? What is a diffuser? How do they work?
The only person that is deluded here is you and I've about had it with your f-ed up, stupid ****. Seriously.
Go away, read up and come back. This place has enough sheep and we don't really need any more retarded wolves.
#833
with a less degree of a bend the air would flow easier wouldn't it? He's not saying it's a lower amount of air from passing through(i think), but the turbo does have to work harder to push the air through that bend versus something with a straighter design....
#834
Banned
iTrader: (3)
Turbos don't "work harder".
THEY ACCELERATE AIR MOLECULES. That's it.
The ability of the VOLUTE to convert that velocity into pressure is mitigated by the adiabatic efficiency of the compressor assembly (wheel and housing). It doesn't care how "hard" it is to do that. The conversion has to occur somewhere - it doesn't really matter if it is at the discharge or the throttle.
THEY ACCELERATE AIR MOLECULES. That's it.
The ability of the VOLUTE to convert that velocity into pressure is mitigated by the adiabatic efficiency of the compressor assembly (wheel and housing). It doesn't care how "hard" it is to do that. The conversion has to occur somewhere - it doesn't really matter if it is at the discharge or the throttle.
#835
so then having that bend means nothing? NOTHING at all? I find that hard to believe, but I'm not the as knowledgeable with this stuff. I'm still learning
#836
Boosted Kiwi
iTrader: (2)
OMG. Really? Are you just refusing to check up on this stuff?
What is a restriction? What is pressure? What is flow? Where do they go when they intersect?
What is a volute? What is a diffuser? How do they work?
The only person that is deluded here is you and I've about had it with your f-ed up, stupid ****. Seriously.
Go away, read up and come back. This place has enough sheep and we don't really need any more retarded wolves.
What is a restriction? What is pressure? What is flow? Where do they go when they intersect?
What is a volute? What is a diffuser? How do they work?
The only person that is deluded here is you and I've about had it with your f-ed up, stupid ****. Seriously.
Go away, read up and come back. This place has enough sheep and we don't really need any more retarded wolves.
I'm just going to call Bullshit on this suggestion of yours that putting a 90deg bend on the turbo outlet (as per the Greddy setup) is good design and let you decide whether you want to find the relevant info to prove that you are correct or not .
Maybe it isn't that big of a deal as far as inhibiting the turbos output - I don't really know . But I'm damed sure that , if you were designing the kit for high hp from scratch , you would at the very least put a much larger radius bend in there .
#837
Is it possible that the clipped turbine in the BNR upgrade is limiting the maximum amount of boost achievable? (This isn't in connection with the above discussion..)
I guess the amount of power hasn't been ultimately decided as boost pressures that people have been running have been near 9psi on the BNR upgrade, when it looks like 14-15 is what it needs to make the power being claimed.
I don't know how much of the turbine is clipped but it doesn't seem like boost control is a huge issue if the maximum we're going to see is nearly the amount that we want. As long as the spring is correct and a decent boost controller plumbed up, I don't see boost creep being an issue. After enlarging the wheel it seems you'd want all the turbine you can get, because at least the way I see it, the 'face value' difference in size (in mm) between the turbine and the compressor, will give you a very rough estimate on capable power and spool.
I'm really really hoping the BNR upgrade is a good one. No doubt on the care and obvious benefits of the water cooled CHRA, but hopefully power wise as well.
I guess the amount of power hasn't been ultimately decided as boost pressures that people have been running have been near 9psi on the BNR upgrade, when it looks like 14-15 is what it needs to make the power being claimed.
I don't know how much of the turbine is clipped but it doesn't seem like boost control is a huge issue if the maximum we're going to see is nearly the amount that we want. As long as the spring is correct and a decent boost controller plumbed up, I don't see boost creep being an issue. After enlarging the wheel it seems you'd want all the turbine you can get, because at least the way I see it, the 'face value' difference in size (in mm) between the turbine and the compressor, will give you a very rough estimate on capable power and spool.
I'm really really hoping the BNR upgrade is a good one. No doubt on the care and obvious benefits of the water cooled CHRA, but hopefully power wise as well.
Last edited by Frosty288; 06-07-2010 at 01:55 PM.
#839
Turbocharger Guru
Thread Starter
The restriction isn't the turbine wheel or the clip. I have customers making 500 to 4 wheels with that turbine wheel. Should be enough turbine for 375-400 rotary WHP if the exhaust housing is efficient enough to flow the volume.
#841
Tailgaters beware
Is there a dyno for the BNR upgrade? I looked through the Highest Horsepower Dyno's thread and didn't see it.
I live only about 2 1/2 hours from RX7 Store so this is one of my more stand out options, but I would like to get some more detail about it.
I read that entire thread where in the end the shop was saying the Greddy intercooler was a restriction on the flow, and it just ended with that.
I live only about 2 1/2 hours from RX7 Store so this is one of my more stand out options, but I would like to get some more detail about it.
I read that entire thread where in the end the shop was saying the Greddy intercooler was a restriction on the flow, and it just ended with that.
#842
Boosted Kiwi
iTrader: (2)
Is there a dyno for the BNR upgrade? I looked through the Highest Horsepower Dyno's thread and didn't see it.
I live only about 2 1/2 hours from RX7 Store so this is one of my more stand out options, but I would like to get some more detail about it.
I read that entire thread where in the end the shop was saying the Greddy intercooler was a restriction on the flow, and it just ended with that.
I live only about 2 1/2 hours from RX7 Store so this is one of my more stand out options, but I would like to get some more detail about it.
I read that entire thread where in the end the shop was saying the Greddy intercooler was a restriction on the flow, and it just ended with that.
I would be more inclined to go for the 50trim upgrade from what I've seen here .
#843
It's sooo quiet in here. I need a GReddy upgrade now and still haven't decided which road to go - the easy one, but not proven yet(BNR), or the hard one, but proven (MM-like).
I'm not convinced the problem is the GReddy IC. As far as I know non of the 3071R guys have IC flow problems.
Am I wrong...?
I'm not convinced the problem is the GReddy IC. As far as I know non of the 3071R guys have IC flow problems.
Am I wrong...?
#844
SPOOLN8
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^ I believe your right people havent complained about the IC with the GT3071R but that turbo flows a hell of alot more air than the GReddy and I don't think alot of different IC's have been tried out, problem with bigger IC's is that you don't want to block more airlfow to the Rad than you have to
#845
The question for me is what's the problem with the BNR upgrade that it can't do the job as advertised? Or it's just a lack of user reports.
I don't care for dyno numbers, just want to convince myself it flows as it has to.
Reading this thread two times, both times I was so excited and... the last few pages got me thinking something's not right. Is it the design or what? Looks good on paper (and talking) but still nobody got it to work properly.
I don't care for dyno numbers, just want to convince myself it flows as it has to.
Reading this thread two times, both times I was so excited and... the last few pages got me thinking something's not right. Is it the design or what? Looks good on paper (and talking) but still nobody got it to work properly.
Last edited by SC-ed; 08-08-2010 at 07:00 PM.
#846
Banned
iTrader: (3)
^ I believe your right people havent complained about the IC with the GT3071R but that turbo flows a hell of alot more air than the GReddy and I don't think alot of different IC's have been tried out, problem with bigger IC's is that you don't want to block more airlfow to the Rad than you have to
![](https://www.rx8club.com/attachments/series-i-major-horsepower-upgrades-93/160574d1281361128-newest-100%25-bolt-greddy-hybrid-turbocharger-26070_420812035585_738225585_5826621_6422360_n.jpg)
#847
1% evil, 99% hot gas.
iTrader: (21)
^ Guess that's a "7" mount. :-)
Now show us the big hole you hogged in your hood...
And find me that driver's side hard pipe, please!
Now show us the big hole you hogged in your hood...
And find me that driver's side hard pipe, please!
#848
Banned
iTrader: (3)
![](https://www.rx8club.com/attachments/series-i-major-horsepower-upgrades-93/160575d1281363794-newest-100%25-bolt-greddy-hybrid-turbocharger-13443_443009555585_738225585_6419569_480186_n.jpg)
![](https://www.rx8club.com/attachments/series-i-major-horsepower-upgrades-93/160576d1281363794-newest-100%25-bolt-greddy-hybrid-turbocharger-34134_446209875585_738225585_6504884_4818617_n.jpg)
One could simply use the Seibon vented hood to the same effect.
Here is a better pic of the IC:
![](https://www.rx8club.com/attachments/series-i-major-horsepower-upgrades-93/160577d1281363794-newest-100%25-bolt-greddy-hybrid-turbocharger-38651_146128865398640_100000045810764_442062_6068942_n.jpg)
And find me that driver's side hard pipe, please!
I'm still looking, but I have over 500 pounds of aluminum pipe I've been sorting through over here as I organize the operation.
#849
SPOOLN8
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^ Yeah Jeff I've seen your IC mount before but I also know you have undisclosed engine specs. What I meant was that not alot of people have tried many different intercoolers... it is most common to see the GReddy FMIC..... I guess you have zero problems with IC blocking airflow to your rad though lol