dual or single on hybrid turbo?

rotaryxperinemtn7 · 03-09-2008

i might be picking up a hybrid turbo from BNRTURBOS.COM

here is a brief description: "This turbo is good for up to 15-16 psi of boost. This turbocharger comes with the T04B package, modified 60-1 compressor wheel, optional 360 thrust bearing for higher boost applications and the turbine housing is extremely modified to reduce backpressure."

right now i have a m5 noozle but im not sure if that too small, its for a 90 rx7 i might be running 720/1680cc injector combo. this turbo might be good for maybe 300-350rwhp.

dvldoc · 03-09-2008

That M5 will cover a RX7 to around 350hp.

rotaryxperinemtn7 · 03-10-2008

yea i might be close to that, so wouldnt that be maxing it out? should i go with a single m7 just to be on safe side?

dvldoc · 03-10-2008

You might have to pull some fuel if you don't have a progressive kit but that will cover you for sure.

RotaryXperiment7 · 03-10-2008

well i have the progressive kit, havent installed it yet. so go with m7?

dvldoc · 03-10-2008

Yes because you can raise the full set point to lower the flow of the pump and adjust it to a level you want it at.

CamroseFC · 03-17-2008

interesting post for me... I'm running a very similar set up. I'm using a BNR Stage4 turbo- P trim exhaust wheel and 60 trim t04b compressor...
I'm going with the M7 nozzle. They say that the turbo is good for 400rwhp, but I'm on stock ports (13b) so we'll see. I see alot of rotary guys using a bigger nozzle on similar Hp quotes...
Because the turbo's efficiency gets iffy above 16 psi, I think I'm on the right track anyways with the M7...
Any thoughts?

oh... question regarding the solenoid on the install diagram... what one do you recommend and when is it absolutely necessary to run one?

dvldoc · 03-17-2008

The nozzle size calculator is not 100% but it's pretty close on most applications. Things like a turbos efficiency above a certain limit are other factors to consider. Which would explain why you can run a bigger nozzle in many apps with no ill effect.

The solenoid is a option but we put it in the install directions anyways. The kit comes with a check valve so it's only needed if you prefer a solenoid.

CamroseFC · 03-17-2008

thanks dude

RotaryXperiment7 · 03-17-2008

nice, ima try to keep to the 15 psi region cuz its out of its effieceny there (at least on stage 3 which im getting i think 15psi is tops).
i actually was speaking to the guy who does the turbos and says that alcohol is not needed on the turbo since its max effiecent range is 15 psi. so should i just inject water to keep things cool? or a mix?

03-09-2008	#1 (permalink)
rotaryxperinemtn7 Water Injection Newb Year: 1988 Make: Mazda Model: Rx7 TII Join Date: Jul 2007 Posts: 2	dual or single on hybrid turbo? i might be picking up a hybrid turbo from BNRTURBOS.COM here is a brief description: "This turbo is good for up to 15-16 psi of boost. This turbocharger comes with the T04B package, modified 60-1 compressor wheel, optional 360 thrust bearing for higher boost applications and the turbine housing is extremely modified to reduce backpressure." right now i have a m5 noozle but im not sure if that too small, its for a 90 rx7 i might be running 720/1680cc injector combo. this turbo might be good for maybe 300-350rwhp.

03-09-2008	#2 (permalink)
dvldoc DevilsOwn Staff Join Date: Apr 2005 Posts: 1,968	Re: dual or single on hybrid turbo? That M5 will cover a RX7 to around 350hp. __________________ Currently deployed to Ramadi 1 battalion 12th Marines see you in 8 months.

03-10-2008	#3 (permalink)
rotaryxperinemtn7 Water Injection Newb Year: 1988 Make: Mazda Model: Rx7 TII Join Date: Jul 2007 Posts: 2	Re: dual or single on hybrid turbo? yea i might be close to that, so wouldnt that be maxing it out? should i go with a single m7 just to be on safe side?

03-10-2008	#4 (permalink)
dvldoc DevilsOwn Staff Join Date: Apr 2005 Posts: 1,968	Re: dual or single on hybrid turbo? You might have to pull some fuel if you don't have a progressive kit but that will cover you for sure. __________________ Currently deployed to Ramadi 1 battalion 12th Marines see you in 8 months.

03-10-2008	#5 (permalink)
RotaryXperiment7 Alcohol Injection Year: 1990 Make: Mazda Model: Rx7 Turbo II Join Date: Aug 2007 Posts: 43	Re: dual or single on hybrid turbo? well i have the progressive kit, havent installed it yet. so go with m7?

03-10-2008	#6 (permalink)
dvldoc DevilsOwn Staff Join Date: Apr 2005 Posts: 1,968	Re: dual or single on hybrid turbo? Yes because you can raise the full set point to lower the flow of the pump and adjust it to a level you want it at. __________________ Currently deployed to Ramadi 1 battalion 12th Marines see you in 8 months.

03-17-2008	#7 (permalink)
CamroseFC Water Injection Newb Year: 1987 Make: mazda Model: FC rx7 (t04b 60trim) Join Date: Feb 2008 Posts: 12	Re: dual or single on hybrid turbo? interesting post for me... I'm running a very similar set up. I'm using a BNR Stage4 turbo- P trim exhaust wheel and 60 trim t04b compressor... I'm going with the M7 nozzle. They say that the turbo is good for 400rwhp, but I'm on stock ports (13b) so we'll see. I see alot of rotary guys using a bigger nozzle on similar Hp quotes... Because the turbo's efficiency gets iffy above 16 psi, I think I'm on the right track anyways with the M7... Any thoughts? oh... question regarding the solenoid on the install diagram... what one do you recommend and when is it absolutely necessary to run one?

03-17-2008	#8 (permalink)
dvldoc DevilsOwn Staff Join Date: Apr 2005 Posts: 1,968	Re: dual or single on hybrid turbo? The nozzle size calculator is not 100% but it's pretty close on most applications. Things like a turbos efficiency above a certain limit are other factors to consider. Which would explain why you can run a bigger nozzle in many apps with no ill effect. The solenoid is a option but we put it in the install directions anyways. The kit comes with a check valve so it's only needed if you prefer a solenoid. __________________ Currently deployed to Ramadi 1 battalion 12th Marines see you in 8 months.

03-17-2008	#9 (permalink)
CamroseFC Water Injection Newb Year: 1987 Make: mazda Model: FC rx7 (t04b 60trim) Join Date: Feb 2008 Posts: 12	Re: dual or single on hybrid turbo? thanks dude

03-17-2008	#10 (permalink)
RotaryXperiment7 Alcohol Injection Year: 1990 Make: Mazda Model: Rx7 Turbo II Join Date: Aug 2007 Posts: 43	Re: dual or single on hybrid turbo? nice, ima try to keep to the 15 psi region cuz its out of its effieceny there (at least on stage 3 which im getting i think 15psi is tops). i actually was speaking to the guy who does the turbos and says that alcohol is not needed on the turbo since its max effiecent range is 15 psi. so should i just inject water to keep things cool? or a mix?