Time for some boost! VSR Motorsports Single Turbo Kit

YzGyz · 01-23-2015, 12:10 PM

Quote:

Originally Posted by jwick

Not hardly any. My goal was 525whp and 450-475wtqish. I'm at the torque level but not HP. We did a pull at 11.8psi and it hit 518/479 but it leaned out a little up top so we dialed it back a half pound and called it a day (503/465).

I'm maxed out. At 11.3psi I'm at 5Vs around 7200-7200 rpms. When I log it in UpRev one MAF sensor reads 5.0 and the other is like 4.95. I can't say which one is maxing because the chart in UpRev doesn't differentiate.

Phunk - I also think it's about return fuel setup time. Need to get on the phone with you and discuss a few items to determine what's the best direction.

I have the same hp/tq goal for my car, 475hp/425tq DD and 525hp/475tq drag.

Anyhoo, back to the VSR build.

YzGyz

jwick · 01-23-2015, 11:23 AM

My 3" upgrade is being fabricated as we speak

COSMO · 01-23-2015, 11:29 AM

How much more boost are you going to push your car on a stock block?

Quote:

Originally Posted by jwick

My 3" upgrade is being fabricated as we speak

COSMO · 01-23-2015, 11:36 AM

At around 17psi mine are 4.7V and that's with my 3" intake tubes..
Still waiting to see that Mullet Hair do with your new mustang......

Boosted Performance · 01-23-2015, 12:56 PM

Quote:

Originally Posted by COSMO

No I don't think you would loose any torque but the curve would change.. You have to figure the ID ( inner diameter) of that 3" exhaust is probably 2.75 depending on the wall thickness. Turbo/ turbo's need No backpressure, Superchargers need some though...

Inside diameter of a 3" piece of tubing is 2 7/8". Standard thickness is .065" (1/16") on exhaust tubing.

Quote:

Originally Posted by COSMO

Also that turbo is rated at 750hp since it is non ball bearing so I was expecting atleast 700whp on e85.. The max on that turbo should be right around 36psi..

The compressor is rated to flow 75lbs/min, and the fact that it is a BB turbo does not change that spec. Remember, the compressor can flow that much, but a small turbine can't. So when looking at a turbo and the HP rating, always assume that the HP rating is for the largest turbine available for that particular turbo.

Quote:

Originally Posted by COSMO

Here is a dyno I found from a Toyota supra using a 6266,6466, and 6766 precision turbo.. Notice the 36 psi but also keep in mind the toyo has a 3.0 liter motor and the z is a 3.7. The z will allow more air flow volume so 36 psi would not be needed...

Also, comparing a 2JZ engine to the VHR engine should not be done. They are very different. The VHR heads will flow 4 times more air...again, flow will reduce pressure and increase efficiency.

I have customers using the 6266 turbo on the VQ35, and making mid 600's on pump gas at 18psi of boost, not E85. The big difference is flow, because they all have the large T4 turbine housing.

Quote:

Originally Posted by COSMO

The 2.5 in your case is fine because you have aftermarket MAF's.. The stock would have maxed out at 17psi with 2.5" intake tubes..

Pressure and flow are two very different things, and if you can run 17psi of boost on the stock MAF's, then you have no flow (since this is what the MAF sensors measure). If you don't have flow, something is choking the system.

phunk · 01-23-2015, 11:47 AM

You got a long way to go.... if I recall correctly, the last few tenths of a volt are good for over 100hp. Anyone agree or disagree with that? I didnt really start paying attention to my MAF voltage until passing 550 and I believe i was already in the 4.7-4.8v at that point.

you got a long way to go with my hair too, its currently about a half inch long in the back.

COSMO · 01-23-2015, 04:24 PM

The comparison between the 2jz motor was just to show the psi rating for that turbo.

Wasn't sure of the inner diameter of the 3" exhaust but non the less it should be bigger to allow for more flow.

Sure you can run 17 psi on the stock maf's but it's really pushing the limitations due to the resolution.

Sasha has spoken everyone and for someone who makes these kits part time we should all listen too and never say anything without checking with him first...

Boosted Performance · 01-23-2015, 07:40 PM

Quote:

Originally Posted by COSMO

The comparison between the 2jz motor was just to show the psi rating for that turbo.

Wasn't sure of the inner diameter of the 3" exhaust but non the less it should be bigger to allow for more flow.

Sure you can run 17 psi on the stock maf's but it's really pushing the limitations due to the resolution.

Sasha has spoken everyone and for someone who makes these kits part time we should all listen too and never say anything without checking with him first...

Again, pressure is a result of resistance to flow, so comparing boost pressure between two very different engines with very different VE's is non constructive.

You can pressure up the charge tubes to 100 psi if you want, measure the MAF voltage, and they will read 0 Volts. It is a mass air FLOW sensor, not a pressure sensor.

I am sorry if my knowledge and experience sharing with the comunity is offending you. I build the kits, and have been for a long time. The feedback I get from pro-tuners is really what matters...so when they say that the MAF sensors are maxed out at 11-12 psi (with 2.75" pipes), it means that the system is working very efficiently and the engine is actually ingesting a lot of air. This is with the 2.75" charge pipes. I suspect that the 3" should be good to about 15 psi, assuming EBP is low and the turbines are capable of good flow.

You seem to have some hard feelings towards me...and I have a couple of guesses why. Just remember that in the end it was your call.

Trips · 01-24-2015, 07:34 PM

Lets try to keep on topic and civil.

Thanks

MidnightBlueZ · 01-24-2015, 09:53 PM

Bobby is shooting the video tomorrow. So I would say it should be ready to watch in a day or so if not the same day. Looking forward to it!

MidnightBlueZ · 01-26-2015, 07:36 PM

Ordered an SPL rear knuckle monoball bushing kit and Whiteline diff bushings today. Also picked up some wheels and tires locally for a great deal. Wheels have tpms sensors Nismo valve stems and better rubber than my current stock wheels do. Wheels are varrstoen TE37 reps but who cares?

19x9.5 +22 255/35 Toyo T1R
19x10.5 +22 285/35 Toyo T1R

Fronts have good tread with lots of life. The rears not so much but should be good until I can get some R888s!

jwick · 01-26-2015, 07:46 PM

The diff bushings definitely help but the install sucks

You going with a 305 on the rear when you get new rubber?

MidnightBlueZ · 01-26-2015, 08:15 PM

Haven't decided yet man it's either 295 or 305.. I know once you get past 295 it jumps in price quite a bit.

Yeah looks that way so I just decided to let Bobby handle it while it's still down at the shop. That way once I get back I can just install my springs and camber kit, throw on the wheels and see how she does. On a unnaturally warm day of course. It's getting cold here now so not sure how many of those there will be.

MidnightBlueZ · 02-01-2015, 10:49 AM

Video being shot today since the weather didn't cooperate last time. The new bushings are all in as well! They are using this lovely lady for some added flavor in the shoot.. Her name is Anie Perez if any of you wanna give her a follow on FB etc.

MidnightBlueZ · 02-02-2015, 10:23 PM

Here's the video from yesterday. Nice to see the car again after the long journey. Bobby was throwing those one liners lol. Enjoy!

01-23-2015, 11:23 AM	#2 (permalink)
jwick A True Z Fanatic Join Date: Dec 2010 Location: Houston Posts: 14,532 Drives: '10 G37 6MT Rep Power: 2465057	My 3" upgrade is being fabricated as we speak David Parra and GaleForce like this. __________________ '10 G37T 6MT Graphite/Graphite - BP - G37T Build

01-23-2015, 11:47 AM	#6 (permalink)
phunk A True Z Fanatic Join Date: Mar 2009 Location: Chicago Posts: 3,669 Drives: 370 Rep Power: 974724	You got a long way to go.... if I recall correctly, the last few tenths of a volt are good for over 100hp. Anyone agree or disagree with that? I didnt really start paying attention to my MAF voltage until passing 550 and I believe i was already in the 4.7-4.8v at that point. you got a long way to go with my hair too, its currently about a half inch long in the back. COSMO likes this. __________________ Charles @ CJ Motorsports : Website \| Facebook \| Instagram \| YouTube Home of the 9 second, stock longblock, stock drivetrain 6MT 370z. 9.91 @ 142mph Last edited by phunk; 01-23-2015 at 03:23 PM.

01-24-2015, 07:34 PM	#9 (permalink)
Trips Administrator Join Date: May 2009 Location: Disneyland, Ca Posts: 8,732 Drives: 🔰 Rep Power: 10	Lets try to keep on topic and civil. Thanks __________________

01-26-2015, 07:46 PM	#12 (permalink)
jwick A True Z Fanatic Join Date: Dec 2010 Location: Houston Posts: 14,532 Drives: '10 G37 6MT Rep Power: 2465057	The diff bushings definitely help but the install sucks You going with a 305 on the rear when you get new rubber? __________________ '10 G37T 6MT Graphite/Graphite - BP - G37T Build

01-26-2015, 08:15 PM	#13 (permalink)
MidnightBlueZ Enthusiast Member Join Date: Apr 2013 Location: Nashville, TN Posts: 291 Drives: 13 Nissan 370Z Turbo Rep Power: 17	Haven't decided yet man it's either 295 or 305.. I know once you get past 295 it jumps in price quite a bit. Yeah looks that way so I just decided to let Bobby handle it while it's still down at the shop. That way once I get back I can just install my springs and camber kit, throw on the wheels and see how she does. On a unnaturally warm day of course. It's getting cold here now so not sure how many of those there will be. Last edited by MidnightBlueZ; 01-26-2015 at 08:39 PM.

01-23-2015, 11:36 AM	#4 (permalink)
COSMO A True Z Fanatic Join Date: Dec 2012 Location: FL Posts: 1,816 Drives: 2012 Touring GTM TT Rep Power: 20	At around 17psi mine are 4.7V and that's with my 3" intake tubes.. Still waiting to see that Mullet Hair do with your new mustang......

01-23-2015, 04:24 PM	#7 (permalink)
COSMO A True Z Fanatic Join Date: Dec 2012 Location: FL Posts: 1,816 Drives: 2012 Touring GTM TT Rep Power: 20	The comparison between the 2jz motor was just to show the psi rating for that turbo. Wasn't sure of the inner diameter of the 3" exhaust but non the less it should be bigger to allow for more flow. Sure you can run 17 psi on the stock maf's but it's really pushing the limitations due to the resolution. Sasha has spoken everyone and for someone who makes these kits part time we should all listen too and never say anything without checking with him first...

01-24-2015, 09:53 PM	#10 (permalink)
MidnightBlueZ Enthusiast Member Join Date: Apr 2013 Location: Nashville, TN Posts: 291 Drives: 13 Nissan 370Z Turbo Rep Power: 17	Bobby is shooting the video tomorrow. So I would say it should be ready to watch in a day or so if not the same day. Looking forward to it!

02-02-2015, 10:23 PM	#15 (permalink)
MidnightBlueZ Enthusiast Member Join Date: Apr 2013 Location: Nashville, TN Posts: 291 Drives: 13 Nissan 370Z Turbo Rep Power: 17	Here's the video from yesterday. Nice to see the car again after the long journey. Bobby was throwing those one liners lol. Enjoy! Last edited by MidnightBlueZ; 02-02-2015 at 11:13 PM.

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