How much boost pressure can a built VQ37VHR withstand?

KratikosG37 · 11-06-2014, 09:41 AM

Quote:

Originally Posted by jwick

Is this your dyno? If so, are you running the ball bearing or journal bearing?

GT28RS.86

Quote:

Originally Posted by FPenvy

i love this thread. so full of cock fighting and dick measuring over turbo size, spool speed, where the tq comes in.

next thing i'm waiting for is people comparing who's VTEC kicks in sooner.......

Quote:

Originally Posted by TopgunZ

Actually, I am just making sure the community if well informed of the capabilities of certain kits. I would hate to see some guy buy a GTM kit in fear that a single will be laggy and underperform. Forums are meant to be educational and not give people false information.

Jwick. That is my dyno. Actually one where I was running off spring pressure only. You can see this by the way my boost drops off really bad up top. The WG springs get hot and loosen up. This is why nobody should ever run off springs alone. After I figured out my MBC it held boost evenly across the range.

Thanks for the info mothergoose. Being well informed is the way to be, like i've said i'm the last to give adivce, but I wasn't wrong about powerband (just RMP).

In less you're running some cvic sized single turbo twins will always boost faster.

What size and turbo style you have?

TopgunZ · 11-06-2014, 09:46 AM

Quote:

Originally Posted by KratikosG37

What size and turbo style you have?

The standard BP kit turbo.

jwick · 11-06-2014, 09:47 AM

Quote:

Originally Posted by TopgunZ

The standard BP kit turbo.

He's a PT6266 Ball Bearing Bro with me

jwick · 11-06-2014, 09:49 AM

Quote:

Originally Posted by KratikosG37

GT28RS.86

Thanks for the info mothergoose. Being well informed is the way to be, like i've said i'm the last to give adivce, but I wasn't wrong about powerband (just RMP).

In less you're running some cvic sized single turbo twins will always boost faster.

What size and turbo style you have?

And a single is going to make more torque than TT and be more efficient since you are only dealing with the loses of one turbo, not two.

That was mostly for you Presto, you and your

KratikosG37 · 11-06-2014, 09:56 AM

Quote:

Originally Posted by jwick

He's a PT6266 Ball Bearing Bro with me

Precision makes great turbos, The LMR twin kit for C7 is down right beastly.

Quote:

Originally Posted by jwick

And a single is going to make more torque than TT and be more efficient since you are only dealing with the loses of one turbo, not two.

That was mostly for you Presto, you and your

jwick · 11-06-2014, 09:45 AM

Quote:

Originally Posted by TopgunZ

Actually, I am just making sure the community if well informed of the capabilities of certain kits. I would hate to see some guy buy a GTM kit in fear that a single will be laggy and underperform. Forums are meant to be educational and not give people false information.

Jwick. That is my dyno. Actually one where I was running off spring pressure only. You can see this by the way my boost drops off really bad up top. The WG springs get hot and loosen up. This is why nobody should ever run off springs alone. After I figured out my MBC it held boost evenly across the range.

I got the ball bearing upgrade. I also have that 16* timing to help spool thanks to the E.

What spring did you install?

And I second your statements of a single. Mine comes on hard and fast. I'd be shocked if an equivalent TT spools more than a couple hundred rpms faster.

TopgunZ · 11-06-2014, 09:49 AM

Quote:

Originally Posted by jwick

What spring did you install?

And I second your statements of a single. Mine comes on hard and fast. I'd be shocked if an equivalent TT spools more than a couple hundred rpms faster.

I installed the 10.5lb springs. I think they were black. They do have a +/- tolerance range of 1.5lbs though.

Another good reason to never run spring pressure alone. I was seeing 11lbs of boost on the initial run and it slowly tapered off when things started heating up. Pretty soon I was down to 9lbs and falling off hard up top.

KratikosG37 · 11-06-2014, 10:16 AM

What happen to the build and what's the dyno chart like?

TopgunZ · 11-06-2014, 10:33 AM

Quote:

Originally Posted by KratikosG37

What happen to the build and what's the dyno chart like?

Here you go. Those DE engines were only good for about 425whp before they let go. So instead of building that engine and putting on a smaller pulley and turning up the boost...I just sold both kits, the car, and bought the VHR.

BUT...Were we just speaking of 400tq at 4K. I had 411 by 3250...Lol..

jwick · 11-06-2014, 10:38 AM

Quote:

Originally Posted by TopgunZ

Here you go. Those DE engines were only good for about 425whp before they let go. So instead of building that engine and putting on a smaller pulley and turning up the boost...I just sold both kits, the car, and bought the VHR.

BUT...Were we just speaking of 400tq at 4K. I had 411 by 3250...Lol..

Nice...but I hit 400wtq around 3250ish

BBRSpeedWorks · 11-06-2014, 10:39 AM

Quote:

Originally Posted by TopgunZ

Here you go. Those DE engines were only good for about 425whp before they let go. So instead of building that engine and putting on a smaller pulley and turning up the boost...I just sold both kits, the car, and bought the VHR.

BUT...Were we just speaking of 400tq at 4K. I had 411 by 3250...Lol..

Idk y everybody think singles spool slow....I'm just wondering if I'm going to be laggy after my built motor goes in...

TerribleONE · 11-06-2014, 10:40 AM

Quote:

Originally Posted by BBRSpeedWorks

Idk y everybody think singles spool slow....I'm just wondering if I'm going to be laggy after my built motor goes in...

What are you dropping the compression down to?

BBRSpeedWorks · 11-06-2014, 10:42 AM

Quote:

Originally Posted by TerribleONE

What are you dropping the compression down to?

9:1...

KratikosG37 · 11-06-2014, 10:58 AM

Quote:

Originally Posted by BBRSpeedWorks

Idk y everybody think singles spool slow....I'm just wondering if I'm going to be laggy after my built motor goes in...

I don't think that. It all depends on kit, tune, and engine set up.

Most single turbos don't spool as fast as twins. That's my point when you said, "I don't spin".

TopgunZ · 11-06-2014, 11:11 AM

A properly sized turbo (like the 6266) will not be laggy. Singles get a bad rep as being that way because guys in Evo's and STI's are running giant turbos and are going for 800whp out of a 4 cyclinder engine. Those things are laggy as hell.

The fact that we have 3.7 liters of displacement makes us singles comparable to twins. Twins will still spool the fastest though. Now if they weren't just so damn hard to install.......

11-06-2014, 10:16 AM	#8 (permalink)
KratikosG37 Enthusiast Member Join Date: Jun 2014 Location: New Orleans, LA Posts: 273 Drives: 09 TT Wrapped G37 Rep Power: 12	What happen to the build and what's the dyno chart like? __________________ KratikosG37 Build Log http://www.myg37.com/forums/build-th...ml#post3888739

11-06-2014, 11:11 AM	#15 (permalink)
TopgunZ A True Z Fanatic Join Date: Jun 2012 Location: Minneapolis Posts: 2,651 Drives: 06 350Z , 09 370Z MT Rep Power: 6835	A properly sized turbo (like the 6266) will not be laggy. Singles get a bad rep as being that way because guys in Evo's and STI's are running giant turbos and are going for 800whp out of a 4 cyclinder engine. Those things are laggy as hell. The fact that we have 3.7 liters of displacement makes us singles comparable to twins. Twins will still spool the fastest though. Now if they weren't just so damn hard to install....... jwick likes this. __________________ ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM

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