How much boost pressure can a built VQ37VHR withstand?

Arrvaxx · 08-08-2014, 07:11 AM

You don't need a built engine to make 600-650. My F.I. twins make 604 on 100 octane with 14lbs of boost and an E85 car makes 620.

TopgunZ · 08-08-2014, 08:32 AM

Quote:

Originally Posted by Arrvaxx

You don't need a built engine to make 600-650. My F.I. twins make 604 on 100 octane with 14lbs of boost and an E85 car makes 620.

This is true. But for how long? We don't have the data yet. But his built engine at 600 will no doubt last longer than stock.

When I was running my 350z at 430whp...every time I got on her hard I prayed she would hold together..lol..

Built engines offer a piece of mind and allow you to have more fun vs. riding the ragged edge.

theDreamer · 08-08-2014, 08:43 AM

Quote:

Originally Posted by TopgunZ

This is true. But for how long? We don't have the data yet. But his built engine at 600 will no doubt last longer than stock.

When I was running my 350z at 430whp...every time I got on her hard I prayed she would hold together..lol..

Built engines offer a piece of mind and allow you to have more fun vs. riding the ragged edge.

But at the same time opening up the engine can bring about a whole new set of issues.
I would say this car, if taken well of can survive quite well at 550-600whp on e85. A prime example of that is Phunk, he has 50-60k miles with his greddy TT kit making over 550 (if not 600) on e85.

In terms of boost pressure, the highest I have seen currently it John's 370z TT: John’s 370Z TT+ |
They hit about 25PSI though it seems and 800whp & 700TQ.

jwick · 08-08-2014, 09:11 AM

Quote:

Originally Posted by theDreamer

But at the same time opening up the engine can bring about a whole new set of issues.
I would say this car, if taken well of can survive quite well at 550-600whp on e85. A prime example of that is Phunk, he has 50-60k miles with his greddy TT kit making over 550 (if not 600) on e85.

37winner · 08-09-2014, 03:05 AM

Quote:

Originally Posted by theDreamer

But at the same time opening up the engine can bring about a whole new set of issues.
I would say this car, if taken well of can survive quite well at 550-600whp on e85. A prime example of that is Phunk, he has 50-60k miles with his greddy TT kit making over 550 (if not 600) on e85.

In terms of boost pressure, the highest I have seen currently it John's 370z TT: John’s 370Z TT+ |
They hit about 25PSI though it seems and 800whp & 700TQ.

I'm more interested in that GTR manifold! Someone please shed some light on this!

tturbo370z · 08-09-2014, 01:51 PM

Quote:

Originally Posted by 37winner

I'm more interested in that GTR manifold! Someone please shed some light on this!

Other than being an expensive unicorn and handling so far 26psi of boost. I would wait for Charles, specialty Z or someone else to make a worthy intake that is proven to make power. I have no before or after dyno so I cant tell u if it helped me make power or the opposite. I do know that I had to have custom billet fuel rails made to accomadate the intake conversion as well as repipe my charge piping. Save your money and wait. Plus I doubt anyone will ever see another one come out. I may be wrong and for me rarity is better. Waiting will provide proven results and more bang for your buck IMO. But who knows when that will be...

37winner · 08-09-2014, 02:04 PM

Quote:

Originally Posted by tturbo370z

Other than being an expensive unicorn and handling so far 26psi of boost. I would wait for Charles, specialty Z or someone else to make a worthy intake that is proven to make power. I have no before or after dyno so I cant tell u if it helped me make power or the opposite. I do know that I had to have custom billet fuel rails made to accomadate the intake conversion as well as repipe my charge piping. Save your money and wait. Plus I doubt anyone will ever see another one come out. I may be wrong and for me rarity is better. Waiting will provide proven results and more bang for your buck IMO. But who knows when that will be...

Thanks for the info! I'm curious as to when your saying worth intake. Is something wrong with the gtr intake manifold? I figure going from plastic to whatever material the gtr material is, it would be much better.

So how did you get that conversion made? I'm very interested! Please do share!

Arrvaxx · 08-08-2014, 11:09 AM

Quote:

Originally Posted by TopgunZ

This is true. But for how long? We don't have the data yet. But his built engine at 600 will no doubt last longer than stock.

When I was running my 350z at 430whp...every time I got on her hard I prayed she would hold together..lol..

Built engines offer a piece of mind and allow you to have more fun vs. riding the ragged edge.

But really how much does a new engine cost vs all the built money? I understand building for 700 or 800 hp but at 600-650 I would rather just put the money in the bank and buy a new engine if something blew up. They really aren't that expensive.

TopgunZ · 08-08-2014, 12:34 PM

Quote:

Originally Posted by Arrvaxx

But really how much does a new engine cost vs all the built money? I understand building for 700 or 800 hp but at 600-650 I would rather just put the money in the bank and buy a new engine if something blew up. They really aren't that expensive.

How much is an OEM engine?

theDreamer · 08-08-2014, 01:33 PM

Quote:

Originally Posted by TopgunZ

How much is an OEM engine?

6-8k I believe.

jwick · 08-08-2014, 01:40 PM

Quote:

Originally Posted by theDreamer

6-8k I believe.

I can get a built one installed for that same $8k. I'll gladly go built just so I know it can handle the power.

DEpointfive0 · 08-08-2014, 02:17 PM

Quote:

Originally Posted by theDreamer

6-8k I believe.

eBay, 3k

TopgunZ · 08-08-2014, 02:54 PM

Quote:

Originally Posted by theDreamer

6-8k I believe.

Exactly. Why bother with another stock if you can build for same?

Arrvaxx · 08-08-2014, 03:05 PM

Quote:

Originally Posted by TopgunZ

Exactly. Why bother with another stock if you can build for same?

Because stock is stock. Tried, true, tested with tens of thousands of cars and millions upon millions in R&D. Sorry but bolting on something is one thing. You open the engine up and you could be headed for disaster.

Like I said, it would be one thing if you wanted to push the car past 650 in to the 700s but it seems like a silly thing to do for a power level that has proven to run just fine. Why not just replace the engine with something that comes stock at 650hp? Put a GT-R engine in it. I think it is safer than building.

My 2 cents.

08-08-2014, 07:11 AM	#1 (permalink)
Arrvaxx A True Z Fanatic Join Date: Jul 2013 Location: Whore Island, MN Posts: 1,243 Drives: 40th F.I. Twin Turbo Rep Power: 19	You don't need a built engine to make 600-650. My F.I. twins make 604 on 100 octane with 14lbs of boost and an E85 car makes 620. TerribleONE, Hotrodz and jchammond like this. __________________ 2010 370Z 40th Anniversary (#480 born 1/19/2010) Fast Intentions Twin Turbo \| Varis Arising II \| Limited Edition Recaro Sportster \| Tuned by Specialty Z \| 604hp 525 torque @14lbs boost on 100 octane

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