Nissan 370Z Forum - GTM Performance Engineering: MHI Twin Turbo Official Release

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- - GTM Performance Engineering: MHI Twin Turbo Official Release (http://www.the370z.com/forced-induction/68491-gtm-performance-engineering-mhi-twin-turbo-official-release.html)

Mr.Squeeze

10-09-2013 09:27 AM

Quote:

Originally Posted by G37sHKS (Post 2520912)

Go with external wastegate. my boost gauge was reading 8.8 PSI while the internal wastegate spring was 7 PSI.

1.8 PSI of boost creep is a lot if you ask me. Im not so sure if going with .86 housing will eliminate the boost creep or will just minimize it (which is still not good)

So just to be in safe side. go with external wastegate. you will have better boost response, better flow, more power, and last but not least, it will extend the life of turbo.

Yes you heard me right it will extend the life of turbo and will give better power and more power.

Please watch this video to learn more about external and internal :tiphat:

Nice video

For the amount of money that is spent on a turbo kit especially your going to upgrade down the line witch at some point we all do. It is just better to get the External Gates and not have to deal with the issue that come along with internal gates.

Chuck33079

10-09-2013 09:30 AM

Quote:

Originally Posted by Mr.Squeeze (Post 2521487)

For the amount of money that is spent on a turbo kit especially your going to upgrade down the line witch at some point we all do. It is just better to get the External Gates and not have to deal with the issue that come along with internal gates.

Exactly. Don't paint yourself into a corner right off the bat.

puckshaw

10-10-2013 07:55 PM

I talked to Mike today and he said not to worry about boost creep with the .84 A/R and internal wastegates. I'm sticking with that setup.

Dzel	10-10-2013 08:55 PM

Yeah but that's only if you want to stay under say 550 hp. Anything more and you ARE going to need to go external.

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puckshaw

10-10-2013 09:04 PM

Quote:

Originally Posted by Dzel (Post 2523857)

Yeah but that's only if you want to stay under say 550 hp. Anything more and you ARE going to need to go external.

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Not necessarily but I won't be going for those power levels either way.

09nismo498

10-10-2013 09:05 PM

im going internal wastegates as well. im staying around 500hp, then when the need for more speed comes about, ill buy a gtr :)

BlkNismo

10-11-2013 12:23 AM

Is the GTX2860 an upgradable option? Would this be a beneficial upgrade over the standard GT2860?

SPOHN

10-11-2013 05:59 AM

Quote:

Originally Posted by BlkNismo (Post 2523970)

Is the GTX2860 an upgradable option? Would this be a beneficial upgrade over the standard GT2860?

It would be for sure. I've thought about that too.

Alstann

10-11-2013 10:31 AM

Quote:

Originally Posted by SPOHN (Post 2524050)

It would be for sure. I've thought about that too.

If I'm right with my somewhat limited knowledge, I would think the GTX-series, especially at our low boost applications, wouldn't be a crazy huge upgrade. I think the GTX-series would improve transient response, but as for efficiency, we would probably see no difference at the 8-11psi range, really.

Jayhovah

10-13-2013 10:08 AM

Is everyone going to go Uprev? I'd like to go ecutek just to save a couple bucks on EBC if I can. What are the rest of you turn-key customers going to choose?

Can't wait to see these kits coming out and getting installed! Going to be a flood of dyno charts coming on here when this thing starts shipping.

Mr. Q

10-13-2013 10:34 AM

I chose the ecutek option

GrooveStyle

10-13-2013 11:15 AM

Same here. Went with ecutek, and the GT2860RS with 0.86 housings. Yeah, it's going to be pretty awesome when everyone starts building...

esfourteen

10-13-2013 01:22 PM

Quote:

Originally Posted by BlkNismo (Post 2523970)

Is the GTX2860 an upgradable option? Would this be a beneficial upgrade over the standard GT2860?

theres virtually no benefits in upgrading to the GTX on the stock engine, look at the compressor maps. the gt2860 is good for about 580-620whp @ 18-20psi on pump gas with our engine, you could run a bit more boost with meth or e85 but its starting to overspin the turbo and will shorten its life.

if you were planning on running more than 20psi, thats when the GTX really shines, on our engine you could easily run 25-28psi on those turbos without going past its efficiency range, they are good for about 650-680whp. its like getting the response of a gt2860 with the top end of a gt2871r.

Nixlimited

10-13-2013 02:00 PM

Quote:

Originally Posted by Jayhovah (Post 2526057)

I am not sure they have actually gotten that functionality working in Ecutek. Just like the many other premature announcements around these parts.

Mkai0

10-13-2013 02:27 PM

Quote:

Originally Posted by Nixlimited (Post 2526195)

I am not sure they have actually gotten that functionality working in Ecutek. Just like the many other premature announcements around these parts.

I hear you, I have yet to hear anything about Ecutek finalizing this feature (boost control) on the VQ platforms. Once the E85 Flex Fuel option is offered on the VQ platform, that is when I'll make the switch.

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