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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars |
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11-05-2014, 07:23 PM | #1 |
Zilvia Junkie
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New Garrett GTW Turbo
Garrett just released at SEMA, a new entry level turbo. Not much info out there. If you find any information share with your fellow Zilviains.
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11-05-2014, 08:22 PM | #3 |
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Maybe they've finally decided to match their compressors to their turbines.
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11-06-2014, 07:35 AM | #13 | |
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Quote:
Silly people.
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11-06-2014, 09:58 AM | #16 |
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"Dual Cermanic Ball Bearing" hahaha got a chuckle outta me. Cant believe their marketing material has a typo....at SEMA to boot. Of course that's the one thing I pick on from an otherwise awesome product intro from Garrett.
If spool time and cost are same to GTX2867R I can see this being the new 350-450whp go to turbo for T28 setup guys. |
11-06-2014, 10:00 AM | #17 |
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I will 'assume' yes..primarily on the point of spool time. Excited for more info...as i planned on 2867 setup for next year. this makes it interesting.
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11-06-2014, 10:18 AM | #18 | |
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New Garrett GTW Turbo
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When will this billet wheel = faster spool myth die?
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11-06-2014, 10:28 AM | #19 |
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11-06-2014, 11:53 AM | #20 |
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yeah sure, but i dont want anything over 400rwhp. Better response and spool time with 370-400hp sounds interesting.
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11-06-2014, 12:24 PM | #22 |
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11-06-2014, 12:36 PM | #23 | |
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I seen your posts on the gt2871r thread, by the looks of things it sounds to me that your choice of turbo is the GTX2867r. |
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11-06-2014, 01:37 PM | #24 | ||
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Precision is who I blame for spouting off all this nonsense about billet wheels "spooling faster". It simply doesn't happen. Billet wheels are often heavier than the cast wheels they replace. They do have more aggressive aero, possibly helping them generate airflow with less shaft speed than the cast wheel, this WILL however, become a trade off at the top end. I guarantee you if you compare shaft speeds there would be very little difference in a billet vs. cast wheel comparison as far as time-to-speed. Quote:
The GT2867 has a better compressor/turbine match than the 2871R, and thus will offer nearly the same power with less lag. Some of you guys must think the GTX3076R is a good turbo.
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11-06-2014, 02:17 PM | #25 | |
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As far as weight is concerned, I have not weighed them personally or seen the weights posted. But to be fair, I have not researched the weights either. http://www.learntotune.com/discussio...ett-gtx-vs-gt/ http://turbosix.blogspot.com/2012/12...s-gt-3076.html Dyno Graphs of a DIRECT comparison! GTX on the left of the graph A Garrett GTX was my choice initially until I get an inside line on a EFR. 6258. Currently installed on a SR and loving it! |
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11-06-2014, 02:37 PM | #26 |
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New Garrett GTW Turbo
And that, my friend, is evidence of the GTX's increased efficiency at moving air at low shaft speeds. Maybe I'm delving too deep into the semantics of "spool up" here, but I highly doubt there is a difference in shaft speed given the rest of the powerband is nearly identical. A truly "faster spooling" turbo would increase the entire powerband. GTX's do not like high PR's, The compressor map is not wide enough and the turbines are too small (except on 3067 and 3576). I have personally experienced this on several cars that have gone through the shop.
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11-06-2014, 04:05 PM | #27 | |
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Quote:
However, I do understand the more efficient nature of the GTX wheel, but overall, as far as I am concerned, the idea is not necessarily more power, but better transient, boost recovery and spoolup characteristic. As the graph below depicts, and my experience, the wheel is capable of flowing more at lower wheel speeds and is able to attain the set flow limit sooner, but overall to me, that is the characteristic of better "spoolup" time As far as a faster spooling turbo having more power, in terms of flow rate EDIT: AT SPECIFIED turbo speeds, YES. In terms of time spent getting to a specified flow rate (if it is a specified flow rate, then you cannot have more flow rate in the same sense and have the units of measure be the same) at a quicker rate, then NO. My other graph which didn't load, so below is it 2) The idea behind my statement is not that GT turbos like a high PR (my mistake in comparing it to a EFR), but to make more power than a similar cast wheel variant, you need more boost. 3) To me it sounds like you are more hung up with the terrible work Garrett did of matching up the wheels as compared to the wheel design itself Last edited by RalliartRsX; 11-06-2014 at 06:50 PM.. |
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11-06-2014, 06:29 PM | #28 | |
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New Garrett GTW Turbo
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Yes, yes I am, hahahha. The GTX wheel is not a bad design at all. Turbos like the 3067 and 3576 do their jobs admirably. I would still prefer a BorgWarner though. They seem to have a better collection of turbos that make sense in a performance application, though they are a few that seem to miss the mark from them as well. They also continue to update their "base" Airwerks models, which is awesome.
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11-06-2014, 06:46 PM | #29 |
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Packaging is the BIGGEST issue with the EFR........
I have a writeup elsewhere on my install woes with the EFR 6258 in bottom mount variant and hated every single moment of the install....... Top Mount EFR with a FR mani/downpipe is the way to go hands down! Sorry to derail from the Garrett |
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