|
Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars |
|
Thread Tools | Display Modes |
11-07-2017, 10:00 PM | #31 |
I'm interested to know where they were leaking from? Comp housing? Exhaust housing?
|
|
Sponsored Links |
11-08-2017, 05:31 AM | #32 |
Zilvia Addict
Join Date: Jul 2011
Location: Philadelphia
Age: 33
Posts: 850
Trader Rating: (7)
Feedback Score: 7 reviews
|
The turbine on the G25-660 is only 85% the size of the EFR7163 and the compressor is 94% the size yet it flows the same. Efficiency is 79% vs 74% on the EFR. Hands down, Garrett's turbine/compressor aero is better. The only thing keeping the EFR competitive is the TiAl turbine material, if Garrett made a TiAl version of the G25-660 it'd be no contest.
__________________
My S13 SR Street Mod Build |
11-08-2017, 12:35 PM | #33 | |
Zilvia.net Advertiser
Join Date: Nov 2005
Location: Michigan
Age: 36
Posts: 5,574
Trader Rating: (16)
Feedback Score: 16 reviews
|
Quote:
I’m excited for further products in the G-series line. The next step up in turbine size is going to get real rowdy!
__________________
Build: http://zilvia.net/f/showthread.php?t=643065 Friends don't let friends buy knock-offs. |
|
08-11-2020, 05:22 PM | #34 |
Zilvia.net Advertiser
Join Date: Nov 2005
Location: Michigan
Age: 36
Posts: 5,574
Trader Rating: (16)
Feedback Score: 16 reviews
|
Alright, who's got 'em? Post results here!
__________________
Build: http://zilvia.net/f/showthread.php?t=643065 Friends don't let friends buy knock-offs. |
08-12-2020, 01:35 AM | #36 |
Post Whore!
Join Date: Oct 2004
Location: San Francisco, CA
Posts: 5,998
Trader Rating: (13)
Feedback Score: 13 reviews
|
^^That is antilag on a battery.... I guess sooner or later gotta have a bigger battery and a bigger alternator..... cool stuf thanks for sharing!
https://www.caranddriver.com/news/a3...turbo-engines/
__________________
Turn and Burn! |
08-12-2020, 08:46 AM | #38 |
Post Whore!
|
|
08-12-2020, 08:46 AM | #39 | |
Zilvia FREAK!
Join Date: Jan 2010
Location: SoCal/Ft Worth TX
Age: 30
Posts: 1,563
Trader Rating: (5)
Feedback Score: 5 reviews
|
Quote:
__________________
|
|
08-12-2020, 09:06 AM | #41 | |
Zilvia.net Advertiser
Join Date: Nov 2005
Location: Michigan
Age: 36
Posts: 5,574
Trader Rating: (16)
Feedback Score: 16 reviews
|
Quote:
Yeah I've seen it, was just curious about other combinations.
__________________
Build: http://zilvia.net/f/showthread.php?t=643065 Friends don't let friends buy knock-offs. |
|
08-13-2020, 07:18 AM | #43 |
Zilvia Addict
Join Date: Oct 2013
Location: Denver Colorado
Age: 39
Posts: 613
Trader Rating: (4)
Feedback Score: 4 reviews
|
Lz has a video on his built Sr with a g25-550 on the Dyno. Iirc it made 500 on stock fuel lines or very close to it. With solid response on a stock intake manifold. If I was to run one of these it would be with a mazworx intake manifoldz or the stock intake manifold and have it extrude honed.
__________________
Need aftermarket parts? PM or DM me competitive pricing! IG@S13Guille |
08-13-2020, 07:55 AM | #44 |
Post Whore!
Join Date: Sep 2004
Location: Independence, Ore.
Age: 39
Posts: 2,715
Trader Rating: (24)
Feedback Score: 24 reviews
|
^^Just shy of 500whp on e85 and stock intake manifold. Though I think it was like 95* on that day, too.
I'm planning to grab one this winter -- still undecided between the 550 or 660 (leaning towards 660 because why not?), but I bought the mazworx intake manifold already... |
08-21-2020, 06:17 PM | #46 | |
Zilvia Addict
Join Date: Feb 2014
Location: Arizona ٩( ᐛ )و Subaru Parts Consultant
Age: 29
Posts: 848
Trader Rating: (3)
Feedback Score: 3 reviews
|
Quote:
My SR is built with slightly bumped compression, ported/polished head, Tomei 260 cams, Greddy manifold and will be on ethanol. I've got the .72 housing on mine, kinda worried its going to be a choke point, but we'll see once I get its a little later this year. Will report back with numbers!
__________________
|
|
08-21-2020, 06:59 PM | #47 | |
Zilvia.net Advertiser
Join Date: Nov 2005
Location: Michigan
Age: 36
Posts: 5,574
Trader Rating: (16)
Feedback Score: 16 reviews
|
Quote:
__________________
Build: http://zilvia.net/f/showthread.php?t=643065 Friends don't let friends buy knock-offs. |
|
08-21-2020, 09:29 PM | #48 |
Post Whore!
Join Date: Sep 2004
Location: Independence, Ore.
Age: 39
Posts: 2,715
Trader Rating: (24)
Feedback Score: 24 reviews
|
^That's kind of where i'm at. Either g25-660, or g30-660. From look at ATP it seems they run the same inlet/outlet flanges, too, so easy enough to swap around.
|
08-21-2020, 10:56 PM | #49 | |
Zilvia Addict
Join Date: Feb 2014
Location: Arizona ٩( ᐛ )و Subaru Parts Consultant
Age: 29
Posts: 848
Trader Rating: (3)
Feedback Score: 3 reviews
|
Quote:
Speed Academy on YouTube just swapped from a G25-660 to a G30-660 on their STi and saw great top end gains. Even with the larger exhaust wheel on The G30 and a larger A/R housing they didn't lose much low end on the EJ207 that is in the car.
__________________
|
|
08-21-2020, 11:05 PM | #51 | |
Zilvia Addict
Join Date: Feb 2014
Location: Arizona ٩( ᐛ )و Subaru Parts Consultant
Age: 29
Posts: 848
Trader Rating: (3)
Feedback Score: 3 reviews
|
Quote:
I'm really considering getting the Garrett turbine wheel speed sensor for my setup too after seeing AdamLZ explode one on his car. Considering the response people are seeing running these turbos, I could see it being important to keep an eye on turbine speed while tuning to ensure longevity. Would also be really cool to compare this data vs a G30 on an SR with a similar setup.
__________________
|
|
08-23-2020, 10:35 PM | #54 |
Zilvia Addict
Join Date: Oct 2013
Location: Denver Colorado
Age: 39
Posts: 613
Trader Rating: (4)
Feedback Score: 4 reviews
|
I saw that video as well. They lost a lot of response under the curve though almost 1000 rpm. I'd shoot for the g25-660 before the g30-660 to try to keep the response as best as possible.
__________________
Need aftermarket parts? PM or DM me competitive pricing! IG@S13Guille |
08-24-2020, 05:19 AM | #55 |
Post Whore!
|
I don't know if I'm down with the speed academy results. Not only did they lose 1000 rpm in spool, they really tried to play it down/off as no big deal on the street
Also they never discuss boost tip in/recovery at all Sorry, I'm just not buying what speed academy is selling and disappointed in the test/results if they really were focused on response. Even Pete at one point was like "yeah it falls out of boost between shift but hey its cool....." |
08-24-2020, 07:05 AM | #56 | |||
Zilvia.net Advertiser
Join Date: Nov 2005
Location: Michigan
Age: 36
Posts: 5,574
Trader Rating: (16)
Feedback Score: 16 reviews
|
Quote:
Quote:
Quote:
To put it in perspective, I have personally seen a G25-660 in a .92 housing make 505whp on E85 on an Evo X. AdamLZ's SR20 made just shy of 500whp on the 550 with mild cams! The EJ just doesn't make power. I did think it was funny how they were trying emphasize how much faster it "feels"...well yeah, it makes 100 more whp... and how they said that the spool really wasn't noticeable or even better on the street... like naw guys, you just have a goofy setup haha. As a side note, the G25-660 has a turbine to compressor diameter difference of 13mm. That's pretty significant on such a small turbo, and kind of fits Garrett's classic mistake of "big compressor, little turbine" in the name of "response". This usually affects transient response the most, and I bet if you put the two turbos back to back on the same engine, the 660 would be less than impressive in it's power gain/response loss. I'm not claiming that I'm some turbo knowledge god, but I nerd out on this shit and I've seen a ton of different turbo setups. These are my educated theories.
__________________
Build: http://zilvia.net/f/showthread.php?t=643065 Friends don't let friends buy knock-offs. |
|||
08-24-2020, 09:15 AM | #57 |
Zilvia Addict
Join Date: Oct 2013
Location: Denver Colorado
Age: 39
Posts: 613
Trader Rating: (4)
Feedback Score: 4 reviews
|
What I really want to see is a g25-550/g25-660 with some jwt s4hl cams on a det full tilt. Just so we can actually know what exactly were looking at for peak det performance without a vvl upgrade.
__________________
Need aftermarket parts? PM or DM me competitive pricing! IG@S13Guille |
08-24-2020, 09:20 AM | #58 |
Post Whore!
|
Poorman you pretty much sum up what I was thinking.
Garret, for years, have had an outdated turbine wheel. Shoot, the old outgoing wheels were coming along on 40+ years old and all they did was address the compressor wheel. Sweet, I just squeezed 100WHP more of heat at the same boost level, with none of the benefits of a more efficient turbine wheel. That causes all sorts of imbalance issue......more evident in the shitty tip in and boost recovery...the shit that actually matters on the street and track There is a reason manufacturers do not give out turbine wheel maps. Because that is where is magic is and Garrett has paid little attention for the aftermarket as they had little competition a decade ago. That has changed drastically..... The speed Academy results are........not something I would hang my hat on. The EJ series of engines have a really shitty flowing head, long runners to the turbo and overall, is not a good design. The new FA20 is much improved. Now, I am not shitting on the new G series. I am shitting on the Speed Academy mischaracterization of the results. |
08-24-2020, 09:21 AM | #59 |
Post Whore!
|
Stick with the G25-550, a good flowing head and go break some hearts. I would not be stepping up to the G30-660 unless I have a VET, B series v btec or a K series head in terms of flow if I want a useful rev range
|
08-24-2020, 09:33 AM | #60 |
Zilvia Addict
Join Date: Oct 2013
Location: Denver Colorado
Age: 39
Posts: 613
Trader Rating: (4)
Feedback Score: 4 reviews
|
I'm waiting for driftcrash's channel on YT to post his g25-660 Dyno sheet. So I can compare how much laggyer it is than a g25-550. I just want to see how much later the power comes on.
__________________
Need aftermarket parts? PM or DM me competitive pricing! IG@S13Guille |
Bookmarks |
|
|