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12-07-2011, 03:47 PM | #376 |
Scooby Specialist
Member#: 35076
Join Date: Apr 2003
Chapter/Region:
TXIC
Location: Austin/Round Rock
Vehicle:2004 507whp Wagon Silver |
I'm looking to switch out of the GTX3076R w/ .82 to the GTX3576R w/ .63 in hopes that I'll see some better flow from 24-30psi and better low end response. Right now the turbo appears to be out of breathe at around 28psi and 510-525whp. I'm also curious how the response on the new turbine will be in both .63 and .82 configs.
I had the car back on the dyno last week in hopes to see how the turbo would perform in colder weather at 30psi vs warmer weather at 28psi and was a bit disappointed.
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12-07-2011, 03:56 PM | #377 |
Former Vendor
Member#: 178047
Join Date: Apr 2008
Chapter/Region:
SWIC
Location: AZ
Vehicle:02 WRX STI Spec C Black |
Something is wrong. I just tuned a GTX 30R at 30 psi and its full on at 3600 to 3700 rpm.
The .63 on the 35r is a horrible idea. That turbo requires the larger .82 full high power/boost. The turbo you are looking for is the new GTX 30R with the GT35R hotside. It was released at Sema. C |
12-07-2011, 03:59 PM | #378 |
Scooby Specialist
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Join Date: Apr 2003
Chapter/Region:
TXIC
Location: Austin/Round Rock
Vehicle:2004 507whp Wagon Silver |
Clark - That's the turbo I was looking at replacing this one with. I'm also on stock TGV's and Stock Exh manifolds with unported 2.0L heads. What configuration was the GTX30 you had full boost at 3600?
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12-07-2011, 04:01 PM | #379 |
Former Vendor
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Join Date: Apr 2008
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stock 2.5 heads with a sleeved motor/pistons/rods. You need to get the heads cut. You are leaving ALOT on the table.
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12-07-2011, 04:08 PM | #380 |
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Vehicle:2004 507whp Wagon Silver |
I figured as much, if I ever pull the heads off again I'll likely replace them with 2.5L heads and be done with it. So much for chamber matching and a bowl blend being close to 2.5L flow lol
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12-07-2011, 04:24 PM | #381 |
Former Vendor
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The 2.0 head/2.5 motor is in my opinion the worst combination you could have. I would rather have a 2.0. I have never tuned one I liked and that includes my own. You will get some telling you they made XXX and there is no problem ect. In reality, they just do not realize what they are missing.
C |
12-07-2011, 04:55 PM | #382 |
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Vehicle:2000 Integra GSR 13.5:1 GT30R 597hp |
Turboge, Im really impressed you are able to maintain 30psi to redline. Are you jacking up the ebc duty cycle with rpm?
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12-07-2011, 06:20 PM | #383 |
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Not at all, I'm using a .8bar spring in the WG and only running around 40% duty cycle flat to hit 30psi. This is on a grimmspeed EBCS with 1/4" nipples and vacuum lines.
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09-29-2012, 10:23 AM | #384 |
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Well, that's pretty good news for me. Is that an .82 hotside on the GTX3071? I am currently working on a GTX3071 .63 build w/ rotated intake mani/v-mount --- shooting for super fast spool. I know it will die off later on in the power band but I won't be in that region for too long. I can't wait to see how quick she spools
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11-09-2012, 06:59 PM | #385 |
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Vehicle:30r E85 sti 450+whp kb'izzle |
looking for a comparison between the gt3076 .82 vs the gtx3576 .82, vs gtx3076 .82
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11-14-2012, 02:55 AM | #386 |
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Question to Jeff
I understand that gtx3076 .82 spool quicker than gtx3582 .63 and made same power up to 30psi but will the gtx3582 .63 perform better ( than gtx3076 .82 ) on - bigger engines - up to 35psi - rev limiter 7000 approx thanks in advance |
11-14-2012, 10:12 AM | #387 |
Former Vendor
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.63 is way to small for any of the turbos for the 2.5 motor. The information is right on Garrets website for all to see. Anyone using the .63 is leaving serious power on the table.
C |
11-15-2012, 09:04 AM | #388 | |
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Quote:
Most of the tuners also don't recommend .63 but why Garrets keep making them? for what cars ( engine cc ) ? leaving serious power on the table? I thought we are talking about 30-40hp on top ( .63 vs .82 ) |
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11-15-2012, 10:40 AM | #389 |
Former Vendor
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They make the .63 housing for lower flowing engines. The .63 is listed for 1.5 to 2.0 ltr engines. Or if you had two turbos on a V6 or V8 engine, You would want both turbos to have the small 63 housings.
C |
11-15-2012, 11:45 AM | #390 | |
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Quote:
Why twin .63 works better than twin .82 on V6 and V8?? |
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11-15-2012, 11:54 AM | #391 |
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A dissertation on turbine flow and dynamics is out of the scope of this perrin thread. I suggest you go to turbobygarrett.com and read the Turbo 101 information to get started. You can learn alot on that one website.
C |
11-15-2012, 03:03 PM | #392 |
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Thanks for help Clark!
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11-15-2012, 11:06 PM | #393 |
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11-16-2012, 07:01 AM | #394 |
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01-17-2013, 12:08 PM | #395 |
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Last edited by slowgenius; 01-17-2013 at 08:18 PM. |
02-20-2013, 01:39 PM | #396 |
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also want more info, all I could find was this :
in this thread on iwsti, page 14, but whole thread is about it, not sure of mods, fuel, or anything else, he has a few low boost plot above this one, pg 14 http://www.iwsti.com/forums/2-5-lite...stions-14.html I would also like more info, not sure if its wrth swapping out my basically brand new 30r .82, for this, Id swap to v band on the down and uppipes to help the seal/ spool be as good as possible, & my block is now built for it, along with headwork cams and all I prob wont see many good gains with them on my 30r, 1700+ is alot without others being the guinea pig first |
02-20-2013, 06:40 PM | #397 | |
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Quote:
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02-20-2013, 07:14 PM | #398 |
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My prediction is 35r performance. 35r boost threshold and 35r power. The compressor maps look similar basically the same although the gtx30r wheel has to spin faster to produce the same results because it's smaller. So it may be that it actually lags slightly more on the 35r turbine than a 35r compressor would. Personally I'm going to run an HTA 3582 because they seem to have lower boost threshold than a normal 35r and make the same power.
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05-15-2013, 04:45 AM | #399 | |
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Vehicle:2004 STI Gray |
Quote:
there's an evom comparo that shows the 3576 to spool faster than the gtx3076 which doesn't quite make sense since the 3076 has the smaller turbine wheel. I would love to see an actual Subaru comparison. I think the performance gain would be greater on our cars though as we typically benefit from the larger turbines. Just a few thoughts. I feel the 71mm wheel is a better match for 60mm turbine for our cars than the new 76mm wheel is. I wonder if the 3576 is the same. |
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05-15-2013, 10:25 AM | #400 | |
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Quote:
http://www.motoiq.com/magazine_artic...p-details.aspx |
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