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Old 08-26-2014, 10:30 AM   #1
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Garrett GTX2863R SR Install and external gate setup - Now with Dyno results!

Finished this install up a while ago but I figured I'd post it up on here as well since some of you may be interested in it.

I am hoping to get it tune before the end of September (have another project taking precedence) but it'll be good to see how it compares with a 2871R turbo.


The biggest issue I ran into while installing the turbo is having to make a custom intake setup, not a big deal though.




Welded up some 3-inch piping I had laying around and had myself a decent intake.


Also had to add a quick 90 deg bend on the compressor side to mate it to the IC cold side piping.


The GTX2863R is internally gated but I wanted more precise boost control so I welded up the gate.


And added a provision for an external wastegate on the stock manifold.


Built this return tube with a bellows piece since I was told it would crack without it.


Went with a Comp-40 Turbosmart wastegate since its compact in size and Ive always had good success with their products.


And here's the final setup. Hoping that this will make a conservative 320-340whp at the wheels on pump gas and around 15psi. I love how I got to re-use all the stock heat shielding components. No heat issues here!

If you wanna see more detailed install pics and explanation you can check it out here: http://speed.academy/sr20det-s14-nis...2863r-upgrade/
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Old 08-26-2014, 11:51 AM   #2
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I like the wastegate recirc a lot. I ran my screamer piped for a while, and now it just has a flex section at the bottom and runs back into the downpipe towards the end. Your solution is much more elegant.
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Old 08-26-2014, 05:35 PM   #3
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looking to see how it will compare with a 2871 subd
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Old 08-26-2014, 06:09 PM   #4
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Very cool. Did you by chance use an electronic boost controller on the 2871r? I've been wondering how much better a setup like this (recirc EWG) is compared to using a quality internal wastegate and EBC.

Looking forward to seeing the results.
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Old 08-26-2014, 08:45 PM   #5
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Quote:
Originally Posted by az_240 View Post
Very cool. Did you by chance use an electronic boost controller on the 2871r? I've been wondering how much better a setup like this (recirc EWG) is compared to using a quality internal wastegate and EBC.

Looking forward to seeing the results.
No comparison really. You're trying to control exhaust gases flowing throw a "quarter" sized hole vs a 38 or 44mm hole on the ex. The external will offer better control almost all of time.
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Old 08-26-2014, 10:57 PM   #6
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I had the internal gate ported on my 2863 and am still running the internal gate.

I went from 2871 .64 to gtx2863 .64 and the gtx spools about 400-500rpm sooner. Still on stock cams. I was running 12-14psi gate with greddy profec on the 2871, now running 7psi gate with same EBC. I have the gain turned all the way up and it still doesn't spike (running 14psi) so I kind of want to go to the 12-14psi so I can set the gain right to edge of spike.
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Old 08-26-2014, 11:15 PM   #7
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Nicely done.
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Old 08-27-2014, 12:53 AM   #8
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Quote:
Originally Posted by jr_ss View Post
No comparison really. You're trying to control exhaust gases flowing throw a "quarter" sized hole vs a 38 or 44mm hole on the ex. The external will offer better control almost all of time.
Better control yes... but is it really worth the hassle for a build pushing 350whp or less (15-18psi)? You could also port the wg flapper hole a bit on the turbo and run a divorced elbow to help with boost issues...

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Old 08-27-2014, 06:32 AM   #9
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From what I have seen, adding an external gate also frees up some horsepower. On the smaller turbos (GT28R, etc), we were typically seeing 10-15 WHP just from going from an internal gate stock manifold, to adding a V-band and going external (one of the reasons Garrett added a "division" between the exhaust and the internal gate on the S15 turbos).

The inherent flow restriction in the smaller exhaust housing with the internal gate was what was deemed the issue.
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Old 08-27-2014, 07:42 PM   #10
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I've got an EMS Series 2 so my boost control is built into that and will be optimized for maximum response which is why I spent all the time building the external setup. I went with this turbo to have stock like response.

I do agree that the internal gated housing and the T28 flange inherently aren't ideal for flow but this will be an experiment to see how this all works. I really wanted to keep the stock manifold and heat shielding so I'm crossing my fingers all this time and effort is worth it.
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Old 08-27-2014, 07:46 PM   #11
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Oh and I also just finished the exhaust setup for the car if any of you are interested.

http://www.youtube.com/watch?v=AyNDQUXYX2c
http://youtu.be/AyNDQUXYX2c
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Old 08-27-2014, 09:20 PM   #12
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Nice video, can't wait to see how it all turns out.

Kinda at a crossroads with the IWG vs EWG (already have a pbm cobra downpipe made for IWG) which is why I ask.
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Old 08-27-2014, 09:26 PM   #13
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I have PBM cobras on both of my cars. For the 67 with external I just plumbed in the recirc towards the back.
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Old 08-27-2014, 10:39 PM   #14
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i was so happy that my motor was out of the car when i was installing the tomei oil pan. Lol
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Old 08-27-2014, 11:26 PM   #15
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haha you use one of my favorite welding gloves. To bad they discontinued them.
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Old 08-28-2014, 02:41 AM   #16
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Quote:
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I have PBM cobras on both of my cars. For the 67 with external I just plumbed in the recirc towards the back.
Yeah I remember you mentioned that in another thread but I'm worried it won't flow right with the divorced elbow/downpipe and would hate to chop/weld for the recirc. I think I'd go with a regular elbow and either buy or have someone fab up a downpipe with flex section if I went with the EWG.
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Old 08-30-2014, 10:47 AM   #17
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Stock sr with a external wg gtx2863r? I really wanna see this,
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Old 08-30-2014, 11:26 AM   #18
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google brought me here!
will be back to check your progress

bolted up my gtx2860 as is and having severe high rpm boost drop now
was told i need an ebc but nobody i know has to use an ebc

good info

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Old 08-30-2014, 12:49 PM   #19
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What kind of controller are you using now? Manual or none?
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Old 08-30-2014, 12:51 PM   #20
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manual and it spikes too
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Old 08-30-2014, 01:52 PM   #21
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Awesome and clean install, just got my car running about a month ago with gt2871r using tial 38mm on stock manifold. Feels awesome and boost is dead on at 19psi with no spikes. I think eventually i would like to swap out for a gtx2863 or 67 with e85.
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Old 08-30-2014, 04:02 PM   #22
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Quote:
Originally Posted by Zolvovo View Post
google brought me here!
will be back to check your progress

bolted up my gtx2860 as is and having severe high rpm boost drop now
was told i need an ebc but nobody i know has to use an ebc

good info
What engine? Perhaps your airflow requirements are simply greater than what your turbo can provide, resulting in the pressure ratio falling off at high RPM.
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Old 08-30-2014, 07:18 PM   #23
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SR with pulsar mani

yeah i think you're right might've blown it with the turbo choice

so anybody think an ebc is worth exploring or no?

(sorry op)
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Old 09-02-2014, 12:13 PM   #24
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So the top nipple on the waste gate just vents to the atmosphere?
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Old 09-08-2014, 12:48 PM   #25
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So the top nipple on the waste gate just vents to the atmosphere?
Yes, there are different ways to setup the external gate but I wont be pushing crazy amounts of boost so there's no need for the top nipple.
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Old 09-08-2014, 02:20 PM   #26
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very nice looking setup! we also run Garrett turbos on all of our shop cars. the GTX2863 should be a blast to drive. to take advantage of the GTX wheel you should give E85 a shot and push it to the higher boost levels if your engine allows.

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Old 10-20-2014, 12:22 PM   #27
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Alright, finally got the car on a dyno to see how well the GTX2863R performs. We ran into some nagging knock issues so 15psi is as high as it was run with the catalytic converter but it made 318whp and 286ft-lbs.


It spools so fast and power is incredibly linear! I'm loving this turbo setup Especially with the external wastegate, there's zero boost creep or surging.

The chart below has my old stock T28 graph for reference.


With a test pipe, boost jumped to 17psi and the setup made 333whp and 302ft-lbs so this turbo has the capability of making decent power at higher boost pressures.

Anyways, watch the video below for all the details: http://youtu.be/QjaK5n86IjY
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Old 10-20-2014, 12:34 PM   #28
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Was this on 91 octane?
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Old 10-20-2014, 01:10 PM   #29
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Are you controlling VCT with the AEM V2?
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Old 10-20-2014, 01:44 PM   #30
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Was this on 91 octane?
It over half 94 octane and the rest was 91 octane that was in the tank for 1 year.
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