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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars |
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08-26-2014, 10:30 AM | #1 |
Zilvia Junkie
Join Date: Nov 2004
Location: LA,CA & Windsor, ON
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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/ Last edited by Pstl_pete; 10-20-2014 at 01:46 PM.. |
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08-26-2014, 11:51 AM | #2 |
Post Whore!
Join Date: Sep 2004
Location: Independence, Ore.
Age: 39
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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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08-26-2014, 06:09 PM | #4 |
Post Whore!
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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. |
08-26-2014, 08:45 PM | #5 |
Post Whore!
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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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08-26-2014, 10:57 PM | #6 |
Post Whore!
Join Date: Sep 2004
Location: Independence, Ore.
Age: 39
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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. |
08-27-2014, 12:53 AM | #8 |
Post Whore!
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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...
Last edited by az_240; 08-27-2014 at 04:15 AM.. |
08-27-2014, 06:32 AM | #9 |
Post Whore!
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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. |
08-27-2014, 07:42 PM | #10 |
Zilvia Junkie
Join Date: Nov 2004
Location: LA,CA & Windsor, ON
Posts: 443
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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. |
08-27-2014, 07:46 PM | #11 |
Zilvia Junkie
Join Date: Nov 2004
Location: LA,CA & Windsor, ON
Posts: 443
Trader Rating: (4)
Feedback Score: 4 reviews
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Oh and I also just finished the exhaust setup for the car if any of you are interested.
http://youtu.be/AyNDQUXYX2c |
08-28-2014, 02:41 AM | #16 |
Post Whore!
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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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08-30-2014, 11:26 AM | #18 |
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 Last edited by Zolvovo; 08-30-2014 at 11:59 AM.. |
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08-30-2014, 01:52 PM | #21 |
Zilvia FREAK!
Join Date: Feb 2004
Location: Houston TX
Age: 41
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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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08-30-2014, 04:02 PM | #22 |
Zilvia FREAK!
Join Date: Jun 2010
Location: Toronto, ON
Age: 36
Posts: 1,182
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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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09-08-2014, 02:20 PM | #26 |
Zilvia Junkie
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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.
-Juan
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email: [email protected] Scott's Personal Website/Blog: http://www.scottandkerryann.com |
10-20-2014, 12:22 PM | #27 |
Zilvia Junkie
Join Date: Nov 2004
Location: LA,CA & Windsor, ON
Posts: 443
Trader Rating: (4)
Feedback Score: 4 reviews
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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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