GT2871 USERS. SR motor - Page 29 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

slider2828 · 05-14-2009, 04:20 PM

ECU tune I meant, is it the same? Cause man changing the ignition map really changes a lot of things.

OBEEWON · 05-14-2009, 04:54 PM

Quote:

Originally Posted by slider2828

Yeah you need a 6 cylinder.... Was tuning my friends 2JZ... its so smooth on a T78 compared to our 4 bangers that sound like rattling a tin can with a rock in it....

Yeah, I like driving my SC so much more even though its slow as nuts. I can't wait to boost it.

fromxtor · 05-14-2009, 05:44 PM

Quote:

I bought the GT3071R from phoenix turbo. It was a bolt on for sr20, so it's
a T2 flange. Internally gated (WG actuator not included). .86A/R if I
remember correctly and was rated at 550HP at 35lbs?

Here's the info OB.

OBEEWON · 05-14-2009, 06:14 PM

Quote:

Originally Posted by fromxtor

Here's the info OB.

good look. Sheesh 35 psi.

fromxtor · 05-14-2009, 06:26 PM

He bought the turbo years ago, might not be exact info.

http://www.phoenixturbo.com/

fullthrottle · 05-18-2009, 02:09 PM

Very good info. I now have a very good direction to go in with trying to hit 400whp. Took me damn near 3 days to read fully though haha.

ak240sx · 05-19-2009, 11:42 PM

Quote:

Originally Posted by fullthrottle

Very good info. I now have a very good direction to go in with trying to hit 400whp. Took me damn near 3 days to read fully though haha.

I agree. This thread is full of great information. I've definately gotten a few ideas for things to try when I buy my .64. Thank you everyone for your contributions.

deukalionS14 · 05-25-2009, 12:12 PM

hey guys i went to Steveshadows to have him tune my car but i had problems with the power FC..we chose to run the car on the dyno with the JWT tune n i had MASSIVE knockage (lol made that up) @ 15psi. so we lowered it to 11.5 and made 315whp on a dyno dynamics dyno...WTF?! what is 18psi with his tune going to net me?! we shall see once i get shit sorted out!!
!
The timing was a little off and he adjusted it accordingly. I cant wait to get my hands on a power fc that will work and see the magic!!!! +1 for steve!! after he put played with it 11psi felt stronger than 15psi muahaha

deukalionS14 · 05-29-2009, 09:10 PM

i found out the issue and I'm going back to Steveshadows this Sunday for my tune for sure. im shooting for 350+ on a dyno dynamics dynometer. wish me luck guys!

GabeS14 · 05-30-2009, 03:29 AM

Quote:

Originally Posted by deukalionS14

i found out the issue and I'm going back to Steveshadows this Sunday for my tune for sure. im shooting for 350+ on a dyno dynamics dynometer. wish me luck guys!

yea timing being off will cause mad knock.. if you dont get minimum 360hp with a 2871r its because your turbo must be gay!

thats the average with a basic tune..
a really good tune will throw down near 380hp+++

deukalionS14 · 05-30-2009, 09:55 AM

Quote:

Originally Posted by Gabe╚╗14

yea timing being off will cause mad knock.. if you dont get minimum 360hp with a 2871r its because your turbo must be gay!

thats the average with a basic tune..
a really good tune will throw down near 380hp+++

yeah im confident that steve will do a great job with the tune!

im going to a full write up of what has been going on with this car since i've been back.

i'll post up the sheet soon!!

Ralliart4 · 05-30-2009, 12:07 PM

Very good info guys

HPballer76 · 06-04-2009, 12:30 PM

hey guys im going to look at this turbo today. the guy says its a gt2871r but it looks like an s15 turbo to me. can anyone tell me for sure which it is? here is a pic

slider2828 · 06-04-2009, 01:32 PM

I think on the there turbine housing where the exhaust goes through, it should say .86 or .64 look for those markings.

HPballer76 · 06-04-2009, 02:19 PM

alright thanks will do.

anyone else?

sbanzer123 · 06-04-2009, 02:25 PM

if its a gt2871r it is the "gtrs style"

HPballer76 · 06-04-2009, 02:29 PM

^^ yea thats what he said it was. is there any easy way to tell it apart from an s15 turbo?

slider2828 · 06-04-2009, 03:15 PM

Not really, but look on phase2motortrends site or frsport and compare the pictures lol....

HPballer76 · 06-04-2009, 06:56 PM

^^thats where i came to the conclusin that its an s15 turbo.. the difference i saw is that after it says m24 the s15 has 1-1 and the gt2871r has 1-2. are they all like that or is it possible for the gt2871r to have the 1-1?

deukalionS14 · 06-06-2009, 09:43 PM

Has any of you ever heard of a situation where you raise the boost but dont see any measurbale increase in power? i know these turbos are good for up to 21psi but after 13psi there was no increase.

I'm currently trying to find a boost leak some where. perhaps i should find someone to do a leak down test?

slider2828 · 06-06-2009, 11:37 PM

^^^ If you are talking about s15 turbo's after about 13 -15 psi is pretty much efficiency range, anything over is minimal and hurting the turbo period.

On a gt2871R, I have definitely measureable different when settings are changed. Its your tune if it doesn't change. Contact steveshadows and I promise you at 17psi you will shit in your pants.

deukalionS14 · 06-07-2009, 12:44 AM

yeah its on a 2871r. steve tuned the car and i must say it's WAY better than the JWT tune. the power band is smoother and it's crazy how it might not "feel" as "fast" it is in fact faster.

He had the car putting out 326whp on a DD dyno at 12psi but for some reason after he would raise the boost no power gains were seen. this is something that we were all stumped about and he has some ides on what i could be and is helping me figure it out.

i just want to get some opinions of what you guys might think it could be. i'm sure its mechanical and not the tune...i've been searching my ass off and cant find anything!

drftmark · 06-07-2009, 12:48 AM

mechanical timing being off? use a timing light?

deukalionS14 · 06-07-2009, 01:09 AM

yeah he checked and double checked. he said its right where it needs to be.

the fact that the motor has been rebuilt and the compression is slightly higher due to a slight shave and stock size HG wouldnt cause this would it?!

BiG MiKE86 · 06-07-2009, 07:28 AM

Quote:

Originally Posted by deukalionS14

yeah its on a 2871r. steve tuned the car and i must say it's WAY better than the JWT tune. the power band is smoother and it's crazy how it might not "feel" as "fast" it is in fact faster.

He had the car putting out 326whp on a DD dyno at 12psi but for some reason after he would raise the boost no power gains were seen. this is something that we were all stumped about and he has some ides on what i could be and is helping me figure it out.

i just want to get some opinions of what you guys might think it could be. i'm sure its mechanical and not the tune...i've been searching my ass off and cant find anything!

Hey I am having the same problem but its more like 14ish psi - there is no change from 14-21 psi in power for me and we cant figure it out either. Please post your findings

deukalionS14 · 06-07-2009, 09:17 AM

^^ cool im not the only one!! lol jk.

well yesterday after looking over things i found that the bolts on the turbine housing group had backed out...i found 2 so far but i could only fix one because i need a longer wrench. i dont really want to pull the manifold off but if i need to then so be it.

does anyone know if this makes a difference? like gasses escape at high boost or something?

OBEEWON · 06-07-2009, 09:45 AM

Mine does that too. I ran 40psi and made 278whp

deukalionS14 · 06-07-2009, 09:57 AM

we need to figure this out! someone help! lol

slider2828 · 06-07-2009, 11:05 AM

Really? I definitely feel a difference between 14 and 17 becase I run a profec e01, mine can be switched on the fly or automatically based on speed, its definitely noticeable. You guys are forgetting CAMS and also Intake chambers would make a huge difference. CAMS can only make power in a certain range, CAMS can only do so much for power because there IS a sweet spot for CAMS for power range. Same with the stock intake manifolds and runners. YOu can easily max out the chamber s and just can't flow any more.... I believe this is the biggest affect....

deukalionS14 · 06-07-2009, 04:51 PM

hmmm...well im running HKS 256/264's and the rest is pretty much stock...this is killing me! lol i should be able to put down way more according to what everyone is putting down. could the fact that it doesnt show an increase in power as i raise the PSI be a vacuum or boost leak that doesnt show until under such pressure?

also, does everyone elses FPR make a sound? its almost like i can hear air leaking or something but cant find ANYTHING

05-14-2009, 04:20 PM	#841
slider2828 Post Whore! Join Date: Oct 2004 Location: San Francisco, CA Posts: 6,040 Trader Rating: (13) Feedback Score: 13 reviews	ECU tune I meant, is it the same? Cause man changing the ignition map really changes a lot of things. __________________ Turn and Burn!

05-14-2009, 06:26 PM	#845
fromxtor Post Whore! Join Date: Aug 2005 Location: NC Age: 44 Posts: 3,012 Trader Rating: (23) Feedback Score: 23 reviews	He bought the turbo years ago, might not be exact info. http://www.phoenixturbo.com/ __________________ Seller feedback>>http://www.zilvia.net/f/showthread.p...light=fromxtor Last edited by fromxtor; 05-14-2009 at 06:50 PM..

05-25-2009, 12:12 PM	#848
deukalionS14 Zilvia Junkie Join Date: Dec 2007 Location: SoCal Age: 39 Posts: 326 Trader Rating: (9) Feedback Score: 9 reviews	hey guys i went to Steveshadows to have him tune my car but i had problems with the power FC..we chose to run the car on the dyno with the JWT tune n i had MASSIVE knockage (lol made that up) @ 15psi. so we lowered it to 11.5 and made 315whp on a dyno dynamics dyno...WTF?! what is 18psi with his tune going to net me?! we shall see once i get shit sorted out!! ! The timing was a little off and he adjusted it accordingly. I cant wait to get my hands on a power fc that will work and see the magic!!!! +1 for steve!! after he put played with it 11psi felt stronger than 15psi muahaha __________________ want to be in the 500whp club by the end of next year!!! Last edited by deukalionS14; 05-25-2009 at 10:30 PM..

05-29-2009, 09:10 PM	#849
deukalionS14 Zilvia Junkie Join Date: Dec 2007 Location: SoCal Age: 39 Posts: 326 Trader Rating: (9) Feedback Score: 9 reviews	i found out the issue and I'm going back to Steveshadows this Sunday for my tune for sure. im shooting for 350+ on a dyno dynamics dynometer. wish me luck guys! __________________ want to be in the 500whp club by the end of next year!!!

06-04-2009, 12:30 PM	#853
HPballer76 Zilvia Junkie Join Date: May 2008 Location: Greensboro N.C. Age: 33 Posts: 452 Trader Rating: (9) Feedback Score: 9 reviews	hey guys im going to look at this turbo today. the guy says its a gt2871r but it looks like an s15 turbo to me. can anyone tell me for sure which it is? here is a pic __________________

05-18-2009, 02:09 PM	#846
fullthrottle Zilvia Addict Join Date: Apr 2009 Location: Saint Louis, MO Age: 38 Posts: 661 Trader Rating: (13) Feedback Score: 13 reviews	Very good info. I now have a very good direction to go in with trying to hit 400whp. Took me damn near 3 days to read fully though haha.

05-30-2009, 12:07 PM	#852
Ralliart4 Leaky Injector Join Date: Nov 2007 Location: Panama City Fl, Kingston Jamaica Age: 45 Posts: 83 Trader Rating: (2) Feedback Score: 2 reviews	Very good info guys

06-04-2009, 01:32 PM	#854
slider2828 Post Whore! Join Date: Oct 2004 Location: San Francisco, CA Posts: 6,040 Trader Rating: (13) Feedback Score: 13 reviews	I think on the there turbine housing where the exhaust goes through, it should say .86 or .64 look for those markings. __________________ Turn and Burn!

06-04-2009, 02:19 PM	#855
HPballer76 Zilvia Junkie Join Date: May 2008 Location: Greensboro N.C. Age: 33 Posts: 452 Trader Rating: (9) Feedback Score: 9 reviews	alright thanks will do. anyone else? __________________

06-04-2009, 02:25 PM	#856
sbanzer123 Zilvia Junkie Join Date: Aug 2006 Location: Buffalo, NY Age: 36 Posts: 534 Trader Rating: (6) Feedback Score: 6 reviews	if its a gt2871r it is the "gtrs style" __________________

06-04-2009, 02:29 PM	#857
HPballer76 Zilvia Junkie Join Date: May 2008 Location: Greensboro N.C. Age: 33 Posts: 452 Trader Rating: (9) Feedback Score: 9 reviews	^^ yea thats what he said it was. is there any easy way to tell it apart from an s15 turbo? __________________

06-04-2009, 03:15 PM	#858
slider2828 Post Whore! Join Date: Oct 2004 Location: San Francisco, CA Posts: 6,040 Trader Rating: (13) Feedback Score: 13 reviews	Not really, but look on phase2motortrends site or frsport and compare the pictures lol.... __________________ Turn and Burn!

06-04-2009, 06:56 PM	#859
HPballer76 Zilvia Junkie Join Date: May 2008 Location: Greensboro N.C. Age: 33 Posts: 452 Trader Rating: (9) Feedback Score: 9 reviews	^^thats where i came to the conclusin that its an s15 turbo.. the difference i saw is that after it says m24 the s15 has 1-1 and the gt2871r has 1-2. are they all like that or is it possible for the gt2871r to have the 1-1? __________________

06-06-2009, 09:43 PM	#860
deukalionS14 Zilvia Junkie Join Date: Dec 2007 Location: SoCal Age: 39 Posts: 326 Trader Rating: (9) Feedback Score: 9 reviews	Has any of you ever heard of a situation where you raise the boost but dont see any measurbale increase in power? i know these turbos are good for up to 21psi but after 13psi there was no increase. I'm currently trying to find a boost leak some where. perhaps i should find someone to do a leak down test? __________________ want to be in the 500whp club by the end of next year!!!

06-06-2009, 11:37 PM	#861
slider2828 Post Whore! Join Date: Oct 2004 Location: San Francisco, CA Posts: 6,040 Trader Rating: (13) Feedback Score: 13 reviews	^^^ If you are talking about s15 turbo's after about 13 -15 psi is pretty much efficiency range, anything over is minimal and hurting the turbo period. On a gt2871R, I have definitely measureable different when settings are changed. Its your tune if it doesn't change. Contact steveshadows and I promise you at 17psi you will shit in your pants. __________________ Turn and Burn!

06-07-2009, 12:44 AM	#862
deukalionS14 Zilvia Junkie Join Date: Dec 2007 Location: SoCal Age: 39 Posts: 326 Trader Rating: (9) Feedback Score: 9 reviews	yeah its on a 2871r. steve tuned the car and i must say it's WAY better than the JWT tune. the power band is smoother and it's crazy how it might not "feel" as "fast" it is in fact faster. He had the car putting out 326whp on a DD dyno at 12psi but for some reason after he would raise the boost no power gains were seen. this is something that we were all stumped about and he has some ides on what i could be and is helping me figure it out. i just want to get some opinions of what you guys might think it could be. i'm sure its mechanical and not the tune...i've been searching my ass off and cant find anything! __________________ want to be in the 500whp club by the end of next year!!!

06-07-2009, 12:48 AM	#863
drftmark Zilvia Junkie Join Date: Nov 2005 Location: tx Posts: 524 Trader Rating: (5) Feedback Score: 5 reviews	mechanical timing being off? use a timing light?

06-07-2009, 01:09 AM	#864
deukalionS14 Zilvia Junkie Join Date: Dec 2007 Location: SoCal Age: 39 Posts: 326 Trader Rating: (9) Feedback Score: 9 reviews	yeah he checked and double checked. he said its right where it needs to be. the fact that the motor has been rebuilt and the compression is slightly higher due to a slight shave and stock size HG wouldnt cause this would it?! __________________ want to be in the 500whp club by the end of next year!!!

06-07-2009, 09:17 AM	#866
deukalionS14 Zilvia Junkie Join Date: Dec 2007 Location: SoCal Age: 39 Posts: 326 Trader Rating: (9) Feedback Score: 9 reviews	^^ cool im not the only one!! lol jk. well yesterday after looking over things i found that the bolts on the turbine housing group had backed out...i found 2 so far but i could only fix one because i need a longer wrench. i dont really want to pull the manifold off but if i need to then so be it. does anyone know if this makes a difference? like gasses escape at high boost or something? __________________ want to be in the 500whp club by the end of next year!!!

06-07-2009, 09:45 AM	#867
OBEEWON Post Whore! Join Date: Feb 2006 Location: Hightened State of Emergency Posts: 6,053 Trader Rating: (9) Feedback Score: 9 reviews	Mine does that too. I ran 40psi and made 278whp __________________

06-07-2009, 09:57 AM	#868
deukalionS14 Zilvia Junkie Join Date: Dec 2007 Location: SoCal Age: 39 Posts: 326 Trader Rating: (9) Feedback Score: 9 reviews	we need to figure this out! someone help! lol __________________ want to be in the 500whp club by the end of next year!!!

06-07-2009, 11:05 AM	#869
slider2828 Post Whore! Join Date: Oct 2004 Location: San Francisco, CA Posts: 6,040 Trader Rating: (13) Feedback Score: 13 reviews	Really? I definitely feel a difference between 14 and 17 becase I run a profec e01, mine can be switched on the fly or automatically based on speed, its definitely noticeable. You guys are forgetting CAMS and also Intake chambers would make a huge difference. CAMS can only make power in a certain range, CAMS can only do so much for power because there IS a sweet spot for CAMS for power range. Same with the stock intake manifolds and runners. YOu can easily max out the chamber s and just can't flow any more.... I believe this is the biggest affect.... __________________ Turn and Burn!

06-07-2009, 04:51 PM	#870
deukalionS14 Zilvia Junkie Join Date: Dec 2007 Location: SoCal Age: 39 Posts: 326 Trader Rating: (9) Feedback Score: 9 reviews	hmmm...well im running HKS 256/264's and the rest is pretty much stock...this is killing me! lol i should be able to put down way more according to what everyone is putting down. could the fact that it doesnt show an increase in power as i raise the PSI be a vacuum or boost leak that doesnt show until under such pressure? also, does everyone elses FPR make a sound? its almost like i can hear air leaking or something but cant find ANYTHING __________________ want to be in the 500whp club by the end of next year!!!