GT2871R Users Advice

[shift_SRDETuser]

Hey guys--- I am upgrading some things on my s14 sr20det swap and am needing some advice on which turbo to use. I am going with a apexi power fc, some light to mild or maybe even stock cams since I like the vtc, using an apexi head gasket and arp headstuds for added insurance. Does anyone on this site use this setup and what kind of numbers can I expect. I am wanting to mildly tune this setup to 280-320 whp and would like to keep some sort of fuel economy with it.

How reliable will it be? I am really looking for people with this setup not looking for smart comments on what it would be but what it actually is.... i.e. kentucky slider et al.... thank you

[two40splease]

Disco potato or s15 turbo for you right in line with your power goals and better spool.

[blownSR2087]

i would go with the gt2876r that is the one i have an i love it i am pushin about 330 to the wheels @ 15psi

[S14toRPS13]

Like mentioned above, I'd go with a disco potato/GT28RS for 280-320 whp. Faster spool up. I was using a similar turbo, the HKS GT2530 and ran 270 whp on a mustang dyno. That would've probably equaled close to atleast 300 whp on dynojets. I've since upgraded to a GT2871R .64 but still pushing about same amount of hp until I can get some bigger cams and another tune. At this power level, the GT2871R .64 is too laggy compared to the GT2530. I wouldn't mind boosting 500 to 600 rpms later if I was pushing out more power, but at this power level, I liked the response of the GT2530 more. So, for those power levels around 280 to 320, get the GT28RS/Disco potato for better response. If you want more power with a slight bit more lag, then get 264/264 cams and the GT2871R .64. Also why do you want the power fc for a mild set up? An ecu tune by enthalpy, jwt, or emance would be a more reasonable choice. BTW, I was getting 28 mpg on the freeway with occasional spirited driving.

[shift_SRDETuser]

I got a good deal

Like mentioned above, I'd go with a disco potato/GT28RS for 280-320 whp. Faster spool up. I was using a similar turbo, the HKS GT2530 and ran 270 whp on a mustang dyno. That would've probably equaled close to atleast 300 whp on dynojets. I've since upgraded to a GT2871R .64 but still pushing about same amount of hp until I can get some bigger cams and another tune. At this power level, the GT2871R .64 is too laggy compared to the GT2530. I wouldn't mind boosting 500 to 600 rpms later if I was pushing out more power, but at this power level, I liked the response of the GT2530 more. So, for those power levels around 280 to 320, get the GT28RS/Disco potato for better response. If you want more power with a slight bit more lag, then get 264/264 cams and the GT2871R .64. Also why do you want the power fc for a mild set up? An ecu tune by enthalpy, jwt, or emance would be a more reasonable choice. BTW, I was getting 28 mpg on the freeway with occasional spirited driving.

got a good deal on the power commander --- I just do not know... I guess a gt2871r likes to be in the 350-400 whp range and feels laggy if you tune it to to 280 -320 -- it is a lot more efficient though and at 10 lbs should be around 300 whp. I have thought about some 256/264 cams since I have vtc and would like to keep that. The power fc does a lot more kewl stuff than others. no consult all monitoring and sensor checks can be done through the handheld....oh and for the price the gt2871r is only a couple of hundred dollars more than the gt28rs so I would probably get the s15 gt28r or gt2871r.

s14 to rps13 are your running a s13 blacktop/ redtop or s14 blacktop?
Modified by shift_SRDETuser at 7:33 PM 2/18/2009

[S14toRPS13]

s14 to rps13 are your running a s13 blacktop/ redtop or s14 blacktop?

If I got a good deal on a stand alone, I'd go for it too. My motorset's all mixed though. I'm running a S13 redtop head with a later S13 blacktop n/a bottom block, with s13 blacktop turbo internals and then matched up to a S14 transmission. So, I'm not sure what you would call that.

[shift_SRDETuser]

ok thanks that would be a franken-- nissan -- haha -- Need a clutch now as well since I am sure I will smoke the stock one fast....

[Stripes]

I'm running a S13 redtop head with a later S13 blacktop n/a bottom block, with s13 blacktop turbo internals and then matched up to a S14 transmission. So, I'm not sure what you would call that.

98' s13.4 redtop? hahaha, i dunno. All these people doing turbo upgrades is making me wanna do one.

[S14toRPS13]

98' s13.4 redtop? hahaha, i dunno. All these people doing turbo upgrades is making me wanna do one.

haha, Since it originally had a blacktop valve cover, most of the time I'll just say S13 blacktop to keep it simple.

It's that time of the year again. Income tax returns and the need for more power. It's like Christmas season for all the tuner shops and tuner retailers out there. I want my Tomei cams and a tune also, but I'm in Korea and my car is in WA

[idahotuner]

my gt2871 with 264 cams was no where near laggy.

and 10 psi got me 328 to the rear wheels. seems lieka reliable set up to me.

yes this is a sales pitch.

I have mine for sale. in perfect condition

[S14toRPS13]

my gt2871 with 264 cams was no where near laggy.

and 10 psi got me 328 to the rear wheels. seems lieka reliable set up to me.

yes this is a sales pitch.

I have mine for sale. in perfect condition

haha, I know the situation your in. The GT2871R .64 isn't a laggy turbo, but it lags more than a turbo like GT28RS or T28 and so on. If I was the OP, I'd build a mild set up with the GT2871R for now and slowly keep on upgrading, instead of settling for a set amount of hp. Afterall, is any of us ever really happy once we've reached our hp goals.

[idahotuner]

yes upgrading is allways a nice option to have.

but at the same time witha boost controler and a gt2871 i had 3 different settings i never got to use 400 on the streets. so it will be interesting to actually get 400 to the wheels in a more permament bases.

but 328 runing off the actuator was kick a** then get bored and i would turn it up to sixteen or if some one wanted to race. lol

[shift_SRDETuser]

your turbo is for sale? what are you selling?

[idahotuner]

selling a gt2871r .64

[shift_SRDETuser]

email sent is it the gt2871r with the sr20 housing?

[idahotuner]

yep. its is a dirrect replacement for the t25.

[CBGuamRealtor]

Just ordered my GT2871r...stock cams for now..just curious...why are u selling ur turbo?

last, what realistic HP and torque #'s do u think i can achieve with the GT2871r and stock cams?

thanks

[Justin35ll]

Yeah seriously. All this talk makes me want to upgrade my turbo too lol.Can I make a reliable around 300whp on a 2871r .64 with stock block but upgraded cams? Possible to run this at 15 - 16 psi occasionally? I was planning 10 - 12 normally though.

Do you guys do springs and retainers as well when you upgrade your cams

[S14toRPS13]

Yeah seriously. All this talk makes me want to upgrade my turbo too lol.Can I make a reliable around 300whp on a 2871r .64 with stock block but upgraded cams? Possible to run this at 15 - 16 psi occasionally? I was planning 10 - 12 normally though.

Do you guys do springs and retainers as well when you upgrade your cams

Yes, 300 whp with a GT2871R .64 as long as you have the supporting mods and a good tune is just as reliable as stock. 15-16 psi with supporting mods should be easy. I ran 21 psi with my GT2530 and the turbo gave out. My motor still runs just like a champ, even now with the GT2871R.

Yes, you should do the springs and retainers when upgrading your cams. Some say you don't need to, but I've seen what valve floating does to your valve and piston.

[idahotuner]

Just ordered my GT2871r...stock cams for now..just curious...why are u selling ur turbo?

last, what realistic HP and torque #'s do u think i can achieve with the GT2871r and stock cams?

thanks

stock cams would be able to do 300 to the wheels. wit hthis turbo. i made 371 at 16 psi and 264 cams.

[shift_SRDETuser]

stock cams would be able to do 300 to the wheels. wit hthis turbo. i made 371 at 16 psi and 264 cams.

I am hoping for more than that? I am sticking with the stock cams cause I like VTC. Hoping for 320 ish on low boost 10 lbs and around 350-360 on high boost 15-16 lbs.....

[idahotuner]

yeah i did 328 on 10 psi with cams and stuff

[shift_SRDETuser]

yeah i did 328 on 10 psi with cams and stuff

cams and stuff? you were running an s13 motor? I have an s14 motor which should make 10 percent more power for a given boost/ rpm level? This would equate to 300 whp to 330 whp on 15 lbs right or wrong?

[codyace]

Yes, you should do the springs and retainers when upgrading your cams. Some say you don't need to, but I've seen what valve floating does to your valve and piston.

You don't need to change anything if running a JimWolf S series (s3 or s4 for example) cam. I trust their research and development more than some random assumption.

haha, I know the situation your in. The GT2871R .64 isn't a laggy turbo, but it lags more than a turbo like GT28RS or T28 and so on. If I was the OP, I'd build a mild set up with the GT2871R for now and slowly keep on upgrading, instead of settling for a set amount of hp. Afterall, is any of us ever really happy once we've reached our hp goals.

Wrong



There is my dyno overlaid a 360ish whp 28RS Sentra. Over RPM they spool evenly, and if you put those graphs over time, my 2871r .64 240 spools faster

I love the spud, but the 2871r .64 is the better turbo.

[S14toRPS13]

You don't need to change anything if running a JimWolf S series (s3 or s4 for example) cam. I trust their research and development more than some random assumption.

Wrong



There is my dyno overlaid a 360ish whp 28RS Sentra. Over RPM they spool evenly, and if you put those graphs over time, my 2871r .64 240 spools faster

I love the spud, but the 2871r .64 is the better turbo.

How are you managing to get that spool up? I don't have 3 different dynos to compare, but just by sitting in the seat and looking at the boost gauge. My T25 reached full boost by 3000 rpm, my HKS GT2530 reached full boost at about 3500 rpm and my GT2871R .64 reaches full boost just before 4000 rpm. I'm using the stock manifold, so I'm not sure if that'd be a big issue.

[codyace]

How are you managing to get that spool up? I don't have 3 different dynos to compare, but just by sitting in the seat and looking at the boost gauge. My T25 reached full boost by 3000 rpm, my HKS GT2530 reached full boost at about 3500 rpm and my GT2871R .64 reaches full boost just before 4000 rpm. I'm using the stock manifold, so I'm not sure if that'd be a big issue.

On the street, the turbo spools even faster (with the load)...that's the downfall of dynojets, is that they don't load turbos well IMO.

I have a stock exhaust manifold, extrude honed and swain coated, an extrude honed housing, s3 cams, and a greddy intake manifold. There are times with some 5th gear crusing that I can roll into it and hit 20 psi at 3800ish rpm....it's a real treat!

I'm a response guy, and love road racing...so nothing is worse to me than waiting for a turbo to come to life! However I've drag raced the thing twice now (once on street tires, and once on my buddies mustang wheels) and my best to date is an 11.65@ 120. I had a bad launch (high 1.8's) so I think with more practice and a better launch, I could easily see closer to 11.0's/11.1's with the car Full weight S14 at that.

I love this turbo and really get a kick out of people that suggest anything else other than this thing for a 300-400 whp car. Dont' get me wrong, I love the spud, and think its' awesome on a fwd sentra, but on an s chassis car, where you can fit a real tire...there is no reason not to go with it...the top end alone is worth it!

[idahotuner]

dude i checked into extrude and hone its freaking expensive. lol i was thinking about having it done to my head before i had my valve job done.

[RedlineBoost]

Sorry to hijack this thread, Hit me up on aim, Im interested in your stuff for sale.

[S14toRPS13]

dude i checked into extrude and hone its freaking expensive. lol i was thinking about having it done to my head before i had my valve job done.

That's right. I remember reading up on Codyace's 400whp thread. I checked into extrude honing and swain coating back then too. It's really more than what I want to spend. You got to pay to play I guess. It sure shows how much of a difference it can make though.

Codyace, you call 1.8 a bad 60 ft time? I was happy as hell when I hit 2.1.

[CBGuamRealtor]

cams and stuff? you were running an s13 motor? I have an s14 motor which should make 10 percent more power for a given boost/ rpm level? This would equate to 300 whp to 330 whp on 15 lbs right or wrong?

does the different sr's make different HP n torque #'s with the GT2871r .64?? I have a S14 sr w/ stock cams n VTC...approx~ 300 whp or 330 whp?