Why the GT2871R???

[JDori]

can anyone answer this for me. is there a real reason every one runs this turbo on their SRs. What other turbos are in its range as far as trims, flow , and HP.


im just trying to get some researching in so i can start planing for my SR build.

[FlatWoodsMonster]

I run a T88-38GK on a stock KA I dont even hit boost.

[240sxautox]

LOL

2871R because it spools quickly, builds nice boost, etc.

If you want to be different do a 2876R
lol. or a GT30R that would work.

or you can get mega slow spool like me and get a GT32.

[AFSil80]

From what I've witnessed firsthand, it's a very streetable turbo setup, and not too hard on the wallet. This is a huge thing since we all know most 240 owners are running on a budget of some sort, haha!

[Lone_Wolf]

price vs hp

its t2 flange so you can bolt it to stock maifold, use same o2 extension, same downpipe, same hotpipe & intake pipe to get 400-450whp (depending on a/r .64 vs .86)

instead of

top mount manifold, custom hotpipe, custom downpipe custom intake pipe to get basically the same hp (depending on turbo selection)

plus its got better spool characteristics.

good luck

[DAsquintz]

I run a T88-38GK on a stock KA I dont even hit boost.

t88s are for pusssieeeeeessss. i run a t-100-50gk on my civic with 240 body kit on it

[AFSil80]

t88s are for pusssieeeeeessss. i run a t-100-50gk on my civic with 240 body kit on it

Weak. I've got a GT55-91mm on my D15B7 swapped into my mom's Buick LeSabre, with 19x11" Focal wheels and 355s on the back.

[JDori]

price vs hp

its t2 flange so you can bolt it to stock maifold, use same o2 extension, same downpipe, same hotpipe & intake pipe to get 400-450whp (depending on a/r .64 vs .86)

instead of

top mount manifold, custom hotpipe, custom downpipe custom intake pipe to get basically the same hp (depending on turbo selection)

plus its got better spool characteristics.

good luck


so would this not be the turbo to go with if i wanted to run a top mount manifold( prolly full race)... since its t2 flange, would it even bolt up to the that manifold.

[Broke240]

If you are going to go top mount with a full race manifold, get the divided manifold with a GT30R with the divided housing.

That is the perfect set-up for a SR.

[AFSil80]

If you are going to go top mount with a full race manifold, get the divided manifold with a GT30R with the divided housing.

That is the perfect set-up for a SR.

Twin scroll FTW.

[Lone_Wolf]

http://www.full-race.com/catalog/product_info.php?products_id=1433&osCsid=70410c9fb1824d44ceb1af55e932f7d1
thats a nice manifold, but pricey.

enjuku has this for 830
http://cheapturbo.stores.yahoo.net/nissansr20det.html
lifetime warranty.

[JDori]

what are the advantages of having a twin scroll, or better question what is twin scroll.

[Broke240]

Twin scroll will spool faster.

Here is a picture of the twin scroll manifold.

[AFSil80]

what are the advantages of having a twin scroll, or better question what is twin scroll.

By having a divided manifold, the pulse from cylinders on opposite cycles don't interfere with each other. In other words, when the port from another cylinder is pushing air, it don't flow towards the tube running from a closed port.

Divided housing turbochargers are more expensive, but again, it's quicker spool up which is when it comes down to the consumer deciding if he's willing to spend the extra $$ to get power that much sooner.

[JDori]

so is it possible to run a non divided turbo and divided manifold, or visa-versa. or do u have to have both.

thanks guys for this valuable info, it really helps alot.

[Broke240]

You can run either one without the other but you won't get the full advantage of having both.

[JDori]

so what would be some other choices for twin scrolls other than
GT2871r and GT30R


im goals are gonna be around 350-400whp

[Broke240]

Well a GT30R is gonna get you well over 400whp.

If 350-400whp is all you want then the 2871 is a good choice. Or you could go the cheaper route and get a t3/t4 50 trim and make 400+whp. Its not twin scroll but it will still spool pretty quick.

[Wedge]

Or you could go the cheaper route and get a t3/t4 50 trim and make 400+whp. Its not twin scroll but it will still spool pretty quick.


This is what I am doing. 50 trims are cheaper so you can put that money toward a top mount manifold. Hybridynamics makes a nice top mount and is cheaper than Full Race.

Twin Scroll IMHO is not really worth it for the money. **zips up flame suite**

[JDori]

do u have link to the Hybriddynamics manifold


as of right now im settle for getting a peak boost manifold/downpipe/dupetube and GT2871R .86 a/r.....but if there is a good alternative im open ears.

[v-empire]

google is your friend. you have the name. google it, you will get their website.

[JDori]

yea i just did....i wasn't thinking.

but Dave i should be pming you list of engine stuff to night. i wanna get some opinions on it. Also is there a preference for ems tuning system cause im not sure what to do there. i see alot of ppl running the Power FC.

[Lone_Wolf]

power fc is the shizzzz

[JDori]

goggled it...its a very similar design to the peak boost at the same price......but runs 44mm wastegate instead or 38mm like the PB.

[SR20DETg20girl]

do u have link to the Hybriddynamics manifold


as of right now im settle for getting a peak boost manifold/downpipe/dupetube and GT2871R .86 a/r.....but if there is a good alternative im open ears.
Just FYI there are several different versions of the GT2871R. I prefer the 472560-15 part number as it is one of the most efficient (better boost response too) the only thing about that is that it comes with the .64a/r housing so if you want the .86 you'll need to maybe order the turbo as the CHRA and housings separately, or (depending who you order from) get them to swap on the .86 instead.

also, in response to your earlier question... the GT2871R is an offshoot of the GT2860RS (disco potato) which was originally developed specifically for the SR20 motor. the GT2860RS provides great boost response (especially with the .64 housing) and is well matched to the flow characteristics of the SR. however, for those who wanted a little more power, the GT2871R was released which is essentially the GT2860RS HOTside with a larger compressor wheel and housing for more flow and power without sacrificing that awesome no-lag spool up :)
therefore, the reason everyone runs it is.... relatively cheap since it's a T28-based turbo, can bolt on to stock manifolds and only requires a little modification for fitment, quick spool/great throttle response and it makes fantastic power.

edit: for those who already have a GT2860RS, you can order the 71R compressor wheel and housing as an upgrade and keep your current chra and turbine housing. just remember to get it professionally balanced!

[Casey]

Just FYI there are several different versions of the GT2871R. I prefer the 472560-15 part number as it is one of the most efficient (better boost response too) the only thing about that is that it comes with the .64a/r housing so if you want the .86 you'll need to maybe order the turbo as the CHRA and housings separately, or (depending who you order from) get them to swap on the .86 instead.

also, in response to your earlier question... the GT2871R is an offshoot of the GT2860RS (disco potato) which was originally developed specifically for the SR20 motor. the GT2860RS provides great boost response (especially with the .64 housing) and is well matched to the flow characteristics of the SR. however, for those who wanted a little more power, the GT2871R was released which is essentially the GT2860RS HOTside with a larger compressor wheel and housing for more flow and power without sacrificing that awesome no-lag spool up :)
therefore, the reason everyone runs it is.... relatively cheap since it's a T28-based turbo, can bolt on to stock manifolds and only requires a little modification for fitment, quick spool/great throttle response and it makes fantastic power.

edit: for those who already have a GT2860RS, you can order the 71R compressor wheel and housing as an upgrade and keep your current chra and turbine housing. just remember to get it professionally balanced!



good info +6


and a divided t3 or divided t4 setup isnt going to nessesarilly give you faster spool time... its completely about setup.

and you cant just slap a t4 manifold, and turbo on your motor and say yeah twinscroll! imo... the sr isnt large enough for a good twinscroll setup.
just get a t3 topmount. dump the extra money into good pipes, good exhaust, and a good wastegate and boost control setup. t4 isnt worth your money.
do some in depth research. and on a budget build. i dont know how i could justify spending just as much on a manifold as i would the turbo.

[SR20DETg20girl]

right, you have to think about manifold tuning (equal-ength vs. log-style, etc.) and how your intercooler piping is routed (too many crazy bends or excess length=no good) as well when you're trying to think in terms of helping increase your spool up time.

edit: another thing people usually don't realize is how the o2 dump is routed if you're using an externally wastegated turbo. you want to make sure that if you are dumping to atmosphere that the wastegated air is routed far enough away from the intake to avoid being sucked back in. i've seen dynos of cars that just dump to atmosphere and then have it rerouted to run under the motor and they gain some serious hp just from getting rid of crappy intake air. sounds crazy, but it really makes a difference.

another suggestion that is actually a lot cheaper than the GT2871R and *almost* as much fun...
go to a junkyard or ebay and buy a BLOWN T3/T4 turbo. that's right, it doesn't matter how crappy it is as long as the compressor and turbine housings are fine (you don't want them all scratched up from debris damage to the wheel(s). you can probably pick one up for about $50 or so. then call up a Garrett distributor and, this is where it gets cool, buy a brand new *ball-bearing* T3/T4 CHRA for about $700. mount the old-turbo housings to the new center section and for about $800 you will have a brand new ball bearing T3/T4 turbo. pretty sweet huh? ;)

[AFSil80]

Will you marry me?

[Lone_Wolf]

call reverend shnorr. it'll only cost $100 :yes:

http://www.jerryspringertv.com/posse/rev_shnorr.htm

[SR20DETg20girl]

Will you marry me?
sure, so long as you understand my car will always come first ;)

[PSINXS]

i'll trade my wife for you lol

[SR20DETg20girl]

so i get the wife? does she cook/clean? i really could use one of those around the house...

[Wedge]

goggled it...its a very similar design to the peak boost at the same price......but runs 44mm wastegate instead or 38mm like the PB.

http://shop.hybridynamics.com/index.asp?PageAction=VIEWPROD&ProdID=211&HS=1

$825

You can request them to put a 38mm wastegate flange instead of the 44mm. They also claim to design this manifold to move the turbo as close to the front of the car as possible to keep the heat away from the BMC.

[PSINXS]

so i get the wife? does she cook/clean? i really could use one of those around the house...

yeah thas how it works. she cleans and cooks while you come here and fool with our 240s, then you go home to a clean house and hot meal. everyone's happy!!! lolz

[omgtofu]

i have a nifty resource if anyone here feels a little lost on whats being discussed. http://www.mediafire.com/?8mcbnn9zfxd

[SR20DETg20girl]

yeah thas how it works. she cleans and cooks while you come here and fool with our 240s, then you go home to a clean house and hot meal. everyone's happy!!! lolzyou've got yourself a deal my friend.


i have a nifty resource if anyone here feels a little lost on whats being discussed. http://www.mediafire.com/?8mcbnn9zfxdawesome! thanks for sharing!
www.TurboByGarrett.com also has some really great FAQs and tutorials (Turbo Tech)

[JDori]

sure, so long as you understand my car will always come first ;)


wow now that is every man's dram wife.....:goodjob::goodjob::goodjob::goodjob:

on another note i plan to take the

GT3071R route with peakboost manifold

[JJ Alfano]

i never knew id learn so much about turbos in 5 minutes (talking about Garret's Turbo Tech)

awesome website for sure

[SR20DETg20girl]

wow now that is every man's dram wife.....:goodjob::goodjob::goodjob::goodjob:i wish! my boyfriend always bitches about how my car, my iguana (rip), horses and my mom come before him. not that i've *ever* chosen them over him, but, i totally would ;) jk
i always tell him "my car was here before you were, and she will be here after you're gone" god i'm such a bitch.

[AFSil80]

sure, so long as you understand my car will always come first ;)

Hey, you got income too right? :lmfao:

And kudos to you being a 'self proclaimed bitch' about keepin the car. I'm takin mine to the grave...hell, it'll probably the thing that puts me there.

[SR20DETg20girl]

income? what's that?
hah yeah i have a job and i'm a total jew when it comes to spending money but i have TONNNNS of student loan debt so i actually perpetually have negative money :(
one day, when i'm old and the car is old, i'd love to strip it down to the bare chassis and do a complete restoration on her. she deserves it. but that's like, twenty years from now. hah.

[AFSil80]

Yeeaah, about that chassis strip down...it sucks. Done it twice already, and never again.

Props on the LMGT4s, BTW. I <3 my GT2's, haha.

[revel]

so about when should the 2871r with .86 expect boost to start versus the .64?

[Z U L8R]

go with the .64, just my .02

[SR20DETg20girl]

so about when should the 2871r with .86 expect boost to start versus the .64?i start building boost as soon as i tip into the throttle with my 2860rs .86. i hit full boost by about 3krpm (have to double check though, haven't driven the car in ages) but i have some nice headwork done to help flow. the thing you have to remember about ars is the larger the number, the slower it'll spool but the more topend you'll get. the lower/smaller the ar, the quicker it'll spool but you'll sacrifice some power up top. so the .64 will spool faster and hit full boost quicker than the .86, but the .86 will make more top end power than the .64. it really depends on what you want from the car, realistically.


Yeeaah, about that chassis strip down...it sucks. Done it twice already, and never again.

Props on the LMGT4s, BTW. I <3 my GT2's, haha.that's why i said *eventually*... aka when i have so much money i can pay someone else to deal with her. ah, dreams... i <3 your GT2s too!


go with the .64, just my .02i agree. the .64 on the 2871 is a GREAT choice

[revel]

so i already have the 2871r with what i think is the .86 trim. i dont start making boost until about 4k but it holds strong until 7400. is there anything i can do to increase spool up?

[Lone_Wolf]

advance timing

[v-empire]

so i already have the 2871r with what i think is the .86 trim. i dont start making boost until about 4k but it holds strong until 7400. is there anything i can do to increase spool up?

cams.

you can also change it to a .64

preference.

[homeslicej2]

Good info in here.:)

[Z U L8R]

cams will help for sure, right on @ v-empire

you could also add nitrous......seriously...but i would recommend cams or the .64 as well first.

[SR20DETg20girl]

cams.

you can also change it to a .64

preference.+1

[revel]

warning:warning:warning: dumb question and i am being lazy.

how does one switch from .86 to .64?

[Z U L8R]

unbolt turbo, unbolt exhaust housing from center cartridge of turbo, replace with smaller more boost friendly .64 exhaust housing. reinstall, start car, enjoy way less lag =]

[SR20DETg20girl]

part number for the .64 housing is 430609-230

[revel]

thanks for all the info. gonna get my boost controller and FC properly tuned then see if i still want the .64 housing.

[Drunk'nDrifter]

Does Full-Race make a manifold that bolts up to a 2871? I'v checked the website and didnt see one.. Just curious.

[Slip N Slide S14]

and you cant just slap a t4 manifold, and turbo on your motor and say yeah twinscroll! imo... the sr isnt large enough for a good twinscroll setup.
.

HUUUH????

First off, no one is talking about T4 flanged turbos, no one on here will be running anything that large.

And....Twinscroll for the SR is badass, I can post dyno sheets and factual information for days. Its proven, it works, its good.


For the original question. Its a popular turbo mainly because it is one of the largest turbos you can bolt on to the stock manifold and make 400whp. Its pricey though, you can make a topmount setup for the same amount of money and have more headroom for future upgrades. A topmount 30R will spool the same as the bottom mount GT2871r, or a T3/T4 50 Trim topmount would also be equivalant. They will all make full boost at about 4300-4400 rpms.

[AFSil80]

Twin scroll is badass, regardless of what it's being used on. Divided housings FTW.

(Holy old thread, BTW)

[zebrafantastic]

cams.

you can also change it to a .64

preference.

more specifically, what duration/lift would be effective?

HUUUH????

Its pricey though, you can make a topmount setup for the same amount of money and have more ?headroom? for future upgrades. A topmount 30R will spool the same as the bottom mount GT2871r, or a T3/T4 50 Trim topmount would also be equivalant. They will all make full boost at about 4300-4400 rpms.

if willing, please elaborate

[FlatWoodsMonster]

this old ass nigga thread

[juanito]

dude i say get the deal they have at tiger racing right now, i think is a 20G turbo and all the turbo lines (water, oil) for like $1100... thats a great deal, those are the turbos that Sammy at tiger racing rocks...

[zebrafantastic]

this old ass nigga thread.

[MongolPup]

The twin scroll GT3076R spools faster while flowing more air than the disco potato. The twin scroll comment was baseless.

PROOF OF ABOVE CLAIM:

http://www.full-race.com/catalog_images/SR20_ProStreet_RWD/sr20dyno1.jpg

From Full-Race Motorsports. "SR20DET Dyno Comparison of Full-Race Twinscroll GT3071R .78 A/R (Blue Line) vs. Single Scroll GT2871R .64 A/R (Red Line). AFR was 11.5 and dyno was done in 4th gear. 84 degrees with about 50 percent humidity. Both runs were about 19 PSI. Rom tuning by RS Enthalpy"

[Casey]

HUUUH????

First off, no one is talking about T4 flanged turbos, no one on here will be running anything that large.

And....Twinscroll for the SR is badass, I can post dyno sheets and factual information for days. Its proven, it works, its good.


For the original question. Its a popular turbo mainly because it is one of the largest turbos you can bolt on to the stock manifold and make 400whp. Its pricey though, you can make a topmount setup for the same amount of money and have more headroom for future upgrades. A topmount 30R will spool the same as the bottom mount GT2871r, or a T3/T4 50 Trim topmount would also be equivalant. They will all make full boost at about 4300-4400 rpms.

hahaha this thread is so old

yea i thought they were talking about t4 twinscroll setups.

i re-read the thread just now lol.

[I RON DON KEY]

old thread is old.

[MongolPup]

Jesus this thread IS old. And to the bump-er: I know they used to, but it's vanished from the site. So yes they exist used.

[Casey]

if youre really interested in buying a full race manifold,


call them.

im sure they will be more than happy to make you one if they dont have anymore in stock.

in companies like that, if it means keeping a customer they usually do it. especially if its nothing out of the ordinary.

[Ahut2000]

old threadness . I got the 20g i'll be running on a topmount :)

[driftfreak91]

Ive got a s15 full turbo kit upgrade but will only hold about 350hp but it is easy on the wallet and hits full boost at about 3200 rpm's. It really just depends on what you are trying to do....drift,drag, etc... You dont really need a real big turbo for drifting b/c you need all of your boost sooner instead of later.

[Levi]

I'd like for someone to try twincharging, then your powerband would be linear, which is what you need for drifting.

[RHDS13]

i have 2871r and i love it it spooles faster than the t25 i had lol and with a shit ton of more power faster lol i love mine i bought mine from sammy

[sergey911]

My friend Jesse has it, he's makin 400hp+ with it. 86 trim btw

[PLAY]

turbos are gay.


(until i can afford one)

[SB-Autoworks]

turbos are gay.


(until i can afford one)

I like your logic, makes perfect sense.

coilovers, nice wheels, stand alone, (bigger than factory) turbos, are all gay too... until I can afford them.

[Shiri Juu Atenza]

Disco FTW unless ur tryin to make 380-400

[whatever210]

just read this whole thread and theres a lot of great information in here.

[Neejay]

I run a T88-38GK on a stock KA I dont even hit boost.
shit, I actually remember that post. ahahahahahaha

[dimsumboy]

hi, i'm new here. lots of great info i got from this thread, you have made up my mind which turbo i will get when the current one dies. gt2871 .64 is what i will buy when the time comes. thanks to all for sharing your information.