Torn between two turbos

[niSm095]

I'm looking to build a reliable SR with about 350hp on the ground. My original idea was to go with a GT2871r and supporting mods. I want good response and relatively quick spool - a good street car that can be used at drift events.

Now, I've been offered a GT28rs with bottom mount manifold, turbo elbow and turbo lines for a very good price. From what I've read I wont be able to get quick as much power from this turbo. I've been reading that about 300 is all I will get out of a 28rs. The reason the RS is tempting is that I would have substantially more money to work with for other areas.

Anybody have an opinion on this matter? If you were in the same spot what would you do? Why?

I need help.

[steve shadows]

niether

i would do a .48 t3 housing 50 trim to4e compressor t3/t4 with a treadstone or other cheap top mount mani and pick up a used tial wg for cheap.

your life will be much better

[dirtdiggler666]

go gt3071r wooo ya

[CKAMC]

fuck yall pussies

IHI RX6R TCW 10 AR 20

but since you said street car... grab whats cheap, more power on the street ain't always what you need. I vote for the RS, if you can find it in the 86 AR go for it, get you a bit more for the size(its available in 64 AR but thats pretty much like a S15/GT28R). bottom mount for street, top mount with a larger turbo for track use(plus you will want a T3 flange by then),

300ish WHP is real good streetable size, 2871 power starts to push you into track/speeding ticket range more often. 71RS requires more of a tune and injectors than regular RS. Make it easy, RS is all you need to start.

[ECR33S14]

the disco potato wont make the power you want out of it. or so im told.

[ALEXTHESUS*PECT]

rs and use the other $$$ elsewhere. apex fc commander, or cage or .........

[rps13drift]

gt2871r- i havent met one person who didnt like it!

[niSm095]

niether

i would do a .48 t3 housing 50 trim to4e compressor t3/t4 with a treadstone or other cheap top mount mani and pick up a used tial wg for cheap.

your life will be much better

better how? what is your reasoning on that one? I'm curious. I've seen several complaints that the treadstone manifold mount sits at a bad angle, causing a t3/04 not to be able to fit, I believe not clearing the BMC. Is this true? Do you have experience with this setup? What sort of power would it make with supporting mods?


but since you said street car... grab whats cheap, more power on the street ain't always what you need. I vote for the RS, if you can find it in the 86 AR go for it, get you a bit more for the size(its available in 64 AR but thats pretty much like a S15/GT28R). bottom mount for street, top mount with a larger turbo for track use(plus you will want a T3 flange by then),

300ish WHP is real good streetable size, 2871 power starts to push you into track/speeding ticket range more often. 71RS requires more of a tune and injectors than regular RS. Make it easy, RS is all you need to start.

I've inquired as to the size of the a/r. I agree, hopefully it will be .86.



the disco potato wont make the power you want out of it. or so im told.

Hey Jonny, it's Andrew. I've heard the same thing, but I've also heard/seen that it may make enough power for me...so thats the main reason I'm asking the questions.

[niSm095]

gt2871r- i havent met one person who didnt like it!

I've also heard nothing but good things. The big drawback to me right now is the price. I've been quoted something very good for the smaller turbo, just want opinions on whether or not it will be worth it given my goals.

[nevaland9]

go big or go home...the GT2871r is what you want to come home to every night, it just never stops giving...i love mine so much i welded it to the elbow and manifold so it can never leave me.

[steve shadows]

better how? what is your reasoning on that one? I'm curious. I've seen several complaints that the treadstone manifold mount sits at a bad angle, causing a t3/04 not to be able to fit, I believe not clearing the BMC. Is this true? Do you have experience with this setup? What sort of power would it make with supporting mods?



.

the small .48 housing 50 trim combo will give you more power overall (in the case of comparing it to the .84 housing) , better respose than even the 2871r, with the right cams you iwll be able to hit 400 whp on race fuel. Im an external wg supporter all the way, i havent owned an sr setup without external since 2002. Whether it was 280whp or 450.

Suprisngly to some of you guys who have .86 2871rs the turbo is not that fast spooling in the grand scheme, my co-driver's car with a .63 housing and a thinner head gasket spools up faster than most of the 2871r cars ive driven. thats a P-trim T4!!!

I just threw the cheap mani idea out there so you cuold get away with the whole setup for the price of one internally gated 2871r.

Seriously man i would rather get a top mount ss autocrap mani + 38mm gate + t3/t4 than any internally gated turbo.

Then later shell out for a peak boost or full race or hybridynamics manifold.

You will make more power, more consistant respone and overall torque curve will be mroe predictable as well.

If you want to just fix your car then go gt28r, 2871r is good but to really make it work for you you will need to put some more money intot head.

If you are dead stuck ion the 2871r i would say get a housing that will be apt for an external gate or weld the door shut on it and get a decent manifold and modify it with tig welding for external gate.

If your just trying to go cheap and pull a couple horses the gt28rs is cool, 2871r is great, but if your serious about really ripping the tires apart theres nothin more fun that external.

For the money its my op that my suggestion will be plain just more fun.

sorry to bust all your guys bubbles, but hype can sell anything, even something as stupid as a disco potato.

[CKAMC]

steve is right but here is where I see things differently.

you said you want a street car.

street car has ac and is easy to work on and has reliability in mind. ohh yeah cheap as well.

RS because it uses that nice bottom mount that allows your ac to remain in tack. with 1bar and a (assuming you have a redtop) stock fuel system you have a fairly reliable car thats cheap.

ok you can do easy upgrades later on relating to fuel, manifold, cams, induction, oil(lines/pickup block), and a good tune.

but again RS requires the least amount of work and modification which does = less cash and thats in a sense is what a street car is.

now track car... yeah t3/t04, external wastegate, and top mount.... makes sense, but to make it work best you have to shell out a lot more cash into all those other parts I listed above you could add on later(if you went with the RS but cant since t3/t04 is again more track oriented).

2871... I rather see a 3071 63(or is 64) ar for how much is being spent...and it be t3... but that brings us back to what steve says(t3/t04).

So RS for if you do truly have street-able car in mind, t3/t04 gt3071 if you want more track. Again track cars aren't very street friendly(reliability starts to become an issue along with comfort items like AC).

Look at your wallet now. if that doesn't help you make up your mind then go flip a coin.

[niSm095]

the small .48 housing 50 trim combo will give you more power overall (in the case of comparing it to the .84 housing) , better respose than even the 2871r, with the right cams you iwll be able to hit 400 whp on race fuel. Im an external wg supporter all the way, i havent owned an sr setup without external since 2002. Whether it was 280whp or 450.

Seriously man i would rather get a top mount ss autocrap mani + 38mm gate + t3/t4 than any internally gated turbo.

You will make more power, more consistant respone and overall torque curve will be mroe predictable as well.

If you want to just fix your car then go gt28r, 2871r is good but to really make it work for you you will need to put some more money intot head.

sorry to bust all your guys bubbles, but hype can sell anything, even something as stupid as a disco potato.

hype has never sold me anything, especially in this case, only the price. :cool:

With a top mount, external gate and t3/04 turbo would i not have to do as much work to the head right now as i would if i went gt2871r?

[niSm095]

steve is right but here is where I see things differently.

street car has ac and is easy to work on and has reliability in mind. ohh yeah cheap as well.

RS because it uses that nice bottom mount that allows your ac to remain in tack. with 1bar and a (assuming you have a redtop) stock fuel system you have a fairly reliable car thats cheap.

ok you can do easy upgrades later on relating to fuel, manifold, cams, induction, oil(lines/pickup block), and a good tune.

but again RS requires the least amount of work and modification which does = less cash and thats in a sense is what a street car is.

now track car... yeah t3/t04, external wastegate, and top mount.... makes sense, but to make it work best you have to shell out a lot more cash into all those other parts I listed above you could add on later(if you went with the RS but cant since t3/t04 is again more track oriented).

2871... I rather see a 3071 63(or is 64) ar for how much is being spent...and it be t3... but that brings us back to what steve says(t3/t04).

So RS for if you do truly have street-able car in mind, t3/t04 gt3071 if you want more track. Again track cars aren't very street friendly(reliability starts to become an issue along with comfort items like AC).

Look at your wallet now. if that doesn't help you make up your mind then go flip a coin.

Whoa Whoa...Lets not get carried away with all that A/C talk...I've never had it in the 240. Just my Mini, the other car. ;)

Other than that, about the whole street car thing, you make a valid point

[Aoshi112]

What about the forced perfromance Big T28? I couldn't find much on this turbo but its something like the GT28RS but I think it flows a bit more? Not sure. What do you guys think?

[Cloud9]

A good friend has the 2871r and its wonderful, +1.

[driftenthusiast]

What about the forced perfromance Big T28? I couldn't find much on this turbo but its something like the GT28RS but I think it flows a bit more? Not sure. What do you guys think?
IIRC almost same price as GT28R, similar size, but not ball bearing.

[slothonaleash]

2871r has more room to grow if you are looking into going into the high 300's/low 400's in the future

[CKAMC]

The only hate i have on 2871r is that its still a t25 flange size... cripples what it could do.

now if it was a T3 flange? ohh yea flows a lot better/performs well.

Yeah you don't have to get cams or other work done...but again you need to decide: is this seriously a street car for you or a track car? street-ing with a 2871r just doesn't make sense since you have to spend a lot more to enjoy all the benefits of having one.

Thats why the RS is a good choice, cheap cheap cheap with power you will see right away.

Again if you just said to yourself "fuck its going to be track car" then a T3 flange top mount with external wastegate like steve said is the way to go. They do make GT's in T3 flanges FYI

[waynehead05]

What about the forced perfromance Big T28? I couldn't find much on this turbo but its something like the GT28RS but I think it flows a bit more? Not sure. What do you guys think?

it can support around 3400whp vs 320ish max on the disco potato. it flows more... but it's old technology. i had a buddy with an eclipse with one and it was a lot of fun... but there's better options today.

[rockinpandas]

i love my 2871r

[niSm095]

The only hate i have on 2871r is that its still a t25 flange size... cripples what it could do.

now if it was a T3 flange? ohh yea flows a lot better/performs well.

Yeah you don't have to get cams or other work done...but again you need to decide: is this seriously a street car for you or a track car? street-ing with a 2871r just doesn't make sense since you have to spend a lot more to enjoy all the benefits of having one.

Thats why the RS is a good choice, cheap cheap cheap with power you will see right away.

Again if you just said to yourself "fuck its going to be track car" then a T3 flange top mount with external wastegate like steve said is the way to go. They do make GT's in T3 flanges FYI

I think I've pretty much decided on the 28rs, just because of the price, and the fact that I'll have more to spend elsewhere.

I plan on, in the next couple days, buying that turbo, new clutch/flywheel, intercooler, bigger injectors 550 I suppose, an AFC neo, the new Greddy Easy cams, rocker arm stoppers...and a few other things

[CKAMC]

try and find someone that can do a rom tune in your area. neo afc iis just a glorified safc which is used for adjustments not for tuning.

dont forget to grab a maf...maybe a fuel pump.

good luck and have fun :)

[niSm095]

I cant find anyone close to me that can do rom tunes. SC isn't exactly the import capital of the east coast. Working on the Maf, fuel pump has been in since about 2 wks after i bought it

[CKAMC]

One man

Enthalpy

Florida is a lot closer as well.

[hayaimoto]

Honestly I would go for the GT2871, its bottom mount yes...but its not to bad of a turbo that would "simply" bolt on with enough room for power...I would say that the gt28 is a great street turbo but your limited on what you can produce, just look at it this way the 2871 is going to give you more room to play with incase your hunger for power is over 300rwhp. And all the talk about lag doesnt really effect the performance because good tuning should cure that problem. Good luck!

[s Trust x]

2871r .64 @ around 20psi w/ a solid tune and cams will get you into the 340-360 range. quick spool with full boost low-mid 3k rpm

2871r .86ar w/tune & cams will get you over 360 but I wouldnt expect to see anything much higher than 380ish - full boost at mid 3K - low 4K rpm range...

btw: with stock s13sr cams it is pretty common to hit around 330whp max. a set of hks step 1 264's will fix that.

[CKAMC]

you other guys need to take the time to read my arguments regarding 2871r and the fact this guy said he wants a street-able car with some track time seen.

AGAIN until this guy is dedicated to making the car full blown track he doesn't need to over do things for the streets.

You can make 330whp with a GT28RS just google...

Saying this guy might have a bone stock car that at 10psi can make around 250whp... a 80whp gain is a big jump(realistically butt dyno is pretty gay)

Anyways the guy is fairly set now anyways on what he is going to get for now.

[articdragon192]

Norm aka usdmsilvia is running a GTRS on his S14 SR and made 330ish IIRC. It can be done.

[CKAMC]

Norm aka usdmsilvia is running a GTRS on his S14 SR and made 330ish IIRC. It can be done.

HKS GTRS or GT28RS?

Just looking to make a clarification thats all since their is quite a difference between the two

350whp can be done on a GT28RS just like 420whp can be done on a 2871r.

[niSm095]

someone said that enthalpy tunes are only really good if you take your car to them to dyno tune. Is this true? I have no problem sending them my ecu

[CKAMC]

That sounds a bit bias, yes every car can do better if peformed via dyno but his tunes are done based on years of experience, that can be trusted.

I know at least 5 people who have sent in their ecu's to him and have had no problems.

if you want to yeah you can still grab that neo afc to adjust to how you want things (a little lean or a little rich). Read of one GT28RS setup that uses both enthalpy and a afc neo and puts down 330whp.

in fact here is the link http://forums.freshalloy.com/showthread.php?t=167454

[rps13drift]

Enthalapy tunes are totaly great for rom tunes! a buddy of mine has one on his s14 and he loves it!

[bigOdom1]

you cant go wrong with enthalpy. only compaint i here is from impatient people who try to rush him. mine was so spot on i didn't need the safc to fine tune it at all

[niSm095]

so the enthalpy should be just drop in and drive? no need to further tune? I would assume that since they aren't dyno tuned that they would be set up a little rich? But completely safe none the less. I'm excited to see if I can't get that done.

For Enthalpy, I know heavythrottle advertises them, is there a better place to look?

[CKAMC]

for all your enthalpy questions please visit and contact the guy @

http://www.rs-enthalpy.com/

[articdragon192]

HKS GTRS or GT28RS?

Just looking to make a clarification thats all since their is quite a difference between the two

350whp can be done on a GT28RS just like 420whp can be done on a 2871r.

HKS GTRS. Sorry for the confusion.