Turbo Talk- differences in GT2871R's

[itsnever2fast]

As some of you may know, garrett makes 3 different variations, all come in .64 and .86, the last one is specificaly for the SR20DET

http://www.turbobygarrett.com/...1.htm

http://www.turbobygarrett.com/...2.htm

http://www.turbobygarrett.com/...5.htm

Does anybody know the differences on the dyno and the street? I understand the number differences in the specs, but how is the performance affected on the SR20. Does anybody have experience with these turbos?

[deCksy]

.64 = low end power, quick spool, good for drift.86 = high end power, a bit slower spool, decent for driftSR20 one - a bit quicker spool if not the same as .64, good for drift, direct fit.

[hayaimoto]

anything that is larger then the .81 range on the hot side will have more lag, and will perform greatly under boost conditions over 10psi.

[DrifterProdigy85]

There difference trims too. 48, 52, 56 trim i think. T28 Style 2871R is a 52 trim available in .64 or .86 A/R. Same as the HKS GT-RS. 2871R that most of us use is the 56 trim available in .64 or .86 A/R. Makes a little more top end power than the 52 trim. Dont know anyone using the 48 trim. There is also a T3 2871R thats available in .63 or .82 A/R. Not sure of the trim. If your willing to spend the money, its better going top mount. This turbo flows good enough to take advantage of the T3 housing. Should make a smoother torque curve and peakier power.

[DrifterProdigy85]

As far as what power is made. 56 Trim.64 - 375+whp.86 - 400+whp

52 trim.64 - 350+whp.86 - 375+whp

52 trim may give quicker boost response over the 56 trim. Cant go wrong with either of them though.

[itsnever2fast]

so i am guessing you are running the 56 trim?

[DrifterProdigy85]

yup. 2871R .86 56 trim pulls hard hard to my rev limiter of 7500rpm. Might make more power past that but i never dynoed it yet.

[ILikeMy240sx]

I have the GT-RS type. I will be installing a set of BC cams soon and interested to see what the dyno result will be.

On the current setup on a Mustang dyno I put out 305 at the wheels. One run that I didnt get a picture of was 310 at the wheels.

[DrifterProdigy85]

I really want to dyno mine but everytime i do i get horrible wheel spin on a dynojet. Only other alternative is to use a dynapak but they always seem to read really high. I usually just go off of Trap Speeds at the track to tell my power. Seems to be the most accurate.

[2forty]

are you having a lot of traction problems? 400+whp should net over a 117mph trap. ive seen 370ish whp do over 119mph

[DrifterProdigy85]

117mph Trap Speed was done @ 16psi on the Stock Intake Manifold. Havnt been back yet running 20psi and the Greddy Manifold. Its a huge difference than before though. 117mph trap is around 350whp i believe. Not bad for 16psi IMO.

[DrifterProdigy85]

I hope to be around 122-123mph next time i go.

[pauliedrft]

ok to many choices i need some help here are 2 links will either one of these work on a s-14 sr20det notch top. i don't need the actuator cause im going with the hks one .Please help and I plan on using stainless braided lines also .. And after market mani.

http://www.staticxmotorsports.....aspx

http://www.staticxmotorsports.....aspx

[gixxerbob]

CODYACE AND IDAHOTUNER, WHERE YOU AT???? haha

what is the difference between the t04b and t04e compressor housings?http://www.jgycustoms.com/240sx/turbos.htmt04b

http://www.atpturbo.com/Mercha...e=GRTt04e

what turbo does codyace use or would he reccomenddoes anyone know what turbo is offfered by jgy (garrett part number?), their kit is by far the best deal i have found w/ the 72 lb top feeds w/ fuel rail http://www.jgycustoms.com/240sx/turbokits.htm

i plan on doing a codyace inspired 400+rwhp build.

1995 s14 sr20 (stock bottom end)gt2871r .64 (NOT gtrs style) 18-20 psi72 lb top feed injectorsjgy top feed fuel railpower fc d-jetro map sensor kitkoyo/f-a-l fans/nismo thermostathead milledtomei head gasketarp head studsBC 264 cams (sorry codyace, not s3)BC springsgreddy 1 peice s14 intakeextrude hone turbone housingmegan manifolddei header wrapgreddy m specssqvnismo fprhks hi power 3"megan down pipemegan test pipexspower elbowspec stage 3 clutchspec street flywheelz32 ignitor chipz32 fuel filterinnovate lc-1 widebandaem truboosttop fuel turbo timerz32 trannymazworx transmission adapteraluminum driveshaftz32 diff (to 18" 8.5/9.5 kumho)greddy rasngk iridiumsand a ton of other parts on my list that are not that important to list...i already have most of the parts(like the megan/greddy/nismo/koyo/z32 pats...)

i will be posting a GT2871R build thread this winter, w/ a sick suspension build (k-sport, complete z32 brake conv. w/ rear uprights, volk gt-p's, tons o f new bushings, spl parts....)

what do you think of as far a power goal of 400rwhp

the only thing i am unsure of is the exact part number turbo to go with, if i want a greddy turbo elbow, power fc boost contoller kit, and if the z32 trans is overkill because it is sooo much coin.haha

[kentuckyslider]

I have alomst the exact setup that you want. I have a built bottom end and tomie 260 procams with BC springs with the jgy fuel rail and injectors. I have the 52 trim .64 ar GT2871R and I make @375whp at 21psi with the cams. If I had a greddy intake I would be all over 400whp but I wouldn't have 350lb/ft of tq. You gain 20 whp with the intake and lose 15-20lb/ft of tq. I do have a jwt rom tune and it is more than enough for a 2871R. You can do the power FC if you want.

[gixxerbob]

i would only go power fc since

A. my ecu is from an auto sr so i would have to buy a manual ecu (125$)B. i would spend $600 on a rom tune (jwt)C. i would feel obligated to keep my safc2 for fine tuning

OR i could sell the safc ($200), auto ecu ($50), and z32 maf/plug/popcharger/k&n ($125)for a couple $'s and get a fc w/ controller w/map sensor kit for under 1200$ and for the difference of a few hundred i feel that i would be better off and probably squeeze out a little more hp's in addition to going MAP sensor!!!!!

(and ill probably sell my aem truboost for $200 and get the powerfc boost kit for 350$..(although looking into the 3bar gm sensor but unlucky for finding info). it would be nice to switch from a 400hp map to a 250hp map with one controller and never need a reflash again.

Most of my build is based on "bang for the buck" and best parts for the job while keeping my budget in mind.

opinions on a mazworks z32 transmission for 400hp SR?

what transmission do you use w/ how much hp,torque

[kentuckyslider]

If you're not going to run wrinkle walls at the track the stock transmission will be fine if it's in good shape(most aren't). I tore all the teeeeth off 2nd in my worn out SR transmission and I did a KA/SR transmission swap for $150. I love the KA transmission. It is the same transmission as the SR(with a talller 5th gear), but it hadn't been beat on like most SR transmission's and had never seen the rpms that SR's see. The bearings where much tighter. I have a 6 pad ceramic competition clutch rated at 525ft/lb and a jgy 10.5lb flywheel. I have over 200 passes on the setup and I have only replaced the clutch once. I run 26x8.5x15 MT drags and cut consistant 1.6-1.7 60' launching at over 7000rpm. IMO I would get MT et street radials and be easier on the transmission.