GT2871 USERS. SR motor

[S13 curtis]

I will probly have a dyno sheet up this week. 9 psi low boost just to see where its at until i get extra money for a high boost tune.im also on stock cams. hopeing for 260-270whp on the dyno jet.

[S13 curtis]

Originally Posted by Sleepy240

See whats weird and I see all these numbers and my car doesn't make nearly what i think it should then...

S13 Redtop
gt2871r 64ar
550cc Sards
264/264 BC
Retainers/Springs/Valves
New Rods/Piston/Rings blah blah
3" Catback/downpipe etc
Tial 44mm External Gate
Bored/Honed Stock Mani
FMIC
Enthalpy Tune

@ 22psi I only made 335 HP // 305 TQ

what type of dyno were you on?

[moses]

I just want to start off by saying thank you zilvia. You guys helped me through some hard times and I finally got to show what my car was made of before I left. I did not get what I wanted but I am satisfied. 356HP 306 torque on a dynojet.


MODS:
gt2871r 64
tomie 740 injectors
the front mount that came with the heavythrottle package. Think the lowest greddy one.
Freddy intake manifold
300zx maf
tomie elbow
3 in exaust w/ apexi n1
S3 cams
apexi 1.1 headgasket
jwt tuned ecu
fine tuned with afc neo
bunch of other little goodies
Boosted at 18psi and air fuel ratios were at 11.5. Wanted to go a little safe.

[moses]

Haha, I say I want to stay safe and look what happens

That is my #1 spark plug. NEVER TAKE YOUR 240SX ANYWHERE IN ARKANSAS FOR ANYTHING. I swear I hate this place. I posted it in tech talk if you have any comments.

[jakerps13]

Got the T3 .82 a few weeks ago. Here's a comparisons next to a t2 .86

[S13 curtis]

^^^*awaits dyno sheet*

I,m pretty excited to see the result and hows the spool on it.

[S13 curtis]

Originally Posted by jakerps13

Got the T3 .82 a few weeks ago. Here's a comparisons next to a t2 .86

I also found out you can swap the compressor housing with the GT3071r (T4) Compressor housing and push close to 450+ whp give or
take. http://www.atpturbo.com/Merchant2/me...egory_Code=GCH

[slider2828]

Hey everyone just wanted to post my numbers with a PFC DJetro on a DynoJet.

GT2871R .86AR non-GT frame
264 HKS Step1
Stock IM/EM
Greddy Elbox
Catco Cat
Blitz Downpipe
Blitz Exhaust with Silencer
Blitz LM Intercooler
Apexi 1.1
DW 600cc
Greddy Profec E01 - @ 14PSI up to 25MPH and 16psi 25+MPH

What you guys think? 0 smoothing....

[Sileighty_85]

Originally Posted by S13 curtis

I also found out you can swap the compressor housing with the GT3071r (T4) Compressor housing and push close to 450+ whp give or
take. Compressor housing for GT3071R with 71mm 56 trim wheel - 4" Inlet and 2" outlet: atpturbo.com

Hmmmmm that is very interesting and a nice upgrade.
I might go for that when i want more power :P

[deukalionS14]

I had Steve dyno my car on the Dyno Dynamics and i only got 264whp. I almost cried lol i held it in though hahaha. My JWT tune runs rich though...wasnt even in the 11's for WOT A/F ratio.

my main power set up:

GT2871r .64
264/274 cams
Megan Ex. Mani
and some other goodies

McKinneys is helping work through this though. my FPR was at 40PSI but was running so rich i could even drive at one point...oh well the time will come where i will hit over 300whp on the DD.

[drifter_for_life06]

a buddy of mine hit 400+ with his .86. Had bc 264 cams, z32 maf and all the other normal b/s everyone has....believe he made those numbers at 21psi

[deukalionS14]

damn dude thats impressive. i have the .64 so i wont make that but i'll take 350whp hehe.

This shit is getting crazy though...it might be the injectors so we're sending them to LA to get tested...also, the conditin is getting worse...i'm taking it off the streets today for however long it takes to fix...it's so damn depressing...i've been drinking my self to sleep everynight...

[Sileighty_85]

Originally Posted by deukalionS14

damn dude thats impressive. i have the .64 so i wont make that but i'll take 350whp hehe.

This shit is getting crazy though...it might be the injectors so we're sending them to LA to get tested...also, the conditin is getting worse...i'm taking it off the streets today for however long it takes to fix...it's so damn depressing...i've been drinking my self to sleep everynight...

you should make more than that

I made 363whp on Stock cams and Intake Mani @ 21psi

[flamebag16]

Looking for opinions, ideas, suggestions
I have s14 sr20det being fully built

Wiseco Pistons
Eagle Rods
Arp Head Studs
Arp Main studs
Balanced crank
Apexi Head Gasket
BC Springs/TI retainers
HKS s2 272s (intake/exhaust)
Greddy intake manifold
AEM EMS
Sard FPR
Nismo 740cc
GT2871R .64

Was thinking bout running E85 but then would have to upgrade injectors, so i guess what im asking is how much power should i make on the 2871r pump gas (93) and now that motor is built to withstand much more power then 2871r will provide What other turbo options do i have

[idahotuner]

Originally Posted by drifter_for_life06

a buddy of mine hit 400+ with his .86. Had bc 264 cams, z32 maf and all the other normal b/s everyone has....believe he made those numbers at 21psi

you wouldnt be talking about my car would you?

gt2871r .64, 264 cams, greddy intake, Mr exhust and o2 740cc z32maf

[steve shadows]

Originally Posted by S13 curtis

I also found out you can swap the compressor housing with the GT3071r (T4) Compressor housing and push close to 450+ whp give or
take. Compressor housing for GT3071R with 71mm 56 trim wheel - 4" Inlet and 2" outlet: atpturbo.com

doesnt make that big of a difference.

Basically you built a GT3071R with a 28R wheel.

In most cases in my experience the reverse theory works best on SR's.

Smaller housing huge turbine wheel, matching (in mass) front wheel, moderate sized intake housing.

Interested to see the results though

I think you guys should be very careful when evaluating comparing dynos:

1. Dynos work off a lot of correciton values, if one of these is off or the dyno operator is not fully versed the dyno will ready WAY HIGH or WAY LOW
a. barometric pressure
b. air temp input
c. RPM inputs
d. Dyno Type and applied load or mass of roller

These will all make huge differences to the peak output number that you end up hitting.

Most of the 2871R cars I have tuned have been very hodge podge setups. Meaning the injectors were not correct make/model, injectors were leaking, ECU was damaged or not working correctly, boost was dropping off and not holding at all due to faulty or improperly installed boost controller.

I believe the 2871R cars usually produce lower outputs (Compared to all other tunes I have done) because the bottom mount 2871R crowd is one that is looking for the most cost effective options for the highest number. This means that many other solutions like fuel or other installation costs were also kept low for cost effective output. There needs to be careful decision making as a consumer who is really out for the best and most fulfilling setup in making the right decisions on cost and what demands and standards you keep your installers to.

http://www.youtube.com/watch?v=7i3JX18cGPs

One of the better 2871R cars I tuned was Jordan's - Jordan is extremely thorough and this shown through in the quality of his.
15-16 psi 100% stock motor with just a 2871R .64 with FMIC and PFC - we later found after Jordan left that we had the load set high on the dyno - so the car was actually reading about 12% or so less than it should have been.

Here are some things to assure you get the most of your 2871R Turbo, no matter what tuner you go to.

1. Buy the right supporting modifications

Most of the customers that I have that build high output SR20s build them with good supporting mods and have no leaks, no issues at all and all the high budget items have been purchased in the right places.

2. Make sure the shop that does/did your initial motor swap got you a high quality engine and did a thorough installation - including

A. SETTING THE CAS INTO THE HEAD PROPERLY - TESTING THE CAS!!!!! I can't tell you how many cars I have had in with damaged CAS or improperly punched CAS so the base timing target cannot be properly matched or hit. This is essential to properly tuning SRs. I have had cars from the highest and most well know shops (you would be blown away) with bad CAS, that were dynoed on dynojets wtih Baro correction on just to get them the numbers they wanted and out the door.

3. Make sure your boost controller and wastegate setup are effective solutions and hold boost stready all the way through the rev range. I also highly suggest all of you start investing in the ATP external WG integrated housing. I usually don't support shops that I don't have a great current working relationship but I think this is the solution to all the 2871R woes for perfect boost holding and performance of the wg.

4. Again make sure your ignition system is in good condition, your grounds are done correctly and your ECU is up to the task.
5. Invest in the right EMS. If you are serious about reliability and consistency seriously look into investing into a Haltech EMS.
AEM was not properly designed to work with the Nissan CAS and trigger wheel right out of the box and the steady state tuneability is not even close to efficiency as the HALTECH. Power FC is also a good option but I suggest going with Tomei Rytech - this unit is actually also made by the Haltech company (yep!) and is another great plug and play map based unit.

Map based means tuning for ignition, direct X timing for Y boost - on pressure, this means more power and more reliability for a turbo car that is setup for performance.

In the end the quality of the work you put into your own personal installs and the quality you demand from the shops that are frankly reaming a lot of you guys is what will make the dyno session and final output the best - give the tuner has experience and is familiar with your EMS.

Thanks and PM me for smaller qs ill try to get back if I have time

[moses]

Originally Posted by flamebag16

Looking for opinions, ideas, suggestions
I have s14 sr20det being fully built

Wiseco Pistons
Eagle Rods
Arp Head Studs
Arp Main studs
Balanced crank
Apexi Head Gasket
BC Springs/TI retainers
HKS s2 272s (intake/exhaust)


Was thinking bout running E85 but then would have to upgrade injectors, so i guess what im asking is how much power should i make on the 2871r pump gas (93) and now that motor is built to withstand much more power then 2871r will provide What other turbo options do i have

I want to rebuild the motor with pretty much these same mods, I just wanted to follow the 9000 rpm head page on nico. How much did it cost and did you do it yourself?

[s15specR]

I'm currently running the Tomei Reytec and like it a lot, great features plug and play, base map that it came with was almost perfect.

[S13 curtis]

the 30r comp housing had a big difference for my friend that tunes my car.
he has a 2871r.64 with a t4 gt30r comp housing. 300whp @ 10 pounds

i know its a different motor but he was on stock cams also.
heres the link.

www.ka-t.org :: View topic - 296rwhp on 9.5psi (vid inside)

[slider2828]

Got new numbers after Steve work his magic. Steve is hands down the best, any cars tuned, Ima send it his way.... I gotta say magic, cause the gains are disgustingly sick. A lt better than I thought..... Myfirst dyno was on the dynojet was on 93 with HKS264 Step1's and now Same setup same boostlevel at 16.5 (same as before) but with steve's tune and 91 gas.....

Its neck snapping fast geezus.... 200lbs of tq at 4000RPM

On a dyno dynamics, oh and still has a full cat with silencer stock IM and EXM.... I think that is enough or me.... Inspiration was Mine's 34 GTR, just focus on response....!

Geezus I also just notice 295 Lbs of Torque at 4800 RPM.... Get a neck brace time!

[91tofordee]

Originally Posted by OBEEWON

True, but where does that leave the .86 2871?

Anyone want a free turbo? LOL

yes i will take it off your hands

[civicsi2]

I had a .86, oil seal went bad. bought .64

Same dyno, maybe a year apart. Tuned for the .86.

300hp is old one, psi spiked at 19ish then dropped to 16-15ish. and this was an ebay manifold.

new 323hp is with stock manifold and psi hitting 16 and climbing to 17. aem shows hitting 16 at 3800rpm.

Ignore AFR's wideband and dyno were .5 off.

At 4kish it was 50hp gain and 70 lb ft. yes i know it could use some tuning, this was just a baseline.

Cams are HKS step1 256, yes i know i need something better but 320hp is good for right now. unless someone has some S3's to sell me.

[deukalionS14]

Originally Posted by slider2828

Got new numbers after Steve work his magic. Steve is hands down the best, any cars tuned, Ima send it his way.... I gotta say magic, cause the gains are disgustingly sick. A lt better than I thought..... Myfirst dyno was on the dynojet was on 93 with HKS264 Step1's and now Same setup same boostlevel at 16.5 (same as before) but with steve's tune and 91 gas.....

Its neck snapping fast geezus.... 200lbs of tq at 4000RPM

On a dyno dynamics, oh and still has a full cat with silencer stock IM and EXM.... I think that is enough or me.... Inspiration was Mine's 34 GTR, just focus on response....!

Geezus I also just notice 295 Lbs of Torque at 4800 RPM.... Get a neck brace time!

damn bro good job!! one day mine might come out like that hehe

[drifter_for_life06]

Originally Posted by idahotuner

you wouldnt be talking about my car would you?

gt2871r .64, 264 cams, greddy intake, Mr exhust and o2 740cc z32maf

No wasnt referring to your car. Was talking about a local friend here in Pennsylvania. Impressive tho, is that at 21psi?

[jakerps13]

408HP/382TQ Mustang Dyno

56trim .82 T3, log manifold, 38mm external gate, HKS 272 step 2's. Peak to 19psi and end off at 16psi on shitty tune.

[flamebag16]

Originally Posted by moses

I want to rebuild the motor with pretty much these same mods, I just wanted to follow the 9000 rpm head page on nico. How much did it cost and did you do it yourself?

bout $1500 in parts $900 for machine work and assembly, did almost everything myself except putting block together didnt want to deal with gapping rings and shit

[S13 curtis]

Originally Posted by jakerps13

408HP/382TQ Mustang Dyno

56trim .82 T3, log manifold, 38mm external gate, HKS 272 step 2's. Peak to 19psi and end off at 16psi on shitty tune.

looks like you have the crown in this thread.
im going with 272 cams like you.
jus wait till you get a better tune and 24 psi.
thats about 430whp on the dynojet if im correct.
nice #'s BTW
what were your previous # with the T2 .86

[GabeS14]

For all the Power FC users:
found this thread with free database maps with users uploading their maps, i guess you can find the setup similar to yours and there you have a free map.

original thread is from Freshalloy.com so i copied the OP's post into my own thread.
http://zilvia.net/f/engine-tech/2486...base-free.html

[slider2828]

Thanks gabe... good looking out!

[deukalionS14]

So mi done dealing with McKinney motorsports and JWT. I'm going to Canyon Racer Motorsports for my rebuild and Steve for my tune.

My mods are:
GT2871r .64
740cc TOMEI injectors
Megan Ex. Mani (going back to stock)
BC 264/264 cams
JWT tune
and some other minor things.

Michael said that he can do the rebuild and he seems like a really great guy. more for the love of it kind of person.

I hope do to with 9.0:1 compression pistons this time with a full rebuild head and block (replacing whatever is worn) and for a tune im going with Power FC L-Jetro for Kouki S14 SR and it will be tunes by the hands of Steve!!

muahahaha...i came back from iraq and my car turned to shit! but this time I will go to the right shop that wont miss anything and will put everything they have into my motor.

I'm not sure what i can get on a DynoDynamics dynometer but i will post up once things are done.