GT2871 USERS. SR motor

[GabeS14]

Originally Posted by slider2828

Thanks gabe... good looking out!

No problem, I had been looking for Power FC help everywhere but no luck,It is running on a base tune, and right now I dont have the cash to go to a real tuner so when i found this info i was sure to share with you guys on thie thread, i know most use PFC, most are already tune but I am sure a lot are still in process of building so the info is there.

[S13NismoStyle]

Heres my dyno from yesterday. It seems pretty low. Im pretty sure i have an problem with ignition, I first thought it was plug gap. first run was ngk brk7e .030 gap, second run was .027 gap. what do you guys think is causing the choppy graph after 6k. I think that might be effecting my peak hp.

336.75hp / 326.79tq on a dynojet

heres my setup:
2871r .64 (52 trim) @ 19psi
BC 264's with springs and retainers
Sard 850cc
Stock intake and exhaust manifolds
Enthalpy tuned ecu
turboxs mbc
afr's were 11.4-11.8 underboost



It seems like my tq curve is dropping off very quickly compared to the other dynos ive seen. What might cause this?

Also, my turbo is fully spooled a little later than 4k and thats seems later than most people running the same setup.

I dont know if this plays a part with the tq curve, but i did have my cams degreed by a friend and my intake cam had to be advanced 13 degrees. (hopefully it was done correctly) Would an imporperly advanced intake cam have anything to do with my torque curve dropping off like that?

[jspaeth]

Getting ready to take the plunge and add Greddy Intake Manifold, Metal HG, and some Cams, springs, and retainers.

How do you guys feel about pairing the Brian Crower Springs/Retainers with the 264/264 HKS Step 2 Cams (12/11.5 mm lift)???

The Crower Cams are 12 mm lift, so I figured they should be the right spec for the HKS cams, which have similar lift.

Those HKS Cams seem similar to the S3's, but with a little longer duration and a little more lift.....

Thoughs?


ALSO:

I contacted my tuner (Jeff Evans, who is really an expert tuner).....he suggested maybe doing 264 In 272 Ex


But most of what I've read says 272 is way too large for a 0.64 A/R 2871R.....thoughts?


Just looking for perfect recommendation of cams/springs/retainers to pair with that intake mani and 0.64 A/R and want the springs to work with the cams...

Also, here's my dyno sheet AS OF NOW (GT2871R, 740ccs PFC D-Jetro, 3 inch exhaust, 3 inch downpipe, turbo elbow, etc.....):

EDIT: Oh yeah this was at 17 psi on a Dynapack

tp://makingapril.com/greg/justin/2871rdyno.JPG

[S13 curtis]

i dont know how much power i make but i beat a car that traps 112mph in the quarter with stock cams and 14psi

[WDBDYSIL]

I finally got my car on the dyno this morning (will upload graph once i get back home) and was able to put down 348hp and 333tq at 18psi.

I was very happy with the #'s :S!

However, i've noticed a couple times in higher gears ill have a blast of knock out of nowhere.. so now i've gotta search the map for where its happening..

zenki s14 sr20
740 cc's
gt2871r .64
greddy elbow
not sure about the exh mani and dp, but both are very high quality
full 3" exhaust
ras
power fc d-jetro

Basic mods I guess.

BTW, the base tune + a bit of added fuel was only putting down 268hp 250tq, so the dyno tune was very worth it!

[S13 curtis]

Originally Posted by WDBDYSIL

I finally got my car on the dyno this morning (will upload graph once i get back home) and was able to put down 348hp and 333tq at 18psi.

I was very happy with the #'s :S!

However, i've noticed a couple times in higher gears ill have a blast of knock out of nowhere.. so now i've gotta search the map for where its happening..

zenki s14 sr20
740 cc's
gt2871r .64
greddy elbow
not sure about the exh mani and dp, but both are very high quality
full 3" exhaust
ras
power fc d-jetro

Basic mods I guess.

BTW, the base tune + a bit of added fuel was only putting down 268hp 250tq, so the dyno tune was very worth it!

stock cams?

[WDBDYSIL]

^ yes stock motor!

[sbanzer123]

just got my car tuned saturday.
s14 sr20
apexi hg stock thickness
cp pistons 9:1 comp
2871r .64ar
tomei 740cc
greddy intake
megan exaust mani
megan elbow
jim wolf sc cams
p2m ras
aem ems
speed density



on a dynapack. im pretty happy with the numbers, and the car feels solid.

[garagelu]

Just got my car retuned at Monkeywrench Racing this past saturday. They use a dynapack there.

Garrett 2871r .64
Nismo 740cc injectors
Nismo FPR
Walbro 255
JWT C1 cams and valve springs
Stock s13 bottom end with s14 sr head
ARP studs and Apexi 1.2mm head gasket
Head was decked with about .005 off
Z32 MAF
DC Sports exhaust manifold
HKS EVC 6 BC
NA s14 60mm TB
Apexi Power FC

hp against uncorrected torque (corrected number is 352 tq)



hp against boost

[OBEEWON]

I have yet to see a .86 over 400. I plan to fix that or set my car a-blaze.

[garagelu]

I also have not seen a car without jwt cams hit 400. And this is in reference to forums and people I have talked to. I only know of one person locally and he hit 400 with toda cams.

Now I know why jwt cams are so great. Good powerband and makes more torque than other cams. But the big question is whether it is worth the 600 dollar price tag?

[S13 curtis]

Originally Posted by garagelu

Just got my car retuned at Monkeywrench Racing this past saturday. They use a dynapack there.

Garrett 2871r .64
Nismo 740cc injectors
Nismo FPR
Walbro 255
JWT C1 cams and valve springs
Stock s13 bottom end with s14 sr head
ARP studs and Apexi 1.2mm head gasket
Head was decked with about .005 off
Z32 MAF
DC Sports exhaust manifold
HKS EVC 6 BC
NA s14 60mm TB
Apexi Power FC

hp against uncorrected torque (corrected number is 352 tq)



hp against boost

Fucking sweet!

im shooting for 450whp with my 2871r .64

im going to be on meth injection and around 26 psi.

[s13envy]

Originally Posted by OBEEWON

I have yet to see a .86 over 400. I plan to fix that or set my car a-blaze.

I had to be over 400whp on my .86. whenever i dynoed it, i was down on power and made 378whp. I know i was down on power b/c I've never seen a 240sx under 400whp trap 128 in the 1/4mile like mine did. I've got vids and times slips for proof if needed

[garagelu]

Originally Posted by S13 curtis

Fucking sweet!

im shooting for 450whp with my 2871r .64

im going to be on meth injection and around 26 psi.

Good luck with that. Check out my dyno and see how the powerband drops off after 7000 rpm. I've pretty much maxed out that turbo. Shooting for 450hp is so pointless on a 2871r. Go to a gt30 or something.

And just a note, I highly doubt you will hit 450hp on a 2871r. And if you do, let me know and I will be very impressed.

[S13 curtis]

Originally Posted by garagelu

Good luck with that. Check out my dyno and see how the powerband drops off after 7000 rpm. I've pretty much maxed out that turbo. Shooting for 450hp is so pointless on a 2871r. Go to a gt30 or something.

And just a note, I highly doubt you will hit 450hp on a 2871r. And if you do, let me know and I will be very impressed.

meth injection buddy did u not read.

and the air temps will be way cooler 26 pounds is possible with a 2871r on meth.

shit u see stock 16gs run 30 pounds only because of the meth injection makes it air temps way cooler instead of the turbo making hot air.
and if you were using meth injection you will make way more then that 401whp and be able to boost over 22psi effeciently





and shit like this is what im talking about:
http://www.honda-tech.com/showthread.php?t=2035882

i know its a different motor but it is a 1.8 and it shits on our dyno results with the same turbo. and its on a dyno dynamics.

i seriously think our motors should easily put down over 330whp without cams.

[JacksonBrown]

I'm also about to pull the trigger on a 2871 .64

However, I'm doing it a bit different than most I've seen here, in terms of fuel:

E85

I have an S14 SR
ProEFI
FMIC
dp
turbo elbow
Apexi 3" exhaust
bone stock motor
walbro 255

I want to get 350whp/33x tq at the lowest psi possible.
As I live in the Phoenix area, it gets 110+ degrees here, hence running the E85. I can get ethanol for $1.84/gallon here and get 55 gallon drums of it. Summer is around the corner, and, while pump gas is inexpensive now, it won't be pretty soon. E85, as it's 15% gasoline, will be somewhat affected by summer prices, but nowhere near pump.

With the stock T28, I have Sard 550's and Sard FPR, but to support the E85 I'm going Sard 850's. My tuner, Jason Siebels (owner of ProEFI and ex-AEM software engineer/tuner of AEM EMS) has advised me that the 850s will be sufficient for the psi/power I will be going after with this set up.

My last car was a 400whp z33, so I've been itching to get close to the power. 350whp/33x tq will feel like the z33, I think, as it's ~500lbs lighter (I have a 95 S14 SE). Of course the torque/displacement can never match that of the Z33, but overall, this set up will bring a smile to my face everyday..

[garagelu]

Originally Posted by S13 curtis

meth injection buddy did u not read.

and the air temps will be way cooler 26 pounds is possible with a 2871r on meth.

shit u see stock 16gs run 30 pounds only because of the meth injection makes it air temps way cooler instead of the turbo making hot air.
and if you were using meth injection you will make way more then that 401whp and be able to boost over 22psi effeciently





and shit like this is what im talking about:
DYNO: E85, GT2871r, 84mm gsr, b16head - Honda-Tech

i know its a different motor but it is a 1.8 and it shits on our dyno results with the same turbo. and its on a dyno dynamics.

i seriously think our motors should easily put down over 330whp without cams.

I think you are the one who isn't reading. To make 450 with a 2871r and even with meth you will have to run at least 26-27 psi I am estimating. Yes meth will allow you to run the setup with a safety barrier but I still wouldn't run a 2871r to reach a 450hp goal. It just doesn't flow well that high up.

Do what you want but I doubt you will hit 450 with a 2871r and meth.

And that guy on honda-tech is running a T3 2871r not a T2 2871r like the majority of us.

[guitaraholic]

...I am looking at getting a new turbo (still stock T28for now), and the 2871r .64 looks to be the best option I am looking for. It has awesome response and is good for the occasional 400hp run. Its going to be 6-8 months before I get it so here's my question.

Before I upgrade to that, I have a spare S14 head that I am going to P&P, valves deshrouded, and swain coated. But before I do that I need to make a choice on what type of manifold (so I can port match the head to the manifold). Would I be able to get more response and better boost figures with an external wastegate?

With an internal WG I have heard that you can get around 20psi, maybe a little more, but you also lose some top end on the internal because it can't flow enough. I don't think that would be a problem with an external (correct me if I'm wrong)

[llteddy4playll]

If you look at the back pages hitting 450whp on an .86 is possible at 23psi with 50/50 race gas. But good look on hitting 450whp on a .64.

[idahotuner]

there is to much back pressure on the t2 gt2871 .64 to make 450. i made 416 at 24 psi, and am now rebuilding my motor lol

you can say good by to pistons with it.

[jspaeth]

Originally Posted by idahotuner

there is to much back pressure on the t2 gt2871 .64 to make 450. i made 416 at 24 psi, and am now rebuilding my motor lol

you can say good by to pistons with it.

Can more people with ~400 whp 0.64 A/R setups verify this......will the motor hold up with 400 whp or so coming off this turbo setup?

Obviously it depends on how often you use that power, but just looking for some comments on that last post

[fc3sace]

My mods:

GT 2871R .64 16lbs of boost
Stock intake/ exhaust manifold
Buddy Club Spec II Exhaust
FMIC/ HKS SSQ
Apexi PFC D-JETRO
Brian Crower 264/ Stock valve train
Cosworth Metal Headgasket

MADE around: 330hp/ 290ft lbs of tq

[slider2828]

330 On a dynojet?

[fc3sace]

Made 330 on a dyna-pak.

[OBEEWON]

Sheesh this turbo sucks.

And not in the good way...like sucking alot of air in...they suck badly...

...they suck cuz people are making booty power. In 27 pages Ive seen 1 or 2 people make anything worth the money I spent...

[tmsilvia]

I just dyno my s14 yesterday... Here is the set up

Stock s14 motor
Full race minifold
Gt2871 .86
Tomei cam 270/270
Power fc d-jet
850cc sard injectors

I made 390hps on dyno dynamics at 18psi
Any question u could email me at [email protected]

[slider2828]

Wow that is great on a dyno dynamics.... Got dyno sheet to look at?

[tmsilvia]

http://i452.photobucket.com/albums/q...a/58ad3605.jpg

the car should make over 400hps on dyno pack

[JacksonBrown]

Originally Posted by OBEEWON

Sheesh this turbo sucks.

And not in the good way...like sucking alot of air in...they suck badly...

...they suck cuz people are making booty power. In 27 pages Ive seen 1 or 2 people make anything worth the money I spent...

What, in your opinion, is the turbo worthwhile then?
Stock manifold, stock motor, ~$1000 and it makes over 100whp over stock motor, not sacrificing low end power. Please tell us what turbo can accomplish all of this criteria if you have something objective to add to the thread.

[slider2828]

Yeah I got mine tuned on a dyno dynamics.... That is why I asked

What is up with the Torque numbers? something is not right there as the TQ never crosses HP? That is really weird... Also he has some type of weird smoothing.... Might wanna double-check on that....

Originally Posted by tmsilvia

http://i452.photobucket.com/albums/q...a/58ad3605.jpg

the car should make over 400hps on dyno pack