GT2871 USERS. SR motor

[codyace]

Originally Posted by frsh4

Nice^^^. Been looking somebody running stock internals with a GT2871. Looking to do something similar and get 300hp.

I ran the setup for a long time, and probably still would be on the stock pistons if I didn't have an intake manifold gromet spout up causing instan-lean on a cylinder. Stock bottom end more than sufficient for 400 whp.

...with that said, if you've got the cash, throwing a set of forged CP's in there (on stock rods, totally fine) isn't a bad idea in terms of reliability. One bad tank of gas could be the difference in chipping a stock piston, so the Forged piston is 'cheap insurance' sort to speak

[frsh4]

Originally Posted by codyace

I ran the setup for a long time, and probably still would be on the stock pistons if I didn't have an intake manifold gromet spout up causing instan-lean on a cylinder. Stock bottom end more than sufficient for 400 whp.

...with that said, if you've got the cash, throwing a set of forged CP's in there (on stock rods, totally fine) isn't a bad idea in terms of reliability. One bad tank of gas could be the difference in chipping a stock piston, so the Forged piston is 'cheap insurance' sort to speak

Ya thanks for the advice. Definitely wanna get minor head and block parts when possible. Like stated before im fine with 300whp, its just a street car.

[nismoninjagtr]

Originally Posted by frsh4

Ya thanks for the advice. Definitely wanna get minor head and block parts when possible. Like stated before im fine with 300whp, its just a street car.

i'd think to go with an s15 gt28r for a 300-330whp street car it's a really fun/instant boost turbo

[badbob2121]

Originally Posted by frsh4

Nice^^^. Been looking somebody running stock internals with a GT2871. Looking to do something similar and get 300hp.

its runs like a stock sr too, just with 100 extra whp...lol, i had the tune altered before it left the dyno for 93 octane

so now on 93 octane im running 18psi and should be pushing a little over 300whp

i couldnt be happier with the current set up

[nismoninjagtr]

Originally Posted by EsChassisLove

Nice we have basically the same set up. I just have wiseco 87mm pistons (can't remember if that's .020 or .040 over) and I have stock cams. Hopefully I'm close to your numbers! Will make me very happy lol

Edit-Although I don't think my exedy hypersingle will be able to take that power. We will see.

The Exedy Hyper Single Clutch Kit will work for an SR20 clutch holding capacity is 500hp, my clutch is only rated 420 somethin whp it's the weakest link in my mods... :/

[tabasco122]

any clutch that is rated by HP is bullshit. clutches are rated by tq

[nismoninjagtr]

Originally Posted by tabasco122

any clutch that is rated by HP is bullshit. clutches are rated by tq

eh it's a six puck sprung hub it locks solid and been in use since jan 2010 it's held so far so i'm ok with it

[tabasco122]

just saying, clutch ratings go by torque. try to find the torque rating for the clutch.

[nismoninjagtr]

Originally Posted by tabasco122

just saying, clutch ratings go by torque. try to find the torque rating for the clutch.

391ft/lb i guess it's not that bad...

[tabasco122]

yeah, doubt you will hit that on a 2871.

[silversr]

Enthalpy sent me two more tunes which was nice of him... but the car still is still at 10-11 afr at idle and cruising. I mean, when you first start the car it runs 14 afr for a few seconds then it goes back to 10afr. It feels a little better @ WOT but I just hate the fact that its 10-11afr while idling and cruising.

I guess I should start saving for a standalone.

[EsChassisLove]

Check the wires from both the o2 sensor and the widebands sensor.

If either wire gets too hot, it somehow fucks with the current flowing through the wires and causes it to go hay wire.

Happend to me. I wasted so much time and money on a wire that was too close to my engine block...so dumb.

I'm assuming you've checked all your fuel pressure also?

[codyace]

Originally Posted by silversr

I guess I should start saving for a standalone.

Have you tried talking with Enthalpy? No offense but this far into the game, I doubt their tune s fubar

[2forty]

Originally Posted by silversr

Enthalpy sent me two more tunes which was nice of him... but the car still is still at 10-11 afr at idle and cruising. I mean, when you first start the car it runs 14 afr for a few seconds then it goes back to 10afr. It feels a little better @ WOT but I just hate the fact that its 10-11afr while idling and cruising.

I guess I should start saving for a standalone.

Same thing happened to me AND my cousin. Sorry to hear that it happened to someone else.

[Creeper]

Has any of you tried Toda Racing Cams 264/264 lift 10.5mm? Just curious since I know someone who's selling a pair. I was gonna buy them but I have no experince with Any Toda Racing products out there. Im building my Sr since I recenty bought a Gt2871R .64 A/R. I want to hit 400 whp.

[codyace]

Toda cams should get you there, just need to ensure the rest of the setup is good!

[Creeper]

Lol sorry i went out in a rush since my dog was barking at me since he wanted a walk around the neighborhood, Here's the setup Im going with. Any suggestions giving will be greatly appreciated.

Garrett Gt2871R .64 A/R.
Toda Racing Cams 264/264 lift 10.5mm
Supertech Dual ValveSprings & Titanium Retainers
Megan Turbo Manifold with Megan Elbow *HeatWrap*
GodSpeed Front Mount Intercooler w/ Piping
Sard 850cc Injectors
Megan Cam Gears
Walbro Fuel Pump
Greddy Rocket Arms
Greddy Intake Manifold
Greddy Adjustable wastegate
Greddy profec B2
Greddy BOV
Q45 Throttle body
N62 MAF
NGK bkr6e spark plugs
Cosmetic Headgasket
ARP headstud
3" Downpipe
91oct Gas

*Still debating to were to send my ecu, any suggestions guys?

[Walperstyle]

^I wouldn't get an ECU flash, I'd get a proper management system. Vipec>Motec>Haltec>AEM in that order (IMO).

Basically whoever is doing your tuning, take it to him and ask him what management he wants to use. AEM has lots of internet support, but Vipec units have some amazing auto tune features. See Youtube.

[silversr]

Alright, I should've waited until this weekend before I posted that. I need some time to diagnose some things because the tune he sent me was exactly my old tune. I will check the 02 sensors, mafs, plugs and make sure there isn't any leaks. I will keep you updated.

[Silverbullet]

This prob has been covered numerous times in the thread already. I've always been a 2560R fan and never really looked at 2871R's. From some dyno graphs posted, i appears setups with stock cams and stock intake manifolds are pretty much restricted to 300-320whp?

Originally Posted by tabasco122

any clutch that is rated by HP is bullshit. clutches are rated by tq

Finally. This is the first time i've seen this on the internet =D Kudos.

[tabasco122]

went to the track the other day and got a pretty decent run with my stock turbo. now its time to find a 2871 and complete my setup and see what i do.

13.7@103 with a 2.1 second 60ft on street tires with an open diff. not bad for my first time ever dragracing...

[Creeper]

I will take a look for a AEM management system but you think I will be close to 400 whp. Is there any other thing I need to accomplish my goal?

[EsChassisLove]

Originally Posted by Silverbullet

This prob has been covered numerous times in the thread already. I've always been a 2560R fan and never really looked at 2871R's. From some dyno graphs posted, i appears setups with stock cams and stock intake manifolds are pretty much restricted to 300-320whp?


Finally. This is the first time i've seen this on the internet =D Kudos.

no. You can reach 350+ with a stock head.

[Luvs2slide]

Is there big differences/gains in using the 52 trim vs the 56 trim compressor housings?

[TFD]

@Creeper: I run those cams on my 2871 .86 turbo.

Benefit is that the air the turbo is pumpin at high boost (1.4 bar) is actually getting into the engine instead of being restricted by the oem cams. I like them and stockish idle.

[BlackZenkiS14]

Originally Posted by Walperstyle

^I wouldn't get an ECU flash, I'd get a proper management system.

I'd like Cody to clarify this comment for me. Is there any truth to it?

[tabasco122]

Question, whats the max amount of boost this turbo can handle? i see most people run between 20-22 psi, is that because its the max efficiency of the turbo, or is it limited elsewhere. IE if i ran e85+meth could i safely run higher boost?

im just looking at options and wondering if its worth moving to top feed msd injectors instead of trying to find some sard or nismo 750's

[GabeS14]

Originally Posted by Creeper

*Still debating to were to send my ecu, any suggestions guys?

I sent you a pm, my ECU is tuned for the same parts you have currently instaled...

A JWT or similar ecu tune will be perfect, read some of the thread and you will see cody made his 400 hp on a ecu tune. not a stand alone
you are not able to get that much more power by getting a stand alone unit, hell,, you might actually even get less if your tuner is not that great.
you will be fine with JWT or similar tuners, no need to go spend $1000's for a stand alone, then a few more hundred to get it tuned....
if your not competing in pro races or pushing 450+ whp.

[silversr]

I take back what I said about my enthalpy ecu. I checked the mafs plug and the wires were corroded . I ordered a new plug and everything is fine now. I repeat nothing was wrong with the tune and Im an idiot.

[Patrick Bowering]

Originally Posted by silversr

I take back what I said about my enthalpy ecu. I checked the mafs plug and the wires were corroded . I ordered a new plug and everything is fine now. I repeat nothing was wrong with the tune and Im an idiot.

Props for honesty and making it clear that it was not their fault.

and as for setups the things i regret in mine are the freddy intake it just doesnt help response. and staying with nismo side feeds no more side feeds for me. bosch ev14s cheap and awesome.and no 3 inch intercooler piping.