GT2871 USERS. SR motor - Page 74 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

WhiteS12+1 · 09-15-2011, 02:58 PM

Quote:

Originally Posted by codyace

What springs/setup are you running?

As before, S3's and OEM are safe to 7850 without any issue (well any JWT cam is for that matter, this side of the C series)

Supertech Valve Springs, retainers, +1mm valves, rocker arm stoppers..

BiG MiKE86 · 09-16-2011, 06:18 AM

Quote:

Originally Posted by codyace

I'm looking to switch to the HL cams here shortly

Higher lift should certainly help in all aspects of the 2871r powerband.

Have you seen any numbers on these cams yet?

tabasco122 · 09-16-2011, 11:31 PM

cody i have a question, would the exhaust housing with the 44mm external wastegate (.72ar) also be a viable option if one didnt want to modify the exhaust mani?

EDIT: nevermind, looking at it the wastegate flange is on the wrong side of the turbo.
EDIT2: nevermind, im dumb, it would work, just wondering if its viable.

MrFairlady · 09-25-2011, 07:47 PM

So,with what boost I'd like to run (18psi+/-)setup:
2871 .64 ,256 Poncams, Apex'i HG,BC valvetrain,Tomei FPR, Z32 maf
Enthalpy Tune (once I decide inj size)

What Size Injectors should I run - 740cc?
will 555's be safe or to close to Full duty???

I'd love about 350+/-whp,...possible with this setup?

cotbu · 09-25-2011, 10:27 PM

You can do 350hp with 555cc injectors. Don't let anyone tell you different. It's all in the tune. but why pigeon hole yourself? You'll be worrying about over boosting and anything related to bad fuel quality. I know I did. Knowing the weakest link was my injectors. I opted for the sard 850's. So get the 740 injectors, They seem to be the go to injectors anyway. That would also stop the massive flaming I'll get for saying 555cc's are good for 350hp

You'll most likely be using that retune service Enthalpy Offer's, so have a way to datalog those AFR!

EsChassisLove · 09-25-2011, 10:32 PM

Does SARD make a 740cc inj? I see nismo and HKS does but I'm not feeling spending $700 on them.

tabasco122 · 09-25-2011, 10:51 PM

i think ive seen 850cc sards before.

EsChassisLove · 09-25-2011, 10:53 PM

SARD has 850s. For about $500.

tabasco122 · 09-25-2011, 10:53 PM

just go topfeed?

boniomario · 09-25-2011, 11:07 PM

Quote:

Originally Posted by EsChassisLove

Does SARD make a 740cc inj? I see nismo and HKS does but I'm not feeling spending $700 on them.

you know the cheapest I've found the HKS injectors are $550 on amazon for all 4 of them you just got to search a little

here I even posted the link for you no let all the good karma in the world come to me wait this is not reddit LOL

1 -

HKS 740cc Injectors - Nissan SR20DET

2-

I can't find the amazon link right now but that's where i got mine from for $560 shipped all together

boniomario · 09-25-2011, 11:12 PM

HKS 740cc Fuel Injectors Side Feed High Impedance SR20 KA24 on eBay!

DeatschWerks SIDE FEED Injectors 810cc 240SX NIS1-810-4

S13 curtis · 10-01-2011, 06:03 PM

Quote:

Originally Posted by tabasco122

cody i have a question, would the exhaust housing with the 44mm external wastegate (.72ar) also be a viable option if one didnt want to modify the exhaust mani?

EDIT: nevermind, looking at it the wastegate flange is on the wrong side of the turbo.
EDIT2: nevermind, im dumb, it would work, just wondering if its viable.

Yup it works, I belive im the only member on this board to do it. Its not expensive at all to make it work either. My thread will help you to do it if your interested.

http://zilvia.net/f/tech-talk/298993...ind-out-9.html

Ralliart4 · 10-04-2011, 11:57 AM

Quote:

Originally Posted by MrFairlady

So,with what boost I'd like to run (18psi+/-)setup:
2871 .64 ,256 Poncams, Apex'i HG,BC valvetrain,Tomei FPR, Z32 maf
Enthalpy Tune (once I decide inj size)

What Size Injectors should I run - 740cc?
will 555's be safe or to close to Full duty???

I'd love about 350+/-whp,...possible with this setup?

It is doable sir and can be done... I have run 340whp/357lbft @ 1.3bar on 550cc jecs injectors with some concious and reliable advice to 'bandaid' and run additional fuel pressure.

Suddenly 550cc turned into 630cc which made all the difference and even at 550cc never had a hit of knock.

Luvs2slide · 10-18-2011, 01:23 AM

Thank You so much CA for helpin a brotha out!!!!

Jasonx63 · 10-18-2011, 01:54 AM

hey guys i have finally finished my setup and got it running well and was wondering if anyone can give me a ball park to what my whp would be. Also where would be a good place to get it tuned in California once im ready to get some dyno time to fine tune it. My goal is 350-400whp

Setup: (91 oct)
forged pistons(i believe super tech)
metal head gasket
BC Stage 2 cams(264/264)
GT2871r .86
Greddy Manifold
740cc Denso
Z32 MAF
EFI specialist tune
3" exhaust
Isis Screamer Dump(wondering if this is why my turbo isnt AS responsive as other setups)
Greddy RAS

idahotuner · 10-18-2011, 09:19 AM

C

Quote:

Originally Posted by Luvs2slide

Thank You so much CA for helpin a brotha out!!!!

Those are some nice welds. Don't you think you should have opened it up to both runners all the way. Since youhave that crack and the little hole any how. Looks nice though. I am sure it will still bebetter then stock

S13 curtis · 10-18-2011, 09:24 AM

Quote:

Originally Posted by Jasonx63

hey guys i have finally finished my setup and got it running well and was wondering if anyone can give me a ball park to what my whp would be. Also where would be a good place to get it tuned in California once im ready to get some dyno time to fine tune it. My goal is 350-400whp

Setup: (91 oct)
forged pistons(i believe super tech)
metal head gasket
BC Stage 2 cams(264/264)
GT2871r .86
Greddy Manifold
740cc Denso
Z32 MAF
EFI specialist tune
3" exhaust
Isis Screamer Dump(wondering if this is why my turbo isnt AS responsive as other setups)
Greddy RAS

The screamer pipe does NOT do anything to the responsiveness. Also I think its better to run the mafs blow thru. The BC Cam is kind of a bottle neck, besides that i think you should be in the 370+ range on 91oct full tilt.

Jasonx63 · 10-18-2011, 11:59 AM

Quote:

Originally Posted by S13 curtis

The screamer pipe does NOT do anything to the responsiveness. Also I think its better to run the mafs blow thru. The BC Cam is kind of a bottle neck, besides that i think you should be in the 370+ range on 91oct full tilt.

What do you mean by bottle neck do think I should go back to stock for now? And BTW I am running 18pounds or 10 if I'm just Cruising?

cotbu · 10-18-2011, 01:34 PM

I'd probably make a decision on that hole and crack before install. That chunk could potentially kill your turbo. Not everyone's build plans include a cyanide pill!

idahotuner · 10-18-2011, 01:36 PM

I like my BC 264 cams

Luvs2slide · 10-18-2011, 02:29 PM

Quote:

Originally Posted by cotbu

I'd probably make a decision on that hole and crack before install. That chunk could potentially kill your turbo. Not everyone's build plans include a cyanide pill!

SUpposedly the crack is normal... I am kinda thinking about dremeling it out though...probably the extrude hone material took alot of material away also.

copmagnet · 10-18-2011, 07:47 PM

Quote:

Originally Posted by Jasonx63

hey guys i have finally finished my setup and got it running well and was wondering if anyone can give me a ball park to what my whp would be. Also where would be a good place to get it tuned in California once im ready to get some dyno time to fine tune it. My goal is 350-400whp

Setup: (91 oct)
forged pistons(i believe super tech)
metal head gasket
BC Stage 2 cams(264/264)
GT2871r .86
Greddy Manifold
740cc Denso
Z32 MAF
EFI specialist tune
3" exhaust
Isis Screamer Dump(wondering if this is why my turbo isnt AS responsive as other setups)
Greddy RAS

Greddy manifold will slow down spool time slightly. .86 hotside on that turbo will slow down spool. 264 cams will raise your powerband slightly. That's probably why you've lost a little response.

usdm180sx · 10-18-2011, 09:14 PM

Quote:

Originally Posted by copmagnet

Greddy manifold will slow down spool time slightly. .86 hotside on that turbo will slow down spool. 264 cams will raise your powerband slightly. That's probably why you've lost a little response.

Get the n15 throttle 70mm body it will compensate for some of the lag

S13 curtis · 10-19-2011, 02:31 AM

Quote:

Originally Posted by Jasonx63

What do you mean by bottle neck do think I should go back to stock for now? And BTW I am running 18pounds or 10 if I'm just Cruising?

Well, there are better cams out there that will net you more power. I've also herd of bad BC cams that dont put out much power and need cam gears.

Quote:

Originally Posted by idahotuner

I like my BC 264 cams

From what I see, sometimes people get a good pair and some get awful ones. Sometimes they need to be degree'd, your's seem to have came out good.

tabasco122 · 10-19-2011, 02:53 AM

Quote:

Originally Posted by S13 curtis

Well, there are better cams out there that will net you more power. I've also herd of bad BC cams that dont put out much power and need cam gears.

From what I see, sometimes people get a good pair and some get awful ones. Sometimes they need to be degree'd, your's seem to have came out good.

according to the guys at enthalpy when i talked to them, it was only the 272's that had a bunch of batches that were cut wrong and needed cam gears to degree them correctly

180sxqc · 10-19-2011, 08:13 PM

Sup guys,

I was thinking of getting a stock manifold and the extrude-hone process but I cant find someone using this process around here...

has anyone tried porting the stock manifold? or any suggestions?

BlackZenkiS14 · 10-21-2011, 08:43 AM

Well, I got my newly tested Nismo 740cc injectors, Isis Z32 MAF, and freshly tuned JWT ECU installed, and it fired up the first time, but rough, real rough. Checked the wideband...maxed out at 10.0 on idle, and under light load.

Ran it around for a little bit, figuring it was just from fuel falling in the cylinders when I replaced the injectors. It got a bit better, but never cleared up.

So I checked the ground on the MAF, and cleaned it up better, that made little to no difference. Then I completely disconnected the body ground on the maf, and hte car seemed to idle fine...13.7-15.0 at idle, and light throttle. Which is weird, because it didnt do that at all until the ground was disconnected. :/ Then @7psi it would hang around 13.5ish which isnt terrible, but much leaner than I wanted to see. But I remember reading that it would run a bit lean under light boost like that. So I increased boost to 15psi, and it would read around 15AFR....not good. So I only did that once, and didnt try it again. Got back home, and tried grounding the MAF again while still running, it immediately got really rough, and went back to 10.0. FML.

Anyone have any help?

S13 curtis · 10-21-2011, 09:11 AM

^ you sure you got the right tune?

BlackZenkiS14 · 10-21-2011, 09:22 AM

I can only assume so, I sent JWT the specs, and my factory ECU. The invoice says 740's and Z32, so I can only imagine that it was done correctly. :/

*slider2828* · 10-21-2011, 09:39 AM

How does the WG work when the engine torques? I have motor mounts and I tell you at 350+ HP, the engine torques no matter what...

Is there room to compensate for that?

-Ken

09-16-2011, 11:31 PM	#2193
tabasco122 Zilvia Junkie Join Date: Feb 2011 Location: Houma, LA Age: 32 Posts: 321 Trader Rating: (5) Feedback Score: 5 reviews	cody i have a question, would the exhaust housing with the 44mm external wastegate (.72ar) also be a viable option if one didnt want to modify the exhaust mani? EDIT: nevermind, looking at it the wastegate flange is on the wrong side of the turbo. EDIT2: nevermind, im dumb, it would work, just wondering if its viable. Last edited by tabasco122; 09-17-2011 at 12:03 AM..

09-25-2011, 07:47 PM	#2194
MrFairlady Nissanaholic! Join Date: Mar 2007 Location: Fascination Street,N.C Age: 42 Posts: 1,701 Trader Rating: (31) Rides Gallery: MrFairlady Feedback Score: 31 reviews	So,with what boost I'd like to run (18psi+/-)setup: 2871 .64 ,256 Poncams, Apex'i HG,BC valvetrain,Tomei FPR, Z32 maf Enthalpy Tune (once I decide inj size) What Size Injectors should I run - 740cc? will 555's be safe or to close to Full duty??? I'd love about 350+/-whp,...possible with this setup? __________________ z-tERty-2

09-25-2011, 10:27 PM	#2195
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 47 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	You can do 350hp with 555cc injectors. Don't let anyone tell you different. It's all in the tune. but why pigeon hole yourself? You'll be worrying about over boosting and anything related to bad fuel quality. I know I did. Knowing the weakest link was my injectors. I opted for the sard 850's. So get the 740 injectors, They seem to be the go to injectors anyway. That would also stop the massive flaming I'll get for saying 555cc's are good for 350hp You'll most likely be using that retune service Enthalpy Offer's, so have a way to datalog those AFR! __________________ LoverTechnologies "Half Broken Things!"

09-25-2011, 10:32 PM	#2196
EsChassisLove Nissanaholic! Join Date: Jan 2011 Location: San Diego Age: 32 Posts: 2,090 Trader Rating: (26) Feedback Score: 26 reviews	Does SARD make a 740cc inj? I see nismo and HKS does but I'm not feeling spending $700 on them. __________________ IG/TikTok-ThatS14_Z06guy

09-25-2011, 10:53 PM	#2198
EsChassisLove Nissanaholic! Join Date: Jan 2011 Location: San Diego Age: 32 Posts: 2,090 Trader Rating: (26) Feedback Score: 26 reviews	SARD has 850s. For about $500. __________________ IG/TikTok-ThatS14_Z06guy

09-25-2011, 10:51 PM	#2197
tabasco122 Zilvia Junkie Join Date: Feb 2011 Location: Houma, LA Age: 32 Posts: 321 Trader Rating: (5) Feedback Score: 5 reviews	i think ive seen 850cc sards before.

09-25-2011, 10:53 PM	#2199
tabasco122 Zilvia Junkie Join Date: Feb 2011 Location: Houma, LA Age: 32 Posts: 321 Trader Rating: (5) Feedback Score: 5 reviews	just go topfeed?

09-25-2011, 11:12 PM	#2201
boniomario Zilvia Member Join Date: Apr 2011 Location: Somewhere in this world Posts: 169 Trader Rating: (0) Feedback Score: 0 reviews	HKS 740cc Fuel Injectors Side Feed High Impedance SR20 KA24 on eBay! DeatschWerks SIDE FEED Injectors 810cc 240SX NIS1-810-4

10-18-2011, 01:23 AM	#2204
Luvs2slide Zilvia FREAK! Join Date: Oct 2006 Location: NW Florida Age: 39 Posts: 1,490 Trader Rating: (81) Feedback Score: 81 reviews	Thank You so much CA for helpin a brotha out!!!! __________________

10-18-2011, 01:54 AM	#2205
Jasonx63 Zilvia Member Join Date: Aug 2010 Location: Fresno Age: 30 Posts: 225 Trader Rating: (2) Feedback Score: 2 reviews	hey guys i have finally finished my setup and got it running well and was wondering if anyone can give me a ball park to what my whp would be. Also where would be a good place to get it tuned in California once im ready to get some dyno time to fine tune it. My goal is 350-400whp Setup: (91 oct) forged pistons(i believe super tech) metal head gasket BC Stage 2 cams(264/264) GT2871r .86 Greddy Manifold 740cc Denso Z32 MAF EFI specialist tune 3" exhaust Isis Screamer Dump(wondering if this is why my turbo isnt AS responsive as other setups) Greddy RAS

10-18-2011, 01:34 PM	#2209
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 47 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	I'd probably make a decision on that hole and crack before install. That chunk could potentially kill your turbo. Not everyone's build plans include a cyanide pill! __________________ LoverTechnologies "Half Broken Things!"

10-18-2011, 01:36 PM	#2210
idahotuner Zilvia FREAK! Join Date: Jan 2008 Location: St. Maries, Idaho Age: 32 Posts: 1,276 Trader Rating: (17) Rides Gallery: idahotuner Feedback Score: 17 reviews	I like my BC 264 cams __________________ My Twin Scroll Gt30r Sr22det Build

10-19-2011, 08:13 PM	#2216
180sxqc Zilvia Member Join Date: Sep 2009 Location: Québec, Canada Age: 33 Posts: 177 Trader Rating: (3) Feedback Score: 3 reviews	Sup guys, I was thinking of getting a stock manifold and the extrude-hone process but I cant find someone using this process around here... has anyone tried porting the stock manifold? or any suggestions?

10-21-2011, 08:43 AM	#2217
BlackZenkiS14 Nissanaholic! Join Date: Nov 2003 Location: "St. Chuck", MO Age: 35 Posts: 2,091 Trader Rating: (15) Feedback Score: 15 reviews	Well, I got my newly tested Nismo 740cc injectors, Isis Z32 MAF, and freshly tuned JWT ECU installed, and it fired up the first time, but rough, real rough. Checked the wideband...maxed out at 10.0 on idle, and under light load. Ran it around for a little bit, figuring it was just from fuel falling in the cylinders when I replaced the injectors. It got a bit better, but never cleared up. So I checked the ground on the MAF, and cleaned it up better, that made little to no difference. Then I completely disconnected the body ground on the maf, and hte car seemed to idle fine...13.7-15.0 at idle, and light throttle. Which is weird, because it didnt do that at all until the ground was disconnected. :/ Then @7psi it would hang around 13.5ish which isnt terrible, but much leaner than I wanted to see. But I remember reading that it would run a bit lean under light boost like that. So I increased boost to 15psi, and it would read around 15AFR....not good. So I only did that once, and didnt try it again. Got back home, and tried grounding the MAF again while still running, it immediately got really rough, and went back to 10.0. FML. Anyone have any help? __________________ -Kyle

10-21-2011, 09:11 AM	#2218
S13 curtis Zilvia Addict Join Date: Jun 2008 Location: Orlando,FL Age: 30 Posts: 651 Trader Rating: (13) Feedback Score: 13 reviews	^ you sure you got the right tune? __________________ 1990 240sx fast back SR20det GTXX71R Sips on E-85 1998 S14 Kouki KA24de Bone Stock...... 2004 Lancer Evolution

10-21-2011, 09:22 AM	#2219
BlackZenkiS14 Nissanaholic! Join Date: Nov 2003 Location: "St. Chuck", MO Age: 35 Posts: 2,091 Trader Rating: (15) Feedback Score: 15 reviews	I can only assume so, I sent JWT the specs, and my factory ECU. The invoice says 740's and Z32, so I can only imagine that it was done correctly. :/ __________________ -Kyle

10-21-2011, 09:39 AM	#2220
slider2828 Premium Member Join Date: Oct 2004 Location: San Francisco, CA Posts: 5,824 Trader Rating: (13) Feedback Score: 13 reviews	How does the WG work when the engine torques? I have motor mounts and I tell you at 350+ HP, the engine torques no matter what... Is there room to compensate for that? -Ken __________________ Turn and Burn!

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