GT2871 USERS. SR motor - Page 14 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

WoolyS14DET · 08-06-2008, 12:50 PM

Something def not right I think it should be a lil more then that at 16psi.

purekoryo · 08-06-2008, 09:54 PM

I used to have S3 cams on my old sentra with SR20DET. Does the JWT S3 cams drop right into the S13 SR20DET motors, or does the cams need to be modified a bit? specifically the dowel pin at the end of the cams. Did you have to get the JWT S3M cams?

WoolyS14DET · 08-06-2008, 09:59 PM

Quote:

Originally Posted by purekoryo

I used to have S3 cams on my old sentra with SR20DET. Does the JWT S3 cams drop right into the S13 SR20DET motors, or does the cams need to be modified a bit? specifically the dowel pin at the end of the cams.

I think the exhaust cam dowel pin needs to be longer ??

CAll Ben and JWT and ask him !!

fc3sace · 08-13-2008, 07:55 PM

I posted a previous thread with my first dyno pull with minor bolt ons: AFC NEO, Exhaust, and fmic Dynoed at 203 hp with 198ft lbs of torque

After obtaining some new parts:

Megan Elbow
Garrett 2871r .64 w/HKS actuator
Power FC D-Jetro
Tomei 740cc injectors
Nismo FPR
Walboro 255lph fuel pump

I managed to pull out 284 hp with 14lbs of boost (no boost controller)
I forgot what the torque was but ill post a pic of my dyno sheet later today.

LMK what u guys think... by the way its still on stock internals with stock headgasket.

purekoryo · 08-15-2008, 04:10 PM

I have decided on the JWT S4 Cams. I will install the following this Sunday.

GT2871r .64
JWT S4 Cams
740cc Nismo Injectors
Z32 MAF
Enthalpy ECU
Megan O2 housing with ebay 3" turboback exhaust

Does anyone have the same setup or have run S4's previously? From what I hear from sr20forums, S4's kick some ass. I've had S3 on my sentra B14 before with the GT2871r but with .86 housing, so that had some bit of lag. I wonder how much decrease in lag I will notice even with the S4's.

usdm180sx · 08-15-2008, 06:23 PM

damn, you got it backwards TWICE.

.64 trim = s3 cams
.86 trim = s4 cams

purekoryo · 08-16-2008, 06:14 AM

Have you tried both setups? You act like you did, and if you did and thought it was pretty bad, than that's great, I know now. But if you didn't I wouldn't say anything if I were you. At least I'm gonna try and see how that works out, as many people that do have JWT cams here go with S3's. As a matter of fact, many MANY sentra guys have sold S3's and bought S4's and never turned back. used S4's are hard to come by in sr20forum, but not S3's. As codyace mentioned they are easier to catch, and even used S4's are a bit more expensive than S3's for a reason. Many guys with the sentras run S4's in conjunction with T25 and T28 turbos all day. The guys with the T28's did not have any noticeable loss in power or lag with S4's.

So, again, have you tried those two combinations, if so, back it up with some details on your experience with them so that we can all learn. If not, you can learn from my experience, as I will post them after I install them.

Quote:

Originally Posted by usdm180sx

damn, you got it backwards TWICE.

.64 trim = s3 cams
.86 trim = s4 cams

usdm180sx · 08-16-2008, 09:04 AM

The powerband for the .64 and s3 cams are both mid range. The powerband for the .86 and s4 cams are for more top end. Your setup will work, but it's not optimal. I had the HKS GT-RS (basically the .64) on an s14 sr (w/nvcs) and ran HKS 256/264 cams (more mid range). Here's a dyno chart documenting my "experience:"

Ninjabread · 08-16-2008, 09:58 AM

so the consensus is basically that the .86ar sucks?

Damn, I was just about to buy one

s13envy · 08-16-2008, 12:48 PM

i dont think the .86a/r sucks at all!! I loved mine and would actually consider doing another one. buy the .86a/r b/c you'll want the extra power after you get used to the .64A/R. just my opinion

purekoryo · 08-17-2008, 05:57 PM

Just got the .64 installed. Wow it spools up much quicker than the .86 I had. I will install the jwt s4 cams next weekend and post the experience and then I may get it dynoed.

Oneoverwrx · 08-18-2008, 01:15 PM

only buy the .86 if you want to make power and go fast!!!!lol

WA_Sileighty · 08-18-2008, 03:45 PM

i can post my dyno sheet when i get a chance. I recently installed the .64 on my redtop. Liking it so far. Problem was that while he was trying to dyno it he could only get it to hold stable boost at around 14lbs. Anything higher and it would spike above 20. I was having him shoot for 17 psi when tuning it but ended up tuning it for 14. I just used the standard wastegate when i installed it, i figured my blitz spcid would handle the rest. I see alot of people using the HKS actuater though even if they have an ebc. would its adjustability help me with spiking issues?

anyotherone · 08-18-2008, 04:19 PM

Quote:

Originally Posted by Ninjabread

so the consensus is basically that the .86ar sucks?

Damn, I was just about to buy one

No, just figure out what you want more - topend or midrange

In my case I had the Full Race turbo manifold and my .86ar spooled more like a .64 so I got the best of both worlds.

"Good" or "best" are relative terms in this sort of decision. Are you going to drift? Autocross? Street daily driven? Drag or highway race?

I drove my car 95% street and 5% drag, so I went to the .86ar but used cams with better mid range to create a combo that I was really happy with.

usdm180sx · 08-18-2008, 05:31 PM

Quote:

Originally Posted by WA_Sileighty

i can post my dyno sheet when i get a chance. I recently installed the .64 on my redtop. Liking it so far. Problem was that while he was trying to dyno it he could only get it to hold stable boost at around 14lbs. Anything higher and it would spike above 20. I was having him shoot for 17 psi when tuning it but ended up tuning it for 14. I just used the standard wastegate when i installed it, i figured my blitz spcid would handle the rest. I see alot of people using the HKS actuater though even if they have an ebc. would its adjustability help me with spiking issues?

I had the same issues with my GT-RS which is exactly like the .64 with an HKS actuator. Max boost before spiking was 16.9lbs. I had the Blitz i-color boost controller as well. We couldn't figure it out so we left it at 16.9lbs. but it was still fast and really fun.

idahotuner · 08-18-2008, 05:39 PM

you guys need to get an avc-r it holds 10 psi 14ps 16 psi 20 psi very stable

WA_Sileighty · 08-18-2008, 05:52 PM

wondering if possibly the wastegate arm is too tight, worth a try i suppose. sure is more fun to drive now, need cams and more boost though :-)

Ninjabread · 08-18-2008, 06:15 PM

Quote:

Originally Posted by anyotherone

No, just figure out what you want more - topend or midrange

In my case I had the Full Race turbo manifold and my .86ar spooled more like a .64 so I got the best of both worlds.

"Good" or "best" are relative terms in this sort of decision. Are you going to drift? Autocross? Street daily driven? Drag or highway race?

I drove my car 95% street and 5% drag, so I went to the .86ar but used cams with better mid range to create a combo that I was really happy with.

I drift my car and daily it, but I dont really care how it is on the street.

Right now I have hks 264 step 2, and I think they would be a good match with the .86. I thought of also keeping the stock cast manifold, because it doesnt crack, and I heard it helps spool a tiny bit.

We'll see, whatever I buy its going to happen over the winter.

Inlandsilvia · 08-18-2008, 11:09 PM

Finally got my S14 tuned right and making power. I am running the following mods:

GT2871R .64 /HKS actuator
1.1 Apexi HG
264 BC cams
BC Valve springs/retainers
Megan mainfold
Megan turbo elbow
Megan downpipe
Megan test pipe
Uras 3" exhaust
Greddy FMIC
NO BOV
Apexi PFC
740cc
Sard FPR
Greddy E01

At 1.1 bar my car was putting down 330hp/301tq.

SoguRacing · 08-18-2008, 11:12 PM

were those stage 1 or stage 2 cams..also, what dyno?

s15specR · 08-19-2008, 07:48 AM

Quote:

Originally Posted by Inlandsilvia

Finally got my S14 tuned right and making power. I am running the following mods:

GT2871R .64 /HKS actuator
1.1 Apexi HG
264 BC cams
BC Valve springs/retainers
......................................

At 1.1 bar my car was putting down 330hp/301tq.

S14 or S13 SR20 engine ?

codyace · 08-19-2008, 06:22 PM

Quote:

Originally Posted by purekoryo

I used to have S3 cams on my old sentra with SR20DET. Does the JWT S3 cams drop right into the S13 SR20DET motors, or does the cams need to be modified a bit? specifically the dowel pin at the end of the cams. Did you have to get the JWT S3M cams?

You don't need the longer dowell pin at all for it to work as it should.

BE careful with the M cams, as they IIRC are for the GTiR solid valvetrain.

Quote:

Originally Posted by usdm180sx

damn, you got it backwards TWICE.

.64 trim = s3 cams
.86 trim = s4 cams

That's my look at things too.

Quote:

Originally Posted by purekoryo

Have you tried both setups? You act like you did, and if you did and thought it was pretty bad, than that's great, I know now. But if you didn't I wouldn't say anything if I were you. At least I'm gonna try and see how that works out, as many people that do have JWT cams here go with S3's. As a matter of fact, many MANY sentra guys have sold S3's and bought S4's and never turned back. used S4's are hard to come by in sr20forum, but not S3's. As codyace mentioned they are easier to catch, and even used S4's are a bit more expensive than S3's for a reason. Many guys with the sentras run S4's in conjunction with T25 and T28 turbos all day. The guys with the T28's did not have any noticeable loss in power or lag with S4's.

The main thing i look at with t25/t28 guys, is that they typically aren't making enough power to really show the difference between the two. That, combined with lightning fast small turbo spool, also sorta/kinda leave it up to debate for me.

FWIW: There are a few Japanese tuners that swear by running smaller based turbos with BIG duration (we're talking 266-272) cams and seeing some interesting power (first example is the Mines car, as well as some of the Evo Time Attack cars we see in the JDMyo! kinda videos). Obviously it's hard to compare a little inline 4 to a a little inline 6, but it would be neat to see a side by side comparison from persay, the S3 camshaft to the s4, or to somethign like a 272 duration cam.

Experience says that the larger duration cams will increase spool, but it would be neat to see by how much with the 2871 turbocharger.

Quote:

Originally Posted by Ninjabread

so the consensus is basically that the .86ar sucks?

Damn, I was just about to buy one

It doesn't 'suck', it's just that (IMO) there are better routes to take. For those that argue 'you'll want the extra 20 whp'....no freaking way. 20 hp isn't even getting your toes wet in the pool. I say, if you want 400 whp, get the .64 housing...anything more, look ta a 3071/3076 variant.

Quote:

Originally Posted by anyotherone

No, just figure out what you want more - topend or midrange

In my case I had the Full Race turbo manifold and my .86ar spooled more like a .64 so I got the best of both worlds.

The tubular manifold typically spools smalelr turbos later, due to design, and lack of heat retention.

Quote:

"Good" or "best" are relative terms in this sort of decision. Are you going to drift? Autocross? Street daily driven? Drag or highway race?

I drove my car 95% street and 5% drag, so I went to the .86ar but used cams with better mid range to create a combo that I was really happy with.

This is the ebst way to look at things. I laugh at people that build 'drag' or 'drift' or 'grip' cars, and then take it their respective events twice a year, and are forced to drive a finnicky quasi-race car around the rest of the time. This is exactly why I went with the combo I did. It's perfect for a street car, and just so happens to work awesome on the road course. Don't get me wrong, I know where i could take away/add form the setup, but it's not worth the small changes to sacrifice it's street manners.

Quote:

Originally Posted by Inlandsilvia

Finally got my S14 tuned right and making power. I am running the following mods:

GT2871R .64 /HKS actuator
1.1 Apexi HG
264 BC cams
BC Valve springs/retainers
Megan mainfold
Megan turbo elbow
Megan downpipe
Megan test pipe
Uras 3" exhaust
Greddy FMIC
NO BOV
Apexi PFC
740cc
Sard FPR
Greddy E01

At 1.1 bar my car was putting down 330hp/301tq.

So arond 16 psi...you should be seeing more in the 350/360 range if you were on a dynojet dyno.

steve shadows · 08-19-2008, 06:55 PM

You MUST match cam duration/or power band effectiveness to the compressor you are using.

If you are say using a T67/T3 that spools up full boost at 5300 rpms then 264 cams are a terrible camshaft to be using. You should be using at least 272 cam durations with a relatively aggressive lift.

If you are using a .86 2871R for example. I would suggest a duration of 264-266

For 2871R .64 I would say a 260 Tomei cam would do the trick just right.

Matching cams to the turbo can make or break how aggressive the on power is.

You cannot fight the turbo. The turbo will want to make power about 1000 rpms after you get full spool on your turbo on sr20s (and a lot of other smaller 4 cylinder engines with similar heads).

I would suggest going with the flow.

If you have a GT30R for example lots of lift and moderate duration

If you have a 2871R for example moderate lift and moderate duration

If you have a GT35R for example aggressive lift and aggressive duration

If you have a GT4088R for example aggressive lift and very aggressive dur.

and so on and so on.

This is all proven over the last 1-2 years of using the dyno dynamics I have with various different sr20det setups and cam combinations.

purekoryo · 08-20-2008, 03:37 AM

Quote:

Originally Posted by codyace

You don't need the longer dowell pin at all for it to work as it should.

BE careful with the M cams, as they IIRC are for the GTiR solid valvetrain.

That's my look at things too.

The main thing i look at with t25/t28 guys, is that they typically aren't making enough power to really show the difference between the two. That, combined with lightning fast small turbo spool, also sorta/kinda leave it up to debate for me.

FWIW: There are a few Japanese tuners that swear by running smaller based turbos with BIG duration (we're talking 266-272) cams and seeing some interesting power (first example is the Mines car, as well as some of the Evo Time Attack cars we see in the JDMyo! kinda videos). Obviously it's hard to compare a little inline 4 to a a little inline 6, but it would be neat to see a side by side comparison from persay, the S3 camshaft to the s4, or to somethign like a 272 duration cam.

Experience says that the larger duration cams will increase spool, but it would be neat to see by how much with the 2871 turbocharger.

It doesn't 'suck', it's just that (IMO) there are better routes to take. For those that argue 'you'll want the extra 20 whp'....no freaking way. 20 hp isn't even getting your toes wet in the pool. I say, if you want 400 whp, get the .64 housing...anything more, look ta a 3071/3076 variant.

The tubular manifold typically spools smalelr turbos later, due to design, and lack of heat retention.

This is the ebst way to look at things. I laugh at people that build 'drag' or 'drift' or 'grip' cars, and then take it their respective events twice a year, and are forced to drive a finnicky quasi-race car around the rest of the time. This is exactly why I went with the combo I did. It's perfect for a street car, and just so happens to work awesome on the road course. Don't get me wrong, I know where i could take away/add form the setup, but it's not worth the small changes to sacrifice it's street manners.

So arond 16 psi...you should be seeing more in the 350/360 range if you were on a dynojet dyno.

??? But you wanted to get C1's, that really contradicts your statement. Eitherway, I will post my experience with the S4's once its installed. Unfortunately I dont have back to back dyno results, but I did have a GT2871r .86 with S3 cams before and the spool was pretty bad. So far the GT2871r with .64 housing spools really nicely.
SCC did some comparisions of the JWT cams...

scc cam comparo link (please make this a sticky!) - Page 2 - SR20 Forum
NEW JWT S4 SCC REVIEW - SR20 Forum

S4 cams really does not lose much if any low end, just gains more midrange and high end than the S3's.

purekoryo · 08-24-2008, 02:50 PM

Just installed the S4's....
THIS CAR IS CRAZY!!!
I NEED WIDER TIRES!!!

I did not notice any low end loss, the mid range to top end is unbelievable. The S4's are a bit better than the S3's even with a small turbo GT2871r .64. I can see why sentra guys even install these on the T25's and T28's. I will take the car to the dyno next chance i get, but for now I definitely need some wider tires as I will just sit there in 2nd gear after 3-4krpm's. 3rd pull on the highway was too dangerous on stock tires.

Mind you that this was all on 15 psi. After I get some Azenis 245's in the rear and 225 in the front, I will turn it up to about 19 psi.

GabeS14 · 08-25-2008, 02:10 AM

Quote:

Originally Posted by purekoryo

Just installed the S4's....
THIS CAR IS CRAZY!!!
I NEED WIDER TIRES!!!

I did not notice any low end loss, the mid range to top end is unbelievable. The S4's are a bit better than the S3's even with a small turbo GT2871r .64. I can see why sentra guys even install these on the T25's and T28's. I will take the car to the dyno next chance i get, but for now I definitely need some wider tires as I will just sit there in 2nd gear after 3-4krpm's. 3rd pull on the highway was too dangerous on stock tires.

Mind you that this was all on 15 psi. After I get some Azenis 245's in the rear and 225 in the front, I will turn it up to about 19 psi.

Sounds sick!!!
post up dyno!!! now!!!
but then again.. stock tires....
I have 10.5 inch rears running 245's and i spin tires in third and fourth on fwy if i boost above 18psi. my tires are sorta worn, but still wide.. so I am dying to know your results, since i am very close to ordering my own set!

steve shadows · 08-25-2008, 06:40 PM

Quote:

Originally Posted by codyace

So arond 16 psi...you should be seeing more in the 350/360 range if you were on a dynojet dyno.

I think INLANDS #s are on a dynojet or hub dyno, so it would be lower on a Brake eddy Chassis dyno.

trogdor · 08-25-2008, 06:51 PM

.86 gt2871r + 272/272 cams = worst mistake of my life

steve shadows · 08-25-2008, 09:18 PM

Refer to my post above

Ninjabread · 08-25-2008, 11:03 PM

so would it be better with hks 264 step 2s lol

08-15-2008, 06:23 PM	#396
usdm180sx Post Whore! Join Date: Dec 2005 Location: 562 Posts: 4,807 Trader Rating: (5) Rides Gallery: usdm180sx Feedback Score: 5 reviews	damn, you got it backwards TWICE. .64 trim = s3 cams .86 trim = s4 cams __________________ -Norm!

08-16-2008, 09:04 AM	#398
usdm180sx Post Whore! Join Date: Dec 2005 Location: 562 Posts: 4,807 Trader Rating: (5) Rides Gallery: usdm180sx Feedback Score: 5 reviews	The powerband for the .64 and s3 cams are both mid range. The powerband for the .86 and s4 cams are for more top end. Your setup will work, but it's not optimal. I had the HKS GT-RS (basically the .64) on an s14 sr (w/nvcs) and ran HKS 256/264 cams (more mid range). Here's a dyno chart documenting my "experience:" __________________ -Norm!

08-16-2008, 09:58 AM	#399
Ninjabread Post Whore! Join Date: Jul 2005 Location: Ottawa, Ontario Age: 32 Posts: 3,492 Trader Rating: (2) Rides Gallery: Ninjabread Feedback Score: 2 reviews	so the consensus is basically that the .86ar sucks? Damn, I was just about to buy one __________________ 613DriftWerks.ca

08-18-2008, 05:39 PM	#406
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	you guys need to get an avc-r it holds 10 psi 14ps 16 psi 20 psi very stable __________________ My Twin Scroll Gt30r Sr22det Build

08-18-2008, 11:09 PM	#409
Inlandsilvia Zilvia FREAK! Join Date: Sep 2005 Location: Murrieta (Socal) Posts: 1,031 Trader Rating: (25) Feedback Score: 25 reviews	Finally got my S14 tuned right and making power. I am running the following mods: GT2871R .64 /HKS actuator 1.1 Apexi HG 264 BC cams BC Valve springs/retainers Megan mainfold Megan turbo elbow Megan downpipe Megan test pipe Uras 3" exhaust Greddy FMIC NO BOV Apexi PFC 740cc Sard FPR Greddy E01 At 1.1 bar my car was putting down 330hp/301tq. __________________

08-06-2008, 12:50 PM	#391
WoolyS14DET Zilvia FREAK! Join Date: Mar 2008 Location: Long Island, NY Age: 42 Posts: 1,310 Trader Rating: (18) Feedback Score: 18 reviews	Something def not right I think it should be a lil more then that at 16psi.

08-06-2008, 09:54 PM	#392
purekoryo Leaky Injector Join Date: Aug 2008 Location: VA Age: 40 Posts: 102 Trader Rating: (0) Feedback Score: 0 reviews	I used to have S3 cams on my old sentra with SR20DET. Does the JWT S3 cams drop right into the S13 SR20DET motors, or does the cams need to be modified a bit? specifically the dowel pin at the end of the cams. Did you have to get the JWT S3M cams?

08-13-2008, 07:55 PM	#394
fc3sace Leaky Injector Join Date: May 2008 Location: California Posts: 72 Trader Rating: (3) Feedback Score: 3 reviews	I posted a previous thread with my first dyno pull with minor bolt ons: AFC NEO, Exhaust, and fmic Dynoed at 203 hp with 198ft lbs of torque After obtaining some new parts: Megan Elbow Garrett 2871r .64 w/HKS actuator Power FC D-Jetro Tomei 740cc injectors Nismo FPR Walboro 255lph fuel pump I managed to pull out 284 hp with 14lbs of boost (no boost controller) I forgot what the torque was but ill post a pic of my dyno sheet later today. LMK what u guys think... by the way its still on stock internals with stock headgasket.

08-15-2008, 04:10 PM	#395
purekoryo Leaky Injector Join Date: Aug 2008 Location: VA Age: 40 Posts: 102 Trader Rating: (0) Feedback Score: 0 reviews	I have decided on the JWT S4 Cams. I will install the following this Sunday. GT2871r .64 JWT S4 Cams 740cc Nismo Injectors Z32 MAF Enthalpy ECU Megan O2 housing with ebay 3" turboback exhaust Does anyone have the same setup or have run S4's previously? From what I hear from sr20forums, S4's kick some ass. I've had S3 on my sentra B14 before with the GT2871r but with .86 housing, so that had some bit of lag. I wonder how much decrease in lag I will notice even with the S4's.

08-16-2008, 12:48 PM	#400
s13envy Zilvia Junkie Join Date: May 2004 Location: Shelbyville, IN Age: 37 Posts: 407 Trader Rating: (3) Feedback Score: 3 reviews	i dont think the .86a/r sucks at all!! I loved mine and would actually consider doing another one. buy the .86a/r b/c you'll want the extra power after you get used to the .64A/R. just my opinion

08-17-2008, 05:57 PM	#401
purekoryo Leaky Injector Join Date: Aug 2008 Location: VA Age: 40 Posts: 102 Trader Rating: (0) Feedback Score: 0 reviews	Just got the .64 installed. Wow it spools up much quicker than the .86 I had. I will install the jwt s4 cams next weekend and post the experience and then I may get it dynoed.

08-18-2008, 01:15 PM	#402
Oneoverwrx Leaky Injector Join Date: Aug 2007 Location: Kentucky Age: 34 Posts: 72 Trader Rating: (0) Feedback Score: 0 reviews	only buy the .86 if you want to make power and go fast!!!!lol

08-18-2008, 03:45 PM	#403
WA_Sileighty Join Date: Oct 2006 Location: Vancouver, WA Age: 36 Posts: 48 Trader Rating: (0) Feedback Score: 0 reviews	i can post my dyno sheet when i get a chance. I recently installed the .64 on my redtop. Liking it so far. Problem was that while he was trying to dyno it he could only get it to hold stable boost at around 14lbs. Anything higher and it would spike above 20. I was having him shoot for 17 psi when tuning it but ended up tuning it for 14. I just used the standard wastegate when i installed it, i figured my blitz spcid would handle the rest. I see alot of people using the HKS actuater though even if they have an ebc. would its adjustability help me with spiking issues?

08-18-2008, 05:52 PM	#407
WA_Sileighty Join Date: Oct 2006 Location: Vancouver, WA Age: 36 Posts: 48 Trader Rating: (0) Feedback Score: 0 reviews	wondering if possibly the wastegate arm is too tight, worth a try i suppose. sure is more fun to drive now, need cams and more boost though :-)

08-18-2008, 11:12 PM	#410
SoguRacing Post Whore! Join Date: Nov 2007 Location: (714) Age: 35 Posts: 2,967 Trader Rating: (23) Rides Gallery: SoguRacing Feedback Score: 23 reviews	were those stage 1 or stage 2 cams..also, what dyno? __________________ Pre Tune Checkup! Compression,LeakDown,Vacuum Test $80. Cams Install: $180

08-19-2008, 06:55 PM	#413
steve shadows Post Whore! Join Date: Aug 2003 Location: LA and OC Posts: 8,202 Trader Rating: (5) Feedback Score: 5 reviews	You MUST match cam duration/or power band effectiveness to the compressor you are using. If you are say using a T67/T3 that spools up full boost at 5300 rpms then 264 cams are a terrible camshaft to be using. You should be using at least 272 cam durations with a relatively aggressive lift. If you are using a .86 2871R for example. I would suggest a duration of 264-266 For 2871R .64 I would say a 260 Tomei cam would do the trick just right. Matching cams to the turbo can make or break how aggressive the on power is. You cannot fight the turbo. The turbo will want to make power about 1000 rpms after you get full spool on your turbo on sr20s (and a lot of other smaller 4 cylinder engines with similar heads). I would suggest going with the flow. If you have a GT30R for example lots of lift and moderate duration If you have a 2871R for example moderate lift and moderate duration If you have a GT35R for example aggressive lift and aggressive duration If you have a GT4088R for example aggressive lift and very aggressive dur. and so on and so on. This is all proven over the last 1-2 years of using the dyno dynamics I have with various different sr20det setups and cam combinations. __________________ Like Me on FaceBook !

08-24-2008, 02:50 PM	#415
purekoryo Leaky Injector Join Date: Aug 2008 Location: VA Age: 40 Posts: 102 Trader Rating: (0) Feedback Score: 0 reviews	Just installed the S4's.... THIS CAR IS CRAZY!!! I NEED WIDER TIRES!!! I did not notice any low end loss, the mid range to top end is unbelievable. The S4's are a bit better than the S3's even with a small turbo GT2871r .64. I can see why sentra guys even install these on the T25's and T28's. I will take the car to the dyno next chance i get, but for now I definitely need some wider tires as I will just sit there in 2nd gear after 3-4krpm's. 3rd pull on the highway was too dangerous on stock tires. Mind you that this was all on 15 psi. After I get some Azenis 245's in the rear and 225 in the front, I will turn it up to about 19 psi.

08-25-2008, 06:51 PM	#418
trogdor Zilvia Member Join Date: May 2007 Location: dub c Posts: 212 Trader Rating: (0) Feedback Score: 0 reviews	.86 gt2871r + 272/272 cams = worst mistake of my life

08-25-2008, 09:18 PM	#419
steve shadows Post Whore! Join Date: Aug 2003 Location: LA and OC Posts: 8,202 Trader Rating: (5) Feedback Score: 5 reviews	Refer to my post above __________________ Like Me on FaceBook !

08-25-2008, 11:03 PM	#420
Ninjabread Post Whore! Join Date: Jul 2005 Location: Ottawa, Ontario Age: 32 Posts: 3,492 Trader Rating: (2) Rides Gallery: Ninjabread Feedback Score: 2 reviews	so would it be better with hks 264 step 2s lol __________________ 613DriftWerks.ca

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode