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Old 12-28-2010, 03:45 PM   #1
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SR SR20DET: Quick,Easy,And Reliable Way For 320-350whp!!!

Im in the process of trying to reach the 320-350whp level with my sr20det. im looking for quick spool and at the same time having the broadest powerband possible for drifting. Im looking to use the smallest turbo possible(maybe even a turbo that is within its efficiency range at 400whp). This is not a big budget build by no means but i am willing to spend the money where its needed most. I figure it would be interesting for people to post up their personal setups that are at,or about the same horsepower i am referring to. And also what people would do differently to their setups if they could and would do it over again. Im hoping this thread will benefit many and not only myself. A little personal info on my current engine setup(its not much but maybe you can fill in the blanks for me as to what i need to achieve my power goals). So i have a redtop sr20det,all stock internals,stock t25 turbo,Walbro 255 fuel pump,full 3" Blitz exhaust with test pipe,Greddy front mount intercooler,Greddy airinx foam fiter,Blitz blow off valve(venting to atmosphere),lightweight pulleys,newly installed Isis intake manifold(don't hate on me too much),Spec stage 4 clutch and lightweight flywheel,boost controller set at 12 pounds of boost(or at least thats what the boost gauge shows),Isis aluminum radiator and dual flex-a-lite electric fan assembly,not yet installed Isis fuel pressure regulator, no ecu tuning whatsoever and stock maf. Oh and what would someones guess on how much power the car is currently producing as its never been on the dyno...Feel free to post and for anyone questioning some of the not so "baller" parts on the car just know that im keeping a tight budget on this car as my other build (700whp street S2000)has got a little out of hand.Thanks for looking.
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Old 12-28-2010, 03:56 PM   #2
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instead of making this post you should have searched...i'll partially feed you...search gt28r, gt2871r, gt28r, search differnt types of cams as well. all should eventually yield you the results you are looking for.
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Old 12-28-2010, 04:04 PM   #3
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I have searched a bunch of different keywords and im getting bits and pieces of info which is great, but i figured many people on zilvia using the sr20det are probably in the horsepower range i am looking for and many others are probably trying to achieve about the same power for a fun, reliable street/drift car so having proven setups as well as different ways to reach this power level would be interesting and beneficial to many, and in one thread for comparison purposes as well. Thanks for your post sidewaysil80.
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Old 12-28-2010, 04:13 PM   #4
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okkkkkkkkkk fineeeeeeeeeeeeeeeeeeee...in order of importance:
-ditch the isis...i love the brand too but that and the greddy manifold both suck. you gain very little up top and steals alot from down low. not worth it.
-next recirculate...the car will run alot better

parts...
-get an ehaust manifold
-turbo outlet pipe/down pipe
-full intake
-bigger injectors (480cc or 555cc max for your goal)
-some type of engine management...piggy back or reflash is all you need. dont let these people tell you need haltech for a stockish bolt on setup. i have seen 100000x 300-320 cars on safc's, emanages, and reflashes. is it preferred no...stand alone or flash is the way to go...but will it work and be safe YES! (I have an s15 with bolt ons and i use an safcII but i'm stock everything except psi, exhaust side, front mount, intake)
-s15 spec r turbo or a disco potato...some people are going to try and sway you to a gt2871r...i personally didn't like it. it was pretty laggy but i had shitty cams and that shitbox greddy manifold...so thats on you. but for your numbers and goal i think a s15 or disco potato will be all you need (it will be SUPER responsive and fun...no spool time)
-boost controller to run 15psi (thats basically the limit for the turbos i suggested)
-in addtion i would strongly suggest head studs and a metal head gasket (stay away from cometic i've heard horror stories) for that kind of psi. 12 psi is about the max i would run on a stock gasket/head bolts.
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Old 12-28-2010, 04:29 PM   #5
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It's not complicated....
This is the short and simple no BS list of what you need
GT28rs(quickest spooling true 330 to 350 hp turbo you can find)
550cc injectors at least( 740's wouldn't hurt)
Z32maf
Enthalpy or JWT ecu tune
15 to 18psi
Metal headgasket optional, most people who say the stock headgasket can't hold this boost haven't tried it. I'm running a cometic since I did a rebuild, works great. head and block surface prep is key.
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Old 12-29-2010, 10:54 PM   #6
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Quote:
Originally Posted by nismoman View Post
It's not complicated....
This is the short and simple no BS list of what you need
GT28rs(quickest spooling true 330 to 350 hp turbo you can find)
550cc injectors at least( 740's wouldn't hurt)
Z32maf
Enthalpy or JWT ecu tune
15 to 18psi
Metal headgasket optional, most people who say the stock headgasket can't hold this boost haven't tried it. I'm running a cometic since I did a rebuild, works great. head and block surface prep is key.
Yep, GT2860RS was my favorite of the 3 GT series turbo's I had. (GT2860RS, GT2871R, GT3076R, all .86ar) Efficient for what you want to do. They just got laggier and laggier the bigger I went...
I also had a Z32 MAF, 740cc Deatschwerks injectors, and a DIY ECU Tune/Burn. Ran a cometic as well, so no new news there.
This is what I used, and worked for a rock solid 350whp, with headroom for E85.

This is personal experience, so take it as you will. The only thing I would change, is 'maybe' get one size smaller AR on the turbine if you wanted crazy spool...
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Old 01-03-2011, 01:16 AM   #7
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350hp

yup yup i would go with the disco potato, tomei cams , z32 maf ,550cc injectors, ss lines for turbo and a emanage ultimate in case you wanna change the settings and push 15 to 18psi and for sure u are going to get 350 disco potato spool up pretty quick the s15 t28 us legit but ur going to push its limit after 330 hp in my point of view good luck post up a dyno sheet once ur done bro
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Old 12-18-2011, 06:04 PM   #8
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Quote:
Originally Posted by nismoman View Post
Metal headgasket optional, most people who say the stock headgasket can't hold this boost haven't tried it.
I second that. Below is my setup:

Stock headstuds & head gasket.
GT28RS @ 14 psi
FMIC
3" Intake & Cone with Q45 MAF
550cc
Megan Exh. manifold, 3" outlet/downpipe/exhaust
SAFCII with a Mines ECU (meant for OEM injectors & boost with more timing)

Best dyno pull has been 272 whp.
I've had this setup for 2 years and have done at least 12 trackdays on it. I will say I feel limited by the SAFCII and want something with more adjustment but for the price it runs well.
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Old 12-28-2010, 10:12 PM   #9
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thanks sideways and nismoman,your posts are much appreciated! Anyone else?
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Old 12-28-2010, 10:26 PM   #10
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Oh i forgot i have the 3" downpipe and im going to be doing the turbo manifold and turbo outlet pipe at the same time im replacing the turbo. Im thinking of doing the Isis turbo upgrade package from Enjuku since i have a decent discount from them. It includes the isis manifold,turbo outlet pipe,oil lines, and a turbo rated up to 380hp. Ive read some people saying the Isis turbo hits harder and pulls longer than an s15 turbo. So that and a z32 maf, Enthalpy tune,and bigger injectors would probably be enough? i was thinking about also doing rocker arm stoppers,Jwt cams(the mildest set),metal headgasket and maybe even arp headstuds? what do you guys think? Anyone else?

Last edited by NYS13SLIDER; 12-28-2010 at 10:43 PM.. Reason: additional info
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Old 12-28-2010, 10:31 PM   #11
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Old 12-28-2010, 10:45 PM   #12
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Queens. why?
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Old 12-29-2010, 12:04 AM   #13
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Start Reading:

http://zilvia.net/f/tech-talk/124925...t=2871r+owners

2871r thread.
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Old 12-29-2010, 12:04 AM   #14
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Old 12-29-2010, 12:12 AM   #15
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are you stalking me???
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Old 12-29-2010, 12:51 AM   #16
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u can get 3-350 with a s15 turbo
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Old 12-29-2010, 05:51 AM   #17
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Quote:
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u can get 3-350 with a s15 turbo
No you cant, show me a dyno chart.....
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Old 01-03-2011, 12:42 AM   #18
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Quote:
Originally Posted by yingiang View Post
u can get 3-350 with a s15 turbo
Brake HP at flywheel yes,

We have been able to hit 300 WHP on the dyno dynamics with teh S15 turbo and stock cams on S14 stock long block, with FMIC and Exhaust but the turbo was pretty close to maxing out.

I have seen some cars with head work, cams, standalone and S15 turbo making 330 whp on DD, and 355-360 on DJ but cars were running around 18 psi and had almost 18 hours of dyno tuning into them.

With enough fine tuning and money spent on tuning you can really push the limits of various setups But with fly by night and all the low balling and lack of money investing in these cars in the actual tuning of the EMS sometimes the real full potential is never met. gotta pay to play.

I think the 2871R is still the best option for a good bolt up 300-360 WHP turbo on pump gas with minimal EMS, ROM retuning for a street setup. With a little more time in tuning and Haltech or better EMS on a good dyno you can see upwards of 400 whp even on pump gas with the right boost and timing. Motor and everything needs to be in tip top mechanical condition though. Some of these container motors and even the rebuilt ones are just not put together as well as they could be, this will zap outputs and probably why from setup to setup with all the external mods being equal many cars have very different actual road power outputs.
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Old 12-29-2010, 06:19 AM   #19
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haha codyace...let me know if you have any questions about anything 240sx or sr20 related...lol
joking!!
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Old 12-29-2010, 06:20 AM   #20
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id like to see that dyno chart of an s15 turbo making 350hp as well.
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Old 12-29-2010, 06:42 AM   #21
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My setup:
redtop rebuilt with forged internals (mahle/eagle) cometic/arp studs
stock head with hks 272 step 2 and required springs etc with new rockers
peakboost topmount setup
precsion 50 trim .64 hotside w/tial ewg
nismo 740s
denso supra fuel pump tomei fpr
greddy fmic/ssqv
ls2 coilpacks
aem ems

Sure I'm forgetting others but this should put out about 375-400whp with good spool and decent powerband. A little more then you are looking for but being rebuilt it will be reliable and capable if much more should I desire to go there.
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Old 12-29-2010, 07:47 AM   #22
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so i installed the isis intake manifold as i stated before,im contemplating between the s3 and s4 cams from Jwt. what would you guys recommend? again im planning on being in the 350 whp range.

Thanks for posting niscur29!
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Old 12-29-2010, 04:50 PM   #23
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S3 cams from jwt
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Old 12-29-2010, 05:02 PM   #24
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there was a local shop..actually 2 that had many cars come out of their shop with cams and s15 turbo and made like 300...idk i aint searching for that stuff. i made 210/170 with s15 turbo at 5psi with no internal upgrades. add 10 psi and cams and i could of made it easily.
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Old 12-29-2010, 05:42 PM   #25
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there was a local shop..actually 2 that had many cars come out of their shop with cams and s15 turbo and made like 300...idk i aint searching for that stuff. i made 210/170 with s15 turbo at 5psi with no internal upgrades. add 10 psi and cams and i could of made it easily.
I can/have seen 300-320. 350, no way.
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Old 12-29-2010, 06:20 PM   #26
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I can/have seen 300-320. 350, no way.
Excactly...And 320 is really pushing that turbo to it's limits
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Old 12-29-2010, 08:52 PM   #27
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sorry, didnt know saying 3-350 (ESTIMATE) would fire everyone up
carry on
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Old 12-29-2010, 09:01 PM   #28
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sorry, didnt know saying 3-350 (ESTIMATE) would fire everyone up
carry on
The OP wants a solid 350hp. A S15 T28 would leave him 30-50hp short.
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Old 12-29-2010, 10:31 PM   #29
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Lets also not forget guys (and obviously some know already) but running a smaller turbo at a higher boost level is 'more stressful' than a larger turbo running less boost and making a few more HP. Keep that in mind.

With that said, I like a turbo maybe one size larger than a HP goal. SUre a 28RS will make 350 whp, but a 2871r will do it with less stress and worry.


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sorry, didnt know saying 3-350 (ESTIMATE) would fire everyone up
carry on
"Oh I was wrong" would save some face right about now.
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Old 12-29-2010, 10:40 PM   #30
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Cody ace has the perfect platform to make 330 whp on a dyno dynamics!

I honestly hat havin a bazillion threads like this but look at the 2871 thread

I suggest the larger turbine housing 2871R, a haltech and a great tuner. Without good tuning it doesnt matter what insane parts you have its a paper weight
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