*ISIS RS3871 Turbo Upgrade for the Nissan SR20DET.
ISIS Has just released their newest turbo upgrade option for the SR20DET. This is a great inexpensive upgraded turbo for your SR20DET.
Virtually identical to the Garrett GT2871R, just non-ball bearing Big Performance in a compact package
This compact turbocharger offers much more top-end power than the the stock Turbos. It offers great response on 1.8 litre to 2.2-litre four-cylinder engines.
Compressor side 3" inlet
Exhaust side 0.64 A/R turbine housing, Results:
This turbo is rated up to ~380hp. (Very Similar to a gt2871r turbo)
For complete bolt on, we reccomend these additional parts.
90 degree 2.00-2.25" Coupler - For hotpipe
ISIS Intake Kit - SR20DET S13 or Z32 MAF
45 Degree 3.00"-2.75" Coupler - For intake kit
ISIS Turbo line kit
ISIS Turbine Outlet O2 Housing - Nissan SR20DET S13/S14 - makes install much easier
** This Turbo requires a 3an feed line, DO NOT use a 4an feed line **
** ISIS Turbos come with a 6 month Manufacturers Defect warranty **
Posted by d21 turbo on 17th Apr 2013
Bolted to my s14 no issues except oil drain, which is easily modified to fit. Definitely need the 2 suggested couplings, turbo sits further forward and piping hits dipstick and ps lines if not used
Posted by Izento on 2nd Mar 2013
So, I've noticed there is no review for the CA18, well, let me enlighten you.
First I'll start off with the good.
-Big difference from T25
-Life (somewhat irrelevant since I've only had it for 1 month and not daily driven)
-No stupid outlet or inlet bolt on pipe like SR T25 (screws CA18 owners)
-DIF CA18 (Bottom mount stock location) SS lines were a direct fit.
-Nice box with enough shock absorption.
-T28 oil drain pipe didn't fit. Had to modify drain.
-Late boost (4k rpm, somewhat later than expected. Turbos do not require break in procedures [cited by Garrett].)
My engine related specs:
-Tomei Poncams 256/256
-2.5 cat back
Experience of turbos on my engine:
Posted by Dom on 10th Sep 2012
generally people feel a bit sketchy about this brand for anything major (their light weight pulleys are a hit). But in a world filled with economical depression and Chinese made craftsman tools sometimes you just don't have the scratch to go greddy or hks.
Enter the isis r3871 turbo charger for the rwd sr20det. the turbo uses the same specs as the 2871r with the price being cut due to the use of journal bearings as opposed to ball bearings.
the turbo uses a three inch inlet and .64 a/r exhaust side.
the good :
*bolts up to your stock flange (t2)
*internal waste gate
*internal oil pressure regulator
*stock spring allows for right around 8lbs of boost which can be maintained with a bit of extra fuel pressure with out needing a tune right away
*on my set up it spools right at 2500 rpms at about 35% load
* rated 380 whp with supporting mods and tuning
* good to +- 22 lbs boost
* water cooled (less time to cool the turbo and oil after a hard drive)
*1 year warranty
* best of all itll only run 500 bux for the turbo its self (up to 20% off military through enjuku)
*cant use stock lines (not a direct swap)
*no one rebuilds these(see warranty)
*journal bearing means longer break in and less durable over time
*not greddy, garrett or hks
*oil return fitting is straight which can cause your return line to kink(use stock one from a t25)
I ordered the turbo from enjuku racing by way of bg's recommendation. They rock them on their drift cars i should have no problems on the street.
I opened the box and was greeted by a very solid stout looking turbo. its not the biggest ive ever run but it looked like it would do very well for my purposes
i installed the ss lines first then mounted the manifold and O2 dump (gaskets and crush washers included )it was all very straight forward, made easier by my manifold being aftermarket and the 45 degree elbow for my intake. the only hitch was that the routed the intake into the path of my power steering lines so i used a 90* house and a coupler to move it around.
at first i felt like i had been robbed, i didnt try for full boost for 100 miles, then only quick pulls. the turbo was slow to react and wasn't really doing much until almost 4 grand. it wasnt until about 300 miles on the turbo that i finally saw what i was hoping for. the spool had moved left to about 3k much like the stock set up i was used to. the spool time was much faster to build boost and the power was ridiculous from a turbo that costs only 500 bux. i spent some time with a fpr and a wide band and dialed it in(42lbs at idle) gave me the best response with out drowning the spark after blow off or coming off the throttle. 2 week ends later i degreed my BC cam gears to about +8* and moved the spool down to about 2500 rpms. the turbo feels nice and responsive. If you want to slide around the gentle curve then give it some gas if not then dont. fuel economy varies by day (depending on driving styles) I can maintain about 25mpg hwy even with the mods.
Isis is up and coming, if you don't believe me then look at the lower oil pan, the intake manifold and the control arms all for the s chassis. alot of people like to knock them based on something that happened to a guy a friend knew on the local forum.... well f that guy. this turbo is great. all you have to do is put it in, break it in and see for yourself.
Posted by manuel a. on 25th Aug 2012
I had this turbo for almost a year now still running strong. At 10 psi Smoked a 2011 evo. Right now have it at 20 psi an man it pulls so strong on a s13 red top
Posted by Sanjay on 18th Jul 2012
Awesome turbo for the price, was on the dyno with my 9:1 KA with the wastegate at stock position it puts out about 9-10 psi which netted me 255hp and 265tq.....i was shooting for over 300 at 15psi which would have been easy judging from how the turbo was responding to the tuning...but my clutch gave out...boost builds from about 3300rpm but HITS at around 3700 rpm....but it really hauls ass till the top. Worth every penny...BTW the isis Clutch line is perfect bolt on fitment for oil feed.
Posted by Donnie on 6th Apr 2012
I am a sponsored D1 driver of Enjuku, I have been using my RS3871 for 2 weeks now and its awesome! buy this and win.
Posted by Matt Hopkins on 6th Mar 2012
Currently rocking the 3871r on my ka24det w/ 9.0:1 pistons on e85, pushing 20 psi car made 336whp and 360 ft/lb trq.
Great spool time for a journal bearing turbo, i'm getting full boost at 3600 rpm's and it holds strong all the way through the rpm range. Great turbo for the money!
Posted by Christopher Acevedo on 12th Feb 2012
Man this is an awesome turbo for the price tremendous response!
Posted by Will on 31st Dec 2011
i bought this turbo about a week or so ago and its been great till i can get a BB great buy for under 600$