I'm planning on gettint a 91 - 94 240SX and dropping the S13 Redtop SR20DET in it. I figured that I wanted a maximum of 300 hp. I think 300 hp is a perfect ratio for street racing, drifting, and daily driving.
Now, I know the S13 SR20DET comes stock with 205 hp, but I was wondering how I could get it up to 300 hp.
1) How much horses would an S13 SR20DET produce at 13 p.s.i. with the stock turbo? Is this safe boost pressure? What is the highest I could run safely with the stock turbo?
2) How would I achieve my goal of 300 horses with a SR20DET?
Would it be better to upgrade the SR20DET with it's stock turbo or would it be better to buy a different turbo to achieve 300 hp?
3) If I were to buy a better turbo, what are some recommendations?
4) Is the SR20DET's stock turbo a ball bearing turbo?
first of all, you need to find the engine/ front clip to buy. check for low millage, leak down test results, and other sorts of information you can find on the engine.
1.) 13 psi is alot of boost for a daily driver. you would have to put alot more money into your engine ( piston heads, cams, rods, bearings) the stock turbo/ engine would eat itself at the much boost pressure- im not even sure if the turbo could withstand that much pressure without any other cooling/ oiling measures ( intercooler/ oil pump). and no 13 psi is not recommended for the stock SR20DET.
2.) new turbo, intercooler, wastegate, Blow off valve, lower compression pistons, cams, cam gears, exhuast, ECU. its better to upgrade the turbo to be able to run the boost pressures that you're looking at.
3.)SEARCH FOR TURBO KITS- ITS EASY!!!! HKS, BLITZ, TRUST, GREDDY, DRAG, ect...
4.)the stock turbo is not ball bearing. i suggest buying a HKS GT turbo ( ball bearing) . if you want to drift, you need a turbo which will produce power quickly and be able to withstand the straing of high revs constantly.
search next time, these things are all over the forums/ internet. sont be so lazy bro. just look
The standard turbo for an S13 SR20DET is not ball bearing. Some S14's in some markets may have had them. There's not much point going past 12psi with the stock T25 turbo, limit of the exhaust wheel???, too much heat for prolonged operation, people certainly run them up to 15. A T28 (GTiR) is good for 15psi.
You'll need to do something about the computer as it won't run properly with this much boost. (Incedentally, a GTiR will happily run at 15psi)
A mates car ran for a couple of years at 300hp+ on stock internals. Eventually a rod or rod bolt let go but that may have been more an oil pressure problem, or lack of it. It had been running about 325hp at the wheels for some time prior. This was a larger turbo that the T28...
Basically, the limits of the stock turbo are easily exceeded by the motor. Get a bigger turbo. You will get to the point where you'll need bigger injectors & fuel pump too.
AJ
I'm planning on gettint a 91 - 94 240SX and dropping the S13 Redtop SR20DET in it. I figured that I wanted a maximum of 300 hp. I think 300 hp is a perfect ratio for street racing, drifting, and daily driving.
Now, I know the S13 SR20DET comes stock with 205 hp, but I was wondering how I could get it up to 300 hp.
1) How much horses would an S13 SR20DET produce at 13 p.s.i. with the stock turbo? Is this safe boost pressure? What is the highest I could run safely with the stock turbo?
2) How would I achieve my goal of 300 horses with a SR20DET?
Would it be better to upgrade the SR20DET with it's stock turbo or would it be better to buy a different turbo to achieve 300 hp?
3) If I were to buy a better turbo, what are some recommendations?
4) Is the SR20DET's stock turbo a ball bearing turbo?
- Thanks
1. s13 sr20det's come with a garrett t25 turbo which maxes out at about 12psi. also, it is not recommended that you take it anywhere higher than 12psi
2. a t25 from a stock s13 sr20det will not take you close to 300hp. to reach 300hp, a turbo upgrade is a given. a t28 from a s15 sr20det could take you to about 280-300hp with proper tuning and some other mods. that's only one of many different turbo choices you have..i'm just throwing one out there. with a bigger turbo, you'll need bigger injectors, possibly an aftermarket fuel pump/rail depending on size of turbo/injectors, a standalone or piggyback fuel management system, a fmic upgrade, a head gasket for higher boosts, and a radiator upgrade to keep the temps down. A fan upgrade, and some top end engine work if wanted. Don't forget about other mods such as boost controller, a bigger maf, an exhaust system, some gauges, and a clutch upgrade.
3. S15 Garrett T28, hks gt2540, there are LOTS out there.. if you want, you can even get a custom turbo set up.
4. t25 turbos from s13 sr20det's are not ball bearing. some t28 turbos from the s14 sr20det's are ball bearing and some are sleeve bearing. check serial number to check..or listen to it. ball bearing turbos sound like a skateboard wheel. s15 t28 turbos are ball bearing.
1) at 13 psi with factory tuning, expect around 200-210rwhp. Personally I would not run that much boost without a decent FMIC. With decent tuning (not sure on the RON rating of your fuel over there), you should get 240ish HP at 13psi
2 and 3) You will not get 300hp at the wheels on the stock t25/t25g or later s14 T28. You will have you upgrade the turbo. If you stay with a t2 series turbo, you will want a .86 exhaust housing on it and a turbo rated at around 350-380hp. You will also need some form of tuning, and injectors, and a decent fuel pump.
4) no the stock turbo is not ball bearing.
Quote:
Originally Posted by MontyCrabApple
I'm planning on gettint a 91 - 94 240SX and dropping the S13 Redtop SR20DET in it. I figured that I wanted a maximum of 300 hp. I think 300 hp is a perfect ratio for street racing, drifting, and daily driving.
Now, I know the S13 SR20DET comes stock with 205 hp, but I was wondering how I could get it up to 300 hp.
1) How much horses would an S13 SR20DET produce at 13 p.s.i. with the stock turbo? Is this safe boost pressure? What is the highest I could run safely with the stock turbo?
2) How would I achieve my goal of 300 horses with a SR20DET?
Would it be better to upgrade the SR20DET with it's stock turbo or would it be better to buy a different turbo to achieve 300 hp?
3) If I were to buy a better turbo, what are some recommendations?
4) Is the SR20DET's stock turbo a ball bearing turbo?
- Thanks
__________________
1995 Nissan 200sx (S14)
Wolf Version 4 plug-n-play Engine Management
HKS/SARD/Koni/Whiteline improved
From Zilvia, you hafta be a member to see it though.
If a slightly upgraded T25 is capable of 275 whp, a T28 is more than capable to hit 300 whp with the proper, and I mean very good, tuning.
__________________
"I swear Boris, if you didnt have bad luck you sure as hell wouldnt have any at all"-Nostrodomas, story of my life
Lewis Black quote of the Week:
"Baseball should go back to its roots and bring back performance hindering substances. If not for me, do it for the children."
Here in Dominican Rep., we use the SR20s in another way, we pushh the veery hard, stock internals and stock turbo, we have them running with 18psi and running very good (for this very hot weather).
Specificly my car:
´89 240sx,
SR20DET Red top,
stock internals,
stock turbo
Apexi S-AFCII,
Custom made 3´ exhaust from the turbo to the muffler
FMIC ... 28x6x3
Manual boost controller
2.5" intercooler pipings
HPs... I have no taken it to the dyno but the 1/4 mile is 14.8 @ 7psi with normal tires and Ive taken it to 18psi including "C12" Vp fuel and good tuning with the SAF2 and it doesn´t pings, that´s just 4 street races so I don´t know the 1/4 mile time.
I have a friend here who has an AE86 with an SR20DET and (He´s really nuts!) he UNPLUGGED the wastegate hose, so he´s running @ "whoknows"PSI and his car makes 13.1 @ the tracks. That crazy will blow his engine very soon!!!.
Well, my point is that I would give a little more credit to the stock turbo, knowing and understanding that 15psi from a big turbo are NEVER the same that 15PSI from the stock one.
The pics are into the "galeria" link and the vids are into the "foros" and then "descargas" links
So, my question, and the reason why I initially read this thread:
I´d like to know which is the maximum boost supported by a stock SR20DET, and yes... I searched and what I found was info about the top boost that a stock turbo can give and that I already know.
Thanks 4 your support and replies!!
__________________
:cool: If speed kills, I'm gonna die soon. :cool:
Last edited by aldyno - S13 : Mar 22nd, 2006 at 06:38 AM.
my stock t25 spiked to like 20psi once when some moron thought they were slick and disconnected my wastegate line. i was racing and noticed my car a lot faster and the damn turbo was making a humming noise when the torque really kicked in. i didnt have a boost guage at the time. but i opened my engine and there it was, just hanging freely. the turbo handled it for a while. and it didnt blow, but it was a close call. now im at a comfortable 7 pounds. someone wanted to kill my sr and when i find out im going to kick theyre ass.
__________________ Quote of the Day From Our Shop "Quick, ill wiggle it while you tug on it"
ill make you a list of mods man i had my 91 240 done with an sr and i wanted to make 300hp for daily driving/street/drifting and my car was running at 14psi making 295 at the rear wheels it could make 350 with right and very good tuning and a couple other mods but here it goes
Either Red or Black top SR20DET:
Engine Upgrades:
T3/T04E .63 A/R TURBO
Greddy VSPL FMIC
Peak Boost top mount turbo manifold
550cc injectors
Custom intake pipe with Z32 MAFS and filter
Custom hot pipe
Turbo lines
Custom 3in mid-pipe
Greddy Profec B Spec 2 Boost Controller
Greddy Turbo Timer
Walbro 255 Fuel pump
APEX N1 cat-back exhaust system
Greddy Type-S BOV
Optima red top battery
Flex-a-lite dual 12" fan
ACT 6-puck clutch kit
Standalone ECU (ask shop doing the swap which is the best for your set up)
Either Kaaz or tomei 2 way LSD
Really another way!!
(for this very hot weather).
but the 1/4 mile is 14.8 @ 7psi with normal tires and Ive taken it to 18psi including "C12" Vp fuel and good tuning with the SAF2 and it doesn´t pings, that´s just 4 street races so I don´t know the 1/4 mile time.
Quote of the Day From Our Shop "Quick, ill wiggle it while you tug on it"
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