This is a swap im considering doing in the next couple of months. Im trying to learn a little more about the engines themselves. More specifically, the gti-r det or the s13 det from the bluebird.

One thing im curious about is how much boost the det's can handle on their stock internals. I heard it was up at about 14-15 pounds, but i keep hearing about people doing the det swap and running like 7 pounds. So im not sure what to think. I was also told that swapping the headgasket would be all that was needed to go higher. I just want to get some realistic numbers on what this engine can do.

Next, a question on vvt from the s15's. They are all sr20det's... can the vvt system be swapped from an s15 sr20det to a gti-r or s13 det? Kinda like a vtec head swap is what im thinking.... but i dunno how the systems work on the det's. Just an idea i was playing with, probably not worth what it costs anyway ;D

Lets see here, is there anything i should know before i start. I know there are a few abnormalities with how a few things bolt up, i don't know how much stability is lost though, if any. I also know the transmissions have a few weak gears (third). Someone mentioned cryo treating the gears, but im not exactly sure how cryo-treatment works, other than the basic, make it really cold to strengthen it. I hear the 200sx se-r's stock lsd works fine.

My goals of this project are pretty lofty, I kinda want to push 15+ pounds of boost, but its a big jump considering ive never actually owned a turbocharged car at all :D But from what ive heard, the det's can handle a lot of boost, which is what im looking for right now.

everybody is at 7 psi on DETs because that is where the stock wastegate is set to.

to do above 12 psi, you will want to upgrade the turbo, to something like a T3/T4 or a nice HKS GT series would be nice for high HP and little lag/tractable power.

i am not sure about the S15 cylinder head conversion, would most likely require a custom intake manifold, as the RWD DETs have the throttle body on the wrong side. plus the direct ignition would not work.

for specific questions about cryo treatment, which turbo to go with, etc, check out the archives, or search the keywords under the search menu. most these questions have all been answered at least twice before... :D

good luck with your turbo project, and be prepared to learn everything about them before installing.

oh, and btw, the stock DE block has handled boost as high as 25 psi, though only for a little bit, on race gas, with water injection.

your 15 psi goal should be attainable with a good turbo.

Right on, ill look through the archives. Im also in the process of reading through the se-r mailing list archives. Im making notes of any little problems i may come up with.

Makes sense about the s15 head. Altho nobody had really been able to give me a solid answer on that one, and i don't exactly have the engine lying around to play with hehe ;D

Im curious. When you say it ran on 25 psi for a little bit... what happened. Did the head gasket blow? Did it start to knock for some reason? Did the rods or pistons get damaged? Im all for pushing the limits here, but safely. I don't wanna have to do the swap more than once. But if structurally the engine can handle that 25 psi without too much modification, im all for going for it ;D Then i can size the turbo for that app, instead of slowly swapping up turbos over and over. Id like to get to 12's or 13's and then just make sure the motor will work pretty reliably. Then i just plan to leave the engine alone. But if im looking at replacing everything internally and then some, i'll hold back. Basically, im trying to get the most out the engine that i can safely, without basically rebuilding the engine with stronger everything ;D I'll replace a few things... head gasket, maybe rods or pistons, but i don't wanna get too crazy. I know i'll need bigger injectors and probably a whole new fuel map at that point. I know how do do the efi programming on my own, but it would take me really long, from lack of experience... so with what it would cost me in dyno time to do it, i might as well have someone do it for me for cheaper... But im just thinking out loud now. Thanks for the info ;D

he didnt stay on it for a long time, just a drag strip pass.

i would say 20 psi would be as far as i would venture with a nice .82 A/R T3/T4, with C16 and water injection.

13s would not be a problem at all, i ran a 13.9@101.7 on street tires at 6 psi. i will see what it will do on 10 psi, and slicks.

on 20 psi, you would risk having a mid 11 second car, pending traction and driver skill. that much boost *should* propel you into the 120+mph range.

if you just want to run 12s, an FMAX stage II turbo kit will get you there. hell, a T28 at 14 psi could hit 12s with a nice clean pass.

remember, with only around 2500 lbs to lug around, it doesnt take much to make our cars scoot.

also, buy the JWT turbo ECU with correct injectors (depending on your HP goals)

talk to JWT, they will lead you in the correct direction as far as computer tuning goes.

Hehe yea, ive gathered ecu wise that jwt is the place to go. Thats a pretty damn good time ***. I read someone else's sig on another site saying their turbo 200sx ran 13's at 19 psi. I guess its driver skill... but sadly i don't have a whole lot of experience with manual transmissions. And im definitally not very good at launching. But hell i guess thats the challenge anyway :D Good to know its possible. What i would kinda like is some expandability. It seems like around 15 pounds would be good, but id like to be able to put in some race gas and crank up the boost if i felt like it, or maybe add a little nitrous at some point.

Ive been told the stock internals are good for up to 15 pounds, but im still looking for confirmation from a few sources. Id like to know what kind of internals it would take to go up to 20, 25, etc. I know it doesn't take much to go fast, but im just trying to get a grip on how much room i'll have to expand before having to switch out all kinds of parts. Truthfully i have a feeling i will be MORE than happy with 15 pounds. So i'll probably shoot for that. I just needa do some more research... if it doesn't cost much more to kick 15 up to 20, then maybe i'll go for it. If not, then fine ;D

Anyone wanna throw out some educated guesses on hp and torque numbers for those different levels of boost?

Forget JWT ecu, go e-manage with a g20 ecu. Having your rev limiter at 7500 is plentiful and no speed governor. E-manage is great and as close as you can get to stand alone without actually buying stand alone. You wont have to wait 1 month to get your ecu back after every little mod, like swapping maf's. With E-manage just a click away. E-manage is around 500 + 100 for a g20 ecu is just as much as a jwt ecu

and then you better hope you have a very good tuner. I don't even trust lingenfilter to tune a car (met a guy with a car tuned by them, idiots). So after spending $500 for the emanage, $100 for a used G20 ecu, and a couple hundred bucks dyno tuning it, you have a car that can potentially make more power than a JWT ecu provided that you have a very good tuner who knows exactly how the emange interacts with the stock ecu.

The internals are good for an easy 15 psi. A number of guys have made over 400whp on stock DE internals. Somewhere around 20psi, you need to consider a new head gasket and stronger internals.

For trap speeds of 110mph, you only need about 250-260 whp which is doable with a t25/t28 setup with cams at 9-10 psi. On street tires with a 2.2 60'ft, that's about a 13.25-13.3. On slicks, you can run around 12.8.

The S-15 doesnt have VVL. It has variable intake cam timing or some shit.

You gotta be fuckin kidding me. 2002!!?

^^^^ seriously.......whats up w/ all these OLD A** threads popping up??
are the noobs not aware of a thing called a date???

Plenty shops in my area (Chicago Land Area) that have shops that dyno tune using e-manage. Several have had experiece with sr20's. I also think you can find enough information on this forum and ask people who have e-manage who are running high hp #'s for help.

damn, this junk is old. i need to check the date before i reply to a thread brought back from the dead :eek2:

^^^ B14 SE-Rious is the one who brought it back and continues to post on it...oh well

^^^^ seriously.......whats up w/ all these OLD A** threads popping up??
are the noobs not aware of a thing called a date???


HAHA, at least he searched........ :D

Forget JWT ecu, go e-manage with a g20 ecu. Having your rev limiter at 7500 is plentiful and no speed governor. E-manage is great and as close as you can get to stand alone without actually buying stand alone. You wont have to wait 1 month to get your ecu back after every little mod, like swapping maf's. With E-manage just a click away. E-manage is around 500 + 100 for a g20 ecu is just as much as a jwt ecu

This is such an old post man! :)

We just can't make you guys happy hahaha. You say search, then they search you say DONT POST WHEN YOU SEARCH!

We just can't make you guys happy hahaha. You say search, then they search you say DONT POST WHEN YOU SEARCH!

But did he search to give an answer to a thread that is so old that the people probably don't need that information anymore? Searching is great, responding to old threads kinda give that WTF is going on deal. ;) I'm just wondering why he searched for this thread and then posted his comments in it. :)

Where the fuck did my post count go?