rb20 ftw

[EpicFail1423]

okay, we all know the stock turbo on the 20 isn't good after 14psi due to the ceramic wheel and limited airflow. i've done a little looking into it and the flange is a t3 on the stocker.

here's my quandry: my research has shown that the stock turbo on dsm's is also a t3 flange.there are an abundance of direct-fit turbo upgrades out there for dsm's.has anyone tried any of these upgrades and gotten good results?these turbo's are usually relatively cheap for say a big 16g. looking at what the goals i have for the rb are (~280whp) these turbos fow enough air. i just haven't heard much about people using these mitsu turbos on an rb.maybe my research was off and the flanges are different but i'm pretty sure they're the same and it'll work if you just clock the turbo to fit around the fender.

does anyone have any information on these turbos' fitment and performance for this motor? i'd really rather keep the stock exhaust manifold (bc my restricted self doesn't want to go balls out on this motor) especially seeing as it's cast.

now, don't flame too bad as i'm pretty much a:newbie in the rb department but i'm 100% dedicated to doing this right so i don't regret it down the line.

thanks guys, and i'll keep the posting to a minimum (unlike the other "HEY GUYZ I'M NEW TO DA FORUMZZ") in an effort to prevent cluttered forumness.

[DriftingisLame]

DSM's have t25 flanges. Rb20's have t3 flanges.

If you want a bolt on mild upgrade look into an rb25 turbo. My roommate made 258 whp and 260 tq @16 psi. I advised him not to run that much boost but he was convinced that the turbo is flowing less air at the same PSI when changing from the 25 engine to the 20, due to the lower displacement. He sounds right, but if you're concerned about longevity, run 14 psi or less. 250 whp with similar torque is fun.

Good luck

[EpicFail1423]

okay man, thanks a ton.there's a lot of decieving info in the web so i wasn't sure if that was 100% true.

anyway, 250whp i can live with bc i'm not making a "ZOMG DORIFTO MACHINNEEE" fanboy-mobile. i just want a fun and quick (not stupid fast) car for the weekend. i can always go bigger later

has his rb25 turbo held up pretty well as far as a dd is concerned?and one final q, does this upgrade require anything beyond upgraded injectors and fuel pump?

any info in this matter is gonna help me.

[the_garynator]

I'd recommend an rb25 turbo, gtr injectors (with the resistor pack), a walboro 255, and an emanage blue (since I'm guessing you don't want to sspend a bunch of money on a standalone).

you probably will want a nismo fpr also, but it isn't required (I'm not running one atm and i don't really have any issues). You may also want to invest in a wide band also. I picked up an innovative motorsports LC-1 for $200 including sensor. You can connect it to the emanage blue and datalog afr along with everything else which makes tuning a breeze.

I'm assuming you already have a boost controller.

If you have any questions or want to know more about my setup, shoot me an email.

[Carl H]

why spend the coin on an emanage (or any inteceptor for that matter) when you can get a proper chiptune that is actually mapped for more than 7psi.

[RBcoupe]

dsm turbo flanges are nothing like any t2 or t3 flange... that and dsm turbos mounted backward, so it would mount all goofy...

[EpicFail1423]

dsm turbo flanges are nothing like any t2 or t3 flange... that and dsm turbos mounted backward, so it would mount all goofy...

it was an honest mistake.but the turbo isn't really mounted backwards, the flange is beneath the manifold and the inlet points left. i dk what backwards you mean, but it doesn't really matter anyway.

and i was looking more into a chip than anything simply because i don't really need all the tunability right now as i'm only going to be using this car as a weekend car so 1 map will suffice. don't you do those as well as wiring harnesses Carl?

i'm mostly just doing a few mods here and there to squeeze some more power out of the motor. i'm shooting for around 250whp.so it's looking like basic reassurance stuff like a fresh rebuild and making sure there isn't any internal damage.then i'll replace the belts and whatnot before my actual "modifying" begins. it's gonna be relatively minor stuff as stated before.(rb25 turbo, injectors/resistors, fuel pump, boost controller, wideband, chip etc.)that, and i want to get the engine painted so it doesn't show leaks.

all of this stuff is a little premature but i'm making sure i'm doing EVERYTHING right so it'll be reliable.

i still haven't really checked out the cooling solutions (as far as stuff i'll need to do) but it'll come in time.

also, does anyone know if it's a total PITA to vent atmospherically or just recirc it? opinions on this?

thanks everyone, when it i get all my stuff, this will eventually be my build thread. this stuff takes time on my kinda budget but it's nothing i'm gonna rush

ps. i'll have plenty of pictures for the pic whores in all of you (read: us)

[the_garynator]

why spend the coin on an emanage (or any inteceptor for that matter) when you can get a proper chiptune that is actually mapped for more than 7psi.

This would be a better option in some cases, yes. But the way I look at it is that unless you can reprogram the ecu yourself or are not going to do any mods to the car, you're going to have to spend money everytime you do any mods. At least with the emanage, assuming you have a wideband or access to one, you can tune the afr's yourself. For example, if you upgrade your injectors, you can plug the new size into the emanage, do some datalogging and get the afr's where they need to be without having to bring the car in or send the ecu out to get reprogrammed.I agree, getting the ecu chipped and tuned is a better route to go, but it also has it's downsides as does the emanage route. I know the emanage is basically just a safc and blah blah, but have you seen the prices on safc's?! the apexi neo or whatever is like $370...and only adjusts the maf signal (you know what I mean), whereas the emanage can do timing too.I know I'll probably get flogged for it, but I think the emanage is under rated and has a bad rap. Anyway, either option would work just fine imo, guess it depends on your situation. I know I prefer the emanage to a chipped ecu in my situation although if I ever get around to learning how to reprogram the ecu's (or get around to getting a standalone for that matter), that will probably change.

[the_garynator]

also, does anyone know if it's a total PITA to vent atmospherically or just recirc it? opinions on this?

I run vented to the atmosphere. Not really an issue, just have to change your shifting habits. you either have to shift pretty fast or shift pretty slow, there's a small window of time between when you let off the gas and then get back into it that it will stumble...I hardly ever have this happen to me anymore, you get used to it pretty quick.

It also helps to have everything up to par (like voltage; plugs; tune; vacuum; etc), it won't happen as easily and/or won't be as noticeable if everything else is running good.

[Yellow4g63]

This would be a better option in some cases, yes. But the way I look at it is that unless you can reprogram the ecu yourself or are not going to do any mods to the car, you're going to have to spend money everytime you do any mods. At least with the emanage, assuming you have a wideband or access to one, you can tune the afr's yourself. For example, if you upgrade your injectors, you can plug the new size into the emanage, do some datalogging and get the afr's where they need to be without having to bring the car in or send the ecu out to get reprogrammed.I agree, getting the ecu chipped and tuned is a better route to go, but it also has it's downsides as does the emanage route. I know the emanage is basically just a safc and blah blah, but have you seen the prices on safc's?! the apexi neo or whatever is like $370...and only adjusts the maf signal (you know what I mean), whereas the emanage can do timing too.I know I'll probably get flogged for it, but I think the emanage is under rated and has a bad rap. Anyway, either option would work just fine imo, guess it depends on your situation. I know I prefer the emanage to a chipped ecu in my situation although if I ever get around to learning how to reprogram the ecu's (or get around to getting a standalone for that matter), that will probably change.

A realtime board and software = 260ish. I use to use the Emange back in the day because access to the ecu wasn't available. This is just like the Emange cept its easy to tune with. http://www.nistune.com

[the_garynator]

A realtime board and software = 260ish. I use to use the Emange back in the day because access to the ecu wasn't available. This is just like the Emange cept its easy to tune with. http://www.nistune.com

Oh, that's really cool, how long ago did that come out? I'll keep that in mind as a potential alternative to going standalone (depending on what I end up doing for mods).

This is definatly a better option. I apologize for my out of date knowledge.

[Yellow4g63]

I think 3 years now. He is always updating and fixing bugs and adding new features to the software.

[EpicFail1423]

i remember reading about the nistune thing a while back and it looked to be a pretty good option.

i'm kinda in the position where i need to start learning more about different maps and stuff because computers definately aren't my thing at the moment.

i guess it's mostly going to depend on what you want the car for and if you're going to need more than one setting (whereas i am not).

this thread has helped quite a bit.

while i'm here, i might as well ask about the gtr injectors. do they drop right in (after you wire in the resistors)? i was kinda under the impression that the different series of gtr's would have slightly different injectors (ie flow rates, sizes, fitment, etc) from each other and from the rb20. but then again, i also stated i'm pretty new to this lol

thanks guys, it's been a huge help so far NICOnauts FTMFW

[the_garynator]

i remember reading about the nistune thing a while back and it looked to be a pretty good option.

i'm kinda in the position where i need to start learning more about different maps and stuff because computers definately aren't my thing at the moment.

i guess it's mostly going to depend on what you want the car for and if you're going to need more than one setting (whereas i am not).

this thread has helped quite a bit.

while i'm here, i might as well ask about the gtr injectors. do they drop right in (after you wire in the resistors)? i was kinda under the impression that the different series of gtr's would have slightly different injectors (ie flow rates, sizes, fitment, etc) from each other and from the rb20. but then again, i also stated i'm pretty new to this lol

thanks guys, it's been a huge help so far NICOnauts FTMFW

should drop in. they are higher flow than the stock injectors, so you do needd to tune for them. they are 444cc vs the stock ones that are 270cc (or 260, i don't recall off the top of my head).

[black240jl]

i really need to get some injectors as well, how much do the gtr injectors runs? Where can you get them at?

[blues14]

rom tune, 440 deatch injectors fmic , walbro and an apexi turbo got me 320whp at 1.1 bar on my RB20. I still don't have specifics on my turbo, all i know is that it was designed as a bolt on upgrade for the rb25 and it kicks *** for its size

[Carl H]

^ how is the car doing by the way man...hadnt heard much from you after i sent that last chip out.either way 320whp at a touch over 14psi is not bad at all...oh i miss the small turbo days.

[blues14]

It's doing great.... Actually smoked a late 90's vette the other day...at the stoplight, the guy asked me what I had under the hood, I said " just a 2 litre" Fun stuff.