suggestions on turbo upgrade for RB20

[SimpleS14]

Okay...I did a bit of searching and I believe the RB20 has a T25 turbo with a T3 flange...please correct me if I'm wrong. I also found I can use the Z31 turbos and if I want...swap on the RB25 manifold.

My questions are....what do you suggest in terms of a turbo that will replace the stock unit and allow me to utilize the stock elbow, oil, water lines and IC piping? I saw the GReddy units...but that's $$$.

Also if I was to use a RB25 exhaust manifold...I have to use a custom downpipe..right?

TIA

[s14 2510's]

I have the same question. I know all the hks gt25 turbos will bolt up to the manifold. But what can I use for a cheper internaly wastegated turbo to make like 350 crank max and still keep the turbo in one piece. I dont realy want to buy a gt25- because of the price they go for and I have two rb swaps now. So I kinda gota bugit this one. O i would like to keep the stock exhaust mani if possible. Any ideas

[Bronze MFP]

HKS GT25 series turbos can be had for less on ebay if you feel safe about buying a used turbo. If you're shooting for 350hp, the HKS GT-RS turbo would bolt right up and be good to 350-400hp. Cheap and "bolt right up" will be pretty hard to find, sorry.

[Yellow4g63]

T3/T04E 50 trim with a .63 exhaust housing can nevar lose.

[SimpleS14]

Thank you for the reply Bronze MFP , I'm going to look into that. But if I remember correctly...isn't there more than one HKS GT-RS?

T3/T04E 50 trim with a .63 exhaust housing can nevar lose.

Thank you...so I'm assuming this is a bolt-on affair with no mods required?

Glad you didn't tell me to just search.

[Carl H]

gt30r ftw!

[side waz]

The HKS GT2530, 35 and 40 all bolt right up to the RB20 manifold and allow for the use of the stock oil/coolant feed and return lines. The HKS GT2540 will make close to 400hp however it's pretty laggy and not worth the added money over the 35.

It all depends on your budget and what your end goal is as well as what you plan on doing with your car. A series 1 VG30 turbo will also work great, bolts up, uses stock lines and is good for 20psi efficently. My buddy is running one on his Ceferio.

[RB20DETodd]

The HKS GT2530, 35 and 40 all bolt right up to the RB20 manifold and allow for the use of the stock oil/coolant feed and return lines. The HKS GT2540 will make close to 400hp however it's pretty laggy and not worth the added money over the 35.

It all depends on your budget and what your end goal is as well as what you plan on doing with your car. A series 1 VG30 turbo will also work great, bolts up, uses stock lines and is good for 20psi efficently. My buddy is running one on his Ceferio.

i like the sound of that vg turbine.

[SimpleS14]

Thanks again for the replies.

[Bronze MFP]

I don't know about the GT2535 or 40, but with the gt2530 you have to run a lot of boost to make power with it, where as the lager turbo's you dont. the trade off is spool time and heat.

[blues14]

you could buy a rb25 or vg30 turbo, have it machined and put larger wheels on it that will flow more air and still bolt right up. I have an rb25 turbo, havnt installed it yet cuz i am still playing with that idea. I got a quote for 600 bucks to do just that, but i am still thinking it through. I'm doing my fmic and fuel first, then i will worry about the turbo next year.

[Yellow4g63]

Thank you...so I'm assuming this is a bolt-on affair with no mods required?

It will bolt on to the manifold, but your going to need new oil feed lin and prob a drain too. The exhaust manifold needs to be modded for the external gate or you could run the gate off the exhaut housing like the DSM guys do.

[SimpleS14]

I have another question. Since I would be upgrading the turbo..I figure I have to upgrade the fuel injectors. I read I can use 7mgte injectors, but I have to wire in resistors (10 ohm?).

Are their any injector upgrades that are simply "plug-n-play" ?

Also read that if I use 550cc injectors....I can't tune the car with something like an S-AFC, but can I use an E-Manage?

TIA

[Yellow4g63]

I have another question. Since I would be upgrading the turbo..I figure I have to upgrade the fuel injectors. I read I can use 7mgte injectors, but I have to wire in resistors (10 ohm?).

Are their any injector upgrades that are simply "plug-n-play" ?

Also read that if I use 550cc injectors....I can't tune the car with something like an S-AFC, but can I use an E-Manage?

TIA

I'll let CarlH take this one. I think he was running the 7MGTE injectors on his 20. Yup resistors will be needed. since the stock size is 270cc and going to a 550cc the AFC might not beable to do a good job, but then add a Z32 maf and maybe..... but the Emange is way better but a chip and the AFC could work better. Chip the ecu for the new Injector size and use the AFC to adjust . Again talk to CarlH, I suck at Rom Editor... OH BTW CARLH that VE bin file you fixed for me seems to work pretty good... not sure about the A/F but I'm getting a little more MPG out of a full tank of gas.

[s14 2510's]

I plan to run my rb26 stock 444cc injectors in my 20. I have a set lying around so why not. The 26 and 20's use the same resistor do they not? I olney want like 300-350 crank max. Im just building this for a drift car.

[Yellow4g63]

I plan to run my rb26 stock 444cc injectors in my 20. I have a set lying around so why not. The 26 and 20's use the same resistor do they not? I olney want like 300-350 crank max. Im just building this for a drift car.

RB20 and 25 are high impedance not low like the GTR. You will need the resistor pack fromt the skyline or wire some inline.

[SimpleS14]

I'm actually going to see if I can get my hands on some NISMO 555cc injectors.

Here is the part number I got: 16600-RR420

I found it on this site: http://www.greenline.jp

I'm going to consider the GT30R turbo over the HKS...mainly because of cost and feedback I hear about it.

Thanks again for the help.

[rb240det]

I have another question. Since I would be upgrading the turbo..I figure I have to upgrade the fuel injectors. I read I can use 7mgte injectors, but I have to wire in resistors (10 ohm?).

Are their any injector upgrades that are simply "plug-n-play" ?

Also read that if I use 550cc injectors....I can't tune the car with something like an S-AFC, but can I use an E-Manage?

TIA

Yes you will need to wire in 10ohm 10 watt resistors if you intend to use the 440s out of the 7Mgte. Those are what I put in my 20. I also have a Z32 MAF and SAFC to correct for it, but I would highly advise getting your ECU chipped (like Yellow4G63 said). My SAFC is taking out way too much correction. I plan to get mine chipped for the injectors and MAF, and just tweak with the SAFC.