rhb5 on d16z6
 

would it be safe to put an rhb5 on a d16z6 with the stock injectors at say 4-5psi intercooled i have turboedit wideband and a burner so i have some kind of management, i would run this until i got some dsm 450s then up the boost to 8psi...

Re:rhb5 on d16z6
 

I would at least put an FMU on it if your leaving stock injectors.

Re:rhb5 on d16z6
 

is your car obd1 or 0? you cant use turboedit on a obd0 car. uberdata is the way, and it probably isnt safe to boost at all with stock injectors. just spend the 50 bux and get a set of dsms

Re:rhb5 on d16z6
 

4-5psi intercooled, might as well get an FMU... I have that same set-up except I run anywhere from 5-7psi (7 is the peak spike) and it runs safely. Even though the management (FMU) is shitty it can handle the 5-6psi, but definitely look into getting 450's with some better management.

Re:rhb5 on d16z6
 

an fmu should only be ran to get u to the dyno. they do work,i ran one. but if u waunt to make more power,and do it safely,and u want ur motor to last, get it tuned.

Re:rhb5 on d16z6
 

too small a rhb5 is too small for a ------ weedwacker

Re:rhb5 on d16z6
 

yea i agree waay too small

Re:rhb5 on d16z6
 

you mean obd1 :P........and yes don't be cheap and get the injectors since you already have a WB and burner

Re:rhb5 on d16z6
 

damn, im just getting impatient i needed to be talked down thanks, from what i understand an rhb5 is a pretty good size for a d16 not too small, but still not big at all (a good size for the street), i am fully capable of tuning it but i guess i still have a lot to learn about boost and injector size i needs me some dsm 450's...

Re:rhb5 on d16z6
 

there aren't many smaller turbos than a rhb5. I should know, I had one.

Re:rhb5 on d16z6
 

that turbo is hella small and spools super fast but takes a crap early in the rpms bc its so damn small, put it on your 4-wheeler or geometro, dont bother putting that on a d16, id run either a 14b or T3, something with a little size to it

Re:rhb5 on d16z6
 

boost lag = traction control especially on the street

you'll be much better off running a 14b or like a t3 60/48 if you want power.

just that little bit of lag will save your tires and be a lot better on the street.

Re:rhb5 on d16z6
 

I say run a bi turbo set up. ihirhb5 to get her movin, t60 to get her really movin

Re:rhb5 on d16z6
 

Agreed, if I were in your situation I'd go with a t-25, 14b, something along those lines.

Re:rhb5 on d16z6
 

even t25s are junk, 14b at the smallest, t3 is optimal though

Re:rhb5 on d16z6
 

a t25 is actually smaller then an rhb5, but since all i have right now is the rhb5 i think i will be stickin with that until i have the cash for a fresh t3...

Re:rhb5 on d16z6
 

Actually...The T-25 is quite a bit bigger than the little bitch ass rhb5. I have 2 t-25's sitting in my garage and a rhb5, and I've ran both on my car. The RHB5 is small as ---- compaired to the t-25. I'll snap up some pictures if you'd like.

Dont even waste your time with the rhb5, put it on ebay. Get a T3 so that when you get the manifold made it is the standard t3 flange and you can then swap it out for bgiger ---- down the road.

Re:rhb5 on d16z6
 

i have seen the rhb5 and t25 compressor side turbines laid next to eachother the rhb5's turbine is noticably bigger...

Re:rhb5 on d16z6
 

I hate that turbo, cant wait to get a t3 :-\

Re:rhb5 on d16z6
 

rhb5:
http://www.sunfox.net/rhb3.jpg



I can't find a picture of the t-25 but im sure someone else can throw it up



the rhb5 is tiny as ----.

it doesn't even matter anyways. both are too ------- small..period.

Re:rhb5 on d16z6
 

im havin a hard time here im at a cross roads, everything i read the guy at turbo center (whos been rebuilding turbos and tuning turbo cars for 20 years) has said that an rhb5 is adequate for a 1.6L yeah its small but, it came stock on an engine that was 2.2L so it cant be too bad i am aware that it drops off at 7000rpms but i can deal with that...

Re:rhb5 on d16z6
 

adequate for a 1.6L? if you want your ---- to spool at 1400rpms and make 140whp?

im by no means the best persont o talk to about turbos and i bet that guy is good at what he does but look at projects and other people's cars here on HMT.

You're running the d16z6. PERFECT example of a setup, and one that is very popular, BBKA's/Pats setup. he is pushing 230whp on a stock d16z6. pretty sure he isn't running a rhb5 to mkae 230 to the wheels (he is actually run the 60/48)

so you need to awnser the few little simple questions:
- What is this going to be used for(autox, 1/4mi racing, freeway racing, etc)?
- How much power do you want to make?
* What do you want to spool at?
* Do you want more low end power or top end power?
- How much money do you have to spend on it.

What brand of manifold do you plan to use on this seutp? hf, log, some other cast brand?

I personally would rather not see any boost until 3500-4000 anyways becuase after that i know it is going to kick ya right in the ass. Then again, i'm more of the type for freeway racing and ----.

You should seriously consider either like a 14b or a 60/48(i'd really suggest the 60/48 becuase of the "standard" t3 flange setup)

Re:rhb5 on d16z6
 

what did the engine it came on red line at? and just b/c it came on it did not mean it was necessarily adequate. it just made it turbocharged.

Re:rhb5 on d16z6
 

all of you are making good points, im not saying its not small and im not saying i wouldnt be better off with a t3 im just saying i think its fine for now to start out with then i can step up to a t3 (which is what i planned to do) im pretty handy so making adapter plates is not a problem right now i just want something that will give me a little more power and right now the rhb5 is what i have to work with..

Re:rhb5 on d16z6
 

do you already have the turbo? Id just get a t3 if you havent got a turbo yet. NOT the fact that you need a DYNO QUEEN turbo like everybody on HT and most of the people here. T3 will give you plenty of options that you dont have with say ihi or mitsu. You can upgrade later without changing the mani/adapter. Im using a small turbo right now and i have an larget turbo in my room that i will swap in one day. Besides, the rhb5 is a pain to rebuild, i know because i tried :-[

Re:rhb5 on d16z6
 

rhb5 is small, but use the cold side from a 2.3 Ford T-bird (IHI only) and that will at least get you up over 200whp.

It gives me 262wtq, keep's me happy for now.

Re:rhb5 on d16z6
 

same here i'm ordering my adapter plate from WeirRacing for an IHI Subaru RHB5, everyone tells me to go T3 but i'm running a D15B7 with "toothpick" rods so i won't be revving past 6K and even N/A right now i rarely go past 4K, i already have a .42/.48 T3 but decided to use the IHI. One more thing the Subaru IHI has a bigger compressor wheel then the ISUZU IHI from the impulses that are turboed, the exhasut wheel and center is the same. Are you using a probe/mazda IHI? i would like to compare the probe to the Subaru IHI.

Re:rhb5 on d16z6
 

the rhb5 is a garbage ass turbo. you definitely need a small t3 at the least.

Re:rhb5 on d16z6
 

then i would do it. nuff said :)

Re:rhb5 on d16z6
 

heres a couple of pics of the turbo i have rhb5 came off of a ford probe i dont have to worry about rebuilding it cause i dont plan to(i hope to have somthing different eventually), but my friend is doing the same setup on his car 91 hatch with a d16y8 and he got his turbo rebuilt for $250 his turbo was in pretty bad shape though, i think he should have just bought a t3...

http://stolle.servebeer.com/turbo/turbo%20001.jpg
http://stolle.servebeer.com/turbo/turbo%20002.jpg

Re:rhb5 on d16z6
 

EDIT: my turbo came from a mazda 626 im pretty sure its the same as a probe turbo though...

Re:rhb5 on d16z6
 

turbo looks mint......it's not that it's a bad turbo but you'll get sick of it and upgrade anyways :P

Re:rhb5 on d16z6
 

question....will that turbo clear for A/C? will any turbo on a H/F clear? ???

Re:rhb5 on d16z6
 

with the right mani that turbo can easily clear a/c

Re:rhb5 on d16z6
 

but on an HF manifold

Re:rhb5 on d16z6
 

its been done, its all in how you make the adapter.

anyway, if it was me i would at least sell that turbo and get the ihi off of a turbocoupe, that way you will have a t3 flange and upgrading will be easier. Actually if it was me i wouldnt waste my time with little turbos, they annoy me (when i had an ihi it was spooling 4-5 psi on the highway which is where i do most of my driving)

Re:rhb5 on d16z6
 

canyou elaborate some on "its allin how you make the adapter?" i wanna run a Hf b/c they're cheap but i wanna keep my AC...

Re:rhb5 on d16z6
 

Where the adaptor plate will positon the turbo to clear a/c or not.

Re:rhb5 on d16z6
 

technically couldnt you make an adapter that instead of being a plate is a pipe with two flanges on it if you made a flange for the hf manifold and used mandrel bends to basically place the turbo wherever you want...

Re:rhb5 on d16z6
 

technically, but oil line placement as well as placement for piping is key also

anyone have pics of this hf mani turbo with a/c?