just wondering what you guys think about the IHI RHB5 on my D16Z6?...compiling turbo parts together...so yea thnx!

 

anyone?

 

made it for my friend but his car got repo'd, 350$ for the manifold and turbo together.

 

 

It's pretty small, and once you slap it on, you might regret it.. I'm running one on my B18A1, and while it spools up relatively quickly, it starts loosing steam at around 10 psi. A small turbo isn't really the best - some tools might tell you otherwise.

Corky Bell's "Maximum Boost" book is seriously a worthwhile read: it'll tell you all about turbo sizing and building your own setup. Basically, you'll make much more heat with a smaller turbo, create more restriction, and the compressor will begin heating the air at higher boost. Plus, you might think the same way, I regret having a custom manifold made for the RHB5 flange. If you go with a T3, you'll be able to upgrade to a T3/T4 later without swapping flanges/manifolds. I hear Precision turbos are good too, you might look into those.

Bottom line: I don't recommend the RHB5, even to a smaller D-series.

 

well the IHI turbo i have has a t3 footprint on it so in the future its possible to swap it out for a t3 turbo. on HMT they stated it was an excellent turbo for the 1.6L D series

 

so the RHB5...typically sux?!

 

 

ISHI warner RHB5 flows enough for about 200 hp.. thats it.

 

i have this same turbo, but i havent put in on yet. does anybody know how i can hook up some waterline as well as the oil line i'm fairly new to the whole forced induction setup or is there a nice write up with somebody using this turbo? thank in advance

 

also does anybody have some spec on this turbo such as the measurement of the intake and exhaust sizes and how much it can boost or internaly regualted as to psi

 

i used to run the ihi rhb5 turbo on my d16y8. spool was fast but it died off very quickly. i regret putting it on but it was a good experience. now im running the 14b and i love it. fast spool and pulls to redline.

 

 

well i'm not familiar with that turbo it self but i have a Apexi turbo kit and the number and powerband I have seen are idea for DD setups

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FallenEGsi &raquo;</TD></TR><TR><TD CLASS="quote">just wondering what you guys think about the IHI RHB5 on my D16Z6?...compiling turbo parts together...so yea thnx! </TD></TR></TABLE>

Theres so much that plays into this question man...

what kind of #'s are you looking for? What do you have done to your motor. Any future plans...

More info on what you want to get out of your setup and less worrying about others opinions.

 

ok- my best friend has an rhb5 on a 1998 vw golf 2.0- he was running as much as 13psi on it at one point and it was smoooth as smooth could be, however he only revs it up to 6 grand. from what ive seen/heard, it wont make/hold power much above 6 grand. its a beautiful bb turbo, but its just a little too small for a d16 i think

 

I have messed around with undersized turbos on sohcs before. never again. I would rather have my current T3 at 5psi than my t25 at 10. Honda engines make power up top. If you add power on top of this natural curve you have a motor that is fun to drive. if you make it peak at 5k and fall on it's face past 5500 you made a motor that is very disapointing to drive IMO. Small turbos just make the car feel faster than it is because of the huge bump in to middle. 1.8t VWs feel like this stock, nice pull down low then...nothing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch &raquo;</TD></TR><TR><TD CLASS="quote">I have messed around with undersized turbos on sohcs before. never again. I would rather have my current T3 at 5psi than my t25 at 10. Honda engines make power up top. If you add power on top of this natural curve you have a motor that is fun to drive. if you make it peak at 5k and fall on it's face past 5500 you made a motor that is very disapointing to drive IMO. Small turbos just make the car feel faster than it is because of the huge bump in to middle. 1.8t VWs feel like this stock, nice pull down low then...nothing. </TD></TR></TABLE>

I agree, even if it's for a different reason: Larger turbos are better than smaller turbos for almost every application you could be thinking. My RHB5 spools up pretty quickly, full 7-8 psi of boost by about 3k rpm, depending on gear, but like some other people say, it starts falling on its face in the higher RPM's. If you're using it though, it's decent to start out with - especially if it has a T3 flange.

There should be two banjo-style fittings coming off the center cartridge. These should be close together - one is coolant in and one is coolant out, but it doesn't matter which is which, either way will work. What I did was splice fuel line (I think 1/4" ID fuel line, I might be wrong) into the coolant line that runs to your throttle body. Use striaght plastic heater hose connectors when needed.

If you want a more detailed write-up, PM me and I'll help you out. I could probably get some pictures in the next week or so if you need.

 

Would be a great turbo for a daily driver. Instant spool, so low end power is great.
Definatly not a great turbo for maximum power though.
I have a spare IHI RHB5 that im putting on my CBR F4i this summer.

 

well i will be running this turbo on my jdm d15 wold 7 psi be too much. i want to have a little fun but i dont want to blow my motor doing it what would the safe amount of psi be on that motor?

 

bump

 

You'd probably be ok with 7psi, but you need to have some sort of tuning, SAFC or otherwise at the least. With the RHB5 though, you'll generate more heat staying at 7 psi than you would with a larger turbo, and therefore detonation will come by a little easier, even if just a little.

 

sorry guys to keep asking so many damn questions on this topic but like i said i'm a little new to the forced induction topic. as to people with this set up what intercooler is best to get to use with it, as as fitting it into the engine bay/ bumper area. thank i'm sure i'll have more questions before long for all the good feedback

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lazerus &raquo;</TD></TR><TR><TD CLASS="quote">ISHI warner RHB5 flows enough for about 200 hp.. thats it.</TD></TR></TABLE>

I think that's an erroneous figure to name. I mean, are we talking the VJ11 or VJ12 trim that came on the Subaru EA82T, the VJ16 off the 87-88 Ford 2.3T, or the VJ32 which I think is an aftermarket only compressor?

The early Suby turbo might get you 150 whp, they never dyno anymore.

 

the one in the picture is the biggest trim wheel off the ford 2.3, which flows probably enough for 220-250 WHP.


you're right, i probably should have mentioned the different ones. i was just mainly thinking about the one off the impulse RS which is good for ~200 or so...