IHI RHB5 VF28, on b20b, in DA
 

I just traded a kid my wings west kit off my rex for and IHI RHB5 VF28 off a wrx, with a cheap BOV, feed, and return lines, a boost gauge, an HF manifold with an adaptor flange

My question is minus the manifold (obviously) is this a good starting point for a first time turbo setup, it is the low compression B20B i just put in My DA, went to the track last night and was running a shitty 15.6, but it was also very hot out (90+) it should run 15.5-4 I also have an MSD cap, and ex coil and a B&M fuel pressure reg, and gauge, and a strong clutch, gutted AC, ect

I want to run 13's, MID and have about 190 WHP, the turbo is in good shape, No shaft play at all, but one of the blades has a small chip in it, and the turbo exhaust flange has a piece missing where it bolts to the manifold (the cast broke cause some jack ass tightened it to much)

should i keep the turbo and build off of it or sell it to someone with a ZC swap with the manifold and get a fresh T3?

the turbo...http://i96.photobucket.com/albums/l1...r07/car011.jpg

before the B20 and MSD
Attachment 24733

thanks guys!

Re: IHI RHB5 VF28, on b20b, in DA
 

anybody? is this a good setup?

Re: IHI RHB5 VF28, on b20b, in DA
 

10lbs on that thing might get you 200hp, but its a really tiny compressor. stock ej20's push 14lbs and only make 227 at the crank. ive seen lightly larger turbos make 200hp very easily at 6psi on b20's.

Re: IHI RHB5 VF28, on b20b, in DA
 

may be 2 small for b20 ??? was quick spool on my d16 with stock exhaust ran out of breath on me high rpm but that was the rhb5 off the probe

Re: IHI RHB5 VF28, on b20b, in DA
 

you might want to have the feed on top and the drain on bottom......




what is your the whole number on the compressor housing ? how many bolt down pipe does it have ?

Re: IHI RHB5 VF28, on b20b, in DA
 

That is as much a reflection on the EJ20's ability to drink intake charge as it is the turbo.

Re: IHI RHB5 VF28, on b20b, in DA
 

low compression b20s dont make a ton of power either ;)

Re: IHI RHB5 VF28, on b20b, in DA
 

Sure they do, don't listen to V-Tech hype. It would break 200 whp at or around 7-8 psi, stock engine and IM with 2.5" charge pipe and exhaust.

I really should drag out the Greddy SOHC kitted LS that made 181 whp and 200 wtq at 5.5 psi to illustrate my point.

Re: IHI RHB5 VF28, on b20b, in DA
 

i wasnt kidding when i said my buddies LS also made 200 on 6 psi and almost 220 on 7

my point was only that those numbers arent overly high. the non vtecs largest shortcoming is its cam and the low CR b20 has a cam so small it makes stock b18b cams look like a hot set of regrinds

id think youd know JD that id be the last one to be a vtec nutswinger ;)

Re: IHI RHB5 VF28, on b20b, in DA
 

People who compare LS cams across the years generally lack a clue, IMO. Have you ever swapped the "worst" cam for the "best" one? Not worth the effort, the difference is -----all.

Re: IHI RHB5 VF28, on b20b, in DA
 

i've personally done the cam swap in 2 b20's i dont think it adds any more power it just kinda makes the top end a little better i guess but do i think its worth it ?? if you got ls cams sure throw em in but its not worth purchasing.......


the problem with most people is they put in a b20 then try reving to 7k and wonder why there car dosent pull. well max hp is a 5400 rpm and over revving that motor makes it fall on its face.

i never understood why peole do this swap take out your 140hp ls to put in a 126 hp b20 seems dumb to me

Re: IHI RHB5 VF28, on b20b, in DA
 

agreed

Re: IHI RHB5 VF28, on b20b, in DA
 

Sell the whole setup. Cause you'll have to mod the manifold to work with your B20 or make a manifold to use that retard IHI flange. Then come time to upgrade to a real turbo, your stuck with a manifold that can only use that flange. Yeah you can upgrade to a STI turbo or go with something aftermarket that uses a IHI flange. Overall just mod the manifold and use the whole setup or sell the whole thing. It would be a sweet street setup as boost would hit like yesterday and alway at tap. I say use since you got it already.

Re: IHI RHB5 VF28, on b20b, in DA
 

ive done this myself, it was pretty stupid. the b20 wouldnt accelerate at all after 6500.

as far as the difference in cams goes the smaller b20 cams are what make those engines so useless over 6k. JD have you actually measured the difference in the cams? i have and the intake cams have less than 9mm lift on the intake side (b18b have 10mm gsr have 10.5, ctr have like 10.9 i think). b18a vs b18b vs b20z there all basically the same who cares but b20b cams suck bawlz plain and simple.

i agree on the whole sell the setup idea, i would at least opt for a t3 60 off a GN, SVO or supra. at least then your working with t3 flanges so upgrading is easier.

Re: IHI RHB5 VF28, on b20b, in DA
 

what are the # on the compressor housing.........there are like 400 different vf28's soooo

Re: IHI RHB5 VF28, on b20b, in DA
 

Nope, and I don't care to. I'll never own a B20B/Z bottom end, and every LS head that comes to me gets Deltas at the very least.

Re: IHI RHB5 VF28, on b20b, in DA
 

i plan on swapping an LS head with port work, crower valve train ect.., the b20 was cheap,and fresh, High Comp b20's have great power but are harder to find, my LS poped, and I didn't want to throw another shitty high millage ls, the b20 def has more low end tourqe, but definalty lacks top end, I"M NOT BUILDING A RACE CAR, I wan't a really fun daily driver that I can get great RESPONSE out of for autocross, and ocasional drag racing, if it runs 14.0-13highs i'll be happy the key is cheap, i have a 2.25 exhaust resonator (no cat) my car is obd1 so it should be easy to tune, I plan on running 450cc dsm's, a healthy sized FMIC, 2.25-2.5 in charge piping, FUN RESPONSE, I'm also building an FC with a small block chevy swap, so i just want a fun street car on the side

Re: IHI RHB5 VF28, on b20b, in DA
 

the numbers are vf28511

Re: IHI RHB5 VF28, on b20b, in DA
 

i could be wrong but isnt that a old school legacy turbo i got the vf28510 and its ------- dinky it falls on its face on my sohc so your b20 will not like it at all max boost at idle then fall on its face at 3500

Re: IHI RHB5 VF28, on b20b, in DA
 

just tell him it will work thats what hes waiting to hear.

Re: IHI RHB5 VF28, on b20b, in DA
 

The power will flat spot instead of continuing to increase. If it makes 200 whp from 3500 to 7000 it will feel slower to the butt dyno than something that makes 200 whp near redline as a larger turbo would... And it would be substantially faster than the peaky setup due to a broader powerband. Its not a cut and dry matter.

Re: IHI RHB5 VF28, on b20b, in DA
 

You need a different manifold. HF will not fit a B series head.

Re: IHI RHB5 VF28, on b20b, in DA
 

x2 plus you need to clock the compressor housing and center section. Get a good set of ring clamps and eat your wheaties. The snap rings are a bitch

Re: IHI RHB5 VF28, on b20b, in DA
 

There's no snap rings on that turbo

I had one just like it and Everything is bolted on. I broke all four of the bolts and re-drilled them out and threaded the housing with 3/8-16 Tap. A torch and pb blaster just wasn't enough, but yours might not be rusted bad.

Re: IHI RHB5 VF28, on b20b, in DA
 

good job on pointing out what the noob already said

Re: IHI RHB5 VF28, on b20b, in DA
 

It's an amazing day when osomulletude defends a n00b. Then again, it seems like a promising n00b who's here to learn instead of be an annoyance. :)

Re: IHI RHB5 VF28, on b20b, in DA
 

god damn right i'm hear to learn, i want to build something that's going to work, I've been into honda's for a while, done all my own work, swaps ect, not about to let someone else build a turbo setup for me, just pickup what info i can from guys that know more than me about it and get my hands dirty, I ride in my buddies twin cam ZC'd turbo is what got me going on this

Now, if i'm not impressed with this turbo performance can i upgrade to an STI turbo later on, i believe it's a VF34? from what i gather IHI's all have a gay "tri-flange" setup I plan on modifying a b-series T3 mani to work with this flange style, and i would probably have to modify the down pipe flange, and inlet for the intake, is the VF34 alot bigger than the VF28? Thanks for all USEFULL information, and feed back, I appreciate it

Re: IHI RHB5 VF28, on b20b, in DA
 

yes the vf34 is a sexy turbo. its bigger and better in every aspect of the word. you might want to run a external waste gate when you do decide to run it though the stock is set pretty high for a b20

Re: IHI RHB5 VF28, on b20b, in DA
 

I also have a low compression b20b. You should just sell the manifold and turbo setup to someone with a sohc. Buy yourself a cheap turbo off ebay run an oil restrictor and boost 10 psi. My set up is as follows,

Internally stock B20B
Victor X manifold
Tubular turbo manifold
Ebay Turbo t3/t04e .57 trim 50ar cold/63 ar hot
ebay charge pipes
greddy type r bov
tial wastegate
sds extra injector controller
USDM ys1 trans
chipped ecu rev limit 8200

car has run 12.3 @ 115mph
Been boosted for about 10 months now.

Re: IHI RHB5 VF28, on b20b, in DA
 

those are pretty impressive numbers, i'm weary of ebay turbos though as i am going to be driving the car alot and counting on it's reliability, i think i will sell the IHI setup but am more leaning toward a DSM 14B ,

also i found a pretty good deal on RC 310cc injectors would these be sufficient for a turbo setup like mine or should i go for the DSMs instead, they are cheaper...

i since have swapped ls cams in the b20 and ran a couple 15.2s which i think is pretty good in a heavy DA the cams picked the midrange up pretty good but any way, 14B, RC 310cc's?, and who wants a VF28? haha

Re: IHI RHB5 VF28, on b20b, in DA
 

Forgo the 14b. From owning both a DSM and a Wrx I can tell you the 14b isn't much bigger than the vf28 is. Also, I've done a 14b on an LS before, they definitely run out of steam quick. VF34's are a sexy piece, but expect to pay around $500-600 for one used. Better bang for the buck would be a big 16g if you want to go with the availability of DSM parts, and there's even a few companies that make b-series manifolds that mate to the 14b/16g foot print. The ultimate cheap 16g would be the newer Evo7/8 16g6 9.8cm^2, but the twin scroll foot print makes diy manifold making a pita. So, to recap...big 16g, or go with the standard t3 60 trim or t3/to4e size.

Re: IHI RHB5 VF28, on b20b, in DA
 

thanks for the advice, there sure is alot of choices!

Re: IHI RHB5 VF28, on b20b, in DA
 

all of the TD05h 16G's that I found on ebay are also around 500 dollars, and it looks like the cold side is clocked right back at the head, i'm sure it would clear with a custom flange that imeadiatly faces it away from the motor, and it looks like it also has an internal waste gate set at 10 lbs?, It's starting to look like a T3 is going to be the most affordable option, do used 16g's in good shape usaully cost that much?

Re: IHI RHB5 VF28, on b20b, in DA
 

Re: IHI RHB5 VF28, on b20b, in DA
 

Re: IHI RHB5 VF28, on b20b, in DA
 

Ehh, those are both on the high side. If you can have someone make you a manifold that matches up to the Evo 8's 16g6 those can usually be had with the 9.8cm^2 hotsides for the under $250 mark. Evo guys doing build builds don't want them, and most other people don't want to have to bother with the funky twin-scroll flange. Either that or look for a decent t3...those should be quite a bit cheaper than the IHI's or brand new 16g's.

Re: IHI RHB5 VF28, on b20b, in DA
 

That 16g you listed is ching chong ----. Notice how they covered up the info tag with the stores ID, and it doesn't say TD05H on the front. they're trying to pass it as the real deal.

Re: IHI RHB5 VF28, on b20b, in DA
 

There's a reason Honda guys run Garrett T-series. They're cheap, have more than enough options, are cheap to rebuild, have a good resale value - and are easy to upgrade. 60trim T3 wheel too small for ya? You can upgrade for half the price of the turbo to a 60-1, etc.

IHI turbos suck, unless you enjoy a fast spool. Some of the subie turbos can pump out 300whp, but thats on a car with everything upgraded (jdm heads, etc) besides the turbo. For under $500 you can find a T3 60trim, or for a bit more, a 57trim t3/t04e.

http://www.rcautoworks.com/index.php...iewCat&catId=3

Re: IHI RHB5 VF28, on b20b, in DA
 

If you need a good DSM 16g go hunt around the DSM forums. You can get one in the $200-$300 range and it's a great street turbo for a 4 banger. It wouldn't be my 1st choice, but in the $300 range it's a hard turbo to beat. Once you have a DSM flange on your car you can then upgrade to any of the bigger Mitsu turbos (TD06H 18G and 20G) or a DSM bolt-on Garrett like Precision. I've ran a 16g (MHI EVO3) up to 8k rpm on an 8:5:1 CR motor that was 2.0L and it pulled solid until redline at exactly 20psi. It's a noticeable difference over a 14b and is a bit bigger than say a .48/.42 T3 (45 trim). According to the maps it can muster a few lbs/min more than the Thunderbird .63/.60 as well.

Just make sure it's a genuine 16g. Pay close attention if it says EVO anywhere in the title because knock off EVO3 16G's are rampant and suck a dick. Like the previous guy said, it has to have "TD05H" stamped on the compressor housing or it's a knock-off. Also look at the actuator arm. If it's adjustable it's not a real MHI turbo. Just buy from good feedback people haha. I'd say a Mitsu or a Garrett T3 are you cheapest and easiest options. Even a 14b outflows a small T3 though (like the .48/.42), so if you're on a major budget it's not a bad choice at all. Good luck nga.