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Underbody braces, turbos and more!

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PostPosted: Wed Oct 16, 2013 10:17 am 
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All,

My 200km car has developed a crack in the turbo housing. While I have it off to repair the crack, I'm wondering if I shouldn't just replace it. So two questions:

    If the stock factory unit is an IHI RHB32, can anyone confirm that the Daihatsu RHB32 sold by these guys (http://www.keicarshop.com/) will work in it's place? Are they the same company? And
    Is there another turbo I should be considering? I'm after more low-RPM driveability rather than max power at 7k...

Any thought are appreciated.

Joe


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PostPosted: Wed Oct 16, 2013 10:35 am 
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Looks like it's almost the same turbo, with some differences on the cold side. It appears to have the same exhaust flange, but it's hard to say since I haven't had one in my hand for a few years now. Without making a replacement manifold, you'll want to stick with the stock turbo (which was designed for "low-end" grunt anyway). I'm not sure you'd want to go much smaller.

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PostPosted: Wed Oct 16, 2013 11:02 am 
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Thanks for the reply!

Totally agree. Just can't find one.

Also, managed to (sort of) answer my own question: That site calling it Daihatsu is about the fact that it's the replacement for a turbo in a Daihatsu. It's still an IHI product.

So, next question: Where do I find a new turbo? I do have a fall-back plan -- which is to simply weld up the turbo I have -- but at this point, depending on price, I night just replace it and be done.


Joe


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PostPosted: Wed Oct 16, 2013 11:38 am 
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You could try looking on this site.

viewtopic.php?f=15&t=56881&p=426172#p426172

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PostPosted: Wed Oct 16, 2013 12:16 pm 
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Hi suprf1y!

Yeah, I saw that, but the issue here is that the housing is cracked, so reaming it out for larger bearings is likely a no-go.

Although the point is moot, $1500 for a bearing swap is also a no-go...

Joe


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PostPosted: Wed Oct 16, 2013 9:37 pm 
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i have some housings which one do you need ???

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it doesent have to be surrounded by water to be a island and dont forget it's a 3cyl Blow,Suck,Bang


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PostPosted: Wed Oct 16, 2013 9:53 pm 
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You'll pay that much for a new unit,
I'd consider the upgrade if yours is repairable.


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PostPosted: Thu Oct 17, 2013 8:09 am 
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mxmikie wrote:
i have some housings which one do you need ???


Well, I've got a '90 Sprint Turbo, which I believe means I have the RBH32 UZ5. Would anyone like to correct me on that?

Joe


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PostPosted: Thu Oct 17, 2013 9:30 am 
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That would be VZ5,
the MK1 Turbo Sprints OE turbo is the IHI RHB32 VZ5

I can't say which one they were using on your later
1990 Turbo Sprint. But if you check the tag on your
Turbo, you can confirm the model.

You'd also have much better luck if you posted
a picture of your unit and the damaged area.
My guess is small cracks around the wastegate
flap, this is typical of this style turbo.
Depending on the severity, the damage can sometimes
be repaired.


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PostPosted: Thu Oct 17, 2013 11:43 am 
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JamalSpelling wrote:
That would be VZ5,
the MK1 Turbo Sprints OE turbo is the IHI RHB32 VZ5.


Mine is still in my car and running, so pics are hard to come by. In fact, I have not seen the crack (I've heard it) but my mechanic says it's at the back of the unit against the block (if that helps identify the problem area).

As I understand it -- right you are! -- the turbo I need is, in fact, the VZ5:

Image

Thanks!

Joe


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PostPosted: Thu Oct 17, 2013 10:53 pm 
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i have a couple in parts and one complete one

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PostPosted: Sat Oct 19, 2013 11:37 am 
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I sent this as a PM, but it seems to be stuck in my outbox. So I'll post here too...

Excellent news!

So, if you'll pardon me playing "20 Questions" with you, I need to do a little due diligence...

Do you know how many miles are on the complete one? I'm also wondering if I can reuse the oil and water lines from my current turbo -- any thoughts?

Is it cracked or has it been repaired? Is it in good shape and spins freely without a ton of end play?

Are the "parts" turbos you mentioned also available?

I also need a price on the gasket kit, please.

I'm in Ottawa: Where are you?

Thanks VERY much!

Joe


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PostPosted: Sat Oct 19, 2013 3:17 pm 
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It will stay in your outbox until it's answered, then it will go to your sent box.

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PostPosted: Sat Oct 19, 2013 11:52 pm 
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JoeInOttawa wrote:
Thanks for the reply!

Totally agree. Just can't find one.



Joe



Why wouldn't you order one from that KEI web site in Australia that you mentioned? 350 bucks seems way cheaper than the 1500 bucks that IHI North America, or U.S. or whatever wants. I've ordered stuff for my MK1s from Australia and gotten it no problem. I'd be really interested to know if someone in Canada successfully orders and receives one of those new RHB32 turbos from that website and if it fits.


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PostPosted: Sun Oct 20, 2013 1:56 pm 
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coasterII wrote:
Why wouldn't you order one from that KEI web site in Australia that you mentioned?.


Because the cold side of the unit exits directly into the side of my block. I also notice that the centre inlet on the cold side has a tube, not a bolt flange.

I have asked a couple of people if the cold side could be rotated or replaced with parts from my old unit, but no response yet...

Now, if anyone here knows the answer, I'd appreciate it.


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PostPosted: Tue Oct 22, 2013 5:32 am 
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JoeInOttawa wrote:
coasterII wrote:

I have asked a couple of people if the cold side could be rotated or replaced with parts from my old unit, but no response yet...




What about sending an email or using Skype to telephone those Kei car shop guys in Australia who sell the brand new RHB32 and ask them if the four bolts holding the aluminum snail shaped housing on can be removed and then the aluminum snail shaped housing turned and bolted back on so the turbo outlet can be hooked up to the stock Mk1 or Mk2 Sprint/Forsa/Firefly/Geo/Metro hose that goes to the throttle body?

Some of those Australians know lots about cars so someone there might have the answer. There's car nuts in Australia who know a lot about making parts swaps fit. I once saw a picture of a Holden (I think that's what General Motors is called in Australia) that some Australian car nut had fitted an Allison 1,710 cubic inch V-12 engine out of a Curtis Tomahawk P40 WWII fighter airplane into.( American hydroplane racers use the same engines, like Miss Budweiser, Atlas Van Lines, etc. etc.) Fitting a Daihatsu Kei RHB32 into a Mk1 or Mk2 Forsa/Sprint/Firefly/Geo or Metro would be a no brainer for a guy like that.

If the price and shipping from Oz of that brand new Kei Car Shop RHB32 is even within a few hundred dollars of acquiring a rebuilt or used RHB32, and it can be made to fit, then that's definitely the way to go because all the stuff is brand new. I have personally spoken to a TeamSwifter out here in this Socialist Dung Heap known as British Columbia (no different from the rest of this country really) who had two RHB32s rebuilt at a cost of about 700 or 800 bucks each ( for a total of 1400 to 1600 bucks for the two) and one worked O.k. but the second one blew up in a short while. The turbo shaft was so worn that the rebuilder welded up the wear then machined the shaft back down but once the turbo was put to use some or all of the welds broke free and the shaft self destructed at 20,000 rpm. Trying to weld up a shaft and recreate an equivalent to the IHI built original in terms of metallurgy, hardness, heat treatment, tempering, strength and so on is, I'm sure , a pretty tricky undertaking, which is why, if it were me, I'd be do everything I could to find out how much that Kei Car Shop brand new Daihatsu RHB32 would cost for purchase and shipping and what would be involved in making it fit.
When I generate some spare cash that's exactly what I'm going to do once I get one of my turbos back on the road, which should be happening soon because on one of my turbo cars I think if I just swap in a known good distributor, coil, igniter and knock sensor then it'll run fine because I'm pretty sure the problem with it is one of those things. And its a really nice Suzuki Forsa turbo, too, with factory power mirrors and a factory in dash clock so I'm pretty pumped to get it back on the road.


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