North American Turbocoupe Organization



Stock Turbo
86 XR7 5spd Offline
Senior Member
#21
um well all turbos need either a WGA and internal wastegate, or an external wastegate

when you buy a turbo it usually includes the appropriate WGA

the one in the picture is plumbed directly to 'boost', and relies on a spring internal to the WGA to determine the opening boost level;
but, instead, you could plumb it to the factory system, or a MBC, or some other form of boost controller...

PS I have a T3 garret fs over in the Parts FS forum Wink
David T
T5 / ported E3 / .63 / 35# / K&N
2.5" exhaust w/ cherry bomb
30+ mpg! 8.2 0-60, [email protected] 1/4 (gTech)
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EveryDayBirdStuff Offline
Junior Member
#22
Now that I think about it there is an 85 TC in the local junk yard. Might try and see if it is still there Monday.
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86 XR7 5spd Offline
Senior Member
#23
if its a 5-spd , grab the turbo, it (should) be a .63 turbine housing,, will be stamped on the side ..
David T
T5 / ported E3 / .63 / 35# / K&N
2.5" exhaust w/ cherry bomb
30+ mpg! 8.2 0-60, [email protected] 1/4 (gTech)
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EveryDayBirdStuff Offline
Junior Member
#24
I found a Garrett TB03/T3 from a SABB remaned, for $400. would this one work?
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anasazi4st Offline
Senior Member
#25
(11-03-2019, 08:02 PM)EveryDayBirdStuff Wrote: I found a Garrett TB03/T3 from a SABB remaned, for $400. would this one work?

In my research, there are distinct differences in even the same model of turbocharger.

For example: some turbines (or compressor wheels) have a different amount of blades (the turbine is the thing that the exhaust spins; it’s connected by a steel shaft to an impeller, which is what “packs” air into the intake manifold and therefore into the cylinders). Obviously this is a factor in the turbo’s performance—more blades mean the turbo will likely spin faster than one with less. The engine’s systems—fuel, ignition and intake—depend on a certain interconnected formula that requires the proper amount of each. Installing a turbo that puts out more or less boost—blindly, without having an engineer’s knowledge to determine how to tweak that formula—is likely a recipe for improper performance or even disaster.

The turbine in my stock Warner IHI RHB5 turbo—and I would gather, all 1987 and 1988 stock models—have 9 blades. Even if the SAAB turbo did fit, unless you take it apart you can’t be sure what the internal configuration is.

I know that some newer Fiat cars also use the RHB5 turbo; not sure what others—except for turbo Cougars and Mustangs—also use that particular one.

SO—the short answer to your question is—probably not.

It sounds like you might be trying to be thrifty and save some $$. I’ve been there and can appreciate that. But words of advice: this is a very important component of your car. Anything less that the stock IHI RHB5 version—or the T3 that Jeff and others recommend—is likely going to result in compromised performance. You probably won’t be happy with the results, and in a worst case scenario will be back here in a few months after you’ve blown the turbo, looking for answers.

Spend the money for the correct part. You’ll be much happier in the long run.
Another proud dues-paying member.

1987 Turbo Coupe w/T5OD, 8.8 axle, grey smoke; most options. Got it in 1991 with 41K miles: 3 turbos, 2 heater cores, 1 T5OD full rebuild, 5 clutches, 1 head gasket, 2 Teves II ABS units, etc. later....
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EveryDayBirdStuff Offline
Junior Member
#26
I will look into a rebuild kit for the IHI RHB5, I dont wont to lose power due to the car already being the auto. Are there any reputable turbo rebuild kits out there?
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