Compressor map for a T04B-25?
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Car: 88 BMW 535i
Engine: 3.5L M30
Transmission: 4HP22E
Compressor map for a T04B-25?
i looked on google and couldnt find one. I was hoping that one of you would have it, and if so can you please post it here?
Thanks.
Thanks.
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Car: 88 BMW 535i
Engine: 3.5L M30
Transmission: 4HP22E
Originally posted by 89ProchargedROC
are you talking about a T-25 turbo?
there is no such thing as a T4 based 25 turbo i am aware of
are you talking about a T-25 turbo?
there is no such thing as a T4 based 25 turbo i am aware of
.60 Compressor A/R and 1.15 A/R Exaust Housing.
Oil cooled only, no water, dunno if its ball bearing or not.
The comprssor housing is an AiReasearch. The Exaust housing is a Garrett.
The ID Plate on the bearing assembly says ME1618 and T04B25.
pics:
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The only way to figure out what kind of turbo you have is to take off the compressor cover and the exhaust housing and measure the wheels. Then i can look up the the measurements in my book and try to match them to what wheels they are.
You have to measure the inducer and the exducer of each wheel. Measuring the "inducer" means measuring the diameter of each wheel at is very shortestest point. What i mean by shortest is that if you take off the compressor cover you will see that the wheel fans out like a pyramid. Its shorter at the top and then towards the bottom it gets wider. You need to measure the shortest possible diameter to get the "inducer." To get the "exducer this is just the major diameter of the wheel. The part that sits on the backingplate. this is the easiest part to measure.
you are going to have to do the same for the turbine wheel but it is kinda hard to measure. From the looks of it, it might be an old style P-trim or an O-trim wheel. You are going to have to measure.
MAKE SURE you use dial calipers and measure quite a few times and try to get the right measurement. It might take a few tries to figure out where and how to measure but once you get it, it's easy
You have to measure the inducer and the exducer of each wheel. Measuring the "inducer" means measuring the diameter of each wheel at is very shortestest point. What i mean by shortest is that if you take off the compressor cover you will see that the wheel fans out like a pyramid. Its shorter at the top and then towards the bottom it gets wider. You need to measure the shortest possible diameter to get the "inducer." To get the "exducer this is just the major diameter of the wheel. The part that sits on the backingplate. this is the easiest part to measure.
you are going to have to do the same for the turbine wheel but it is kinda hard to measure. From the looks of it, it might be an old style P-trim or an O-trim wheel. You are going to have to measure.
MAKE SURE you use dial calipers and measure quite a few times and try to get the right measurement. It might take a few tries to figure out where and how to measure but once you get it, it's easy
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