Look what FedEx brought me today!
click for full size
click for full size
The registration card indicates that the model number is "5862SP"
First 2 digits are the compressor wheel inducer diameter: 58mm
next 2 digits are the turbine wheel exducer diameter: 62mm
The "SP" just indicates the compressor housing type: "S" style (4" inlet, 2.5" outlet), "P" for ported (anti-surge porting)
This has the T4 tangential .58 A/R turbine housing.
Here's the product page for the 5862 turbo: http://www.precisionturbo.net/produc...2-CEA-reg-/233
Both the compressor and turbine wheels are machined from solid pieces of metal. The compressor wheel is machined from a block of forged aluminum. As far as I know, the Garrett turbo has standard cast compressor and turbine wheels. Here's Precision's marketing about their machined wheels:
Compressor wheel: http://www.precisionturbo.net/tech/C...ssor-Wheels/37
Turbine wheel: http://www.precisionturbo.net/tech/C...bine-Wheels/41
Here's a closeup of my compressor wheel. The machining marks are visible:
click for full size
I can't see any machining marks on the turbine wheel, so maybe the turbine wheels are put through some smoothing/finishing process, or maybe the machining of the compressor wheels is intentionally more coarse for some aerodynamics reason? I did find some pics of Precision's old vs new turbine wheels and confirmed that mine definitely appears to be the newer "CEA" turbine wheel.
This should probably be a new thread. Seems quite unrelated to the new Precision turbo. But, no, I don't have an annoying squealing noise.
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