Turbocharger turbine wheel clipping, the insde story!

Ever wondered what a clipped turbine wheel was? Why was it done? In this video I will go over the basics of this topic. Be sure to leave a comment if you have a question, I will be happy to answer them. Hope you all have a great day! -Reed

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[BioCosmic--Dust]

I don't think I heard the words "trailing edge" in the video. But that's what gets machined. The trailing edge of each turbine blade gets machined. Glad you pointed out that it's kind of a kludge compared to getting a wheel that's made right to begin with for whatever your application is.

[levischittlord]

It was a trick that was employed a lot back in the DSM modding days with the Mutt and Frankenstein turbochargers so you got a Garrett compressor in a Mitsubishi turbocharger that bolted right onto a ported exhaust manifold and ported O2 housing.

[FredAllenBurge]

Good video. Would love one going over that G-series turbine you showed there at the end👍

[protomotive]

Well done. Visually seeing the difference through the housing shows how much flow improvement 10deg can get you! Are you concerned about the tips degrading on the machined clip where it appears sharp?

[kylemilligan]

Had a "greddy" turbo kit on a h22 prelude years ago. Big compressor small turbine. It was "happy" around 260whp dynojet around 10psi boost. Against my suggestions, he had the small turbine wheel"clipped" and lost around 10 wheel hp everywhere

[JustinBone]

I have a hybrid turbo ready to go on my car. It has a clipped turbine wheel, and a large and lighter compressor wheel. What are the chances it will greatly impact lag/spool response?

The factory turbo typically starts spooling around 1.7k, while this turbo supposedly starts more around 2k. My 2.5-3k range is quite nice on the highway on stock turbo, but it dies off quick at 5k+. Wondering if I’m better off getting a hybrid with a fully redesigned turbine wheel to help prevent low end power loss or lag. There is also a Xona CHRA option with a ball bearing as well, which might help some too.

[Fktd]

Yes you lose response but gain Hp by removing old exhaust from the cylinder from lower back pressure. This means more fresh air the cylinder and higher hp at the same boost pressure.

[HeidiFegles]

Clipping is when you are putting a smaller turbo on a big engine and need more flow. Not needed on a 4 cylinder when you are trying to extrapolate as much power as possible. Clipping anythjng will ruin your power band.

[engjnr]

In smaller applications its not going to respond as well and wont sppol up to it's normal operating curve. Rather buy a slightly larger turbo more consistent with your applications. Just saying.

I've designed turbos. Ask me.