Are there any benefits of clipping the stock turbo? Disadvantages?
Anyone with personal experience who can share would be great!

 

No one has any experience with this?

 

?????????????/never heard of that..

 

https://www.evolutionm.net/forums/ev...ing-turbo.html

 

You really wont see benefits until you move into a larger compressor, like a Red or Black from FP.

 

Thanks but sounds stupid just buy A bigger turbo..

 

ok since nobody wants to give this guy an answer from the closed minded evo world... clipping a turbo will give you more turbo lag, but increase your top end slightly by allowing more exhaust gas to flow through the turbo. I'm sure you would see some advantage but probably not worth doing. depends how much it would cost you

 

Thank you for your input! I appreciate it. Not a fan of lag

 

If the turbine wheel were to be clipped then it would need to be rebalanced separately since its weight and radius would bave been changed by clipping. Also, once you put it back together the complete rotating assembly would need to be rebalanced as a unit.

 

I don't think it would be worth the time, expense, and trouble of clipping a stock turbo. I think it would just add more lag with negligible gains.

 

Clipping on a turbine wheel never designed for it tends to drop turbine efficiency and give only small gains on top end flow.

Some of the Garrett GT turbine wheels are "clipped" from the factory but it has been designed that way and does not loose efficiency.

In the end, it's more lag and minimal top end gains, particularly for a stock turbo where the compressor is the limiting factor anyway. The stock turbo is a little biased to exhaust flow, from what FP has reported and is why the FP white is able to make a little more HP. It offers an increase in compressor flow to eek out the last little bit the stock turbine can flow.

 

This was a popular mod for 3sgte ct26 turbos about 9 years ago. When it first was available it was the thing to do, it actually was later found to mostly just increase lag with real small benefit in hp.

 

I´ll be honest with you and say that the only possible scenario under which I would ever consider clipping a turbine´s blades would be to stuff a larger than stock turbine wheel into a stock sized turbine housing. Under certain, specific, circumstances this configuration might, at least hypothetically, be desirable.

Possibly, due to a larger wheel´s increased major and minor diameters, there could be a significant decrease in exhaust backpressure, and a resultant improvement in transient response eventhough there would be an increase in rotational mass and a slight reduction in initial rate of spool. The larger diameter clipped wheel would result in reduced exhaust back pressure at the cost of a slight increase in inertia. However, clipping a stock sized turbine wheel is mostly a waste of time and money IMO.

Instead of clipping the stock turbine wheel, you might as well just port the stock turbine housing(it would be easier and less complicated requiring no VSR rebalance). As others in this thread have stated, there is always a tradeoff. Either way, you will see slight gains in the topend at the expense of some midrange power and spoolup.

 

i dont know who is but great question.. never even thought of doing this