ported turbo

[DSMRoadrash]

Forced Performance Turbochargers: Mitsubishi EVO III Big 16g Turbo

what does

ported mean?

and Turbine Wheel clipping mean

will a Mitsubishi EVO III Big 16g Turbo fit a DSM Eclipse 99 GSX

 

[Captainredeyez]

Yea it will fit, you will just need the 2G install kit.

Same question here on the clipping.

 

[DSMRoadrash]

Yea it will fit, you will just need the 2G install kit.

Same question here on the clipping.

anyone anyone clipping whats that mean :/

 

[Captainredeyez]

Clipping is the technique of cutting away some of the material on the fins of the impeller wheel of the turbocharger. In other words, to 'clip' a turbo is to make the fins in the exhaust path smaller. The cut is usually done at an angle of between 10 and 20 degrees - the bigger the angle, the more material is removed from the fins.

This may seem like a dumb thing to do, since smaller fins mean that the exhaust gases will impart less force to the turbine wheel and consequently increase turbo lag. This is true, but the benefit of clipping is found in the high RPM range of the motor. At higher RPMs, the turbo may have already surpassed the required user-set boost levels and is not contributing to engine power.

Since the impeller wheel in the exhaust stream partially blocks the exhaust gas flow (by design), it can act as a significant restriction at high RPMs, when the exhaust flow rate is highest. Clipping the turbo reduces this restriction and allows more air to flow past the turbo wheel at high RPMs, thereby improving airflow through the engine and increasing top-end response.


Found it.

 

[viperlp01]

Porting the stock evo 3 16g means making the area inside the turbo bigger to promote air flow which in turn makes faster more effiecent spool times and it also lowers the chances of boost creep.

He got to it before i could finish good post

 

[thilaksharma]

The turbine wheel is the only thing standing in the way of air exiting the engine and the exhaust system. If tolerances are too tight for the application, air cannot escape efficiently. This can cause two distinct problems: 1. Boost creep - when the air cannot escape quickly enough, it will attempt to push through the turbine at a rate too high for the turbo to allow. This will cause boost levels to rise, in some cases to dangerous levels. 2. Decreased power - If the air cannot escape quickly enough, many times the car will NOT perform to its fullest potential

When we clip a turbine wheel we use very precise tooling to make sure that we can offer the most precise removal of material possible. We also them rebalance the turbine wheel on our state-of-the-art Heins TC3 balancer:

some pics ( left is clipped)

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[Captainredeyez]

So when would a clipped turbo be a good idea? I mean if I get a new turbo should I do it as soon as I get it or.....

 

[Captainredeyez]

Found the ported one too.


Porting is the technique of improving airflow by removing additional material away from a component. Typical components are intake and exhaust manifolds, turbos, wastegates and oxygen sensor housings, all of which can be opened up to achieve better airflow. Porting the O2 sensor housing and/or wastegate is an often recommended cure for boost creep. This uncontrollable rise in intake pressure is often caused by the turbo pushing more air than can be possibly be dumped out of the wastegate and downpipe, despite the wastegate being completely open.

Porting is considered something of an art, with most established vendors claiming that a poor porting job will actually reduce airflow. Some porting services also come with polishing, which some consider a waste owing to the contaminants present in exhaust air.

 

[JusMX141]

Clipping has been known to ruin a turbo's ability to build boost effectively, depending on the size of the turbine wheel. It's a tradeoff...you lose spool time to gain flow on top end at extreme boost levels.

Generally speaking, clipping is only done when a turbo is unbalanced in terms of flow....the compressor wheel can physically outflow the turbine, and the turbine becomes a restriction. Clipping helps to narrow the gap.

 

[spydermanX98X]

no offense but both these questions can be answered easily by searching

 

[Captainredeyez]

Well it's to late we answered the questions, so don't go putting your two sense in here. S*it I even answered my own question.