What gains can you get from porting and clipping your stock evo9 turbo? I've searched porting and all i've found was info on ported intake mani's.

If you had the supporting mods like tbe, dp, intake, icpiping, mbc, fp, and reflash what could you be pushing to the ground?

Thx for any info or suggestions

 

None and why do you care? You don't even own an Evo.

Its stock turbo, not "stocked turbo".

 

Hard to say exactly what you'd be putting to the ground. I haven't heard of anyone porting or clipping their stock turbo. Basically it will spool up later and flow more. I wouldn't expect huge gains from it though. I think it's worth a shot. I'd like to see before and after dyno runs on that.

 

I like how some members in this community always have a negative response towards any new threads. I'm actually about to purchase an evo9 and was just asking for some info. I hope this isnt the type of responses i'm expecting to recieve in the future.

I've previously owned a 2g gsx and with dsm's many ppl port and sometimes clip there small 16g. The porting allows for more flow and the clipping allows for better top end and mid range power. If I'm correct.

Will this result in possible power advatages with the supporting mods, compared to just the untouched stock turbo and supporting mods?

There are some members here with ported stock turbo's. Responses from them would be very helpful

 

I never would have expected a response like that from a vendor. Damn. Not very professional if you ask me.

 

There are many threads available for the searching. Much dyno testing by Buschur on various combinations of wastegates, porting, clipping, etc.

There is one viable option for an EVO IX (as you stated being interested in) which is the Evogreen larger turbine wheel with 5 bladed 20g type compressor wheel.

For 2003-2004, the 10.5cm2 hotside upgrade is what the 2005-2006 comes with from the factory.

The 2006 IX has a larger compressor housing and is an upgrade from the 2003-2005 turbo.

As already stated, the next step is the Evogreen turbo by www.forcedperformance.net. Any other "modifications" to the factory IX turbo and you are wasting your time/destroying a perfectly good turbocharger.

 

There isn't any measurable power to be gained from porting the compressor housing. Some people will polish the outside of the compressor housing for visual impact though. On the exhaust side, you can gasket match the turbine housing inlet to the manifold gasket, but there really isn't that much overhang(maybe 3/32 in.) as delivered from the factory. If you have long- shanked carbide bits you can remove some material deeper down into the scroll. However, there is no dyno proof that you'll actually gain any power for your efforts.

As far as clipping the turbine wheel, I think that Buschur tried this on the 16G turbos and got a tad more topend power due to decreased backpressure, but I think that it was minimal. Clipping the turbine wheel involves some complicated and expensive machining steps.

First, the turbo has to be disassembled. Then, I think the turbine wheel has to be removed from the shaft. Centered in a chuck or jig and indexed. Then the proper angle setup as there are numerous possible angles.

Once the wheel has been machined then it needs to be balanced off the shaft. Then the turbine wheel needs to be remounted onto the shaft and the entire rotating assembly needs to be balanced as a unit. To do the balancing correctly, the shop needs a very special, ultra-expensive balancing machine of which there are only a few in the U.S.This balancing machine is called a VSR(I think?) Balancer and it is needed because turbo rotating assemblies spin at such ultra high RPM's, up near 50,000 RPM.

So, you can see that a lot of machine shop hours go into R&R, assembly and disassembly, porting and clipping and finally balancing to achieve at best a minimal power gain. So why would you want to do this, when you can just send your existing IX turbo into Forced Performance and have them reconfigure it into an Evogreen turbo for around $800, resulting in a proven 20-30 WHP gain over your stock IX turbo.

Scott from TTP pointed this out to you. He ought to know how to extract every last bit of power from the stock 16G turbo, as he has trapped near 130 MPH with it. Take his advice and if you are considering porting and clipping your stock IX turbo, just have it reconfigured into a BR 20G-LT/ Evogreen instead. It'll save you time and money. If you don't wanna spend the money then leave the stock IX turbo as is. It is a great unit as delivered from the factory.

If you still seek more info then an archive search will turn up relevant material, especially the earlier comparative threads dealing with the introduction of the EvoGreen, aka the BR 20G-LT.