Ported VF11

BXSS · Post by **BXSS** » Fri Jan 19, 2007 5:32 pm

Has anyone tried porting the turbine inlet of the factory VF11 turbo? It seems undersized compared to the up-pipe outlet (1- 3/4" vs 2-1/8")?
I did this on the stock tdo5 on my Galant Vr4 & had very good results (from 2" to 2.5" inlet).
If yes was it worth the trouble?

farfrumwork · Post by **farfrumwork** » Fri Jan 19, 2007 7:42 pm

I have not with the vf11, but I WILL with the vf12 that is sitting in the garage before it goes in (I gotta get on that damnit!!)

I can't imagine that the vf11 is any different than any other turbo as far as port matching inlets goes. I've read through almost every DIY P&P thread on nabisco and the general consensus is that it is very worthwhile and will improve spool times and powa output.

BXSS · Post by **BXSS** » Fri Jan 19, 2007 8:56 pm

I think the Vf11 is very limited in terms of maximum output, but I think porting should have positive effects on both spool-up & backpressure/EGT.
For folks wanting to run low boost this should help to expand the powerband a bit.

waldo320 · Post by **waldo320** » Sat Jan 20, 2007 11:03 pm

I have heard that when porting the td04 it increase the effeciancy a lot ! I ported the intake on mine and it spools pretty fast but I dont really have a stock one to compare it to so who knows. I would still port it it will never hurt. Oh and have fun with that snap ring !!!

Carbix · Post by **Carbix** » Sun Jan 21, 2007 12:45 am

how much does something like that cost

BXSS · Post by **BXSS** » Sun Jan 21, 2007 3:18 am

The Vf11 does not use a snap-ring, but the td05's do.
I was gonna port my 16g before I installed it, but my motor died so I did'nt have a chance.
The Tdo5 14-b (ported & very fast spooling) I have on my Impreza has the snap ring your talking about but it comes off quickly with snap-ring pliers.
A turbo can be ported for the cost of a carbide bit (about $20 from grainger), it is not rocket science.
I think the biggest gain should be found in match-porting the turbine inlet to the up-pipe outlet.

lunes · Post by **lunes** » Sat Mar 24, 2007 4:28 am

"A turbo can be ported for the cost of a carbide bit (about $20 from grainger), it is not rocket science. "

you say this, but I am unsure how this is accomplished, could you explain it a bit for me, or anyone else who is curious? I have one more vf11 coming in a few days, and I would like to see if I could or should try it... it sounds like another worthy mod for my project legacy.

Radial GT1 · Post by **Radial GT1** » Sat Mar 24, 2007 7:04 am

Make a templete of the uppipe port and put it on the turbo and trace. Port inside the line , and make smooth. IE porting.

To go +1 get sand wheel as well and make it smooth. IE polishing.

lunes · Post by **lunes** » Sat Mar 24, 2007 11:11 am

Oh. my mistake. Ive done that before, just didn't call it anything special. didnt realize that was all "porting" was. ha ha ha.

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Ported VF11

Ported VF11