Trinydex, you are absolutely correct. I was going off memory, and must be getting senile, since when I looked at the charts again, I realized that my assertions had been incorrect. The effects were as follows:

Adding the AMS VSR intake is what resulted in the later spoolup.

Adding the ported head did not change spoolup, but resulted in less initital torque.

Both mods added topend power.

My apologies to all. I'll fix the earlier post...

l8r)

... hey looks like I got it right in my second post in this thread. I just brainfarted my first comment ...

 

The divider does a better job of directing pulse energy into the turbine, so the answer to your question is 'yes'.

 

ah this is very good info thanks for the clear up ludikraut

 

280 HKS's with the port, i haven't had any trouble, but I had a really good tune

 

Thanks for your post. Could you list all of your mods? Where did you get tuned? Any dyno numbers/spools@?rpm

It will be great if you could post more info.

Thanks again.

 

-XS Power TBE
-Tial 50mm BOV
-Full-Race Exhaust Manifold
-DEI Exhaust Wrap (for Downpipe)
-Walbro 255 Fuel Pump
-Buscher Intake
-Manley Rods
-Mahle Pistons
-Clevite Rod Bearings
-Clevite Thrust Bearings
-Clevite Main Bearings
-Eibach Pro Springs
-Garrett GT30 Turbine
-IMW Race Head
* 5 Angle Valve Job
* New Valve Stem Seals
* Undercut Valves
* New Valve Guides
* New Floors and Ceilings
* Gasket Match Porting
* EGR Delete
-Cometic 86mm Head Gasket
-ARP Head Studs
-Block Work
* Hot Tanked
* Compression Tested
* Overbore .040
* Professionaly Honed
-Aeromotive FPR
-Greddy IC Piping
-280 HKS Cams (Off the AMS Drag Evo)
-Tial 44mm Wastegate
-Greddy / Trust Intercooler
-Apexi Neo Fuel Controller
-Turbo XS Dual Stage Boost Controller
-Perrin Fuel Rail
-AEM Tru Time Cam Gears
-RC 880cc Injectors
-Crower Springs and Retainers
-ACT 2600 Clutch (6Puck Non Sprung)
-60 shot Direct Port Wet ZEX Nitrous Kit
-Turbo XS UTEC
Don't make fun, I know its not the best setup but it works

It wasn't dyno ran, they don't have a AWD Dyno so they did it on the street, but they have been tuning evolutions and STIs for 3 years and a friend of mine had really good luck with them, kind of expensive but she runs great now :-)

http://www.gomcracing.com/ Lenexa Ks

 

So... it seems that getting the race port job seems to give up a few hundred rpms on spool up, but with the bigger turbo and camshaft setup, the topend gain past ~3000 rpm is great is what I'm hearing. (I know I'm generalizing)

Does anyone have the bigger camshaft/race port setup with White Rabbit turbo, or 20G turbo setup? What could I expect with this setup?

Feel free to chime in. Thanks.

 

So long as the capacity and efficiency of the turbo is the limiting factor, that will likewise limit potential power improvements in rpm ranges where the turbo is near its limit.

 

you owuld expect the turbo to limit the power... just like it does now.

 

Lets keep it going! There's gotta be more people with ported head.
Post some numbers here please so we can get some idea.

 

Bump! I'll make this a May bump. I hope the next post not a June bump ...

 

Bump! Anyone else? Please post, and get the word out for this thread.

 

could you go with some wackjob combo like 280i/264e on a ported head and maintain good spoolup or would there be no point because of the 264 ehaust cam limiting flow anyways?

what about adding a stroker into the mix?