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Old 05-16-2004, 09:57 PM   #1
Lordhowe
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Default Ported and polished stock turbo

What are the main advantages of porting and polishing a stock 03 wrx turbo? What type of gain can i expect to get out of it? A few hundrad rpm faster spool or a few extra hp?

thx ahead of times.
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Old 05-16-2004, 10:11 PM   #2
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500 RPM (or so) quicker spool.
0 HP gain.
15ish torque gain down low.
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Old 05-16-2004, 10:35 PM   #3
kitbar
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sounds lik ea good mod if you can do it yourself but if not, the cost is about 1/2 the way to a new vf22!
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Old 05-16-2004, 10:36 PM   #4
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hey thanks master of FAQ. I was wondering too.

are there any distinct advantages of ball-bearing turboes over equivalent non-bb ones?

EDIT: OH WAIT. I just read the faq... nevermind.
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Old 05-17-2004, 12:22 AM   #5
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I used a deadbolt P&P TD04 with a 'light clip' for almost a year and it was a great step up for the stock turbo.
The car felt like it had a small N/A V8 under the hood
If someone HAD to stay with the stock turbo, for whatever reason, this is what I'd do/have done....no doubt.
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Old 05-17-2004, 03:52 AM   #6
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Quote:
Originally posted by Uncle Scotty
I used a deadbolt P&P TD04 with a 'light clip' for almost a year and it was a great step up for the stock turbo.
The car felt like it had a small N/A V8 under the hood
If someone HAD to stay with the stock turbo, for whatever reason, this is what I'd do/have done....no doubt.
As a person running cobb stage 2 would I need custom ecu tuning to take advantage of this P&P of the stock TD04?
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Old 05-17-2004, 06:27 AM   #7
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Quote:
Originally posted by Happy_Days
As a person running cobb stage 2 would I need custom ecu tuning to take advantage of this P&P of the stock TD04?
No. I asked Cobb myself about this and it will work fine.
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Old 05-17-2004, 07:35 AM   #8
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Quote:
Originally posted by Unabomber
No. I asked Cobb myself about this and it will work fine.
I know someone that is having a hard time with a P&P VF34. I think he is kinda happy with it now. But it took ~1month of back and forth with logs and maps to get it right. This was with the AP.

TMS
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Old 05-17-2004, 08:16 AM   #9
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Quote:
Originally posted by TheMadScientist
I know someone that is having a hard time with a P&P VF34. I think he is kinda happy with it now. But it took ~1month of back and forth with logs and maps to get it right. This was with the AP.

TMS
I think way too many people "poo-poo" the P&P as a nothing mod on a turbo....different turbo's respond differently...some benifite a LOT from a P&P...some less so... in actuality it really can and does change the characteristics of the turbo quite a bit.
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Old 05-17-2004, 04:45 PM   #10
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what are the risks of messing up if i were to port and polish it myself, from my understand, all p&p is you put the gasket on the flange and trim the metal so it is lined up with the gasket.
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Old 05-17-2004, 06:43 PM   #11
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Quote:
Originally posted by Lordhowe
what are the risks of messing up if i were to port and polish it myself, from my understand, all p&p is you put the gasket on the flange and trim the metal so it is lined up with the gasket.
You could cut too far and put a hole or a weak spot in the turbo's casing. I guess if you cut out the wrong shape you might cause the exhaust to flow worse than stock and hurt performance.


I did a mild port and polish on my stock turbo. Mostly all I did was take about 1mm of material off all the way around and the smoothed out all the rough spots. I also smoothed the WG port. I would have taken more off but I only had a dremel with the regular grinding stones. If I had a carbide bit I might have take more off.

I noticed some small gains in spoolup after doing this. Also for some reason the EGTs seem to be alittle lower. I dont know if the p&p was the cause of that though.
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Old 05-17-2004, 07:07 PM   #12
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Quote:
Originally posted by Lordhowe
what are the risks of messing up if i were to port and polish it myself, from my understand, all p&p is you put the gasket on the flange and trim the metal so it is lined up with the gasket.
That is NOT a P&P....by any means...that is more of a 'port matching'....see deadbolts website and you can see some of what he does to the exhaust housing. It is an extensive milling of the turbine outlet and the wastegate port as well as some machining of the inlet.
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Old 05-17-2004, 09:37 PM   #13
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Link to Deadbolt site please
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Old 05-17-2004, 09:46 PM   #14
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Quote:
Originally posted by cky211
Link to Deadbolt site please
You have got to be kidding??!!!??

You have been on this board for HOW LONG and you can't find it in under 20 seconds??!!??

UNBELIEVABLE.
FULL STOP.

















http://deadboltspeed.com/indexmain.htm
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Old 05-17-2004, 10:01 PM   #15
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Thanks for your help Uncle Scotty
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Old 05-17-2004, 10:09 PM   #16
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N/P
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Old 05-17-2004, 10:20 PM   #17
HerculesPeanut
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Quote:
Originally posted by kitbar
sounds lik ea good mod if you can do it yourself but if not, the cost is about 1/2 the way to a new vf22!
You can get a VF22 for $400? What about injectors and fuel pump?

I can ship my turbo to deadbolt and get a P&P for $200

I am not trying to be obnoxious, it's just that everyone seems to overstate the cost of the P&P. It could cost more but doesn't have to.
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Old 05-18-2004, 01:18 AM   #18
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Its because $200 is alot to spend for the gains that you get. For another $200 you can get a reflash that will have produce much more power than a ported stock turbo will.

Then again if you have a reflash and other mods and you dont want to fully upgrade the turbo then this is probably your next step.
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