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Old 06-12-2012, 09:48 AM   #1
shamrock 05
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Default PnP a td04, but....?

I am considering doing this for a quicker spool for my DD (need to find a 02-05 td04 with no shaft play first) lol but I was looking at GrimmSpeeds site and thinking about having them do the work. However I have searched and no one has said anything about this...

Some locals told me that if I am going to do the turbo, I should have the up pipe done as well. So the 2 sides are a match. Now GS does not list this on their site nor have any other pnp threads mentioned this? Now what makes me question this is if the turbo and up pipe are both pnp to so-called "match", wont putting the up pipe to turbo gasket in there screw it all up anyway? I am using a STI up pipe (bang for the buck) but is this something I should consider as well?

Shed some light on this please, thanks fellas.
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Old 06-12-2012, 10:22 AM   #2
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Grimmspeed carries everything you need for this, including gaskets. CALL THEM! Also some heat wrap and turbo blanket will help you out also, good luck!
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Old 06-12-2012, 10:22 AM   #3
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Yes, you should do them all. But then again, why stop there? Your still going to have restrictions in your tgv's, intake manifold, headers, etc. There are always going to be restrictions.

Honestly, I'm not sure pnp'ing just the turbo and dp is going to be worth the money. That's my personal opinion. When I had mine done, I bought Grimmspeeds: tgv deletes, intake mani, headers with high flow X pipe, ewg, up, phenolic spacers, and I think that's it. I certainly noticed a huge difference in feel with all that done. It flowed crazy good, spool was slightly quicker and I could actually let out the clutch and the car would go, no gas needed. I even climbed some hills that way with friends in the car just to show how well it flowed.

So, basically, the pnp work truly helps everything flow better. Will there be much of a difference with just the turbo pnp'd? I don't know. You certainly could call them and ask if port matching the turbo to the dp and up would make a noticeable difference.
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Old 06-12-2012, 10:37 AM   #4
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Quote:
Originally Posted by hudsonvalleybugeye View Post
Grimmspeed carries everything you need for this, including gaskets. CALL THEM! Also some heat wrap and turbo blanket will help you out also, good luck!
Quote:
Originally Posted by rexblake View Post
Yes, you should do them all. But then again, why stop there? Your still going to have restrictions in your tgv's, intake manifold, headers, etc. There are always going to be restrictions.

Honestly, I'm not sure pnp'ing just the turbo and dp is going to be worth the money. That's my personal opinion. When I had mine done, I bought Grimmspeeds: tgv deletes, intake mani, headers with high flow X pipe, ewg, up, phenolic spacers, and I think that's it. I certainly noticed a huge difference in feel with all that done. It flowed crazy good, spool was slightly quicker and I could actually let out the clutch and the car would go, no gas needed. I even climbed some hills that way with friends in the car just to show how well it flowed.

So, basically, the pnp work truly helps everything flow better. Will there be much of a difference with just the turbo pnp'd? I don't know. You certainly could call them and ask if port matching the turbo to the dp and up would make a noticeable difference.
Guys, Im not referring to pnp the down pipe, just the turbo and the UP pipe? But I am thinking that the gasket would cancel out where the two meet?
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Old 06-12-2012, 10:59 AM   #5
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Quote:
Originally Posted by shamrock 05

Guys, Im not referring to pnp the down pipe, just the turbo and the UP pipe? But I am thinking that the gasket would cancel out where the two meet?
It will not if you get the correct parts, again...CALL GRIMSPEED. you will be done.
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Old 06-12-2012, 11:07 AM   #6
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the factory gasket is much bigger than the up-pipe and turbo. most people just port match to the factory gasket.
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Old 06-12-2012, 11:10 AM   #7
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Dont do it! The amount of time and money spent on this upgrade will not be worth it. You are much better off finding a used sti turbo for about the same price, if you are after more power. much better gains, same amount of labor, roughly same cost, no brainer.

the td04 already spools plenty fast. I doubt you will notice much an increase in spool, if any at all.

but, if you must do it, then call grimmspeed. /thread
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Old 06-12-2012, 11:38 AM   #8
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It is very noticeable after being tuned at 19-20psi. Especially in town and at and below legal highway speeds. Its stupid fun having instant boost and response. Its not for everyone having everything happen on the left side of the gages.


Ive had several iterations of pnp td04 for a half dozen years.
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Old 06-12-2012, 12:32 PM   #9
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Originally Posted by 02redwagone View Post
It is very noticeable after being tuned at 19-20psi. Especially in town and at and below legal highway speeds. Its stupid fun having instant boost and response. Its not for everyone having everything happen on the left side of the gages.


Ive had several iterations of pnp td04 for a half dozen years.
Thats what I was refering to. And as a heads up I called and spoke to GS, he flat out told me that it is NOT worth it to pnp the up pipe. Thay have done it before and seen little to no gain at all. They port the turbo to the gasket.

I know the vf39 is the way to go for more power, but that is not what I am looking for. Plus you will need the turbo, injectors, fuel pump and a larger tmic, were talkin prob close to $750-1000 pending on quality of parts.

I am looking for a quicker spool for driving around town, that is why I wanted to get the td04 pnp
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Old 06-12-2012, 01:18 PM   #10
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Are you running a stage 2 setup. Either way, wrapping and turbo blanket can help substantially. So can an aftermarket ebcs.
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Old 06-12-2012, 10:50 PM   #11
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I just did pnp headers and xpipe from GS and love it. I also wanted more low and mid on the 2.0. Next will pnp turbo and tgv phenolic intake. But I will enjoy for now and give GS my money later in the year.
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Old 06-13-2012, 12:49 AM   #12
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if it were me.....id do all the intake breathing mods.....get the stock manifolds swaintech coated....run a coated cross pipe and up pipe......do a turbo blanket.....wrap the dp

and get a 16g....pump and 750's and learn how to tune

i had 4 or 5 turbos on my 2.0 and the P&P td04 was fun but with just an intake and inlet and catless....it maxed out the stock injectors at ~17psi when the temperature went below ~60*

not changing out the stock 2.0 injectors severly limits what you will get out of the td04

i ran mine at 21-22psi and it was a blast but the 16g was better
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Old 06-13-2012, 06:49 AM   #13
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I've got a good td04 for sale. Put the gm bcs on there and wrap the turbo that's what I did and it has instant boost response.
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Old 06-13-2012, 07:24 AM   #14
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If your still using the stock BCS and an OTS maps of some sorts you are not going to get much out of this. A good tune with a 3-port BCS will do for for spool than porting the turbo. Also,like has been said,at a minimum I would do ported/polished exhaust manifolds as well.
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Old 06-13-2012, 09:29 AM   #15
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i've had a very well ported spare td04 exhaust housing sitting in my garage collecting dust for the past 8 years.

match that up with a pulled good chra and compressor housing and you're good to go.

just make an offer!
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Old 06-13-2012, 12:32 PM   #16
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Quote:
Originally Posted by Uncle Scotty View Post
if it were me.....id do all the intake breathing mods.....get the stock manifolds swaintech coated....run a coated cross pipe and up pipe......do a turbo blanket.....wrap the dp

and get a 16g....pump and 750's and learn how to tune

i had 4 or 5 turbos on my 2.0 and the P&P td04 was fun but with just an intake and inlet and catless....it maxed out the stock injectors at ~17psi when the temperature went below ~60*

not changing out the stock 2.0 injectors severly limits what you will get out of the td04

i ran mine at 21-22psi and it was a blast but the 16g was better

Current mods.....
HKS flat flange Dp
Vibrant StreetPower cbe
GrimmSpeed 3 port
Gimmick turbo inlet (the good one with the spring added so it wont crush)
STI Up pipe

The reason I went with the hks flat flange was A. I got it for free and B. I spoke to a bunch of people who have been around these cars for awhile and they said as long as I wasnt going past stg 2 or doing a turbo upgrade (16g ets) that Dp would be fine.


But for a PnP td04 you really think I would need new injectors? Then like what, the blues that come off the 06+ wrx? It seems strange that pnp the td04 would "max" out the stock 2.0 injectors. Its not pushing much more power, just a faster spool. And I believe the injector duty cycle has to do with your tuner. Fill me in if I said something wrong......

Last edited by shamrock 05; 06-13-2012 at 01:28 PM.
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Old 06-13-2012, 12:41 PM   #17
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it sounds like you are dead set on what you want to do. I still think, while a turbo upgrade is not the path you are looking for, there are still much better/easier/more cost effective mods to increase spool than PNP a turbo.

Sure pnp a td04 will help, but its not the restriction in the system i would be worried about. smooth out your intake and exhaust tracts first. once you have done all that then sure port away. just trying to be helpful.

dont know your current mods but catless exhaust + smooth intake (no accordian) + turbo inlet is going to go a long way

EDIT looks like youve done most of what ive said... uppipe is going to help a lot. intake and exhaust manifolds will help a lot as well, but thats equally as much $ and effort as turbo

and if your gonna go all out with everything mentioned, you probably will max your pump and injectors before you max the td04. i would consider upgrading them regardless, but thats just me

**EDIT #2***

i would strongly recommend an EWG if you are going to replace the uppipe anyway. it is astronimical how much this helps with smaller turbos. i am sure the effect is not as great on a 2.0 as a 2.5 but i feel it would still be very beneficial for spool and "engine breathing" at higher rpms as these tiny turbos choke subarus. heck your iwg is already blocked off as is, i would strongly be looking at this above all else if your gonna push it further

Last edited by 07VTRex; 06-13-2012 at 12:47 PM.
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Old 06-13-2012, 12:59 PM   #18
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i hope for a day when the nonsense about "EWGs helping spool" will cease to circulate.
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Old 06-13-2012, 01:31 PM   #19
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i hope for a day when the nonsense about "EWGs helping spool" will cease to circulate.
I never thought the day would come where I would hear that pnp a td04 would max out my injectors and fuel pump. Its not like I am upgrading to a 16g, I just planned on smoothing out "the little guy so he is faster'
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Old 06-13-2012, 02:37 PM   #20
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Quote:
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I never thought the day would come where I would hear that pnp a td04 would max out my injectors and fuel pump. Its not like I am upgrading to a 16g, I just planned on smoothing out "the little guy so he is faster'
You need to learn to search then. A stage 2 WRX can easilly max out the injectors and the fuel pump,especially in colder climates. It all depends on the tune and how much boost you are running.
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Old 06-13-2012, 04:20 PM   #21
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Quote:
Originally Posted by shamrock 05 View Post
Current mods.....
HKS flat flange Dp
Vibrant StreetPower cbe
GrimmSpeed 3 port
Gimmick turbo inlet (the good one with the spring added so it wont crush)
STI Up pipe

The reason I went with the hks flat flange was A. I got it for free and B. I spoke to a bunch of people who have been around these cars for awhile and they said as long as I wasnt going past stg 2 or doing a turbo upgrade (16g ets) that Dp would be fine.


But for a PnP td04 you really think I would need new injectors? Then like what, the blues that come off the 06+ wrx? It seems strange that pnp the td04 would "max" out the stock 2.0 injectors. Its not pushing much more power, just a faster spool. And I believe the injector duty cycle has to do with your tuner. Fill me in if I said something wrong......

get rid of that stupid dp

and pull your head out...all you REALLY need is a tune from somebody that isnt an idiot
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Old 06-14-2012, 09:21 AM   #22
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If you want a good cheap pnp'd td04 comp house I was going to rebuild mine with a 19t wheel but went with the vf34 so it sitting in my closet..ill let it go cheap just pm me
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Old 06-14-2012, 09:46 AM   #23
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Sent u a pm^^^^, but if I just threw that on (pnp cold side) wouldnt that be just doing "half" the job?
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Old 06-14-2012, 10:07 AM   #24
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not if you match it up with my hotside.
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Old 06-14-2012, 11:00 AM   #25
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If money is tight you will see a better gain spending that money on the TGV deletes and port matching the Intake Manifold. If money is no problem, then I wouldn't spend it on modding the puny td04. As others have said, either get a VF39 or 43 or a 16g instead.
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