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Old 02-01-2013, 11:34 AM   #151
CalvinT
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The stock injectors for the WRX have enough headroom to handle a PnP on the stock turbo. IMHO not sure it makes much sense as it wouldn't buy you that much. You could get more replacing the catted up-pipe. You can keep the stock injectors with an aftermarket up-pipe but some say you should retune, others say you don't need to.
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Old 02-01-2013, 02:13 PM   #152
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Quote:
Originally Posted by CalvinT View Post
The stock injectors for the WRX have enough headroom to handle a PnP on the stock turbo. IMHO not sure it makes much sense as it wouldn't buy you that much. You could get more replacing the catted up-pipe. You can keep the stock injectors with an aftermarket up-pipe but some say you should retune, others say you don't need to.

You aren't listening.

I said the injectors max out before the turbo. What that means is that the turbo can flow about 5-10 more hp than the injectors. That's PEAK flow capability. If you still have the stock up pipe or exhaust, you won't get peak flow capacity of the turbo. So porting it provides no gains as the limit isn't the turbo, it's the items flowing air in and out of the turbo and engine.
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Old 02-02-2013, 01:05 AM   #153
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Seems to me that would only be a factor if someone does a tune to increase boost over stock.
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Old 02-02-2013, 01:59 PM   #154
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dude WTF are you talking about?
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Old 02-02-2013, 04:14 PM   #155
ANR62NV
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Quote:
Originally Posted by Maxwell Power View Post
dude WTF are you talking about?
You don't need a retune for a port n polish on your turbo
So he's saying it would only be a factor if you
re tune ..... But even headers , up pipe And port n polish isn't enough to max out your stock injectors or turbo .....
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Old 02-02-2013, 05:14 PM   #156
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thanks I was getting real confused as to what "factor" he was talking about.

As a tuner, I cannot tell you how many times I've seen customers with PnP turbos, factory headers etc make LESS power than guys without it.

Do not port the factory header.

If you aren't getting a tune, why would you change anything? A lot of mods that are done to increase flow can actually result in lower power output as the ecu now sees more air. In the case of my tunes, I add safety features to protect against extra air that would be seen in the case of boost spikes or boost creep. Increasing airflow on some cars after they are tuned will result in lower power output until they are retuned.

PnP the factory turbo? Pointless IMHO.
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Old 03-29-2013, 02:29 AM   #157
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I just bought a PnP TD04 for my 02 wrx 2.0... I have a 3 inch hks exhaust and will be getting uppipe and downpipe.
Also have atage 3 clutch and organic flywheel.

Dud i make a mistake in buying the ported turbo??
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Old 03-29-2013, 07:30 AM   #158
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Your first mistake was that clutch as it is WAY too aggressive for that turbo....try reading my other FAQs first next time. You did not make a mistake with that turbo as they are WAY fun on a 2.0L....I have one for many years and still fondly recall it.
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Old 03-29-2013, 08:02 AM   #159
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Quote:
Originally Posted by thehanz123 View Post
I just bought a PnP TD04 for my 02 wrx 2.0... I have a 3 inch hks exhaust and will be getting uppipe and downpipe.
Also have atage 3 clutch and organic flywheel.

Dud i make a mistake in buying the ported turbo??
I would try to refrain from using generic terms like stage 3 clutch. Its more helpful to know what brand and exactly what you bought. Bc it sounds like you have a pucked race disc but then you say organic flywheel. Which leads me to believe it might be a really strong pressure plate with organic disk.
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Old 03-30-2013, 03:21 AM   #160
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Quote:
Originally Posted by Unabomber View Post
Your first mistake was that clutch as it is WAY too aggressive for that turbo....try reading my other FAQs first next time. You did not make a mistake with that turbo as they are WAY fun on a 2.0L....I have one for many years and still fondly recall it.
That's good to know. I'm "improving" my 2002 WRX and have been contemplating which turbo. The stock TD04 is a lot of fun. Not so sure I want to give it up for high end power.
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Old 03-30-2013, 08:58 AM   #161
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Quote:
Originally Posted by Maxwell Power View Post
thanks I was getting real confused as to what "factor" he was talking about.

As a tuner, I cannot tell you how many times I've seen customers with PnP turbos, factory headers etc make LESS power than guys without it.

Do not port the factory header.

If you aren't getting a tune, why would you change anything? A lot of mods that are done to increase flow can actually result in lower power output as the ecu now sees more air. In the case of my tunes, I add safety features to protect against extra air that would be seen in the case of boost spikes or boost creep. Increasing airflow on some cars after they are tuned will result in lower power output until they are retuned.

PnP the factory turbo? Pointless IMHO.
Why not have the factory headers/exhaust manifolds ported?
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Old 03-30-2013, 09:22 AM   #162
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Quote:
Originally Posted by 2011WRXMT View Post
Why not have the factory headers/exhaust manifolds ported?
he just posted it.
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Old 04-27-2013, 06:27 PM   #163
silverstreak02
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My wrx is my DD, and I don't want to go crazy with it. Having said that, would it be more beneficial to purchase a lightly used TD04 and AP for a tune rather than upgrading to something larger? I take my car to the mountains on some weekends, but its mostly just to get to and from work/home.

Thanks guys
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Old 04-28-2013, 12:26 AM   #164
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You don't need to purchase a used one, use the one you gots.
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Old 04-28-2013, 08:34 AM   #165
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We discovered a tiny crack on the down pipe side inside the housing...with roughly 11 years and 180K is that going to hold up? Not being a doom and gloomer, just a little worried
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Old 04-28-2013, 10:08 AM   #166
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Do you have VF-39? That is super common and no cause for worry. Its a common seen thing and only cosmetic.
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Old 04-28-2013, 11:15 AM   #167
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It's just a TD-04, I've been thinking of a VF39 upgrade, just more concerned with maintenance at the moment due to budget. Crack inside worried me, glad to hear its primarily cosmetic.
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Old 04-28-2013, 12:14 PM   #168
silverstreak02
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Thanks for your FAQ's, btw. Extremely useful for guys like me looking to learn everything about mods without getting way over my head with technical info
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Old 05-09-2013, 09:17 AM   #169
GC8TimeAttackNZ
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Just read the whole turbo FAQ. What a wealth of information. Definitely answered some questions I've had for a long time and gave me a headstart on my research for an eventual turbo upgrade.
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Old 05-16-2013, 04:30 AM   #170
thehanz123
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Would i benifit alot from getting the usual supporting mods for bigger turbos, for my PnP stock Td04?
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Old 05-16-2013, 08:00 AM   #171
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Quote:
Originally Posted by thehanz123 View Post
Would i benifit alot from getting the usual supporting mods for bigger turbos, for my PnP stock Td04?
A better intercooler would help along with a better fuel pump. Bigger injectors not so much.
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Old 05-16-2013, 10:27 AM   #172
thehanz123
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Quote:
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A better intercooler would help along with a better fuel pump. Bigger injectors not so much.
Thanks Quasimoto
- cmon feet..
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Old 05-17-2013, 08:09 PM   #173
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Quote:
Originally Posted by thehanz123 View Post
Thanks Quasimoto
- cmon feet..
you're the one asking the same question that has already been asked in this thread more than once!! Also.... a PNP TDO4? Reallly? What the hell do people think porting a turbo is going to do for you? Almost nothing.
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Old 06-13-2013, 12:33 PM   #174
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To me a PnP turbo sounds like a good idea. The more airflow the better right
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Old 06-13-2013, 01:47 PM   #175
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Love these info threads! Thanks for the info!
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