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Upgrade path - daily driver
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Old 25 Aug 2010, 02:54 PM   #1 (permalink)
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Upgrade path - daily driver

So I am looking to buy a 04-05 STI in the week or two and wanted to start shopping for mods. This will be my daily driver so I need a somewhat reliable build. Here is my estimated grocery list:

255 fuel pump
800 cc injectors
larger TMIC
turboback exhaust
new intake (not sure which kind)
engine management (not sure which kind)
turbo (most power on stock internals)

The only two upgrades I don't want to make are FMIC and re-building the block. I want to make the most power I can without changing those two components.

Am I over looking anything?
What turbo/management would you suggest?

Thank you to all those who respond.
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Old 26 Aug 2010, 05:17 AM   #2 (permalink)
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Re: Upgrade path - daily driver

I think the 800cc injectors would be excessive for your needs,650cc would cover your needs( I'm sure I'll be corrected if I'm wrong) as 800cc could cope with very large bhp the likes of which STD inturnals couldn't cope with. Unless it's already on the car you also need a 3" full decat ( turbo back) if your aims are towards the 400bhp mark.
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Old 26 Aug 2010, 08:05 AM   #3 (permalink)
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Re: Upgrade path - daily driver

2004 sti standard internals will cope with 450bhp.

agree that 800cc are overkill, I have maxed out my 650cc at 450bhp on standard fuel pressure.
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Old 26 Aug 2010, 11:38 AM   #4 (permalink)
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Re: Upgrade path - daily driver

sc46 turbo and then prob syvecs ecu, turbo and management wise.

although it realy depends on how much you want to spend. Also the top mount is going to be a real limiting factor on that list.
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Old 26 Aug 2010, 11:54 AM   #5 (permalink)
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Re: Upgrade path - daily driver

i certainly stand to be corrected here but from what i have been told previously wouldnt he be as well sticking with standard management, it had knock sensor etc all built in where as the cheaper aftermarket dont.
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Old 26 Aug 2010, 11:55 AM   #6 (permalink)
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Re: Upgrade path - daily driver

the standard ecu is capable of in excess of 400bhp.
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Old 26 Aug 2010, 11:57 AM   #7 (permalink)
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Re: Upgrade path - daily driver

Quote:
Originally Posted by 816SubaruSTI View Post
So I am looking to buy a 04-05 STI in the week or two and wanted to start shopping for mods. This will be my daily driver so I need a somewhat reliable build. Here is my estimated grocery list:

255 fuel pump
800 cc injectors
larger TMIC
turboback exhaust
new intake (not sure which kind)
engine management (not sure which kind)
turbo (most power on stock internals)

The only two upgrades I don't want to make are FMIC and re-building the block. I want to make the most power I can without changing those two components.

Am I over looking anything?
What turbo/management would you suggest?

Thank you to all those who respond.
Also im looking for sti injectors, TMIC, and turbo for upgrades to mine, so let me know once they are available and i will buy yours. Thats if your selling them
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Old 26 Aug 2010, 12:03 PM   #8 (permalink)
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Re: Upgrade path - daily driver

personaly i wouldn't want to run that high power on a maf sensor, hence going down the syvecs route. bit like tyrign to save 15-20% of the cost at the risk of the engine.

cheaper option would be simtek, but that doesn;t come with active nock control, which has be promised for 12 months + yet never been released. Also people have been complaining about lumpy running it and switching to syvecs
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Old 26 Aug 2010, 12:17 PM   #9 (permalink)
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Re: Upgrade path - daily driver

why not?

is it because MAFs can fail?
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Old 26 Aug 2010, 12:27 PM   #10 (permalink)
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Re: Upgrade path - daily driver

yep, don't trust em at all. plus the mapper has more adjustment ability on a aftermarket ecu compared to the standard one
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Old 26 Aug 2010, 12:29 PM   #11 (permalink)
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Re: Upgrade path - daily driver

the newage mafs are not fragile and can be recalibrated in the ecu.

the standard ecu is a very capable piece of kit.
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Old 26 Aug 2010, 01:06 PM   #12 (permalink)
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Re: Upgrade path - daily driver

intresting info,
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Old 30 Aug 2010, 02:10 PM   #13 (permalink)
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Re: Upgrade path - daily driver

Quote:
Originally Posted by jd View Post
2004 sti standard internals will cope with 450bhp.

agree that 800cc are overkill, I have maxed out my 650cc at 450bhp on standard fuel pressure.
where do you get the idea 800s are overkill? if your 650s are maxed out perhaps you should go to 800s
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Old 30 Aug 2010, 02:27 PM   #14 (permalink)
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Re: Upgrade path - daily driver

why not
Quote:
Originally Posted by 816SubaruSTI View Post
So I am looking to buy a 04-05 STI in the week or two and wanted to start shopping for mods. This will be my daily driver so I need a somewhat reliable build. Here is my estimated grocery list:

255 fuel pump
800 cc injectors
larger TMIC
turboback exhaust
new intake (not sure which kind)
engine management (not sure which kind)
turbo (most power on stock internals)

The only two upgrades I don't want to make are FMIC and re-building the block. I want to make the most power I can without changing those two components.

Am I over looking anything?
What turbo/management would you suggest?

Thank you to all those who respond.
why dont you want a fmic?
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Old 30 Aug 2010, 05:49 PM   #15 (permalink)
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Re: Upgrade path - daily driver

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Originally Posted by sloscoob View Post
where do you get the idea 800s are overkill? if your 650s are maxed out perhaps you should go to 800s
The OP has stated that 400bhp is the target, why go to 800cc injector?

I am planning on uprating the fuel pressure to give me head room.

There is no point oversizing for the sake of it. Why not nabg on a GT40 to be safe?
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