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Old 10-10-2012, 10:05 PM   #1
Uruchima
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Join Date: Jun 2012
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Question Next Tune Process: Stage 2

Hey guys,

I have a 2009 Impreza 2.5i with a Cosmo Racing CAI and a OBX catback and a Stage 1 Opensource tune by Phattbotti Tuning (STiMikey).

I was wondering what would be the next step to get a bit more HP/TQ?

A high-flow Fuel Pump with High-flow injectors (like the ones from the AVO turbo kit for 2.5i)

or would be more internals?
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Old 10-10-2012, 10:25 PM   #2
ShinjiML
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You already have the intake, get a HFC and you'll free up more of your exhaust bottleneck, then follow with a set of Delta 1500 cams to help move even more air and make even more power, finish it off with a tune!

This was what I wanted to do with my 2005 RS, but I never got to that stage...

so,

HFC + cams + your CAI and exhaust + Tune!
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Old 10-10-2012, 10:29 PM   #3
revin-it02
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Quote:
Originally Posted by ShinjiML View Post
You already have the intake, get a HFC and you'll free up more of your exhaust bottleneck, then follow with a set of Delta 1500 cams to help move even more air and make even more power, finish it off with a tune!

This was what I wanted to do with my 2005 RS, but I never got to that stage...

so,

HFC + cams + your CAI and exhaust + Tune!
This, but you finihed the cams part... Just not the tune .
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Old 10-10-2012, 10:40 PM   #4
rhino6303
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05 Legacy GT RBP

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I will save you the heartache; one of the only mods that is worthy of gaining hp is a twe el header. Search if you don't believe, it has been talked about over and over. Cams are cheap and easy but don't do what you would hope or expect.
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Old 10-11-2012, 07:52 AM   #5
NH8991
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TWE isn't the only one that produces a decent EL header, but it depends on your budget.

Cams - A year ago the only AVLS cam grind available from Delta was the 1000, I don't know if they've expanded their range since then. There are no massive gains anywhere as they are a 'torque grind' cam (to use Delta's expression).
The cams themselves are cheap, if you have to pay for labour then it gets pricey.

HFC - yep, you have 2, you can lose at least one and replace the other with a HF version.

Injectors/fuel pump - don't waste your money unless your stock ones are maxed out, which I doubt very much that they are.

Get a tune to optimise it all (with a higher octane fuel) and that's about it without spending really really silly money for minimal gains.

Then it's all about weight reduction....
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Old 10-11-2012, 09:18 AM   #6
ShinjiML
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Quote:
Originally Posted by revin-it02 View Post
This, but you finihed the cams part... Just not the tune .
Well, you continued where I left off

@Op, sorry forgot your car has AVLS, so your cams options are pretty limited...
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