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Engine Management and ECU Remapping This section is to discuss the various aspects of engine management modification for your Subaru.

Max boost pressure

Old 09 September 2017, 07:55 AM
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Jon T
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Default Max boost pressure

Hi. Whats the max boost pressure you can run on a forged 2.5 sti.?
Old 09 September 2017, 09:47 AM
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domino46
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I'm running 1.75bar but can't see why it wouldnt do a bit more if I wanted but I'm happy with it as it is
Old 09 September 2017, 10:10 AM
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scoobiepaul
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I know it's only got forged pistons but my mark one Litchfield only runs 1.26 bar.
Old 09 September 2017, 12:40 PM
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Jon T
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What bhp are you making at1.75 bar?
Old 09 September 2017, 02:02 PM
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Depends on spec........ and bravery!
Old 10 September 2017, 06:04 AM
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domino46
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Originally Posted by Jon T
What bhp are you making at1.75 bar?

531bhp
Old 10 September 2017, 09:24 AM
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trevsjwood
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Originally Posted by domino46
531bhp
that can't be on a standard block with just forged pistons?
Trev

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Old 10 September 2017, 09:29 AM
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Originally Posted by trevsjwood
that can't be on a standard block with just forged pistons?
Trev

OP doesn't say anything about the block just forged 2.5 but yes mine is a closed deck 2.5 with 14mm head studs
Old 07 October 2017, 11:28 PM
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ustolemyname??stevieturbo
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Originally Posted by Jon T
Hi. Whats the max boost pressure you can run on a forged 2.5 sti.?
Change psi to cm and as much as that piece of string.


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