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Old 02-21-2001, 11:58 PM   #1
Scooby Newbie
Member#: 2677
Join Date: Oct 2000
Location: South Bend, Indiana
2001 Lexus IS300

Post What stock internals need to be replaced to run 10 PSI safely and reliably? (EJ25)

Just need some input. Cobb Camms are already on the list but what else?
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Old 02-22-2001, 12:01 AM   #2
Scooby Guru
Member#: 329
Join Date: Sep 1999
Chapter/Region: Tri-State
Location: NJ
1995 325i
Arctic Gray


None, providing the motor is tuned correctly.

Edit: by internals, I'm assuming you mean the stuff inside the block.

[This message has been edited by RidinLow (edited February 21, 2001).]
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Old 02-22-2001, 12:03 AM   #3

Member#: 922
Join Date: Feb 2000
Chapter/Region: MWSOC
Location: Schaumburg, IL
16 WRX (white)
04 FXT (red)


Transmission & rear diff helps.
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Old 02-22-2001, 12:28 AM   #4
Scooby Specialist
Member#: 3115
Join Date: Dec 2000
Chapter/Region: AKIC
Location: Anchorage,AK USA
2002 Impreza 2.5RS


Yeah nothing needs to be changed, just ask Shiv over at http://www.vishnuperformance.com/ Him and his Tec-II work well for Hi PSA

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Old 02-22-2001, 12:38 AM   #5
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Member#: 2692
Join Date: Oct 2000
Chapter/Region: SCIC
Location: SoCal & TX

I'd go a step extra and get a set of pistons
with slightly lower compression (as long as you stick to 10psi, you're not a boost junkie, are you )

[This message has been edited by kaos200 (edited February 21, 2001).]
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Old 02-23-2001, 01:23 AM   #6
Homicidal Maniac
Member#: 1612
Join Date: Jun 2000
Location: Austin, TX
2008 STI


If the RS is a MY98 or MY99, then you should be fine with basic engine management. If it is a MY00+, then there was an increase in compression ratio and, therefore, a lower maximum boost. Full engine management would probably be the best thing in that case.

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