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Old 03-30-2009, 02:37 PM   #1
godforbid67
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Member#: 137168
Join Date: Jan 2007
Chapter/Region: South East
Location: ummm..... Andrewtech ftmfw!
Vehicle:
06 Built SGM WRX
35r, PPG, 280's, PSS9.

Default how high to rev?

haha this is about my 4th thread this week in here but w/e. my build is
Cp custom cut pistons
brian crower rods
arp head studs
new oem crank
jdm sti oil pump
280/280 custom brian crower cams
brian crower springs and retainers
cosworth bearings
full gaskets including cosmetic head gasket
i think thats it
what do you think i could rev it out too? my builder/tuner says its good to 8k.
i will be running the bolt on atp 35r on meth 25 pounds or so daily. thanks for any help.
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Old 03-30-2009, 03:06 PM   #2
Nuke209
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Location: Minnesota
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2003 WRX
NF Performance

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you should state in this thread which block this is?
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Old 03-30-2009, 03:10 PM   #3
godforbid67
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35r, PPG, 280's, PSS9.

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sorry its an ej257 out of an 08 sti. does that really even matter if everything has been replaced?
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Old 03-30-2009, 03:18 PM   #4
jays05
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05 STI 35r + e85

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Listen to your engine builder / tuner but take into account your oil pressure (which you won't know till it is running).
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Old 03-30-2009, 03:20 PM   #5
godforbid67
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Join Date: Jan 2007
Chapter/Region: South East
Location: ummm..... Andrewtech ftmfw!
Vehicle:
06 Built SGM WRX
35r, PPG, 280's, PSS9.

Default

yeah i plan to listen to him, just wanted to see what some of you guys think of revving it that high.
what exactly is your concern with the oil pressure?
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Old 03-30-2009, 03:24 PM   #6
jays05
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Quote:
Originally Posted by godforbid67 View Post
what exactly is your concern with the oil pressure?
The old 10psi/1000rpm rule of thumb. So if you see for instance 70psi oil pressure up top, it might not be wise to rev to 8k.


FWIW I have pistons/rods/oem crank/10mm pump, rev to 7800 (max redline per my engine builder) and have around 85psi oil pressure up top.
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Old 03-30-2009, 03:25 PM   #7
godforbid67
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Join Date: Jan 2007
Chapter/Region: South East
Location: ummm..... Andrewtech ftmfw!
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06 Built SGM WRX
35r, PPG, 280's, PSS9.

Default

hmmm and the jdm pump is 10mm right?? so basically we are in the same boat. do you have cams?
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Old 03-30-2009, 03:32 PM   #8
jays05
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jdm = 12mm. I have cosworth cams, supertech valvetrain, etc. and an ATI Balancer which makes me feel better about pushing the rev limit.
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Old 03-30-2009, 04:02 PM   #9
godforbid67
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Chapter/Region: South East
Location: ummm..... Andrewtech ftmfw!
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06 Built SGM WRX
35r, PPG, 280's, PSS9.

Default

so personally what would you rev with my motor if it was in your car?
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Old 03-30-2009, 04:33 PM   #10
alcoolaid
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It really depends on what bearing clearances you have.
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