Perrin Pulley - Subaru WRX Forum
 
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post #1 of 3 Old 08-19-2007, 01:36 PM Thread Starter
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Perrin Pulley

I just bought a Perrin Crank pulley.
what kind of HP gain are we talking about?

current mods:
VF39 turbo
Helix Downpipe
Blitz Nur-Spec RX catback
Perrin hose kits(turbo inlet hose/intercooler hose)
SPT short ram air intake
Turboxs delta EMS
walbro 255 pumps
OBX2 TMIC

291.11whp/321.13wtq 18psi
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post #2 of 3 Old 08-20-2007, 11:27 AM
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You're not getting any more HP out of the motor. You're just taking away some parasitic loss so that some of the HP your motor does make is not absorbed by rotating the stock heavy pulley, but rather is translated to the wheels. So you are effectively putting a couple more ponies down to the ground. Not really sure how much though.

Shaun
Protuned STI Limited #262
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post #3 of 3 Old 08-20-2007, 03:05 PM Thread Starter
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wow ok.
thank you for your information~ ^^

291.11whp/321.13wtq 18psi
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