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Topgunz - air to air upgrade

Originally Posted by redondoaveb I just had Specialty Z install my 2.85" supercharger pulley. My old numbers with the 9lb pulley were 541whp 440 torque @ 10 psi. My new

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Old 06-20-2018, 07:44 AM   #1 (permalink)
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I just had Specialty Z install my 2.85" supercharger pulley. My old numbers with the 9lb pulley were 541whp 440 torque @ 10 psi. My new numbers with the 2.85 pulley addition are 586whp 486 torque @ 12.86 psi.
https://www.instagram.com/p/BkMC8SyF...=1v0kruqzp88uj
Wow is that just with Si impeller or did you change the jackshaft as well?
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Old 06-20-2018, 09:03 AM   #2 (permalink)
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Wow is that just with Si impeller or did you change the jackshaft as well?
Jackshaft is stock. If I was strictly running e85 I would have had the 3.47 jackshaft installed but I'm on flex fuel (91 octane). Seb had to dial back the timing on 91 as it is on 12.86 boost.
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