All depends , how much boost you running and Dyno you used . I went from 496 awhp on the 32t standard Vortech pulley @ 6.4 psi , to 537 awhp with the 30t pulley making 8.1 psi using an AWD Mustang Dyno . End up running 10.93@122 , if we go by Dyno numbers I'D say you should be right were I was
__________________ 07 JEEP SRT8 _ SOLD
Tuned By Johan
12.13 @ 110 N/A Cam & Headers
6.90 @ 101 & 10.93 @ 122 Boosted @ 9lbs
Point of reference on a bone stock 6.1 and vortech with corsa car back, I swapped to the 30T, and picked up enough knock that once retuned I ended up literally at square one,
I raced my brothers bone stock vortech and corsa and we were literally dead even time and time again. Timing had to go from 13 or so down to 10, erased all gains. Boost in cold temps was cracking 11psi at 6400rpms, 9.5lbs now that it's hot.
I strongly recommend a flow adder mod with any more boost on the vortech, like a cam or headers or both, keep the boost below 10 an you'll see a good gain.
Or do what I did...get some meth. 50/50 mix and I'm at 9.5psi an 14* of timing. Took 3/10s off my 0-60, so I'm guessing 50-75whp added net. If u go this route don't cheap out, I have a failsafe system, lots o warnings built in. I'm looking for a good solenoid to open the bypass if flow failsafe is triggered as well.
Summary: don't just swap the pulley, you'll just end up tuning back to square one.
PWR Forged 371, FR-223 Cam, OBX catless headers, Corsa Catback, Paramount Trans/Convertor, Johan Special Sauce
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