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Roush pulley sizes

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Roush pulley sizes

Post  Coyote Jeff on Mon Nov 30, 2015 3:02 pm

Hi gang. Has anyone tried the different size pulleys on the 2015 Roush 670 hp kit for a 2015 GT? I have a 2015 GT and just had the Stage 1 670 hp kit installed along with BBK high flow cat headers and 3" x-pipe and exhaust on Roush axle back exhaust. I am at 9psi on the factory 85mm pully and am wandering what gains could be made with the 82mm-79mm....anyone try this on a dyno?
Thanks
Jeff

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Re: Roush pulley sizes

Post  shelby69 on Thu Jan 07, 2016 12:32 pm

hi there, seen some info here http://vmptuning.com/11-14-roush-pulleys/

85mm pulley 9-10psi

82mm pulley 10-11psi

79mm pulley 11-12psi

75mm pulley 12-13psi

72mm pulley 14-15psi

69mm pulley 15-16psi

a few of the guys have superchargers in the club, where im still stick with the older carbeurated stuff Smile
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rough pulley sizes

Post  Coyote Jeff on Thu Jan 07, 2016 2:22 pm

Thanks Shelby69 thats exactly what i was looking for bounce bounce

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Re: Roush pulley sizes

Post  shelby69 on Thu Jan 14, 2016 2:29 pm

glad to help, post up some pics of your car and the engine mods, would be neat to see.
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Re: Roush pulley sizes

Post  Coyote Jeff on Thu Jan 14, 2016 3:43 pm

shelby69 wrote:glad to help, post up some pics of your car and the engine mods, would be neat to see.
Hi Shelby 69 i have posts on the face book page

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