Pulley size, is this smaller pulley safe to run?
10-15-2018, 02:42 PM
#1
Too much acceleration
Thread Starter
Pulley size, is this smaller pulley safe to run?
Couple of questions for you guys…..I have a 2015 F-150, I’ve had the whipple supercharger installed for about a year now. The kit shipped with a 3.875 pulley. I want to go with a 3.625 pulley. Whipple said the only size they recommend is the 3.75. Are they being conservative? I live in South Carolina, I have 93 readily available. I tow about twice a year. Will I be safe going with the 3.625 pulley? I have the stock throttle body, so will this change even make a difference? Will I be ok with the whipple tune or will I need a new tune? This is a daily driver so I’m interested in reliability. I read someone was running a 3.5 with no issues, but I can’t remember who.
Thanks
Thanks
Last edited by turbobusa; 10-15-2018 at 02:56 PM. Reason: left out an important detail
10-15-2018, 02:48 PM
#3
Senior Member
Couple of questions for you guys…..I have a 2015 F-150, I’ve had the whipple supercharger installed for about a year now. The kit shipped with a 3.875 pulley. I want to go with a 3.625 pulley. Whipple said the only size they recommend is the 3.75. Are they being conservative? I live in South Carolina, I have 93 readily available. I tow about twice a year. Will I be safe going with the 3.625 pulley? Will this affect my fuel mileage? Will I be ok with the whipple tune or will I need a new tune? This is a daily driver so I’m interested in reliability. I read someone was running a 3.5 with no issues, but I can’t remember who.
Thanks
Thanks
3.5 can be run with good 93
11-16-2018, 01:36 PM
#5
Senior Member
Gonna bump this thread back up - what's the general consensus for pulley size on 91 octane? I'm looking at taking advantage of the Black Friday sales and picking up a Gen 3 Whipple kit with the bigger throttle body and fans for my '15 and the best fuel I can get in this region is 91 octane at the pump. Can I drop down to a 3.625" pulley on the whipple calibration and still be OK on the 91? Another thing I'm taking into consideration is the density altitude here in MT, which varies from 5-6000 in the summers down to 1000 or less in the winters. I used to pulley down a size on my Mustang in the summers to make up for it. I rarely do any towing if at all, but figure I can easily swap pulley sizes if needed. Any input?
11-16-2018, 01:50 PM
#6
Senior Member
I would get the 3.625 pulley or You could start with the 3.750 and work your way down.
11-17-2018, 05:22 AM
#7
Too much acceleration
Thread Starter
Gonna bump this thread back up - what's the general consensus for pulley size on 91 octane? I'm looking at taking advantage of the Black Friday sales and picking up a Gen 3 Whipple kit with the bigger throttle body and fans for my '15 and the best fuel I can get in this region is 91 octane at the pump. Can I drop down to a 3.625" pulley on the whipple calibration and still be OK on the 91? Another thing I'm taking into consideration is the density altitude here in MT, which varies from 5-6000 in the summers down to 1000 or less in the winters. I used to pulley down a size on my Mustang in the summers to make up for it. I rarely do any towing if at all, but figure I can easily swap pulley sizes if needed. Any input?
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11-17-2018, 10:40 AM
#9
Senior Member