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Old 09-22-2013, 04:35 PM   #1
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Pulley problem

I just got some mods done to my car one of which was a 2.5 vmp pulley and now when I'm in 3rd gear at half throttle my boost fluctuates up and down making the car jerk a bit wondering if anyone's run into this problem before if it is a problem
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Old 09-22-2013, 04:38 PM   #2
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Without tune?
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Old 09-22-2013, 04:47 PM   #3
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With a tune
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Old 09-22-2013, 04:48 PM   #4
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Was about to say that was your problem. Can u find out what ur air to fuel ratio is?
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Old 09-22-2013, 05:00 PM   #5
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Good call I could try data logging it and send it to bama
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Old 09-22-2013, 05:01 PM   #6
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I would
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Old 09-22-2013, 05:21 PM   #7
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I would contact Justin at VMP...shoot him your data log and he can get it straightened for ya
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Old 09-22-2013, 05:23 PM   #8
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Good call I could try data logging it and send it to bama
Bama is your problem
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Old 09-22-2013, 05:41 PM   #9
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If you are going to run a email tune on a blower car, get away from bama. Go with VMP I used jason on my 08 roush. I had no problems with his tune at all.
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Old 09-23-2013, 04:15 AM   #10
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" I just got some mods done to my car one of which was a 2.5 vmp pulley "
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Was one of the mods a throttle body ?
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Old 09-23-2013, 04:43 AM   #11
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I have the 2.5 pulley from VMP and a tune from BAMA. My car is perfectly fine.

It sounds like u r already on the right path. I would check my cai and make sure it is tight. I immediately wondered about a tb as well.
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Old 09-23-2013, 05:23 AM   #12
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" I just got some mods done to my car one of which was a 2.5 vmp pulley "
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Was one of the mods a throttle body ?
Did you do it to the new one? If so what HP gain did you get? I have to wait until next year after I get gong on my 68 coupe and figure out what that will cost.
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Old 09-23-2013, 11:30 AM   #13
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No throttle body just the pulley CAI headers off road X corsa mufflers and a tune it's about 750 at the crank.
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