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Old 01-09-2016, 08:37 AM   #1
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15 HP from a Underdrive pulley? That sounds pretty optimistic to me. Please show me the make on that one, I think everyone would want one. The most claim I've seen is about 5HP
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Old 01-09-2016, 08:51 AM   #2
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15 HP from a Underdrive pulley? That sounds pretty optimistic to me. Please show me the make on that one, I think everyone would want one. The most claim I've seen is about 5HP
I would agree with you here. 5hp maybe stretching too. Lastly if you combine this setup with a lightweight battery the negative effects is not worth the effort for a street car. Under drive pulleys are meant for high rpm drivin, lightweight batteries doesn't have the required amp for typical street driving.

Be careful on your diet selection combo.
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Old 01-09-2016, 09:15 AM   #3
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I would agree with you here. 5hp maybe stretching too. Lastly if you combine this setup with a lightweight battery the negative effects is not worth the effort for a street car. Under drive pulleys are meant for high rpm drivin, lightweight batteries doesn't have the required amp for typical street driving.

Be careful on your diet selection combo.
My experience confirms this 4-5 HP., but it was the cheapest performance increase I have.

Want another cheap gain 3-4 HP buy a shorter serpentine belt and skip the AC pump

My light weight battery starts the car fine in street use my car see about 7,000 miles a year never had an issue. It's 18 months old never on a tender.
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Last edited by jsceash; 01-09-2016 at 09:31 AM. Reason: added comment
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Old 01-09-2016, 11:33 AM   #4
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Got rid of my girlfriend @ about 105 lbs. and went on a vegetarian diet and lost 40 lbs, so far. 145 lbs weight loss and I feel like a new man and the car moves a little bit quicker.:dance:
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Old 01-09-2016, 01:19 PM   #5
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stripped out autocross weapon, hell yeah!!!
Ok, carbon or fiberglass hood will drop 30lbs
Swapping full power seats for fiberglass race seats are worth 50+
Get a hardtop and lose the convertible top, then run around with nothing and you'll lose 70ish.
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Old 01-09-2016, 02:22 PM   #6
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I took all this out plus the foam insulation on the back of the carpets and lost 91.5 lbs. I've decided I'm also going to remove the airbags and speakers too.
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