Silverado, Sierra & Fullsize Pick-ups The Silverado & Sierra have been two of the best selling trucks in the US for decades, and is truly proven to be "like a rock".

2014 Chevy Silverado
Platform: Truck, GMT 400, 800, & 900

670cfm holley throttle body

Old Aug 10, 2006 | 5:26 AM
  #1  
firered89's Avatar
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Default 670cfm holley throttle body

hey guys...

i ordered one of these today and i must say that im very excited. they say the horse power and torque will increase by 25%. have any of you tried one of these? i hear they are excellent and add alot of power. this plus my new spacer should bump me up over 300hp. any comments?
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Old Aug 10, 2006 | 8:47 PM
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Default RE: 670cfm holley throttle body

Im interested in this but what year, engine, etc is your truck. I havnt heard of this as of yet.
Thanks
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Old Aug 11, 2006 | 6:17 AM
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Default RE: 670cfm holley throttle body

ahhh...sorry i left that out.

i have a 1989 single cab 5.7L 350 Chevrolet Silverado. i believe they are about 220hp or so stock.
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Old Aug 11, 2006 | 10:37 AM
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Default RE: 670cfm holley throttle body

so your just replacing the stock throttlebody with an aftermarket one?
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Old Aug 16, 2006 | 12:26 AM
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Default RE: 670cfm holley throttle body

well, i installed it today...i can tell it added some serious power, but i cant tell exactly how much because of the unresolved jerking problem in my truck...it really slows down my performance. as for acceleration and taking off....dannggg...lol. the stock was 500cfm or around that. i can really feel the torque with this one. worth the money.
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