3.5 pulley and gas milage - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 04-07-2006, 01:10 PM   #1
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Default 3.5 pulley and gas milage

I'm ready to place another order with Intense, but not sure what to buy. I'm either going to buy a 3.5 modular pulley system, new tensioner, and NGK plugs, or an Aerotech interceptor gauge. My questions is, if I go with the smaller pulley, will my gas milage go down? At the moment I'm getting 17.8 in the city and 29 highway. Thanks.....
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Old 04-07-2006, 01:13 PM   #2
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of course, cuz you will get on it more!

the scan guage is a good first mod... so you can watch how ur car likes the mods
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Old 04-07-2006, 02:00 PM   #3
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Under normal driving, mine never suffered with the 3.4.
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Old 04-08-2006, 12:34 AM   #4
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It all depend how much youll get on throttle

Still getting 27 miles/gallon on highway with the 3.4, and headers.
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Old 04-08-2006, 01:48 AM   #5
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Yeah it shouldn't affect anything if you don't get into high boost.
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Old 04-08-2006, 03:35 AM   #6
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Gas mileage will be unaffected assuming the car is driven the same. With the new pulley however you will want to get on it more often and therefore your gas mileage will probably suffer. Some mods will actually increase your gas mileage actually. (not a pulley, but some mods)

Shawn
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