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3.4 pulley economy


cheezmunky
06-04-2004, 10:53 AM
I have been thinking about getting a 3.4" pulley for my supercharger but with high gas prices I was curious what that would do to the fuel economy, if anything?

rockford0384
06-04-2004, 06:01 PM
i didnt notice anything with my fuel economy changing other than having a lead foot for about 2 months. so yeah it went down but not really because of the pulley. BIG change in power

JoeJoe231455
06-04-2004, 09:58 PM
Yeah, your economy will go down in the first couple weeks only because you will be jabbing the throttle all the time to enjoy the new torque gain. Our supercharger has a bypass that is opened on the highway at cruising rpms which turns our boosted engines into 8:5\1 compression ratio economachines. I've seen zero decrease in fuel economy with a 3.4 or a 3.25 as long as I'm just cruising along. Cold air intakes, headers, and exhaust systems will actually help with mpg, or at least this has been my experience. I've seen a best of 31 mpg cruising @70 so far. The more extensive modifications will start chipping away at mpg.

carnutcass
06-07-2004, 04:37 PM
I hear ya on the gas prices.

I've had a 3.4" on mine for about a year and a half. Theseguys are right, your mileage will go down at first from you stomping the gas.....combine that with a CAI or FWI and your mileage will be horrible. Wrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr...........

So, the new is worn off and I have been averaging 20mpg from the last 10 or so tanks. My drive consists of about 50/50 highway/city.

leadfootGTP
06-20-2004, 05:23 PM
yeah your gas milage will go down, but your speed will go up. And in the end thats matters. seriously though, its a horsepower increase, like any other. If you want performance, you gotta pay the price. A new pulley is a great way to get that performance, thougth, for like 65 bucks, a 3" pulley can bring more than 35 horses to youre ride. no joke. You could, thought, meet performance half way and get like a 3.4" pulley, tht would only bring you up a little more than 25hp

GTPCatz
06-20-2004, 07:11 PM
I am getting 20 mpg on a 3.25 pulley....and I was getting about the same with a 3.0 Pulley

dropping Pulley size wont effect the gas as much as you would think

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