383 vs 350 MPG

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Sep 8, 2003 | 10:02 PM

Tennessee4x4

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Joined: Jul 2003

Posts: 26

383 vs 350 MPG

Hey guys, what kind of mileage are you guys getting for gas mileage with a simple lt-1 350 with bolt ons, compared to the 383 with mild cam.

Sep 8, 2003 | 10:14 PM

Got-LT1

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Joined: Mar 2002

Posts: 811

From: tallahassee, FL

I wouldn't know firsthand, but most of the time, with good tuning, a 383 will not have much worse gas milege then a bolt-on LT1.

Sep 8, 2003 | 10:18 PM

TreySpeed

On permanent vacation

Joined: Aug 2003

Posts: 520

From: Michigan is a decent state.

Quote:

Originally posted by Got-LT1
I wouldn't know firsthand, but most of the time, with good tuning, a 383 will not have much worse gas milege then a bolt-on LT1.

I added a 383 and a much big cam (xe 230/236), 2400 stall, poor tuning and a HUGE exhuast leak. CAr was running pig rich. lost 4 mpg or so with an auto 3.73. without an exhuast leak id venture to say 20mpg +

Sep 9, 2003 | 12:59 AM

neat

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Joined: Jul 2001

Posts: 221

From: Raleigh, NC

I get about 21-25 on the highway and 13-15 around town. My stuff is pretty agressive though.

BTW, its a 6 speed.

Sep 9, 2003 | 02:20 AM

Zepp

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Joined: May 2003

Posts: 243

From: Miami, FL

I am getting around 12-15mpg around town. That is with aggressive driving in the city.

I am not sure about highway because all my driving is city only.

Sep 9, 2003 | 10:57 AM

White Z 4 Show

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Joined: May 2002

Posts: 393

From: Roanoke, VA

94 A4 350 stock engine, !Cat, CAI, MSD 8.5 MM S/C wires, & Bosch Plat plugs

14-17 city (220 miles)
20-24 highway (340 miles)

I also think I have bad O2 sensors

Sep 9, 2003 | 11:36 AM

96z

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Joined: Jul 2000

Posts: 2,735

From: Buffalo, NY

My gas mileage on the throughw is 22 mpg. This is with a decent tune. With a real good tune in the lower RPM's I could maybe see 24-25 mpg. But you gotta keep your foot out of it too.