Fuel economy...... considerations - 03/05/11 06:59 PM
With the price of gas heading north of $1.50/L here and most likely over $5.00 a gal in the US, the need to improve operation efficiency is going to become a real issue this season.
Alternatives are:
1) do something to improve it
2) buck up
3) don't drive as much
Seems the first item folks consider is to turn the engine slower - good start. However, when an OD goes in you probably see a smaller increase than you hoped for and the throttle response gets really soggy due to poor fuel metering. At low flow speeds the fuel puddles out in the intake.
So either go to a smaller carb that has more than 2 mixture settings (like a monojet) and increase the signal(flow velocity) to the venturi or change to signal insensitive fuel metering.
18-20 MPG @ $5/gal is not much fun. $25 to go 100 miles sucks.
Options are available to assist with this problem, but it will require a change in thinking.
I fear that this will be real difficult for some folks here to make the jump and they may choose to park their rides instead.
For myself I'm considering giving up some power and going back to my stock 4200 cams to get some mileage. At my current power level 16 MPG highway is inconsistent with my plans to travel with the truck this year. I am also changing to sequential injection to try and squeeze more eff. out of my setup.
Alternatives are:
1) do something to improve it
2) buck up
3) don't drive as much
Seems the first item folks consider is to turn the engine slower - good start. However, when an OD goes in you probably see a smaller increase than you hoped for and the throttle response gets really soggy due to poor fuel metering. At low flow speeds the fuel puddles out in the intake.
So either go to a smaller carb that has more than 2 mixture settings (like a monojet) and increase the signal(flow velocity) to the venturi or change to signal insensitive fuel metering.
18-20 MPG @ $5/gal is not much fun. $25 to go 100 miles sucks.
Options are available to assist with this problem, but it will require a change in thinking.
I fear that this will be real difficult for some folks here to make the jump and they may choose to park their rides instead.
For myself I'm considering giving up some power and going back to my stock 4200 cams to get some mileage. At my current power level 16 MPG highway is inconsistent with my plans to travel with the truck this year. I am also changing to sequential injection to try and squeeze more eff. out of my setup.