Need better MPG
#31
01-13-2012, 08:26 PM
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Yes. The hemi's have it and it's called MDS (Multi-Displacement System) and it disables 4-cylinders at cruising speed.
#32
01-13-2012, 08:28 PM
#33
01-13-2012, 08:47 PM
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#34
01-13-2012, 09:07 PM
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#35
01-13-2012, 09:24 PM
If you want to spend the money...
I started out where you're at. 9-10 MPG in town in the winter, 10-11 MPG in the summer.
After electric fans, new O2 sensor, better air intake, opened up throttle body, intake manifold smoothed out, and SCT tuner, I now get 12-13 in town. I have a heavy foot.
For those 2 or 3 MPG, I spent a lot of money. I will never make it back.
Of course, I didn't really spend it for the MPGs, but for the power.
I started out where you're at. 9-10 MPG in town in the winter, 10-11 MPG in the summer.
After electric fans, new O2 sensor, better air intake, opened up throttle body, intake manifold smoothed out, and SCT tuner, I now get 12-13 in town. I have a heavy foot.
For those 2 or 3 MPG, I spent a lot of money. I will never make it back.
Of course, I didn't really spend it for the MPGs, but for the power.
#36
01-15-2012, 05:07 PM
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Any/all fuel economy gains with nitrogen are due to the fact that the tires were underinflated before some guy put in some expensive gas and those cute green caps on your valve stems. That's 100% of the effect. You can get the same benefit by checking/adjusting your tire pressure once each month like the owner's manual says you should.
Zero ohm wires, well... the pink unicorns seem to like 'em just fine but the flying dragons think they taste just like chicken, and dragons don't like chicken.
Zero ohm wires, well... the pink unicorns seem to like 'em just fine but the flying dragons think they taste just like chicken, and dragons don't like chicken.
It doesn't leak past the rubber as easily as ordinary air, is a bit better at elevated tire temps (fast driving) because it doesn't heat like air so hot tire PSI stays lower. So, it's a better gas for inflation, but not so much better that it's necessary. Checking inflation pressure often is a hot mileage tip, though. No problem mixing air and nitrogen as far as compatibility goes; you lose some of the advantages as the ratio changes.
Last edited by Johnny2Bad; 01-15-2012 at 05:14 PM.
#37
01-17-2012, 01:09 PM
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So true.
When my truck still had the 360 in it I managed to get the mpg to 16.9 mixed highway and town and to 21 on straight highway with a MP ECU. It is a 4by4 shortie.
It took MP headers,R/T heads,1.7 rr's, 52mm Billet Holley TB.,CAI,MSD ignition,MSD coil and wires,gasket matched intake, port and polish on the heads,high volume oil pump,synthetic oil in engine..rear ends..transfercase, and then you add the MP ECU and put a set of 285-75 tires on.(throw those 265 stock ones away)
So when Jason says you will never recover your costs to get MPG improvements it is so true. You will recover form your increased Hp tho!
It took MP headers,R/T heads,1.7 rr's, 52mm Billet Holley TB.,CAI,MSD ignition,MSD coil and wires,gasket matched intake, port and polish on the heads,high volume oil pump,synthetic oil in engine..rear ends..transfercase, and then you add the MP ECU and put a set of 285-75 tires on.(throw those 265 stock ones away)
So when Jason says you will never recover your costs to get MPG improvements it is so true. You will recover form your increased Hp tho!
#38
01-17-2012, 05:45 PM
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