I've got an '03 Hemi Ram with a bit over12,000 miles on it. Can't say enough about how much I like the rig overall..............I haven't played around with cars since the 60's, when I had my GTX, so I don't know squat about modern stuff, and all the junk for EPA requirements.</P>


BUT, I had to try some stuff with the Hemi.....hehehe</P>


1.... a K&amp;N filter.......mileage went to about 17.5 highway.</P>


2.....Flowmaster..1 in/ 2 out....best I got in the sumer was 19.5 on a long trip with premium fuel. Recently with the cold here in Mass., the mileage took a nose dive. Try 9 in the City, and 14 on the Highway.</P>


Do you think it's the change in weather that's making the mileage go south ?</P>


Thanks for replies.........Wally</P>


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That is exactly why. Colder air is denser and as such requires more fuel to keep the A/F(air/fuel) ratio the same(stoich). It does create more power though, but at the cost of lower fuel mileage.

 

so when the summer roles around i will get better milage? i'm going to check tonight to see what i'm getting, i'm guessing its ok i'm gettin about 230-270/tank, and thats with usually one highway trip

 

Yes, when summer comes your fuel mileage will increase some. With my cold air induction and other modifications on my R/T and winter in full force, I've noticed a big drop in my fuel mileage from what I get in the summer. <img border="0" src=smileys/smiley5.gif border="0">

 

71 ROADRUNNER:</P>


Do you think a chip might give a little better gas mileage, year round ? Or, how about those throttle body risers ?.......</P>


Don't get me wrong, the mileage isn't a $ factor, I just like to get the best I can, without going wild on mods.</P>


Wally</P>

 

Most aftermarket computers are tuned for power increase and not fuel mileage. They advance the timing more and add more fuel to increase the power, which makes the fuel mileage drop a little, and most require higher grades of fuel.

A throttle body riser will do nothing except waste your money. Spacers for carburators are great. The main reason a riser/spacer works for a carburator and not a throttle body is because the carburator holds the fuel in it's bowls and the spacer helps insulate the fuel and the carburator from the engine heat. Since throttle bodies do not hold the fuel, the spacers really do nothing for them.

 

Just a question , but doesnt humidity play a factor as well,more water in the air taking up space ?</P>


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Humidity does play a part in the performance of a vehicle, but not much.

 

K thanks Runner

 

Not a problem. <img border="0" src=smileys/smiley2.gif border="0">