Jack, did you put you stock airbox back in before you left? I
know I can drop about 1-2 mpg's with my FIPK out and the old
stock airbox back in. That combined with the speed you were
going, really does the MPG's in with the 3.92's.
At 70 mph my rpm's are 2500, I try to stay between 65-70
and it helps the milage quite a bit (18-18.5). I believe your
R/T runs at a lower rpm than mine at 70, So backing off will
probably help. Also a tonneau may help you gain a little mpg
back.
GS
98 5.2L 5spd 3.92SG
P&P TB HM FIPK
Tonneau
> Date: Tue, 15 Sep 1998 14:25:18 -0400
> From: Jack Hilton III <HEMI@charter.net>
> Subject: DML: One more thing about the R/T
>
> On the way to FL , I got a best MPG of only 15.2 .
>
> This was at about an average of 80 MPH with the A/C off and the tailgate up .
>
> I thought it was the JET II module and the air cleaner so I made the thing
> stock before I left to come home .
>
> I let the tailgate down too .
>
> On the way home , I got a best of 15.7 MPG at an average speed of 75 MPH
> with the air on and using the cruise .
>
> I am thinking that my less than desireable results at the strip and the low
> MPG figures may be clues to a deeper problem .
>
> What do you other R/T and NON-R/T guys think ?
>
> This trip was 700 miles one way and we only stopped for fuel and food (at
> the same time) .
>
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