Quote:
Originally Posted by Chris74
Seele: What kind of affect did the 4.56's have on your fuel economy........on average? Did it really drop off?
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Not really a differance at all. In town I average anywhere between 14.5-15.5, and I have had it almost to 19 on the highway taking a trip up I95. I only did it to compensate for the 35's. The real differance is in my speedo which is waaaaaay off! LOL. Soon as I get my Gryphon back that will be straight. I'll keep you posted on the economy after the tunes show up.
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07 FX4 SCAB, 4.56 Yukons, K&N 57 CAI, Flowmaster 40 SI/DO, Rhino lined, Westin grille and tail light guards, Kobalt 2500 truck box and the best mod of all.....a Gryphon!
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Sun, February 15th, 2009, 06:39 AM
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