RPM's at 80 MPH
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I think we're on to something about the 04.5 what with them changing shif logic etc... they could have changed the CC programming as well.
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FWIW - yesterday on road trip out of town I had wide open desert hwy and was able to do several runs to 100... CC works to 90mph and thats it. If I accelerate with foot to 100 then set cc it decelerates to 90 then stays... if
I accelerate with thumb control, it gets to 90 and wont go past... So CC works fine at all speeds to 90mph.
Also, after doing several hard 0-70 runs (data-logging different stuff) and very spirited street driving for 40-50 miles, then road trip (287 miles) avg 70mph, my avg mpg was just under 19... with 3.3 when I drove daily 50/50 street & hwy I usually got 18-19mpg... with the 3.7 I hardly drive the car and its mostly spirited street with some fwy; normally get 15-16mpg... so the 18.88 that I got on this trip was pretty good (without the super aggressive street driving prior, I could have got 19-20).
I case anyone cares
I accelerate with thumb control, it gets to 90 and wont go past... So CC works fine at all speeds to 90mph.
Also, after doing several hard 0-70 runs (data-logging different stuff) and very spirited street driving for 40-50 miles, then road trip (287 miles) avg 70mph, my avg mpg was just under 19... with 3.3 when I drove daily 50/50 street & hwy I usually got 18-19mpg... with the 3.7 I hardly drive the car and its mostly spirited street with some fwy; normally get 15-16mpg... so the 18.88 that I got on this trip was pretty good (without the super aggressive street driving prior, I could have got 19-20).
I case anyone cares
#222
Also, after doing several hard 0-70 runs (data-logging different stuff) and very spirited street driving for 40-50 miles, then road trip (287 miles) avg 70mph, my avg mpg was just under 19... with 3.3 when I drove daily 50/50 street & hwy I usually got 18-19mpg... with the 3.7 I hardly drive the car and its mostly spirited street with some fwy; normally get 15-16mpg... so the 18.88 that I got on this trip was pretty good (without the super aggressive street driving prior, I could have got 19-20).
I case anyone cares
I case anyone cares
#223
What was your cruise speed? Was it hilly? Are your 19s w/tires a lot heavier than stock? That MPG seems really low, even 19/20 would be low, assuming you're going 70-75mph. However, you do have a lot of mods and maybe the cams could be influencing the mpg a bit. Another guess would be the higher rpms in 5th with the 3.7 gears at highway speeds may actually be putting the ECU outside it's economy mode which I believe is 2900rpms or lower.
Avg speed on road trip was 70... front tires @ 35psi, rear 33... no hills or switchbacks... current wheels & tires are very close to weight of OEM 17" setup. I previously tested mpg with 3.7 to 3.3 its maybe 1mpg less... but I do so much spririted street driving in performance ECU map that combined witht he 3.7 my mpg is normally really, really low.
On my way home I will top off tank before I leave and calculate the actual fwy mpg (I'm guessing it will be nearly 20, which is as good as this car has ever gotten when driven daily).
#225
I think part of the reason you get such bad gas mileage is because California gas SUCKS NUTS. When I had my BMW I remember getting about 3 MPG less when I lived in Cali then I got here in UT.
When I have driven (3.3 FD) between UT and PHX I get 25-29 MPG at about 80 MPH average. I expect that the same results could be achieved with the the 3.5 just at around 75 MPH.
When I have driven (3.3 FD) between UT and PHX I get 25-29 MPG at about 80 MPH average. I expect that the same results could be achieved with the the 3.5 just at around 75 MPH.