New Prius - "Super Highway Mode" Technique (SHM).

philmcneal · #**101** 05-19-2008, 03:50 AM

the super highway mode does work but i do it in another fashion... but it netted me 4 - 5 min bars of 2.5L/100km segments (92 mpg US) but i basically pulse towards a target and then WS behind him till he gets away from me pretty good, but then I start pulsing in a way where I can see my speed increase single digits (km/h) but at the same time using the target in front of me to eat up the areo load. So basically overwork the engine but let the guy in front of you absorb most of the damage! Rise and repeat my speed ranges would be 75 km/h to 95 km/h any

three digits hurt

bhchan · #**102** 05-21-2008, 07:50 PM

can any of this be done without access to aftermarket hardware (like an SG-2)?

diamondlarry · #**103** 05-21-2008, 08:30 PM

It could be done without a Scanguage but it would be very difficult. You would have to back the throttle off until you saw the instantaneous jump into the high 70's or lower 80's. This would be from 50-55mph down as low as 45mph.

philmcneal · #**104** 05-22-2008, 12:30 AM

i find its easy to peg it at 94 mpg us (2.5L or just 1/4 of the bar for us Canadians being color filled) but then my speed begins to drop (or bleed as we like to call it) rapidly, so between high 70's and lower 80's is around 3.1 to 2.9 Liters / 100km so that is pretty hard to peg at since the screen updates pretty slowly without aftermarket hardware.

CaliberMan71 · #**105** 05-27-2008, 04:52 PM

Is the IGN 14 just for the Prius, or can it work for my 07 2.0l Dodge Caliber SXT with CVT?

Dan · #**106** 05-27-2008, 05:01 PM

Quote:

Originally Posted by CaliberMan71

Is the IGN 14 just for the Prius, or can it work for my 07 2.0l Dodge Caliber SXT with CVT?

If it works on the Dodge, its just luck. We suspect we hit an intentional efficient zone on slow decels.

Quote:

Originally Posted by bhchan

can any of this be done without access to aftermarket hardware (like an SG-2)?

Yes. Set to Castle display ("CONSUMPTION" screen). Get up to cruising speed (anywhere between 50 and 65 mph). Now Pulse up with the far right "bar" bouncing a little below or a little above 50. When your ready to glide, glide with the far right "bar" bouncing between 75 and 100.

That should be it for the most part

11011011

2way · #**107** 05-27-2008, 08:35 PM

Quote:

Originally Posted by Dan

We suspect we hit an intentional efficient zone on slow decels.

Dan, I really suspect, as I said earlier, you are hitting the EGR mode of the VVT system. There is no EGR valve. The VVT purposely overlaps Intake & Exhaust valves on partial load to provide an EGR action and reduce pumping losses. Since the exhaust valves do not close until the intake valves have been open for a while, some of the exhaust gases are recirculated back into the cylinder at the same time as the new fuel / air mix is injected. As part of the fuel / air mix is replaced by exhaust gases, less fuel is needed. Because the exhaust gas is comprised of mostly non-combustible gas, such as CO2, the engine runs properly at the leaner fuel / air mixture without failing to combust.

I see similiar rises in MPG backing off TPS by one or two from a cruising speed on my 2ZZ-GE. I haven't watched IGN when I do it, though. So, I can't nail it to a specific IGN reading. Presumably, if you have a VVT engine, you can find similar results.

xcel · #**108** 05-27-2008, 08:40 PM

Hi 2way:

___I have never seen anything like SHM in the Corolla and I doubt we ever will

The one item that is different about the SHM technique is the 1,208 – 1,248 RPM the Prius is turning over at 50 + mph. It would take an extremely tall CVT and nothing can come close where the Corolla’s or Yaris’ Auto’s or Sticks are concerned.

___Good Luck

___Wayne

TheForce · #**109** 05-27-2008, 09:22 PM

So am I correct that the TPS is the throttle position in 0-100 percent? The 18 number is %18?

xcel · #**110** 05-27-2008, 09:44 PM

Hi Jay:

___Funny that I just got done driving a Prius for over 1,700 miles and I do not know the TPS range for one

Go out to your Prius with it booted but not in the ready state and look at the TPS output on your SG-II. It is probably around 14 the bottom and maybe 30 on the top? A Fuel cut setting at 15 leads me to that conclusion? The goofy thing is flooring it does not give a WOT output if you were force charging as I was in that condition 4 or 5 times before the launch to NY City. I suppose if you boot it into a non-ready state and put your foot to the floor the high end might be revealed but I would simply be guessing at best.

___Anyway, 18 via TPS is a bit more than 18% but the top of the range is much less than 100.

___Good Luck

___Wayne