Latest MPG

[JackDodge]

The first one, showing 33 MPG is achievable under good conditions on a constant basis and the second one, 44 MPG was achieved through hypermiling under ideal conditions (with the exception of the temperature) and can't be maintained but I as able to keep it for quite a while today. Glad I had the camera because few would believe it if I said 'oh yeah, I've gotten 44 with the HiHy'.

[F8L]

How many miles were used to achieve both firgures Jack?

When you sau hypermiling do you include P&G or just basic stealth mode and conciencious driving?

[JackDodge]

<div class='quotetop'>QUOTE(F8L @ Nov 24 2007, 04:11 PM) [snapback]543667[/snapback]</div>

How many miles were used to achieve both firgures Jack?

When you sau hypermiling do you include P&G or just basic stealth mode and conciencious driving?
[/b]

I don't use pulse and glide much. Basically, especially with the hills around here, I drive the car the way I ride a bicycle. That is, accelerate somewhat before hitting the hill so that I can coast up the hill and coast down or get in to EV mode on the way down. Use as little energy as possible. I also avoid higher speed roads, preferring 35 to 40 if possible. I shut off the fan (no heat) to maximize economy. That's why it's not possible to maintain 44 during the winter but I expect, now, to do high thirties to low 40s in the summer but we'll have to see about that.

[F8L]

<div class='quotetop'>QUOTE(JackDodge @ Nov 24 2007, 01:27 PM) [snapback]543673[/snapback]</div>

I don't use pulse and glide much. Basically, especially with the hills around here, I drive the car the way I ride a bicycle. That is, accelerate somewhat before hitting the hill so that I can coast up the hill and coast down or get in to EV mode on the way down. Use as little energy as possible. I also avoid higher speed roads, preferring 35 to 40 if possible. I shut off the fan (no heat) to maximize economy. That's why it's not possible to maintain 44 during the winter but I expect, now, to do high thirties to low 40s in the summer but we'll have to see about that.
[/b]

That is pretty much how I drive with the exception of the neihborhood streets near my house. In that area I will use ICE or battery power to get up to 30mph then glide to the next stop sign. So I'm not sure if that is considered pulse and glide really but it's close. lol I am stuck driving the speed limit on the other roadways though so my usual is 55mph to school or 65-70mph on the 150mile commute to work and back.

Good job man.

[hill]

So ... what is the best anyone has done on a single tank of gas ... mpg wise, and range of miles-wise, in the hihy. I'm curious, because one of these days, I'll get a chance to set a high goal in the 400h. Gotta know what I'm up against.

[rudywalker101]

My best tank so far is 503 mi - but current tank is on pace to beat that by 10 - 15%, with an outside chance of 600 mi. Current tank is at 35.6 mpg (display)/34.7 est. actual.

Using EBH and radiator block and car chip to monitor coolant temps and % stealth mode. Best performance on a morning commute (17.5 mi/40 min) w/ EBH has been 50% stealth, which works out to 42.4 mpg. The first 25 min of the drive are used to fully warm up the ICE, and the final 15 min in extended S3/S4 modes. My routes are rolling hills (charge uphill/stealth downhill) with mostly flat terrain at end of commutes.

I'd have never thought it possible to get > 40 mpg from HiHy either, until I started reading posts on boards like this, trying and learning.

[hill]

In the 400h I find that if I creep up the hills (providing traffic allows) at sub-30mph speeds, the regen / stealth down the other side gives a boost. I'm thinking this is so because charging up hills simply means you have to push a whole lot more air mass out of the way.

[efusco]

Originally Posted by rudywalker101

My best tank so far is 503 mi - but current tank is on pace to beat that by 10 - 15%, with an outside chance of 600 mi. Current tank is at 35.6 mpg (display)/34.7 est. actual.

Using EBH and radiator block and car chip to monitor coolant temps and % stealth mode. Best performance on a morning commute (17.5 mi/40 min) w/ EBH has been 50% stealth, which works out to 42.4 mpg. The first 25 min of the drive are used to fully warm up the ICE, and the final 15 min in extended S3/S4 modes. My routes are rolling hills (charge uphill/stealth downhill) with mostly flat terrain at end of commutes.

I'd have never thought it possible to get > 40 mpg from HiHy either, until I started reading posts on boards like this, trying and learning.

Do you have any photos of your grill blocking or can you give a good description of how you undertook it? The EBH clearly makes a big difference for my wife's very short commute, the ICE takes forever, compared to the Prius, to warm up fully without it. I'm convinced grill blocking would help, too, but can't see an easy way to go about it.

[JackDodge]

Originally Posted by rudywalker101

My best tank so far is 503 mi - but current tank is on pace to beat that by 10 - 15%, with an outside chance of 600 mi. Current tank is at 35.6 mpg (display)/34.7 est. actual.

Using EBH and radiator block and car chip to monitor coolant temps and % stealth mode. Best performance on a morning commute (17.5 mi/40 min) w/ EBH has been 50% stealth, which works out to 42.4 mpg. The first 25 min of the drive are used to fully warm up the ICE, and the final 15 min in extended S3/S4 modes. My routes are rolling hills (charge uphill/stealth downhill) with mostly flat terrain at end of commutes.

I'd have never thought it possible to get > 40 mpg from HiHy either, until I started reading posts on boards like this, trying and learning.

As with my Prius, I don't run the tank down to empty so the most miles out of a tank has not been a goal for me with the HiHy. Currently, without trying very hard, I'm getting 30 mpg and I don't have the engine block heater yet. This summer is when I hope to get it in to the mid to upper thirties. Comforting to know that you have hills too.

[rudywalker101]

Sorry for the delay in responding. Been on the road taking our youngest on college visits. To answer your questions:

I have a three-layer approach to blocking the radiator:

a) Pipe insulation below the grille, similar to those used on Prius (see pic)
b) A 8.5" x 7.5" mouse pad on the LHS and RHS of the grille, secured with cable ties, covering almost 60%.
c) Reflective foil insulation (Home Depot part # ST16025), behind the main grille, and in front of the radiator. I had a bit leftover from insulating my hot water heater. I cut two sections, rolled it into a narrow cylinder, inserted from below, and then unwound the cylinder to lie flat against the radiator. I probably have 95% of the radiator blocked and use a Davis Car chip to record coolant temps. Additional insulation was taped to the bottom of the hood. My max temps have been between 196 and 199 F when OATs exceeded 80 F.

EBH use with the radiator block appears to have the biggest impact on average MPG in the first 7 - 8 min of my morning drive, as much as 50% better (34.5 v 23). By the end of my 35 - 40 min drive, the advantage drops to 32% (45.8 v 34.6).

My best tank (ending 5 days ago) was 601.8 mi and 35.2 mpg calc., where I was using EBH 3 hr every day for 12 days.