Optimistic Overhead Observations
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Joined: Jan 2011
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From: Puget Sound
You know you need to know the what and why's about the Prius.
Now as far as the overhead "lie-O-meters" mine in my E99 is off by at least 15% around town but highway it more like 10% OFF. But I have actually gotten 20mpg out of it (hand calculated) straight highway at 62mph @ 2000rpm's "lie-O-meter" said I was getting 22.6mpg. But I have only be been able to go that slow once and I don't have the self control to that again! Now my hoopdee (Saturn SC1) doesn't have a lie-O-meter, no power windows and no cruise control. Stripped down to say the least. Honestly I have only wanted to hand calculate a few times over the last 5 yrs. Because the little car is so kind to me I don't care. But by hand calculating I get 36.4mpg and best 38mpg. But it is such a dog I am scared I am going to die trying to get on the highway on ramp.
Now as far as the overhead "lie-O-meters" mine in my E99 is off by at least 15% around town but highway it more like 10% OFF. But I have actually gotten 20mpg out of it (hand calculated) straight highway at 62mph @ 2000rpm's "lie-O-meter" said I was getting 22.6mpg. But I have only be been able to go that slow once and I don't have the self control to that again! Now my hoopdee (Saturn SC1) doesn't have a lie-O-meter, no power windows and no cruise control. Stripped down to say the least. Honestly I have only wanted to hand calculate a few times over the last 5 yrs. Because the little car is so kind to me I don't care. But by hand calculating I get 36.4mpg and best 38mpg. But it is such a dog I am scared I am going to die trying to get on the highway on ramp.
I have had the same experience with fuel economy on Stinky and the overhead at 65 MPH non-stop, but my numbers came out between 19.5 and 20.0, while the overhead was 10% optimistic. I don't do city driving with the diesel often, so I don't know how my overhead would perform in that scenario.
Elder User
Joined: Feb 2006
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From: Eastern Ohio
The meters can be accurite, I believe the MFG's make them a little on the high side.
My 98 Freightliner was never off more then 2% and usaully was dead on. I trusted it more than the fuel gauge when I was going to be cutting it close.
My 98 Freightliner was never off more then 2% and usaully was dead on. I trusted it more than the fuel gauge when I was going to be cutting it close.
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Joined: Jan 2011
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From: Puget Sound
My current tunes make the overhead read very close to what I was showing when the truck was stock... and I am nowhere near stock now. I am thinking about talking with Cody about what's involved to effect overhead accuracy, but I suspect its the Mass Fuel Desired map. There might be a way to get the overhead dialed in, without performance/economy taking a hit.As for the OTR truck... so much attention is focused on fuel, it doesn't surprise me that the manufacturer dialed that particular gauge real tight. I imagine that attention to detail also brings the price up a bit, but the Return On Investment is big enough to justify the added expense.
Cargo Master
Joined: Jan 2009
Posts: 2,800
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From: OKC, OK
My overhead is way off. Says 20 ish when I get 15-16. It was actually pretty accurate with the tunes that came with the truck. But that was probably just adjusting the pedal input and nothing with the timing or fuel map.
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Joined: Jan 2011
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From: Puget Sound
Sorry about being so cryptic on the tune. It was decided to release the tune within a few days, and I haven't checked back to verify if it's available now. I have a complete write-up on the tune and I'll be making vids soon (after the big push on Stinky), but I can't say more than that until I confirm it's out there for everybody.
Junior User
Joined: Jun 2013
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Yup. 
I've recorded virtually every mile and gallon in my TDI Bug and the average mileage over 9 years in mixed driving is 44.
Best I've done was a pure freeway drive that got 55mpg at 65mph, and worst I've done is a track day where I was WOT most of the time and got 34 mpg. I won't ever need a future Mega-BuckZooka blast to replace the batteries that are worth more than the car.
It has mods (chip, injectors, etc) that make it very fun to drive.
Umm, I also have a 7.3L (which I mention to stay on the forum's topic).
I've recorded virtually every mile and gallon in my TDI Bug and the average mileage over 9 years in mixed driving is 44.
Best I've done was a pure freeway drive that got 55mpg at 65mph, and worst I've done is a track day where I was WOT most of the time and got 34 mpg. I won't ever need a future Mega-BuckZooka blast to replace the batteries that are worth more than the car.
It has mods (chip, injectors, etc) that make it very fun to drive.
Umm, I also have a 7.3L (which I mention to stay on the forum's topic).
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Joined: Jan 2011
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From: Puget Sound
).This vehicle's not for modding, it's to get me to and from work without having a bad hair day - ever - like every Toyota I've owned since 1978. The trick is to dump them at about 200K. After that point, they grow needy - like a German diesel.
Oh... and I researched the battery thing before the purchase. The reputation was born out of the first generation of these cars (and lack of aftermarket batteries [LINK]). The second and third gen batteries are not an issue.
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Lead Driver
Joined: Sep 2005
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From: Norco,CA
Good luck on the 200K. I don't think you have a chance with that on this one. I like
Toyota resell but still have a bad taste of the one's in the 60's that couldn't keep trans in them and other problems. I have had lots of friends with them and know problems at all, and the resell is always good. These electric one have been having problems already.
Toyota resell but still have a bad taste of the one's in the 60's that couldn't keep trans in them and other problems. I have had lots of friends with them and know problems at all, and the resell is always good. These electric one have been having problems already.
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Joined: Jun 2013
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My wife has a Toyota we bought new in '04 and I think we're up to 5 or 6 factory recalls on it, including one where 20 miles after the "fix" it left her stranded beside the freeway.
Based on our experiences I'm not impressed by the so-called Toyota quality, but I do admit to being impressed by the way they do stand behind the vehicle and fix the problems, including one just last month that was fixed at no cost to us on a 9 year old, 104,000 mile vehicle. Still, I'd just as soon not have had the (bizarre) problem in the first place.
Back on topic: Umm, I really like my truck.
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Hotshot
Joined: Jan 2011
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From: Puget Sound
Truck.... Let's recap a bit.
That's without going into the self-inflicted wounds from modding. Here we go:
Incidentals:
So... when somebody days "Hey Tugly, you should have got a diesel daily driver and mod that bad boy up." My response would be less than affirmative.
- Lost the tranny
- Lost two injectors without warning
- Blew a plenum seal - install billet plenums.
- IPR died
- Water pump died
- Alternator died
- Power steering pump died
- Rear brake seized, all parts replaced
- Front brakes replaced
- ICP died
- EBP sensor died
- Exhaust leaks - new bellowed ups, baby's butt, and both manifolds.
That's without going into the self-inflicted wounds from modding. Here we go:
- Damaged turbo bands and boot bands
- Damaged cup (replace all 8)
- Reman injectors
- Swap injectors a few times
- New injectors
- Tighten injector bolts about 14-15 times
- Fuel and oil in coolant now, exhaust in coolant before doing cups.
- Tune, tune, tune, then swap tuners.
- 4" exhaust
- Drop tank 4 times before getting Hutch mod right
- New head unit with backup camera. Truck smacked by drunk driver - new backup camera again... and new (stronger) hitch receiver.
- New turbo
- T500
- DP F6
- Hydra
- Gauges
Incidentals:
- Windshield broke
- Canopy
- Tools for diesel
- AE
- Storage add-ons
- Bed liner
- Newer tailgate (old one was beat)
So... when somebody days "Hey Tugly, you should have got a diesel daily driver and mod that bad boy up." My response would be less than affirmative.
