Hypermiling the Chevy Tahoe 6.0L v8 40MPG! :O

[ksa8907]

I believe the engine must run at higher speeds even when not accelerating to run the trans fluid pump.

These engines don't have a lean burn, but the cam is special and allows LIVC, late intake valve closing.

[Vman455]

Originally Posted by Tahoe_Hybrid

I'll be replacing the air filter as well as it's clogged Just waiting on the part i need (the torx tool to open it)

Wait, wait, wait--you need a torx bit to open the engine air filter housing?

I'm having flashbacks to the Chrysler products I've owned, which used a mix of English and metric sizes, and you needed 5 million tools to do anything. Meanwhile, my last two cars--both Japanese--you can literally take apart in their entirety with 6 metric sockets, a Philips head screwdriver, and a pair of needlenose pliers.

[Tahoe_Hybrid]

[QUOTE=ksa8907;599735]I believe the engine must run at higher speeds even when not accelerating to run the trans fluid pump.

no it has a Aux transmission pump a AUX water pump as well
It falls back to mild hybrid if a failure occurred...



I think I found a Active Fuel Management mpg exploit... hack (aka THE hidden "3rd mode"). 2̶ ̶M̶o̶d̶e̶
.


But I can get Regenration.. to kick in and able to accelerate in 4 banger mode the RPM drops to 1,000 RPM in 4 banger ( it vibrates a little though since it's technically speaking it should not be at 1k rpm) in v4 mode .. the minimum RPM for V4 is 1200rpm for it to be stable or it vibrates slightly

this exploit

could be quite promising...AFM exploit



the v4 a (AFM exploit) you can even force a regeneration event while forcing it to accelerate on a down hill while still in v4(important to have more POWER(electrical power) & speed when you get to the next hill to maximize MPG)..


other wise if its normal regeneration and you take foot off the gas, you might I MEAN might gain a few mph in speed...




I suspect this AFM exploit might work great hahah...


Came in at 24MPG With A/C on medium fan. set to 60F..
Computer reading 24.1MPG average.


EPA BOOST huge claims i should have lost 25% OR more fuel economy...

4.00%- total lost at the A/C @ 60F medium fan speed.. it was 85F outside and 90-95F inside (Black SUV)

or if by EPA claims 18.5 mpg which is 25% loss

[Tahoe_Hybrid]

Originally Posted by Vman455

Wait, wait, wait--you need a torx bit to open the engine air filter housing?

I'm having flashbacks to the Chrysler products I've owned, which used a mix of English and metric sizes, and you needed 5 million tools to do anything. Meanwhile, my last two cars--both Japanese--you can literally take apart in their entirety with 6 metric sockets, a Philips head screwdriver, and a pair of needlenose pliers.

Yes Security so people don't steal your "used" air filter

[Daschicken]

Originally Posted by Tahoe_Hybrid

Yes Security so people don't steal your "used" air filter

Probably closer to:

Security, so owners aren’t tempted to work on their own cars.

35 mpg sounds a little optimistic, but may be possible if you drive slow enough. I did a 5000 mile trip in my V6 accord going usually 65 +-5. I got 41.45 MPG overall.

[2000mc]

The new body style 99 trucks didn’t have torx, I don’t know how long they went before switching but I think they were in all the full size for a couple years before the change. Originally they had a combination flat blade and #3 Phillips. Problem was the 2 at the lower end, kinda hard to reach and being angled, didn’t take long before the heads were rounded off bad. So what do you do? you have to push down hard as you turn. Doing this helped a lot of people over tighten those screws and split the air box lid at the screw. Gm knew they were selling too many air box lids, and the torx was part of the redesign. They didn’t just start out being dicks about it, they just started out with one of the most often removed fasteners being hard to access.

[mpg_numbers_guy]

Originally Posted by Vman455

Meanwhile, my last two cars--both Japanese--you can literally take apart in their entirety with 6 metric sockets, a Philips head screwdriver, and a pair of needlenose pliers.

My Insight is the same way, except that half the screws on the hybrid battery panel are torx, presumably to discourage the average joe from accessing it readily.

[Tahoe_Hybrid]

Originally Posted by 2000mc

The new body style 99 trucks didn’t have torx, I don’t know how long they went before switching but I think they were in all the full size for a couple years before the change. Originally they had a combination flat blade and #3 Phillips. Problem was the 2 at the lower end, kinda hard to reach and being angled, didn’t take long before the heads were rounded off bad. So what do you do? you have to push down hard as you turn. Doing this helped a lot of people over tighten those screws and split the air box lid at the screw. Gm knew they were selling too many air box lids, and the torx was part of the redesign. They didn’t just start out being dicks about it, they just started out with one of the most often removed fasteners being hard to access.

well the GM cars used clips to hold it on and it did just fine..

the HV battery uses standard bolts on it

[Vman455]

Originally Posted by 2000mc

They didn’t just start out being dicks about it, they just started out with one of the most often removed fasteners being hard to access.

Sounds like the problem is, if they had designed it thoughtfully in the first place they wouldn't have had to deal with the broken fastener issues.

[Tahoe_Hybrid]

Switching over from chevron 91 octane to Shell V-Power 91 octane

They claim to have a new formulation
we will see if it "helps or hurts MPG"