• Steel Soldiers now has a few new forums, read more about it at: New Munitions Forums!

  • Microsoft MSN, Live, Hotmail, Outlook email users may not be receiving emails. We are working to resolve this issue. Please add support@steelsoldiers.com to your trusted contacts.

ECO Hubs Who needs 3:07 gears?

R

Ronmar

Well-known member
4,250
8,099
113
Location
Port angeles wa
Yea the manual-auto lockup programming might help, you hold it down into 2nd, or even use it in 1st gear for a little more effective hill decent mode. Just need a reliable way to release it before you take the engine below idle RPM…
 
G

GeneralDisorder

Well-known member
Steel Soldiers Supporter
2,423
5,954
113
Location
Portland, OR
Must be a difference with the older controllers. I don't experience exhaust brake issues at all. There's actually a really steep grade near my house that is between me a groceries many times. Coming down that hill I might have to use the brakes for a couple seconds once to bring the speeds down to where I want it then the exhaust brake and trans gear keep it from accelerating.

I'll have to pay closer attention to what speed it disengages at as I'm slowing down.

If you are talking about crawling speeds only then using the brakes isn't causing that much wear at those speeds so it doesn't overly concern me.
 
R

Ronmar

Well-known member
4,250
8,099
113
Location
Port angeles wa
I think it was lost chain who put up a video showing it hold lockup/ex brake down into second gear. where it drops out in 2nd will probably be a factor of how fast you are decelerating. I shot a crappy video of my scan tool looking at the F/lockup solenoid and mine currently drops out right with the shift to 2nd, but I don’t have any weight on yet, so it slows pretty fast when I roll off the throttle even without the ex brake…
 
G

GeneralDisorder

Well-known member
Steel Soldiers Supporter
2,423
5,954
113
Location
Portland, OR
aw113sgte said:
Fuel economy update (with eco hubs)
2007 A1R m1096 with 20ft shipping container.
30,400 lbs
Speed 60-65mph
Stock ECM map
5.82 mpg
Click to expand...
Try 50-55 instead. You're junk is big and heavy. Congrats on your sizeable gear :sneaky:

Tire pressure? I run the M1088 settings so 81 psi.

Guessing at that weight the best it will get under ideal conditions is probably around 8 or just under. 7.8 to 8.2 would be believable for that combo if all the stars align. But without the hubs you would probably be even lower than your most recent calculations.

From my experience it does seem that the MTV takes a hit of 1-2 MPG or so from the extra axle gear out back. The 4x4 trucks do the best with some guys reporting 11-12. I myself was around 10.2 but I should update that test. It's been a while.
 
A

aw113sgte

Well-known member
Steel Soldiers Supporter
863
1,365
93
Location
La Crosse, WI
GeneralDisorder said:
Try 50-55 instead. You're junk is big and heavy. Congrats on your sizeable gear :sneaky:

Tire pressure? I run the M1088 settings so 81 psi.

Guessing at that weight the best it will get under ideal conditions is probably around 8 or just under. 7.8 to 8.2 would be believable for that combo if all the stars align. But without the hubs you would probably be even lower than your most recent calculations.

From my experience it does seem that the MTV takes a hit of 1-2 MPG or so from the extra axle gear out back. The 4x4 trucks do the best with some guys reporting 11-12. I myself was around 10.2 but I should update that test. It's been a while.
Click to expand...
But I don't want to go slower! I don't really care about the mpg (too much). Running in the 80s psi, I forget the exact value (I think I copied the 1088 values). It cruises nicely at 60-65, well 70-75 too but I "feel" like going that speed may be getting into the unsafe category. We aren't in a rush anyways.

Of note, that mid axle is always about 15f warmer than the front and rear diffs. I assume some extra energy put into that torque divider. May be where some of that mpg go.
 
Last edited:
A

aw113sgte

Well-known member
Steel Soldiers Supporter
863
1,365
93
Location
La Crosse, WI
Ronmar said:
Yea thats a lotta weight… have you taken individual axle weights? Balance too far outta wack will really show tire wear running a single CTIS pressure across all 3 axles…

”Your junk is big and heavy” Waaaay TMI…:)
Click to expand...
Junk is big and heavy....if only, my wife says otherwise.

Nope I haven't. Best info I have is the little tire whiskers on the new tires, they all wore off very evenly. When going low pressure all the tires bulge out the same - best as I can eyeball.
 
Last edited:
Gunny 0369

Gunny 0369

Marine Gunnery Sergeant
Steel Soldiers Supporter
293
659
93
Location
North Carolina
GeneralDisorder said:
Try 50-55 instead. You're junk is big and heavy. Congrats on your sizeable gear :sneaky:

Tire pressure? I run the M1088 settings so 81 psi.

Guessing at that weight the best it will get under ideal conditions is probably around 8 or just under. 7.8 to 8.2 would be believable for that combo if all the stars align. But without the hubs you would probably be even lower than your most recent calculations.

From my experience it does seem that the MTV takes a hit of 1-2 MPG or so from the extra axle gear out back. The 4x4 trucks do the best with some guys reporting 11-12. I myself was around 10.2 but I should update that test. It's been a while.
Click to expand...
:LOL:
 
Gunny 0369

Gunny 0369

Marine Gunnery Sergeant
Steel Soldiers Supporter
293
659
93
Location
North Carolina
Keith Knight said:
Ok, almost 6,000 miles running echo hubs with original gears, 3126 engine with a 330 hp program. Note: I weigh 27,800 lbs
Oh and I had previously driven over 25,000 miles with the 3:07/ high speed gears and NO echo hubs.
Update…..
Love the noise reduction
Love knowing everything is spinning half the RPM’s

Hate that the exhaust braking only slows me down to 20 mph before they disengage. They were effective down to less than 10 mph before. Which means I’m using the brakes way way way more. Also while going down hill, I mean down mountains with single track dirt forest roads I have to manually shift the transmission into 1st gear to keep from riding the brakes constantly to maintain a nice controllable speed.
Also while going down 10% grade mountain roads on paved roads the exhaust brakes don’t keep me in a safe speed like they did before with the echo hubs.

FUEL Mileage everyone wants to know.
With 3:07/high speed gears I got over 25,000 miles averaging 6.5
With original gears and echo hubs I’m getting about 8-8.5 mpg. Not what I hoped for but it is what it is. It’s better! Also my max speed is 60 mph. I personally aim for 50-55 mph in 6th gear which is the optimal mpg while monitoring the instant MPG according to the ECM. I’m able to live monitor it. Oh and forget ever using 7th gear….got to 80mph and it still never shifted to 7th gear.

Hate that it starts from a stop in 2nd gear. Makes for a sluggish start.

Which brings me to my big question? Any possible way to reprogram the transmission to use 1st gear in all situations? Different ECU from a different vehicle? Just spit balling….
Click to expand...
Thanks Keith for the real world testing, good info.
missed u in the midwest!
 
GCecchetto

GCecchetto

Well-known member
Steel Soldiers Supporter
270
270
63
Location
Woodside CA
Any of you folks running 14R20's with ECO hubs? Contemplating switching over, but a little concerned about further raising the gearing. Also curios about longevity and reliability of the Goodyear ORD's for those with experience with them.
 
AKPacker

AKPacker

Active member
Steel Soldiers Supporter
89
183
33
Location
Anchorage, AK
GCecchetto said:
Any of you folks running 14R20's with ECO hubs? Contemplating switching over, but a little concerned about further raising the gearing. Also curios about longevity and reliability of the Goodyear ORD's for those with experience with them.
Click to expand...
I've been running that combo for ~7000 miles now and have been fairly happy with it. I only drove my truck maybe 5 miles with the original tires and hubs so I can tell you my experience with the Ecohubs/14.00R20s, but don't have a good basis for a comparison with the stock tire size.

With the original 275 hp tune it drove great for the most part and the only time I was left wanting was on long steep uphill grades where it would shed a ton of speed and struggle a bit, it is significantly better now with 370 hp. Acceleration around town and in traffic was fine but not inspiring, also much improved with 370 hp. I haven't done any low speed crawling yet so I can't comment on how that is affected by the taller tires.

The speedometer required a 5.6% adjustment to line up with GPS speed: (62618ppm/1.056)/2=29649ppm with Ecohubs. Fuel mileage has been great for what it is, I average around 10mpg. They seem to be wearing well, and at this rate I'd expect to get 30000+ miles out of them.

Minor issues:
*The spare doesn't fit well in the carrier as can be seen in the photo below. The crane arm will eventually need to be extended 3" to 4" for the tire to fit flush with the side of the box.
*They are a bear to balance, although that isn't unique to these tires and is likely also due to wonky steel wheels.
*They are quite loud at highway speeds, although again that is not unique to these tires. Tire noise is now the loudest sound in the cab since I've quieted down other parts of the truck with insulation and the Ecohubs.
*The Goodyear OTR tires sold by ColonyTire on Ebay are blemished/factory seconds with tread repairs. When I bought my set they weren't advertised as such, so I had to negotiate with them to get some money back. It looks like they are properly advertised now. The repairs do seem to be holding up ok so far.


1000014783.jpg
 
You must log in or register to reply here.
113,105members
166,481threads
2,344,537posts
2,172online users
Top
✖
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website like our supporting vendors. Their ads help keep Steel Soldiers going. Please consider disabling your ad blockers for the site. Thanks!

I've Disabled AdBlock
No Thanks