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General Diesel Tech Farm equipment, Medium Duty, Big Rigs, and other General discussion can be found in here. |
10-21-2017, 03:07 PM
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#13741
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Name: allan5oh
Title: Too Much Time
Status: Not Here
Join Date: Oct 2012
Member`s Gallery
Posts: 1,106
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Driver can only do so much. If he's driving at a reasonable speed and not idling there won't be huge gains there. The cummins white paper says driver can make *up to* 35% difference.
__________________
All of your BSFCs are belong to me
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10-21-2017, 03:08 PM
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#13742
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Name: BRE
Title: Too Much Time
Status: Not Here
Join Date: May 2010
Location: Southwest MO
Member`s Gallery
Posts: 12,705
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Quote:
Originally Posted by Leiffi
Yes, dont be smooth, just floor it, turbocharger is there to make it more efficient so use it.
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Ahaha!! Yea phuckin right. It drops down into the 4’s if you’re mean to it.
Sent from my iPhone using Tapatalk Pro
__________________
Rick
07 Dodge 3500 - Tow mirrors, silencer ring MIA, Spectra air filter.
Quote:
Originally Posted by jfaulkner
There really is nothing better than OEM. That goes for anything from turbos to boobs.
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RIP Dex KCCO
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10-22-2017, 01:40 AM
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#13743
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Name: Leiffi
Title: Too Much Time
Status: Not Here
Join Date: Jan 2013
Member`s Gallery
Posts: 1,381
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Quote:
Originally Posted by BRE
Ahaha!! Yea phuckin right. It drops down into the 4’s if you’re mean to it.
Sent from my iPhone using Tapatalk Pro
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No need to rev the hell out of it, keep rpms low but floor it. Skip gears, every shift spends fuel. 18 speeds are a waste, 6 is mostly needed to get up to speed.
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10-22-2017, 06:30 AM
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#13744
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Name: Leiffi
Title: Too Much Time
Status: Not Here
Join Date: Jan 2013
Member`s Gallery
Posts: 1,381
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First time in Finland and maybe in Europe, loaded truck drag racing. This was the final of 44 tons class.
Scania vs Volvo - YouTube
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10-22-2017, 08:39 AM
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#13745
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Name: Rig Wrench
Title: Wannabe Tech
Status: Not Here
Join Date: Jan 2016
Location: In the ditch
Member`s Gallery
Posts: 1,045
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Quote:
Originally Posted by BRE
It’s supposed to have a good tune in it but either I’m expecting too much, or something.
Mind you, it’ll stay cool if you keep it cobbed for the most part, but if you try and baby it like I do, it seems it’s a battle sometimes.
Best I can do with it, is 5.3-5.4 on my fuel.
Sent from my iPhone using Tapatalk Pro
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I'd be interested to see what flash it has in it, fls/fts ect. Proper overhead and such. What gear ratio you runnin?
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10-22-2017, 08:47 AM
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#13746
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Name: Rig Wrench
Title: Wannabe Tech
Status: Not Here
Join Date: Jan 2016
Location: In the ditch
Member`s Gallery
Posts: 1,045
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Quote:
Originally Posted by Leiffi
First time in Finland and maybe in Europe, loaded truck drag racing. This was the final of 44 tons class.
Scania vs Volvo - YouTube
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Cool stuff. What engine/transmission combo is in the Volvo? It seems like over the pond your Volvo is quite different than the Volvo we have here.
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10-22-2017, 09:13 AM
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#13747
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Name: Leiffi
Title: Too Much Time
Status: Not Here
Join Date: Jan 2013
Member`s Gallery
Posts: 1,381
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Quote:
Originally Posted by Rig Wrench
Cool stuff. What engine/transmission combo is in the Volvo? It seems like over the pond your Volvo is quite different than the Volvo we have here.
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D16D Euro3 and 14 speed Volvo box. Quite slow and heavy to shift. Cab has same components with US Volvo but rest of the truck is quite different. Drive axle is Meritor, Volvo sold their axle manufacturing to Meritor some years ago.
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10-22-2017, 11:17 AM
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#13748
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Name: BRE
Title: Too Much Time
Status: Not Here
Join Date: May 2010
Location: Southwest MO
Member`s Gallery
Posts: 12,705
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Truckers, lets see your rigs!
Quote:
Originally Posted by Rig Wrench
I'd be interested to see what flash it has in it, fls/fts ect. Proper overhead and such. What gear ratio you runnin?
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3:55’s with lp 24’s.
I’m curious to know what tune is in it as well.
Would you mind explaining to me again what the fls/fts numbers correspond with? I forget exactly, and I like to learn.
As for the every shift spending fuel comment, I really hope you don’t think I shift every single gear possible. I never split the bottom side, and usually only split 3 shifts on the top side but that depends on the terrain and such.
Sent from my iPhone using Tapatalk Pro
__________________
Rick
07 Dodge 3500 - Tow mirrors, silencer ring MIA, Spectra air filter.
Quote:
Originally Posted by jfaulkner
There really is nothing better than OEM. That goes for anything from turbos to boobs.
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RIP Dex KCCO
Last edited by BRE; 10-22-2017 at 11:18 AM.
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10-22-2017, 12:17 PM
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#13749
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Name: Mr.T
Title: DPF's are gay
Status: Not Here
Join Date: Dec 2009
Location: Rexburg, Idaho
Member`s Gallery
Posts: 8,030
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Quote:
Originally Posted by BRE
So you’re saying I’m the reason it’s getting ****ty fuel mileage?
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not necessarily. i do think you have a crappy tune though, and you could always benefit from a more efficient charger
__________________
2019 L5P, missing some stuff that makes it quiet.
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10-22-2017, 08:12 PM
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#13750
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Name: Rig Wrench
Title: Wannabe Tech
Status: Not Here
Join Date: Jan 2016
Location: In the ditch
Member`s Gallery
Posts: 1,045
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Quote:
Originally Posted by BRE
3:55’s with lp 24’s.
I’m curious to know what tune is in it as well.
Would you mind explaining to me again what the fls/fts numbers correspond with? I forget exactly, and I like to learn.
As for the every shift spending fuel comment, I really hope you don’t think I shift every single gear possible. I never split the bottom side, and usually only split 3 shifts on the top side but that depends on the terrain and such.
Sent from my iPhone using Tapatalk Pro
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Load and tq settings. It matters though what calibration is in the truck. Some numbers work good on most engines. Others will lose power, some makes huge difference. A lot of factors.
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10-22-2017, 08:31 PM
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#13751
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Name: biggy238
Title: Too Much Time
Status:
Here
Join Date: Aug 2008
Location: Just North of Wrong
Member`s Gallery
Posts: 10,868
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I hate fls and fts. Even my excellent trainer couldn't explain it well.
It is left over terminology from the governor structure of CAT mechanical fuel systems. One (spring) limits full torque and the other limits full load.
Two of us in the shop were told flat out that FLS and FTS are irrelevant for any flash file created post 2007. I think this is interesting because 1) you still have to enter it 2) you can feel a seat of the pants change.
Only our PAR dyno guys are entrusted with what the numbers actually do. You can't just stick a number in and know it will increase power. (same with hot codes, but that doesn't stop people)
Sent from my XT1575 using Tapatalk
__________________
Check out @bdmaximusworx
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 6.4L cummins Swapped
Insta @trash.panda250
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10-22-2017, 08:39 PM
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#13752
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Name: BRE
Title: Too Much Time
Status: Not Here
Join Date: May 2010
Location: Southwest MO
Member`s Gallery
Posts: 12,705
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Well... I don’t have the things to check it.
Sent from my iPhone using Tapatalk Pro
__________________
Rick
07 Dodge 3500 - Tow mirrors, silencer ring MIA, Spectra air filter.
Quote:
Originally Posted by jfaulkner
There really is nothing better than OEM. That goes for anything from turbos to boobs.
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RIP Dex KCCO
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10-23-2017, 01:03 AM
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#13753
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Name: chevota84
Title: Too Much Time
Status: Not Here
Join Date: Jul 2009
Location: Prineville, OR
Member`s Gallery
Posts: 4,926
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I could see going soft getting up to speed, but on a hill let it eat. Peak power is peak efficiency for fuel burned vs hp, if you're constantly under the curve it's going to lose efficiency. This is a 2ws with hill Billy "tuning" and I beat the other truck doing the same work by .4-.5 and I'm 8k heavier, 96k vs 88k. His is a stock 455 5ek I think. The only time I ran long distance it got 6.8 at 70k with a stwpdeck and running 70-75 across the country.
Sent from my SM-G930V using Tapatalk
__________________
99 Dodge 2500 with stuff
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10-23-2017, 03:22 AM
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#13754
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Name: Leiffi
Title: Too Much Time
Status: Not Here
Join Date: Jan 2013
Member`s Gallery
Posts: 1,381
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Quote:
Originally Posted by chevota84
I could see going soft getting up to speed, but on a hill let it eat. Peak power is peak efficiency for fuel burned vs hp, if you're constantly under the curve it's going to lose efficiency. This is a 2ws with hill Billy "tuning" and I beat the other truck doing the same work by .4-.5 and I'm 8k heavier, 96k vs 88k. His is a stock 455 5ek I think. The only time I ran long distance it got 6.8 at 70k with a stwpdeck and running 70-75 across the country.
Sent from my SM-G930V using Tapatalk
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Peak torque is peak efficiency.
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10-23-2017, 05:37 AM
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#13755
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Name: biggy238
Title: Too Much Time
Status:
Here
Join Date: Aug 2008
Location: Just North of Wrong
Member`s Gallery
Posts: 10,868
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CAT designed the engines to run at 1300rpm, full throttle at any speed lower than the top holes. Climb a little past peak, row a gear.
I always run the ones I drive up to 1500
Sent from my XT1575 using Tapatalk
__________________
Check out @bdmaximusworx
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 6.4L cummins Swapped
Insta @trash.panda250
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10-23-2017, 05:55 AM
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#13756
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Name: Leiffi
Title: Too Much Time
Status: Not Here
Join Date: Jan 2013
Member`s Gallery
Posts: 1,381
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Quote:
Originally Posted by biggy238
CAT designed the engines to run at 1300rpm, full throttle at any speed lower than the top holes. Climb a little past peak, row a gear.
I always run the ones I drive up to 1500
Sent from my XT1575 using Tapatalk
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Where is peak power ? 1800 rpm ?
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10-23-2017, 07:03 AM
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#13757
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Name: BRE
Title: Too Much Time
Status: Not Here
Join Date: May 2010
Location: Southwest MO
Member`s Gallery
Posts: 12,705
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I run this truck 1500/1600 depending on the current situation, and then will let it pull to 1200/1300.
Obviously under 1300 you have to really start watching the temp and most cats I’ve run, fall on their face under 1300 but this truck keeps on pulling, it just gets warm. I don’t pull it under 1200 as I feel it’s not good on things.
Sent from my iPhone using Tapatalk Pro
__________________
Rick
07 Dodge 3500 - Tow mirrors, silencer ring MIA, Spectra air filter.
Quote:
Originally Posted by jfaulkner
There really is nothing better than OEM. That goes for anything from turbos to boobs.
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RIP Dex KCCO
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10-23-2017, 09:10 AM
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#13758
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Name: biggy238
Title: Too Much Time
Status:
Here
Join Date: Aug 2008
Location: Just North of Wrong
Member`s Gallery
Posts: 10,868
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Quote:
Originally Posted by Leiffi
Where is peak power ? 1800 rpm ?
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Probably, depends on what file he has. It goes back to what you said, peak tq = peak efficiency. Peak tq on most ohwy files occurs at 1250rpm
Sent from my XT1575 using Tapatalk
__________________
Check out @bdmaximusworx
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 6.4L cummins Swapped
Insta @trash.panda250
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10-23-2017, 09:18 AM
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#13759
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Name: Mr.T
Title: DPF's are gay
Status: Not Here
Join Date: Dec 2009
Location: Rexburg, Idaho
Member`s Gallery
Posts: 8,030
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well there's part of your problem . quit letting it pull clear down to 1200, every cat powered truck i ever drove liked to be kept between 1400 and 1600
__________________
2019 L5P, missing some stuff that makes it quiet.
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10-23-2017, 09:21 AM
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#13760
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Name: biggy238
Title: Too Much Time
Status:
Here
Join Date: Aug 2008
Location: Just North of Wrong
Member`s Gallery
Posts: 10,868
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435hp KCB test Params. Peak exhaust temp is 1240* @manifold
Sent from my XT1575 using Tapatalk
__________________
Check out @bdmaximusworx
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 6.4L cummins Swapped
Insta @trash.panda250
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