om603.931 (g-class) - more lowend torque solutions?
om603.931 (g-class) - more lowend torque solutions?
i was reading the site over last several days trying to find out any finalised solutions for om603 non-turbo engine upgrade (603.931). unfortunately found no one yet.
the stock engine provides quite "slow old man style" driving on the almost 3 ton truck (113hp, 190nm). especially I face lack of torque in mud or on the highway with 35" tires.
so i need your advice on what could I do provided I need to keep the block original (unchanged). another important point - i would like to keep minimum level of electronics. the hps are not important but lowend torque is the key.
initially i considered putting om606 head (non-turbo) - ie change the setup to 4 valves one and revise the pump to add a bit more fuel. perhaps installing 6-7mm.
I was never thinking of turbo modifications as I simply was not aware of any good lowend torque solutions. probably there are some - that's why i need your advice on.
not sure yet that my block could fit 606 turbo - this is another potential solution but it requires some electronics + turbo and IC to be added....
So the questions are:
- would it ever make any torque wise sense to install 606 non-turbo and increase fueling?
- any ideas of the better minimal electronics lowend torque solutions?
PS my lovely g-wagon is used as a daily car but it is updated to fit my expedition truck requirments
hi, i need some kind of advice
i was reading the site over last several days trying to find out any finalised solutions for om603 non-turbo engine upgrade (603.931). unfortunately found no one yet.
the stock engine provides quite "slow old man style" driving on the almost 3 ton truck (113hp, 190nm). especially I face lack of torque in mud or on the highway with 35" tires.
so i need your advice on what could I do provided I need to keep the block original (unchanged). another important point - i would like to keep minimum level of electronics. the hps are not important but lowend torque is the key.
initially i considered putting om606 head (non-turbo) - ie change the setup to 4 valves one and revise the pump to add a bit more fuel. perhaps installing 6-7mm.
I was never thinking of turbo modifications as I simply was not aware of any good lowend torque solutions. probably there are some - that's why i need your advice on.
not sure yet that my block could fit 606 turbo - this is another potential solution but it requires some electronics + turbo and IC to be added....
So the questions are:
- would it ever make any torque wise sense to install 606 non-turbo and increase fueling?
- any ideas of the better minimal electronics lowend torque solutions?
PS my lovely g-wagon is used as a daily car but it is updated to fit my expedition truck requirments
this is the engine bay
![[Image: 07042009866.jpg]](http://photo.domongol.ru/07042009866.jpg)
this is the example of om606 non-turb installed on g-class
![[Image: P1050894.jpg]](http://photo.domongol.ru/P1050894.jpg)
a couple of pics of my rig
![[Image: 170420101479_2.jpg]](http://photo.domongol.ru/170420101479_2.jpg)
![[Image: IMG_0102_2.jpg]](http://photo.domongol.ru/IMG_0102_2.jpg)
![[Image: IMG_0103_2.jpg]](http://photo.domongol.ru/IMG_0103_2.jpg)
![[Image: IMG_0105_2.jpg]](http://photo.domongol.ru/IMG_0105_2.jpg)
thanks - i'm aware that ld add 606 non-turbo will add just 23hp and 20nm through double camshaft and 4 valves per cylinder. I hope your experience could add some new ideas provided I dont want significantly increase fuel consumption....
so any other ideas?
ok - some photos
this is the engine bay
this is the example of om606 non-turb installed on g-class
a couple of pics of my rig
thanks - i'm aware that ld add 606 non-turbo will add just 23hp and 20nm through double camshaft and 4 valves per cylinder. I hope your experience could add some new ideas provided I dont want significantly increase fuel consumption....
so any other ideas?
Nice truck! My UNIMOG has only 82HP (2.2l) turning 37" tires and weighs 6250 pounds. THAT'S old man!
These small engines need high RPM's to generate any power - especially the non-turbo models. The 606 does virtually nothing below 3500 RPM.What is your goal? Do you want to go faster in the mud or just have the power to move through the thick stuff? You might consider changing the differential ratios but that will sacrifice top speed.
1998 MB E300 - 194,000 miles. Current/future mods: 7.5mm pump elements, Holset HX40 Turbo feeding Eaton M90 supercharger through custom fabbed intake system. Aeroturbine muffler, scratch-built 4" stainless exhaust. EGR eliminated, ECM recalibrated, modified rack position feedback circuit. Porterfield RS brake pads, Bilstein sport shocks, VDO EGT, oil and boost gauges.
2000 Ford F250 - 150,000 miles. Current/future mods: DP Tuner 3 map chip, scratch-built high flow intake, high output IDM, open circuit fuel system, ball bearing turbo, South Bend full metal clutch, slotted and drilled rotors. Autometer Sport Comp EGT and boost gauges.
Hi Kotka,
Nice truck! My UNIMOG has only 82HP (2.2l) turning 37" tires and weighs 6250 pounds. THAT'S old man! These small engines need high RPM's to generate any power - especially the non-turbo models. The 606 does virtually nothing below 3500 RPM.
What is your goal? Do you want to go faster in the mud or just have the power to move through the thick stuff? You might consider changing the differential ratios but that will sacrifice top speed.
1998 MB E300 - 194,000 miles. Current/future mods: 7.5mm pump elements, Holset HX40 Turbo feeding Eaton M90 supercharger through custom fabbed intake system. Aeroturbine muffler, scratch-built 4" stainless exhaust. EGR eliminated, ECM recalibrated, modified rack position feedback circuit. Porterfield RS brake pads, Bilstein sport shocks, VDO EGT, oil and boost gauges.
2000 Ford F250 - 150,000 miles. Current/future mods: DP Tuner 3 map chip, scratch-built high flow intake, high output IDM, open circuit fuel system, ball bearing turbo, South Bend full metal clutch, slotted and drilled rotors. Autometer Sport Comp EGT and boost gauges.
the initial purpose - is the expedition vehicle. I will send it to Latvia for complete restoration / modification in a couple of month - 20 years old veteran needs some nice care
i use it for daily drive as well. I dont feel too slow on the streets but realy hate high rpms and need more low end torque.
the axles are 37:7 or 5.27:1 - the most powerful axle ratio of g-class. i will get my bolt on portals (5 inch) prduced in March
. the new axle ratio will be roughly 4.77:1 which will increase top speed but will slower the acceleration and torque on the wheels....so that's why i need to add more power to engine provided i keep fuel consumption at the reasonable level....as this is an expedition truck
that's the issue - i would like to have more torque at low rpms
the initial purpose - is the expedition vehicle. I will send it to Latvia for complete restoration / modification in a couple of month - 20 years old veteran needs some nice care
i use it for daily drive as well. I dont feel too slow on the streets but realy hate high rpms and need more low end torque.
the axles are 37:7 or 5.27:1 - the most powerful axle ratio of g-class. i will get my bolt on portals (5 inch) prduced in March . the new axle ratio will be roughly 4.77:1 which will increase top speed but will slower the acceleration and torque on the wheels....
so that's why i need to add more power to engine provided i keep fuel consumption at the reasonable level....as this is an expedition truck
(01-05-2011, 06:23 AM)kotka that's the issue - i would like to have more torque at low rpms
the initial purpose - is the expedition vehicle. I will send it to Latvia for complete restoration / modification in a couple of month - 20 years old veteran needs some nice care
i use it for daily drive as well. I dont feel too slow on the streets but realy hate high rpms and need more low end torque.
the axles are 37:7 or 5.27:1 - the most powerful axle ratio of g-class. i will get my bolt on portals (5 inch) prduced in March
so that's why i need to add more power to engine provided i keep fuel consumption at the reasonable level....as this is an expedition truck
Hello, i have the same axle gearing as you but i think it is 5.28 it is the same as the military use at G290diesel.
Do you have more information about portal axle , price , manifactor, picture?.
i also drive offroad, i will go to Arctic trophy at Kola peninsuela for the 4 time in september.
(01-05-2011, 06:23 AM)kotka that's the issue - i would like to have more torque at low rpms
the initial purpose - is the expedition vehicle. I will send it to Latvia for complete restoration / modification in a couple of month - 20 years old veteran needs some nice care
i use it for daily drive as well. I dont feel too slow on the streets but realy hate high rpms and need more low end torque.
the axles are 37:7 or 5.27:1 - the most powerful axle ratio of g-class. i will get my bolt on portals (5 inch) prduced in March
so that's why i need to add more power to engine provided i keep fuel consumption at the reasonable level....as this is an expedition truck
Hello, i have the same axle gearing as you but i think it is 5.28 it is the same as the military use at G290diesel.
Do you have more information about portal axle , price , manifactor, picture?.
i also drive offroad, i will go to Arctic trophy at Kola peninsuela for the 4 time in september.
)))very high level info so far:
- ratio 4.77 = main axle diff 4.11 (G55, G400, etc) X portal box 1.16
- CTIS installed
- clearance change + 5"
- price indication: axles (~EUR5-7k for a set of used or change main diffs on your own ~EUR2-3k) + portals (~EUR12k) + hutchinson wheels (~EUR3-4K if needed) + installation charge
re axle ratio - u r right - 37/7=5.28+
bad calc of myself
I'll make photos and full desc when I finally get them installed on the truck. This will be the first ever g-wagen on bolt-on portals of such ratio )))
very high level info so far:
- ratio 4.77 = main axle diff 4.11 (G55, G400, etc) X portal box 1.16
- CTIS installed
- clearance change + 5"
- price indication: axles (~EUR5-7k for a set of used or change main diffs on your own ~EUR2-3k) + portals (~EUR12k) + hutchinson wheels (~EUR3-4K if needed) + installation charge
re axle ratio - u r right - 37/7=5.28+ bad calc of myself
1982 300D Turbo ... 3,6xxlbs, No fan, No AC, Hood Stack, No ALDA, No rear bumper and stuffed front, A/W Intercooled, Injectors by Greezer and HUGE Pre-Chambers with help from OM616 & Simpler=Better, Fuel Cranked up, 60 Trim Compressor wheel, EGT, EMP, Boost 50" Rigid Radius bar on roof Aux tank for a total of 48 Gal Of Diesel! Odyssey PC-1750 Battery in trunk, 27"x8.5"/R14 Maxxis BigHorn Mud Terrains, In June '14 issue of Off Road Mag
AX15 Jeep Trans swap in progress....
Captain America
01-05-2011, 06:24 PM #11CTIS!!!!!
1982 300D Turbo ... 3,6xxlbs, No fan, No AC, Hood Stack, No ALDA, No rear bumper and stuffed front, A/W Intercooled, Injectors by Greezer and HUGE Pre-Chambers with help from OM616 & Simpler=Better, Fuel Cranked up, 60 Trim Compressor wheel, EGT, EMP, Boost 50" Rigid Radius bar on roof Aux tank for a total of 48 Gal Of Diesel! Odyssey PC-1750 Battery in trunk, 27"x8.5"/R14 Maxxis BigHorn Mud Terrains, In June '14 issue of Off Road Mag
AX15 Jeep Trans swap in progress....
(01-05-2011, 06:50 PM)Jtn190D Why not a om606 Turbo?
This is the whole question -if:
- om606 turbo could be installed on my om603 block
- any chance to get rid of electronics?
- is there any significant difference in torque between om606 non-turbo with bigger plungers pump and om606 turbo stock one?
(01-05-2011, 06:50 PM)Jtn190D Why not a om606 Turbo?
This is the whole question -if:
- om606 turbo could be installed on my om603 block
- any chance to get rid of electronics?
- is there any significant difference in torque between om606 non-turbo with bigger plungers pump and om606 turbo stock one?
To answer you:
- om606 turbo could be installed on my om603 block
IE putting the 606 head on a 603. I doubt it. They are very similar but the oil channels in the 606 are bigger for example.
- any chance to get rid of electronics?
Yes, the 603 mechanical pump fits fine on the 606 block. So just find a better mechanical pump (easier said than done lol). There is also a mechanical NA 606 pump on the 94-95 cars, that should give a little more fuel than an NA 603 pump.
- is there any significant difference in torque between om606 non-turbo with bigger plungers pump and om606 turbo stock one?
Dunno, I'd imagine yes.
I think you should just put a turbo and pump on your current setup. Unless you're willing to swap out the whole engine.
So why can't you just plop in a whole different engine?
To answer you:
- om606 turbo could be installed on my om603 block
IE putting the 606 head on a 603. I doubt it. They are very similar but the oil channels in the 606 are bigger for example.
- any chance to get rid of electronics?
Yes, the 603 mechanical pump fits fine on the 606 block. So just find a better mechanical pump (easier said than done lol). There is also a mechanical NA 606 pump on the 94-95 cars, that should give a little more fuel than an NA 603 pump.
- is there any significant difference in torque between om606 non-turbo with bigger plungers pump and om606 turbo stock one?
Dunno, I'd imagine yes.
I think you should just put a turbo and pump on your current setup. Unless you're willing to swap out the whole engine.
http://www.youtube.com/watch?v=zC1uHsuhdSI
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