Gearing for OM617 in my 95 S10
 

OK I have been driving my 95 s10 with the om617 in it with a 98 s10 5 speed from a 4.3 with
3.42 rear gear. The problem is that the take off is far from good ( might get me ran over)
I have a set of 4.10 gears that I am looking to install and a set of 3.73 not sure what would be the best. Not looking for a race car just not to get ran over.
What is your thoughts on this.
Vette Attachment 20349

Before i am told to check the ALDA I have check all of that and is working.
but I am looking to adjust the boost.

I'd say go with the 4.10 rear gears. If it ends up too low you can always correct that with slightly larger tires.

What is the thoughts on setting the timing up a little if so need info on the best way to
handle it.
Thanks Vette

Are you able to currently utilize 5th gear? I'd think 4.10's also, but I'd first find out what the overdrive gear ratio is in your transmission and then calculate the tire height to determine the RPM's in 5th. Everything I've read says the OM617 cruises best around 2800-3000 rpm's and I'd shoot for that at 70 mph for my use.

I use 5th gear now but the truck will lug down under 50mph and need to drop down to 4th gear to build any speed.I think I am just going to install the 410's and see what it will do.
I will have to see what to do about my speedometer,but 1 thing at a time.
I still would like to look at bumping up the timing a little to see if it would help on the bottom end power.
Vette

mark go here and they have a great article on it
How to Set IP Timing via the Drip Tube Method - Pictorial - PeachParts Mercedes ShopForum

also I hope fte chimes in here he set his timing at 28 degrees I think:scare2: he said it starts a little rough but once warm runs good

Thanks Dennis.
How is your project coming.

When I bumped the timing up it helped the bottom end alot, not sure what tire size you have, but with 410's you need 28-30in tires to be in the sweet spot. You might be able to get away with the taller tire running 2wd with a more areo rig. Also turn the alda out a little.

This is a reg cab 2 wd with 255/60/16 I have adjust the alda but no were I adjust it I can not get it to black smoke. Would 28 degrees to much on the timing.
Vette

I still don't get any black smoke, but I have a super low 1st gear so it launches fast. 28 may be too much, I have mine at 26-27, its kind of hard to be exact, I initially had it @ 30 before I got the whole drip method down, it ran but sounded like a cummins, so I backed it off as far as the slots would allow, I need to pull the pump again and move it a couple teeth so I can figure if it is actually in the sweet spot, just need some time to play. It will be great if a few more of us do some R&D so we can get it perfect.

Thanks FTE for your help
I think I will go with the 410s and set the timing a 26 and see how that does.

mark when you get your wrenches do your valves also that will help and check that your injectors are popping off correctly

Put the 410s in and much better now adjust valves and up boost next and ride.
Vette

What kind of mileage do you get with your truck? I'm in process of putting a Kubota in a 96 S-10 to see what kind of mileage I can get out of it. Do you have any pics of your adapter plates for the transmission?
Thanks Mike

I can tell you that 5.38's and 29's are not a good combo for the highway. Might be good for a farm truck though. :argh:

I am getting around 31 mpg in town,I think I can get better in time.
I bought my adapter plate from. Mercedes diesel info
but I mod it to work with a 5 speed.

Vette

That's not bad mpg, do you have plenty of power? I'm somewhat concerned the Kubota is going to be a bit under powered but it should get very good mpg. I looked at the adapter plate link, that's nice, I'm building one similar out of 3/4 aluminum.

As far as power it will do not a race truck.
It is close to the power as a 2.2 s10 little less on take off.
I am running 373 gears and that helped a bunch.
Vette

That's reasonable power; I will be satisfied if I can get comparable power out of the Kubota. My truck also has a 3.73 rear gear and the final drive in the transmission is a .83, by my calculations those numbers should put me in a pretty fair power band and rpm at interstate speeds. My goal is fuel mileage not a necessarily power, but it has to be drivable.
:pca1:

I think I am at around 125hp that will be the difference i think.
with diesel price right now I am not sure that a 2.2 at 28 mpg would be about the same.
But not as much fun.
Vette

i have mine set up with an om617 ax_15 combo and i had to change my rear gearing from 373 to 308s to hold 70 comfortably. I have the pump max load screw cranked all the way and the alda turned out prolly a full turn also disconected the wastgate hose. mine blows plenty of black. i get around 16psi now. i was hauling a trailer with a harley behind me and i was getting about 35mpg. Ive been real happy with the truck since i completed it. just cant keep a alternator belt for more than about 1500 miles. its also not a turtle maybe a little slower than the 2.2 was but i have much difrent rear gears now.

I'm turning 3K at 70mph.
running 4.56 w/35s

I don't have OD, so my final is 1:1

What would you call comfortably?