OM617 in 2000 s10 Alda question.
 

SO this is a dumb question but i have me alda spun all the way counter clock wise. Do i still need the vacuum lie going from the intake to the alda? I currently do not have it there.

Not a vacuume line but a pressure line from the rear fitting on the intake manifold, this is also a good place to tee off a line for the boost guage.

That's what I ment, sorry I have my boost gauge hooked up to the fittin on the back of the intake but not T-Ed off to the Alda. Would it make any difference if I hooked up that Alda since I have it spun all the way counter clockwise?

you still need the alda hooked up the alda regulates fuel according to boost pressure make sure the banjo bolt going into the intake manifold is free and clear

will this make it any faster off the line? or just eliminate the black smoke when i get on it?

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anyone???

I really doubt it will be any faster off line will eliminate some smoke if you want it faster talk to fte he has been doing some timing advancing these old diesels were not made for take off they were made for a smooth cruiser

Thank you very much, Mine is very slow due to running 3:50 gearing and 35' tires
I also can not tal to anyone yet I only have 7 post i need ten :(

corvette73 has been experimenting with gears he has came up with 272 and 235 55 16 which is a 26.2 dia

im getting 4.88's at the end of the month.

I am running 373 gears with a 98 s10 5 speed from a 4.3 with 235/55/16 tires and has good takeoff and runs out very well.
Corvette74
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my typo I thought I was typing 373 I was doing some calculations and if you were running 410 and used a 32" dia tire you should be able to hit the same rpm's as corvette73

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I meant corvette 74 sorry mark
:argh::argh::scare2:

NO PROBLEM I have been called a WHOLE lot worse.
Vette

kid down the street from me had 4:56's with 36/12.5R15 and it moved pretty good, so im thing 4.88's with 35/12.5R16 will work perfecto

any one using an ax15 in their s10 get the speedo to work? or tach?

That mb om617 will not like too many rpm a least mind don't.
With the 410s that I had in it on the highway it was turning to many rpm at highway speed. Vette.

RPM
 

I USED 34.5 IT SEEMS 36 TIRES VARY FROM 34.5-35 here is the calculated rpm's

It will not see highway that much, it is my daily driver but I can jsut put aroud town with it, im only 20 and still in a community colledge. So i should be good for another year until i get a job that pays more than 10 dollars an hour.

yea the tight budget if you keep rpm at 2000-2200 you should be good

I am glad to see a 20 year old take on a project like this,I have a 20 year old son that would not have a clue were to start:jump::tu::tu::hellox:
But would not have a problem driving it as long as I fix it.
Vette

haha, thank you
heres my truck
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Well U wont have a problem with your oilpan Vette

nope, I have no problems with steering or anything like that. my oil pan is actually up about 1/2" than the crossemember that the lower contorl arms bolt on to. My pitman arm is about 1" away at full lock one way because I switched to an astro van steering box due to pushing the front end forward.:tu:

Im just putting the finishing touches on my om617 swap and im looking into the alda now. I pulled the motor out of the car about 4 years ago when i didnt know what to keep and what not to keep. So if i understand what you guys saying the alda banjo get directly connected to the banjo at the rear of the intake? what else hooks to the alda on the IP looks like a vac line??

Just run line from alda to back of intake and cap off any others on the alda.
Mine t'ed off at the alda and I just caped it off Vette

Thanks you rock!

Hi corvette74, hope you won't mind but I have three Mercedes with the 617 engine and they regularly run at 3000 RPM going down the road at 65. I have also had it up to 80 didn't look at what the RPM was but no odd noises. When accelerating they regularly hit 4000 or a bit more. So 2000 is just starting to run.

4.88 gearing and 35's wont allow mine to get up to 55 :(

With out a tech I do not no what I am turning but with the set up I am running I have no problem running 80+ mph on the highway as I sad I have no clue what rpms I am turning but sound ok. Vette

According to a couple of gear calculators if your final transmission gear is 1:1 as most are then with 35 inch dia tires and 4.88 diff you should be getting right at 64 MPH. Could be that your speedometer gearing is off. Bigger tires will show you as going slower then you actually are. 3300 RPM should have you going 70 MPH. The Mercedes 617 should still be quite happy at that RPM. You should be getting pretty good acceleration also given the speed to RPM that you have.

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Have you thought of using a tach from a Mercedes and rig a case for it? Shouldn't be too difficult a hookup. The sensor is already there on the front of the engine and all you would need is the converter that usually sits on the drivers inner fender and then two wires to the tach.

1:1 would be 4 th gear in 5 th most of the 5 speeds are averaging about .70 for an overdrive ratio

clearstroker
I could buy a tech for this thing but just not that interested in one.
As long as I dont over tech it I think it will be alright.
Vette.

well see my speedo doesnt work after using the jeep tranny for some reason. both speed sensor were only two wires... but my stock speedo doesnt work so I was using a gps.. also a tach would be pretty cool I suppose but you have to my pedal pretty much to the floor at all times. itll be about 1/2 form the floor, and then that last half inch it really doesnt go much faster it jsut blows smoke.

Is your turbo working?
If you are blowing black smoke then the fuel is not burning.
Corvette74

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deck60
How u coming on yours?
BLOWING SMOKE YET Vette

Sounds like the turbo to me.

Well I guess as long as you stay below about 60 MPH indicated on your gauge then you should be OK.
Of course without a tach how do you know you aren't over taching it?

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That smoke sounds like turbo problems to me also. I don't think that truck weighs much more then a 300SD and with the gearing it should be flying without trying. Take the elbow from the aircleaner to the turbo off and see if you can easily turn the turbo shaft by hand. If it doesn't turn real easy then you need to rebuild the turbo. The bushing and seal kits are easy to get and it doesn't take much to do the job. Well other then getting the thing off the engine.:)

I can hear my turbo spool, and when I first go the motor I had the turbo off and you could spin in very freely. Im assuming hte black smoke is due to having then injection pump turned up a quarter turn. Im starting to think that maybe the gears in the trans are very short.

Have you eliminated the possibility of air in the fuel system? Or maybe something may be binding.

i believe there's no air in the fuel system due to having the stock fuel pump constantly on. I don't see what could be binding. I guess this is what i get for using a motor and not rebuilding it.

If it has enough compression that it starts easily the motor probably isn't bad, they really are robust. You are going to find an airleak, problem with full throttle travel, or ip items that is not correctly installed, and the truck will be better.

What exactly did you turn up a quarter of a turn? Also are you sure that the previous owner of the engine had not been messing with the pump?

well I ran the boost line from the intake to the alda and the motor is abunch quicker now. I do have the alda adjusted all the way counter clockwise, would turning it clock wise make it any quicker? with 4.88 gearing it revs up pretty quick tho so I assuming the top speed may only be right around 50 due to axle gears and transmission gears.

I turned one of the screws inside of the injection pump that increases the fuel. I'm not sure if the motor was ever tampered with before becauseI bought the motor off a guywho bought the car to restore but it ended up having a rusted out frame.'


I also felt my turbo today and I had a slight bit of shaft play, Im not quite sure how this happend because the turbo was nice and snug when I first go it. This is a dumb question but why is it bad to plug the line off that goes from your turbo to your wastegate?