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  #1  
Old 12-01-2005, 03:30 AM
Hit Man X's Avatar
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Thumbs up ALDA tweak complete - 300SDL

Read this first - 603 ALDA tweak, CCW or CW?



So I spent the last 4-5 hours changing glow plugs, reinstalling the intake manifold, burping the power steering system after new hoses, fixing PO's mistakes, new fuel hoses everywhere under the hood, and more.

Since the ALDA is now cranked up the car is quite a bit dartier off a dead stop than before. Difference is similar to the one on the SD. Well worth the time to do so. It doesn't feel as though there is nearly as much lag as before.

Here are some pics of all sorts of stuff. Be VERY aware how nasty EGR makes the intake!











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'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

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  #2  
Old 12-01-2005, 03:31 AM
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More EGR...











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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.
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  #3  
Old 12-01-2005, 03:59 AM
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Excellent... so it seems as jackrabbity off the line as a 617 or what? The manifold doesn't look that bad... doubt your engine was being choked...
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  #4  
Old 12-01-2005, 04:32 AM
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Quote:
Originally Posted by Ara T.
Excellent... so it seems as jackrabbity off the line as a 617 or what? The manifold doesn't look that bad... doubt your engine was being choked...


Pretty close to it from a dead stop. It's worth the time to crank it up, since I needed glow plugs (and a project ) it wasn't a bother to remove that manifold.

Ah yes that manifold, it was REALLY caked up in the crossover tube. But since I have the extra one I'll have that sent out... no sense in having all that buildup. With the motor hot a can of SeaFoam or other topend cleaner may get rid of most.

I also peered at the valves, quite a bit of that junk on the backside of them too. So I will probably run a few cans of SeaFoam through there to see if I can get some of that burned out. Maybe that BG stuff I've seen too.
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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.
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  #5  
Old 12-05-2005, 06:32 PM
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Drove Karl around all day today so had some good tests from a dead stop. It's very different with the motor really warm. My coolant temp hardly gets to 80C much so I was basing past claims off of oil pressure... as when it's hot pressure is lower at idle.

Anyhow, I recommend this mod to anyone 100%... it's better now than when first tested.
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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.
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  #6  
Old 12-05-2005, 07:00 PM
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Congrats on the ALDA tweak.
But why isn't your coolant getting up to over 80C?
If the gauge and sensor are reading properly then I would suspect the thermostat is sticking open partially or something to cause the coolant to stay below 80.
A 603 should warm right up and stay above 80 unless you are on a long down hill mountain road or something
Fuel is heated by the coolant then passed on thru the fuel thermostat device (small cylinder with four spigots on it) and that I believe is partly to figure in the performance with this engine, esp in really cold weather.
You better check that thermostat, even if it is new.
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  #7  
Old 12-05-2005, 07:24 PM
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That intake pic looks like and old mans arteries that had McDonalds everyday for 50 years. But it really is not that bad. You should see some of the Jetta Tdi's after about 50k miles. Yuk!
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  #8  
Old 12-06-2005, 04:10 AM
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Quote:
Originally Posted by dieseldiehard
Congrats on the ALDA tweak.
But why isn't your coolant getting up to over 80C?
If the gauge and sensor are reading properly then I would suspect the thermostat is sticking open partially or something to cause the coolant to stay below 80.
A 603 should warm right up and stay above 80 unless you are on a long down hill mountain road or something
Fuel is heated by the coolant then passed on thru the fuel thermostat device (small cylinder with four spigots on it) and that I believe is partly to figure in the performance with this engine, esp in really cold weather.
You better check that thermostat, even if it is new.


I think a big factor is that my coolant is basically water currently.

Before it'd always heat up to 80 no sweat. Since it's finally inspected I can drain it again, throw in my flush, and get the proper stuff in there.
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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.
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  #9  
Old 12-17-2005, 06:28 PM
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After a few weeks of driving with the 603's ALDA maxed out, I have decided maxed out is too much for the 603 as it puffs smoke from a dead stop. It will load up with soot if left to idle for a while then smoke HARDCORE when driving again.

I have to remove my intake manifold again here soon anyway so I'll turn it back CW one full turn then report back.
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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.
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  #10  
Old 12-17-2005, 06:54 PM
BusyBenz
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You have covered up in your pictures the intake ports...head.........what do they look like?

Generally it is there that restriction happens! If they are not nearly plugged up with thick oily clumps there isn't a depreciable restriction. If you need to clean each one make sure the valve is closed and use a shop vac to remove any residual left behind from a cleaning.
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  #11  
Old 12-17-2005, 07:26 PM
BusyBenz
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Quote:
Originally Posted by Hit Man X
After a few weeks of driving with the 603's ALDA maxed out, I have decided maxed out is too much for the 603 as it puffs smoke from a dead stop. It will load up with soot if left to idle for a while then smoke HARDCORE when driving again.

I have to remove my intake manifold again here soon anyway so I'll turn it back CW one full turn then report back.
I turned back a 1/2 turn on my Alda, don't need the extra!
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  #12  
Old 12-17-2005, 07:57 PM
Ra_ Ra_ is offline
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From the other thread:

Quote:
Originally Posted by Hatterasguy
Cool, new glow plugs help! Adult Swim rules!
Absolutely love Family Guy and American Dad.
Boondocks was not bad. Don't care for the rest of it.

The 'staff' at Adult Swim is sad.
A perfect example of people who think they are funny and clever...
but are neither.

For real chuckles, I like the writers for Most Extreme Challenge.

Back to diesels...
I'm gonna start a thread for 0-60 times.
I dug out my stopwatch and will check mine tomorrow.
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  #13  
Old 12-17-2005, 07:59 PM
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Quote:
Originally Posted by BusyBenz
You have covered up in your pictures the intake ports...head.........what do they look like?

Generally it is there that restriction happens! If they are not nearly plugged up with thick oily clumps there isn't a depreciable restriction. If you need to clean each one make sure the valve is closed and use a shop vac to remove any residual left behind from a cleaning.


They were full of crapola just like the intake manifold and it's crossover. I used some Seafoam on the 617 but it got really rev happy (obviously due to open manifold) but it's not something I'd care to do again.

How is one to clean the backside of those valves?
__________________
I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.
[/IMG]
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  #14  
Old 12-17-2005, 08:00 PM
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Quote:
Originally Posted by Ra_
Back to diesels...
I'm gonna start a thread for 0-60 times.
I dug out my stopwatch and will check mine tomorrow.


Actually I was planning to give mine a run tonight before coming back to the house after the car wash.
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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.
[/IMG]
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  #15  
Old 12-17-2005, 10:13 PM
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Eric,

The new '87 SDL is just slow as hell off the line. It's so slow that it's a menace in traffic unless you push it and get some boost at 2500 rpm or more.

I've got to do some serious tweaking of the ALDA on this one. I thought my '86 was slow off the line..........until I drove this one.

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