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  #31  
Old 08-18-2012, 08:23 AM
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Location: Barrington, RI
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My 92 has the same plumbing as your 93. My 91 looks COMPLETELY different.

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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife
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  #32  
Old 08-18-2012, 08:29 AM
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lied to for years
 
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Location: Elizabethton, TN
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Talking

Out here in Tennessee you want to make black smoke,and I love too.With my ALDA at the landfill
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  #33  
Old 08-18-2012, 08:33 AM
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Quote:
Originally Posted by oldsinner111 View Post
Out here in Tennessee you want to make black smoke,and I love too.With my ALDA at the landfill
Also tempting in RI....I live in an uber-green, progressive part of the state....these people could use some black smoke!
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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife
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  #34  
Old 08-18-2012, 12:07 PM
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smoke gets in your eyes
 
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Quote:
Originally Posted by shertex View Post
As to risk with the ALDA off, AFAIK the only risk is if the wastegate hose were to fail then you'd have an overboost situation. (Perhaps Brian can give you more details). I assume this is still intact with your mod. With some cars this is a metal line (like on my SDL) so no risk of breaking. Haven't been able to identify it on my 91 or 92. If you can identify it, perhaps you can help me find mine.
When you adapt a pressure wastegate actuator to a 602.962, the vacuum actuator needs a boost pressure signal to function. As in Dave's modification mirroring the 603.96 setup, a fitting is added to the compressor outlet as a boost pressure signal source. Other's run a line from the far side of the intake manifold where there are existing unused threaded fittings, or they tap into the ALDA signal line. The 602.962 as delivered takes a vacuum signal courtesy of the EDS so actuator incapacity leaves you with little no boost as opposed to uncontrolled boost. In short, you're looking for something you're not going to find until you do the mod

Sixto
87 300D
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  #35  
Old 08-18-2012, 12:15 PM
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Quote:
Originally Posted by benmack1 View Post
After sleeping on it a night, I am really contemplating whether I can get away (SAFELY for the motor) with leaving the ALDA off. If I have a reliable boost relief line (to the wastegate actuator, that relieves boost at 14 psi as GSXR's design does), I am thinking I should not be in an overboost situation. But again, I am all ears on further advice if I am not fully understanding the system and risks. As for smoke, don't care just want the car to run well and safely.
An EGT gauge is a good idea but if you have the discipline to keep an eye on an EGT gauge, you have the discipline to back off your right foot when you feel the engine is producing Finnish amounts of power. You'd need your foot planted longer than it takes your car to get to 60mph for an inoperative wastegate actuator to cause harm. If you don't put your foot to the floor on a regular basis, you and your combustion chambers will never notice an inoperative wastegate actuator. If you regularly put your foot to the floor, sell the '93 and buy my butt ugly '87 that goes like stink... with the untouched ALDA in place.

Sixto
87 300D
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  #36  
Old 08-18-2012, 02:11 PM
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Quote:
Originally Posted by sixto View Post
An EGT gauge is a good idea but if you have the discipline to keep an eye on an EGT gauge, you have the discipline to back off your right foot when you feel the engine is producing Finnish amounts of power. You'd need your foot planted longer than it takes your car to get to 60mph for an inoperative wastegate actuator to cause harm. If you don't put your foot to the floor on a regular basis, you and your combustion chambers will never notice an inoperative wastegate actuator. If you regularly put your foot to the floor, sell the '93 and buy my butt ugly '87 that goes like stink... with the untouched ALDA in place.

Sixto
87 300D
Is it correct that as long as my pressure wastegate is functioning correct, and I am not getting more than 14 psi boost that with or without an ALDA it should be a protected system. Meaning, it ain't gonna get enough air to kill the motor and my only real risk is no ALDA and no turbo wastegate control??? That's been my assumption in thinking to leave the ALDA lay in my toolbox in the trunk.
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  #37  
Old 08-18-2012, 02:19 PM
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smoke gets in your eyes
 
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That sounds like a dichotomy If you can guaranty no more than 14 psi of boost then too much boost isn't going to damage your engine. The only real risk is the wastegate sticks closed and you hold your foot to the floor too long. If you're really worried, hook up the overboost switch, grab one from an earlier car if you don't have one, to a bulb and buzzer in the cabin.

Sixto
87 300D
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  #38  
Old 08-18-2012, 06:34 PM
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OK, I am all set for now. What I have done.

I removed the ALDA and plan to leave it off at least for now. I think if I drive with some sense I'll be OK. I have a boost gauge and the pressure swap on my turbo that begins to dump the turbo at 14 psi. I took it for a 30 mile run today and just love the car. I am not a lead foot and fairly well in tune with the car so I am going to chance it.

Since the ALDA is off, I just hooked my turbo wastegate pressure line into where the ALDA used to take it's signal from the manifold. Very simple and clean. I'll need to keep any eye on that connection to keep it clear of crap from teh manifold.

Here is a quick topside view youtube video of what I have currently.


Mercedes turbo - YouTube


Long term (the next glowplug change probably), I will have the manifold cleaned out and now with the EGR gone, it should then stay nice and tidy. I'll also probably put a nipple for the pressure signal over on the flapper tube section or possibly at the EGR flange if I remove that and put in a cover plate. Both seem like superior places than what I have but for now this will work I think.

So what caused my problems in the first place. As some suggested, my ALDA was NOT getting the boost signal as I had erroneously assumed. When I pulled all the plumbing out, I found the line was completely clogged. There is a small green hose connector in between a straight line from the intake and the Y in the line that goes to the ALDA and the B5/1 pressure sensor. That connector is the smallest point and was chucked full of the manifold residue.

Here is the whole set up, not sure if you can see that connector or not. It's right between the two metalic hose clamps in the pic.



I cleaned it out with some brake fluid.

Here is what came out of that!





I guess it's no wonder it didn't work!!
Attached Thumbnails
Help, local MB mechanics can't figure out my car-turbo2.jpg   Help, local MB mechanics can't figure out my car-turbo3.jpg   Help, local MB mechanics can't figure out my car-turbo4.jpg  
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  #39  
Old 08-18-2012, 06:42 PM
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Very nice...and great video. How many miles on the car?
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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife
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  #40  
Old 08-18-2012, 08:18 PM
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Quote:
Originally Posted by shertex View Post
Very nice...and great video. How many miles on the car?
This one has 146K on the clock. I've had it since 73K. It seems to have enough maladies that I wonder if the miles are real but maybe it's just because it's a 20 year old MB. I don't know, it's been getting 32-34 mpg consistently so I just use it for a daily driver. I kind of like driving an old car that isn't worth much, that I can fix and that I understand alot of what's under the hood and whatnot. I don't care much if I have problems. Just gives me something to do and learn from. It's also a good conversation piece with my colleagues at work. They all drive BMW's or other high end new stuff, while I rumble around in the 300D. They enjoy making fun of me, I enjoy watching my paycheck go into the bank while they drop 60K on a new car. It's hilarious!
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  #41  
Old 08-18-2012, 09:23 PM
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A question if you dont mind... if you remove the ALDA how do you plug the opening where the ALDA mounts..or if not necessary to plug it what measures are taken to ensure grime doesnt go down in that area ?

and secondly,

what affect ( positive or negative ) to the fuel mileage is expected once the ALDA is removed ?

thankyou
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  #42  
Old 08-19-2012, 01:38 PM
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smoke gets in your eyes
 
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You don't have to plug the opening. Spring force holds the plunger against the opening effectively sealing the mounting position. Check occasionally that there isn't an oil leak. You'll likely see oil the first time you remove the ALDA. That's from the ALDA pushing down the plunger. I used a small dose cup over the fitting for a few weeks. You might need a new one every oil change.

One use for the small washers that come with oil filter kits is to set one or two between the IP and ALDA so you can keep the ALDA in place without messing with the ALDA's factory setting yet having the effect of partially to fully disabling the ALDA. You also won't misplace the ALDA if you want to restore its function.

The effect of removing the ALDA on mpg spurs a "guns don't kill" debate. Your right foot decides what happens to mpg. If maximizing mpg is the objective, the ALDA only helps. Some people like to punch it once in a while or at least be able to.

Sixto
87 300D
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  #43  
Old 08-22-2012, 07:32 AM
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Quote:
Originally Posted by sixto View Post
You don't have to plug the opening. Spring force holds the plunger against the opening effectively sealing the mounting position. Check occasionally that there isn't an oil leak. You'll likely see oil the first time you remove the ALDA. That's from the ALDA pushing down the plunger. I used a small dose cup over the fitting for a few weeks. You might need a new one every oil change.

One use for the small washers that come with oil filter kits is to set one or two between the IP and ALDA so you can keep the ALDA in place without messing with the ALDA's factory setting yet having the effect of partially to fully disabling the ALDA. You also won't misplace the ALDA if you want to restore its function.

The effect of removing the ALDA on mpg spurs a "guns don't kill" debate. Your right foot decides what happens to mpg. If maximizing mpg is the objective, the ALDA only helps. Some people like to punch it once in a while or at least be able to.

Sixto
87 300D

Thanks Sixto - much appreciated - I will try the removal of the ALDA failing all else - I began a new thread on the power loss issue so as to not hijack this thread. by the way what do you mean by a dose cup ? Thanks again sir
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  #44  
Old 08-27-2012, 02:31 PM
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Lonely in Louisiana.

Quote:
Originally Posted by vstech View Post
which end of chapel hill are you on? I'm a bit of a drive, but Mt Holly/charlotte is not far, and I can test your fuel pressure, and trace out the lack therof...
I wish you had an identical twin in Louisiana!

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