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MERCEDES W126 The W126 S Class saloon and coupe from 1979-1992 (260SE, 280S, 280SE, 280SEL, 300SD, 300SDL, 300SE, 300SEL, 350SD, 350SDL, 380SE, 380SEL, 380SEC, 420SE, 420SEL, 420SEC, 500SE, 500SEL, 500SEC, 560SE, 560SEL, 560SEC)

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  #76  
Old 16th October 2019, 05:26 PM
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Default Re: 560sec ece

I must say Iíve seen all sorts of chassis dyno results over the years & most I take with a grain of salt. They either seem far too high or too low & never what Iíd expect to see. Too many variables so it seems. As a result I only trust engine dynos since thereís no error via tyres/diff/trans/torque convertor.

However itís definitely a good idea to get a baseline & try to improve things from there. Personally Iíd ditch the kidneys & do for a custom zorst!
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  #77  
Old 16th October 2019, 05:53 PM
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Default Re: 560sec ece

The S500 has developed a rattle in one of the mufflers, a legacy of a low km prestige car. I'ts minor and I can't hear it driving but...

Should I do a cat delete and just keep the rear resonators? And maybe those remote valves that bypass?

Or maintain limo/grandpa mode.
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  #78  
Old 16th October 2019, 06:36 PM
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Default Re: 560sec ece

Quote:
Originally Posted by abl567 View Post
The S500 has developed a rattle in one of the mufflers, a legacy of a low km prestige car. I'ts minor and I can't hear it driving but...

Should I do a cat delete and just keep the rear resonators? And maybe those remote valves that bypass?

Or maintain limo/grandpa mode.
Install a foot operated cut out as was all the rage in the 1920s and 30s.
http://www.mtfca.com/discus/messages...tml?1310348282
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Brian
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  #79  
Old 17th October 2019, 08:58 AM
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Default Re: 560sec ece

Go for high flow aftermarket CATs since they work & they’re affordable. Delete excessive mufflers & bends. Only use flanges & no slip joints. A twin 2.5” with a correctly designed balance pipe should do the trick. Forget aftermarket exhaust valves since they’re illegal in most states (along with CAT delete).
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01 Ford AU 5L (Deep Blue)
88 420L Euro#-P
88 420L#-P
88 420L#2477-P
87 560L#2020 (Dora 2)
87 560L #9987
87 420L#4309-P
87 420L#-P
86 560L#5896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora 1)
77 450L#7010-P
75 450L#8414 (Gold Nugget)-P
57 Buick 73A (Titanic)
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  #80  
Old 17th October 2019, 09:01 AM
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Default Re: 560sec ece

Consider stainless but depends on how long youíre keeping the car...
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01 Ford AU 5L (Deep Blue)
88 420L Euro#-P
88 420L#-P
88 420L#2477-P
87 560L#2020 (Dora 2)
87 560L #9987
87 420L#4309-P
87 420L#-P
86 560L#5896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora 1)
77 450L#7010-P
75 450L#8414 (Gold Nugget)-P
57 Buick 73A (Titanic)
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  #81  
Old 18th November 2019, 08:16 PM
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Default Re: 560sec ece

I had ordered a K/KE fuel pressure gauge set to try and sort of my lean running. It arrived last week so sunday evening I had a go at testing the 560.

According to the workshop manuals, you're looking for around 6 bar from the test port and then 6.4 bar if you open the valve to the cold start injector port. More important than the actual readings is the 0.4 bar differential.




I was 6.0/6.3. This eliminated fuel pump or pressure regulator. as the ECE 560 has no O2 sensor, the EHA needs to be manually adjusted.



The adjustment is behind the screw with the flat screw head. A small allen is used and I went about 1/3 of a turn.

After my adjustment I was at 5.9/6.3, which should be in spec. I ran out of time, next is do a few more tests at higher RPM.

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  #82  
Old 20th November 2019, 12:05 PM
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Default Re: 560sec ece

Last night also also had a neighbor hold the car at first 1,000 then 2,000 RPM and checked the pressures. They stayed where they should be.
I also did the quick test where I pushed the pressure plate a bit at 2,000 RPM. If the car is lean, it should pick up revs. If good, it should bog down with the more fuel. Mine bogged down which makes me think that I have solved my lean running problem.

I also checked the potentiometer on the side of the air flow meter. This was very slightly above spec, but voltages changed as they should when I moved the plate. So I think I am ok there too.

I don't have a dyno to test the car on, but it does seem to be operating in the specs outlined in the workshop manual now.
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  #83  
Old 20th November 2019, 06:37 PM
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Default Re: 560sec ece

Nice one and very thorough work! Fuel pressures are critical & I think if youíre still having issues you can now look elsewhere to find the culprit. Personally vacuum issues seem common & after seeing kjet injector cutaways Iím confident the internal filters regularly block up which will affect spray patterns & flow.
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01 Ford AU 5L (Deep Blue)
88 420L Euro#-P
88 420L#-P
88 420L#2477-P
87 560L#2020 (Dora 2)
87 560L #9987
87 420L#4309-P
87 420L#-P
86 560L#5896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora 1)
77 450L#7010-P
75 450L#8414 (Gold Nugget)-P
57 Buick 73A (Titanic)
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  #84  
Old 21st November 2019, 08:14 AM
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Default Re: 560sec ece

Quote:
Originally Posted by Oversize View Post
Nice one and very thorough work! Fuel pressures are critical & I think if you’re still having issues you can now look elsewhere to find the culprit. Personally vacuum issues seem common & after seeing kjet injector cutaways I’m confident the internal filters regularly block up which will affect spray patterns & flow.
Yes, injectors are something I probably should do at some point.
I am going to take the car to a mechanic with an exhast gas analyser (one near me) to double check what I have done.
Melting a piston is not worth skimping on a hour or two of his time to run a few tests.

More here:
http://www.classicjalopy.com/2019/11...ha-adjustment/
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  #85  
Old 28th November 2019, 07:01 PM
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Default Re: 560sec ece

Does anyone know the size of the low pressure hose from the bottom of the SLS reservoir to the pump?

Mine is old and seeping oil


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  #86  
Old 29th November 2019, 08:40 AM
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Default Re: 560sec ece

For reference, the details I found are:
(9.5 X 3 mm) part number A114 997 04 82
need 270mm
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  #87  
Old 3rd December 2019, 04:50 PM
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Default Re: 560sec ece

I know itís a real bugger to match with anything aftermarket!! Benz seem to be very good at making it hard for anyone to find reasonably priced parts!!
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01 Ford AU 5L (Deep Blue)
88 420L Euro#-P
88 420L#-P
88 420L#2477-P
87 560L#2020 (Dora 2)
87 560L #9987
87 420L#4309-P
87 420L#-P
86 560L#5896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora 1)
77 450L#7010-P
75 450L#8414 (Gold Nugget)-P
57 Buick 73A (Titanic)
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  #88  
Old 4th December 2019, 08:32 AM
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Default Re: 560sec ece

Quote:
Originally Posted by Oversize View Post
I know itís a real bugger to match with anything aftermarket!! Benz seem to be very good at making it hard for anyone to find reasonably priced parts!!
I've bought some 9.5mm fuel hose, I'll see how it goes.
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