Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Vintage Mercedes Forum

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 02-25-2007, 07:52 AM
Wodnek's Avatar
Vintage Mercedes Junkie
 
Join Date: Jun 2004
Location: Southeast Wisconsin
Posts: 1,658
Looking at a 74 280

I am looking at a 74 280. It looks good but needs some carb work. Looking at other threads that seems to be the achilles heel on these models. just how troublesome are the carbs on these? With a kit can I expect to be able to rebuild it myself? In the 80s I have rebuilt a few quadrajets with success 50% of the time. If not, is there a good aftermarket replacement?

It is to be a daily driver, not a show piece.

http://cgi.ebay.com/ebaymotors/Mercedes-Benz-200-Series-114-1974-Mercedes-280-4-Door-Sedan-Clean-NICE_W0QQitemZ300084062490QQihZ020QQcategoryZ6329QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
__________________
1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12
1982 380SL
1978 450 SEL 6.9 euro restoration at 63% and climbing
1987 300 D
2005 CDI European Delivery
1995 E300D Handed down to daughter
2006 CDI Wifes

Reply With Quote
  #2  
Old 02-25-2007, 08:32 AM
cth350's Avatar
Registered User
 
Join Date: Dec 2000
Location: Long Island, NY
Posts: 3,717
The 4A1 is basically unstable. Chuck Taylor and others have successfully replaced it with a quadrajet. Rebuilding is straight forward. Watch for warped and broken parts.

Chuck used a Holley 4360c carb. (The c is for integral choke).

-CTH
Reply With Quote
  #3  
Old 02-25-2007, 09:11 PM
Wodnek's Avatar
Vintage Mercedes Junkie
 
Join Date: Jun 2004
Location: Southeast Wisconsin
Posts: 1,658
Quote:
Originally Posted by cth350 View Post
The 4A1 is basically unstable. Chuck Taylor and others have successfully replaced it with a quadrajet. Rebuilding is straight forward. Watch for warped and broken parts.

Chuck used a Holley 4360c carb. (The c is for integral choke).

-CTH
What do you mean by unstable? What can I expect if I get one as a daily driver? Will it strand me? Will it just flood easy?
__________________
1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12
1982 380SL
1978 450 SEL 6.9 euro restoration at 63% and climbing
1987 300 D
2005 CDI European Delivery
1995 E300D Handed down to daughter
2006 CDI Wifes

Reply With Quote
  #4  
Old 02-25-2007, 11:28 PM
Registered User
 
Join Date: Jan 2006
Location: Tucson, AZ
Posts: 4,188
Yeah,if the carb is worn out it can strand you. It can also burn down the car. It can flood the plugs with no warning. It can also run so lean it'll fry the valves.

If it is in good shape they aren't bad carbs. They're just Quadrajets manufactured under an European license. MB got a little too creative with idle compensators and a couple of other features.

Generally the problem with them is they have been abused when rebuilt. Instead of using the proper torque settings people just crank the screws tighter. Same problem with the old Quadrajets on American iron.

Once they're tweaked, they're tweaked! If they aren't too bad and with the proper amount of patience and care the sealing surfaces can be brought back to a reasonably "flat" surface.

I fought mine for three weeks and finally conceded. Too many monkeys using screwdrivers for me to restore.

I adapted a Quad, a Motorcraft two barrel, a Carter two barrel (which I've been running for 6 months) and I am in the process of converting over to a TBI using the Megasquirt ECU.
Reply With Quote
  #5  
Old 02-25-2007, 11:57 PM
DieselBone's Avatar
for the glory.....
 
Join Date: Dec 2004
Location: Mechanicsburg, Pennsylvania
Posts: 355
Quote:
Originally Posted by Mike D View Post
I am in the process of converting over to a TBI using the Megasquirt ECU.
PLEASE keep us updated on your progress!!!! Please!
Thanks
__________________
-Randy Wakefield

1969 220D 4 speed (parts car)
1976 280C
1976 280S
1981 240D 4 speed (parts car)
1982 300D
1983 300TD (Ivory)
1983 300TD (gold)
1985 300TD (gray)
1987 190D 2.5
1970 280SEL (sold)
1977 240D 4 speed (sold)
1974 280 (rusted to death)
---
1927 Chevy 4 door sedan
1938 Chevy 2 door sedan
1950 Willys Jeepster
1955 Studebaker President 4 door
1977 Ford F250
1979 Glastron 17'
1948 John Deere A
1960 John Deere 2010
1979 Satoh S650G
--
2000 Bichon (Doby)
Reply With Quote
  #6  
Old 02-26-2007, 11:00 PM
cth350's Avatar
Registered User
 
Join Date: Dec 2000
Location: Long Island, NY
Posts: 3,717
Funny, I just collected all the parts to do the exact same thing for a 250 lwb that the PO switched to an Edelbrock (the euro M123 motor is 2.5l and uses essentially same 4A1 carb).

I was going to use the original chevy 2.8 computer first to see how it goes.

-CTH
Reply With Quote
  #7  
Old 02-26-2007, 11:22 PM
Wodnek's Avatar
Vintage Mercedes Junkie
 
Join Date: Jun 2004
Location: Southeast Wisconsin
Posts: 1,658
Could I put on the djet system from my 73 450SE parts car?
__________________
1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12
1982 380SL
1978 450 SEL 6.9 euro restoration at 63% and climbing
1987 300 D
2005 CDI European Delivery
1995 E300D Handed down to daughter
2006 CDI Wifes

Reply With Quote
  #8  
Old 02-27-2007, 10:35 AM
Registered User
 
Join Date: Jan 2001
Location: Alexandria, Virginia
Posts: 5,417
Quote:
Originally Posted by Wodnek View Post
Could I put on the djet system from my 73 450SE parts car?
NO

Happy Motoring, Mark
__________________
DrDKW
Reply With Quote
  #9  
Old 02-27-2007, 12:59 PM
Registered User
 
Join Date: Jun 2006
Location: NoVA
Posts: 465
Quote:
Originally Posted by DieselBone View Post
PLEASE keep us updated on your progress!!!! Please!
Thanks
Same here, that sounds like a good upgrade if it works...don't you think it'll need new cams to get the most out of it?

Wonder what model Edelbrock Q-jet carb is the equivalent.
__________________
Nathan
'74 280C - gone to a new home for the finishing it deserves.
'64 356SC
'74 914 2.0

Last edited by JMURiz; 02-27-2007 at 01:12 PM.
Reply With Quote
  #10  
Old 02-27-2007, 03:20 PM
Tomguy's Avatar
Vintage Moderator
 
Join Date: Aug 2002
Location: near Scranton, PA
Posts: 5,096
Quote:
Originally Posted by Wodnek View Post
Could I put on the djet system from my 73 450SE parts car?
If you felt like...
- Modifying the intake manifold and/or heads for the injectors and MAP sensor
- Modifying the distributor to accept trigger points
- Found a way to get the trigger points to fire a sequence for a 6-cyl engine rather than a 4/8 cyl one

Basically, it is possible with a lot of work, modifying and time. But I'd suggest MegaSquirt before D-Jet. Now if you can find one that came with its OWN D-Jet... Keep in mind, each D-Jet ECU is made for the engine it was originally put on. A 3.5 ECU has a different volumetric curve built in than a 4.5's, and I'm sure a 4.5's ECU would have a way different volumetric calculation than an m110 would need...
__________________
Current:
2018 Chrysler Pacifica Limited
1999 Chrysler 300M - 211,xxx

My Mercedes Benz 108 and 109 resource site

Previous:
1972 280SE 4.5
2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
Reply With Quote
  #11  
Old 02-27-2007, 06:40 PM
cth350's Avatar
Registered User
 
Join Date: Dec 2000
Location: Long Island, NY
Posts: 3,717
The M114E and M110E motors were EFI equipped 6 cylinders. I have one of each waiting for a suitable car to put them in.

-CTH
Reply With Quote
  #12  
Old 02-27-2007, 09:35 PM
Registered User
 
Join Date: Nov 2004
Location: Dallas, TX
Posts: 4,972
Ken

You can drop that 350 from your roadmaster into it and scare the crap out of many M-100 owners :-).

All the best
__________________
With best regards

Al

Check out the W114, W115 enthusiast website.
http://www.stroke8.org

http://www.w108.org

Join the Mercedes W108 group
http://autos.groups.yahoo.com/group/mercedesw108/

My 280SL restoration

http://www.w108.org/gallery/albums/a...0959.thumb.jpg
Reply With Quote
  #13  
Old 02-28-2007, 07:25 AM
Wodnek's Avatar
Vintage Mercedes Junkie
 
Join Date: Jun 2004
Location: Southeast Wisconsin
Posts: 1,658
Quote:
Originally Posted by alabbasi View Post
Ken

You can drop that 350 from your roadmaster into it and scare the crap out of many M-100 owners :-).

All the best
I wouldnt want it to be faster than my 6.9 now, would I?
__________________
1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12
1982 380SL
1978 450 SEL 6.9 euro restoration at 63% and climbing
1987 300 D
2005 CDI European Delivery
1995 E300D Handed down to daughter
2006 CDI Wifes

Reply With Quote
  #14  
Old 02-28-2007, 07:31 AM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 32,474
Quote:
Originally Posted by JMURiz View Post
Same here, that sounds like a good upgrade if it works...don't you think it'll need new cams to get the most out of it?

Wonder what model Edelbrock Q-jet carb is the equivalent.
some years back i converted a bmw 3.0 liter to a q jet. i found that the jets for a '67 pontiac sprint worked very well. (it was a straight six ohc engine). it sounds counterintuitive but the jets you want are the most rich (the sprint ones). the smaller engine doesn't have as much vacuum to pull and the richer jets will provide the correct mixture.

good luck.

if converting a mb six i would use the edelbrock q jet replacement carb.

tom w
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual. It still needs upholstery redone...I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 03:43 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page