I observed that Redline uses a prism-shape below the carburetor, which apparently helps direct the mixture towards cylinders 1 & 6. The angle of the prism is about 60 degrees?

I will attempt to duplicate their design on a Fortal, 0.980" thick, ground aluminum plate. I probably should tap the plate for carburetor studs; lot less chance of loose bolts entering the intake.

The Weber and the aluminum plate won't arrive until early next week.

I will keep you posted on the $250 conversion. If anyone can share their knowledge, I am all ears.

Attached Thumbnails

 

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1970 280S M130 engine- good runner
1971 250 M130 engine- #2 rod bearing, gone
1971 280SE (blown engine,parts car)
1977 German 280S W116-only 33 years old

I have the Fortal, 0.980" aluminum plate drilled for mounting and recessed for the Weber carb. I used the base of the Solex carb for a pattern.
Seems straightforward so far, still not sure if I will have clearance for a Weber air filter.

I will post next weekend, after I drill the holes for the venturi (1-1/2" each).

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1970 280S M130 engine- good runner
1971 250 M130 engine- #2 rod bearing, gone
1971 280SE (blown engine,parts car)
1977 German 280S W116-only 33 years old

Well, it took a dozen hours to fabricate the plate. I used carbide milling bits with a slow speed die grinder for the recesses.
It would have been easier, and less time consuming, with an X Y compound table for my drill press, but the holes (and studs) pattern were acceptable. Aluminum plate is mounted on manifold; however the throttle linkage looks a bit challenging.

I'll post another update when I get the linkage sorted out.

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1970 280S M130 engine- good runner
1971 250 M130 engine- #2 rod bearing, gone
1971 280SE (blown engine,parts car)
1977 German 280S W116-only 33 years old

It looks interesting.

Good luck.

Tom W

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[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.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

Dan Penoff felt that the key to success for the throttle linkage was a little ball stud that had a male threaded rod at its end. I updated a different thread with that part number. -CTH

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- cth350@gmail.com
http://www.111lakeside.com/

I am retaining parts fom the original linkage, but this is turning into many hours of work. (should've bought the Redline kit

The Weber carb needs a transverse motion to activate the linkage, but the original linkage has a vertical motion. I have a solution, but more MIG welding is required. I guess I am paying myself $10.00 an hour, since I estimate completion in 30 hours.

P.S. I am using .38 Special shell casings for bushings, to replace the worn Mercedes nylon bushings.

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1970 280S M130 engine- good runner
1971 250 M130 engine- #2 rod bearing, gone
1971 280SE (blown engine,parts car)
1977 German 280S W116-only 33 years old

But, the 'throw' for the Weber carb doesn't translate to the Mercedes 'throw'.
I used a longer arm on the Weber, and a short one on the Mercedes linkage shaft.
But I think at 2/3 Mercedes pedal throw I will be fully opened on the Weber carb. What an array of issues!
I'll post again when I have it sorted out, but the Redline Kit is the best solution. So far, I've used a Mig welder, Drill Press, Die Grinder, Die (to shorten ball cup linkage) and of course, the .38 Special brass bushings.

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1970 280S M130 engine- good runner
1971 250 M130 engine- #2 rod bearing, gone
1971 280SE (blown engine,parts car)
1977 German 280S W116-only 33 years old