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Mercedes-Benz 300 SLR


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#26 Bill from NH

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Posted 29 May 2016 - 10:07 PM

Just a poor bleach job? :sarcastic_hand:


Bill Fernald
 

How old should a highway be before you tell it, that it has been adopted?





#27 Pablo

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Posted 30 May 2016 - 09:06 PM

Progress report:

-DUBRO bracket trued, braced, and duffied.

-Tongue is a Cobra/Chicagoland brass/steel sandwich.

-Chunk is .050 and will be trimmed with a taper to form fit between the center rails.

 

IMG_1937.JPG

 


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#28 Bill from NH

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Posted 30 May 2016 - 10:48 PM

I've never seen these motor brackets used on a chassis that was labeled DUBRO. Someone once posted they were made by another Cali company, but DUBRO is a popular name used for them. I forget who made that post, where it was made, or what company it named. It might have been a company associated with Associated. I've always called these brackets a REHCO AML 3000, but I know REHCO had nothing to do with their manufacturing.

 

You must have laid in a good supply of duffies. :good:


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How old should a highway be before you tell it, that it has been adopted?


#29 Pablo

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Posted 31 May 2016 - 06:22 AM

I have one pair left after this. When they're gone, that's it, back to cutting tubes :)


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#30 Pablo

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Posted 31 May 2016 - 11:08 AM

Center section - Cobra .050" brass tongue on the bottom:

 

IMG_1949.JPG

 

Doubled with an .032" steel piece up top:

 

IMG_1961.JPG


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#31 Pablo

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Posted 31 May 2016 - 02:50 PM

Don't know if it makes the car handle any better, but since I started checking my rails for straightness it makes a better build.

Everything lays nice and flat on the block like it should. I cut the bad spots out of the ones that fail inspection and use them for "whatever".

 

IMG_1964.JPG

 


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#32 Pablo

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Posted 01 June 2016 - 10:29 AM

Center section complete, twin .063" wire rails:

 

IMG_1969.JPG


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#33 Pablo

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Posted 01 June 2016 - 06:18 PM

Can paint turned out nice. VHT directions said 3 coats 10 minutes apart, followed by a 200 degree bake for 1 hour.

Final motor assembly with new, pre-radiused Mura 36D brushes and new ProSlot Speed FX springs:

 

IMG_1984.JPG

 

Draws 1.4 amps at 3 volts, very smooth, sounds like a good PS 4002B :)

 

IMG_1996.JPG

 

 


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#34 Pablo

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Posted 02 June 2016 - 04:59 PM

Ready for an overnight tumble:

 

IMG_1999.JPG


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#35 Pablo

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Posted 03 June 2016 - 08:14 AM

Nice n shiny:

 

IMG_2009.JPG

 

IMG_2011.JPG

 

Ball bearings n duffies. ISO hinge pivots are brass on brass at the ends using .063 retainers.

 

IMG_2020.JPG

 

Outer section lift is only about 20 thou - that's all she needs:

 

IMG_2022.JPG

 

IMG_2026.JPG

 

Short pieces of .039 wire stiffen and strengthen bracket face area:

 

IMG_2027.JPG


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#36 C. J. Bupgoo

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Posted 03 June 2016 - 01:43 PM

      :on_the_quiet2:          :love:        :sarcastic_hand:


Michael G. Sutlick
 
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                                                                          Buford T. Tesla, (c. 1927)

#37 bluecars

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Posted 03 June 2016 - 03:08 PM

SWEET!!! :good:


Robert "Red" Valantine :diablo: 


#38 Pablo

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Posted 03 June 2016 - 04:39 PM

Thanks, guys :)  Track test tomorrow.

 

IMG_2034.JPG

 

I don't want to punch holes in the Mercedes body yet, so I mounted a Cucaracha test body of similar WB and width:

 

IMG_2044.JPG

 

 


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#39 Samiam

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Posted 03 June 2016 - 05:55 PM

WOW!

 

Super cool build Pablo. :good:

 

And a unique motor that makes use of one of those homeless Puppies. :victory:


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#40 Pablo

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Posted 04 June 2016 - 10:54 PM

Thanks, Sam, "homeless Puppies" is a good observation. A perfectly good arm is now very snug in it's new vintage home :)

 

Today's track test results:

-Great handler. She prefers to slide rather than tilt - overcook a turn, it simply drifts more. I ran it about 30 laps and never deslotted.

I was impressed by how nice an ISO car, even with fixed body mounts, can handle.

-Power is perfect for the car, and the motor was dead cool after the test (12.5 volts).

-Plenty of brakes; I had my Third Eye brake setting about midway and it was perfect.

-Gearing was fine.

 

This was with a junk practice body and non-independent front wheels. With free fronts and the Mercedes Benz 300 SLR body it can only get better :)

Post-test inspection to follow....


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#41 Pablo

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Posted 05 June 2016 - 04:06 PM

Never let it be said I over-hype my vintage car track tests :)  I found a few flaws in my post-test inspection of the Mercedes.

I'm a newbie at arm dye application, and I see bare spots on the lams. No, the arm isn't contacting the mags. Simply a matter of a newbie paint job.

I'm sure there are tricks to it I have yet to learn. I can touch those bare spots up, but they may re-appear.

 

IMG_2092.JPG

 

Koford drilled flag nut was for testing only. Waiting for a standard brass nut to arrive.

 

IMG_2098.JPG

 

Donuts were sold to me as "Alpha Double Treated" but they cupped faster than a corn tortilla in hot oil after I trued them.

 

IMG_2113.JPG

 

Looking at the huge pores in the rubber, I realize they are a far cry from the rubber on factory wheels.

Crap like that doesn't leave The Wolcott Ranch unless it's in a Hefty trash bag :)

I'll remove them and replace with Alpha Wonder.

 

IMG_2111.JPG

 

Gears performed perfectly and show zero wear.

 

IMG_2094.JPG

 

No other problems found; the car barely even got dirty :good:


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#42 James Wendel

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Posted 05 June 2016 - 05:41 PM

I will be curious to see the effect on the sweet handling when you toss those funky rear tires for something better.


You can't always get what you want...

#43 Pablo

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Posted 06 June 2016 - 06:04 AM

Better, if anything, but not much change, I expect. I am sure wonders will last much longer.

These probably would start chunking in about 10 more laps.

 

Yoda suggested just leaving the La Cucaracha body on it, and we had to practically pry it from his paws :)

 

post-1512-0-68133600-1465162200.jpg


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#44 bluecars

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Posted 06 June 2016 - 03:06 PM

That's what I call a real TOYYODA. Was it made in Japan??? :sarcastic_hand: :sarcastic_hand: :sarcastic_hand: Car really is sweet :good: :good: :good:


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#45 C. J. Bupgoo

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Posted 06 June 2016 - 03:27 PM

      :mosking:  :rolleyes:  :acute:   


Michael G. Sutlick
 
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                                                                          Buford T. Tesla, (c. 1927)

#46 Pablo

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Posted 07 June 2016 - 11:42 AM

A very short piece of tubing soldered to the front axle inboard of the knockoff produces a free-wheeling right hand wheel.

The left side will be set screwed and spin the axle in the tube.

 

IMG_2118.JPG


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#47 Half Fast

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Posted 07 June 2016 - 02:04 PM

Very nice!

 

I love the appearance of the converging/diverging rails :hi:

 

Cheers


Bill Botjer

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#48 Pablo

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Posted 08 June 2016 - 10:22 AM

Thanks, Bill :) Influenced by the works of Bob Suzuki (endbelldrive) and many others, of course :good:

The car is done and ready for the body.

 

IMG_2136.JPG

 

A couple dots of touch up paint around the gimbal:

 

IMG_2143.JPG

 

Rears:

 

IMG_2150.JPG

 

Independent fronts have about 1/16" side to side slop:

 

IMG_2151.JPG

 

IMG_2156.JPG


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#49 Don Weaver

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Posted 08 June 2016 - 12:45 PM

Looking goooood!  The motor paint is fantastic.....

 

Don


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#50 Pablo

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Posted 10 June 2016 - 08:32 PM

Thanks, Don :)  I think the body paint turned out nice also, but y'all can be the judge.

 

IMG_2205.JPG

 

IMG_2215.JPG

 

Decals are all inside, except for the license plate flag, numbers, and little red dot German inspection sticker:

 

IMG_2210.JPG


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