Author Topic: Device (constant Speed Solenoid) on intake. Why is it there ?  (Read 2286 times)

Pinder

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I have always wondered why on my car which is  a 4 speed manual there is this device on my intake that is not wired and does nothing. I think it is for automatics. why is it there on my 1970? maybe this is a replaced intake? or maybe this is just how they installed it for both manual and automatic in 1970? thoughts on this?

Regards
 
  Pinder
1970 280 SL Light Ivory DB 670. 4 Speed manual shift no AC Limited Slip Diff.

ja17

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Re: Device (constant Speed Solenoid) on intake. Why is it there ?
« Reply #1 on: August 04, 2022, 04:44:09 »
I have seen other pagodas which came from the factory with these constant speed solenoids never wired and never meant to be used.
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
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1965 220SE Finback

Cees Klumper

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Re: Device (constant Speed Solenoid) on intake. Why is it there ?
« Reply #2 on: August 04, 2022, 05:23:11 »
Was it not also used on A/C equipped cars? I suppose your car does not have A/C though, or not anymore.
Either way it's somewhat valuable these days, Authentic Classics selling it for almost $1,300.
Cees Klumper
1969 Mercedes 280 SL automatic
1968 Ford Mustang 302 V8
1961 Alfa Romeo Giulietta Sprint Coupe 1600
1962 FIAT 1500S OSCA convertible
1972 Lancia Fulvia Coupe 1.3
1983 Porsche 944 2.5
1990 Ford Bronco II

Jonny B

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Re: Device (constant Speed Solenoid) on intake. Why is it there ?
« Reply #3 on: August 04, 2022, 15:17:14 »
I agree with Cees. My 1970 (automatic, no A/C) has the solenoid and it is not wired in.
Jonny B
1967 250 SL Auto, DB 568
1970 280 SL Auto, DB 904
1966 Morris Mini Minor

Mike Hughes

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Re: Device (constant Speed Solenoid) on intake. Why is it there ?
« Reply #4 on: August 04, 2022, 16:09:24 »
I would venture a guess that, in an age when it was NOT a $1300 part, this might have been included in what might be termed a "USA" or "North American" spec package as it became clear that dealers were adding A/C to 280SLs with increasing frequency.
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Pinder

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Re: Device (constant Speed Solenoid) on intake. Why is it there ?
« Reply #5 on: August 05, 2022, 16:29:06 »
Thats great information. I confirm mine has no AC and is a stick shift. I did power it up and it does work!
1970 280 SL Light Ivory DB 670. 4 Speed manual shift no AC Limited Slip Diff.