Idle solenoid for speed demon

survey_mike · Apr 4, 2023

I need to find an idle solenoid bracket for my Speed Demon 850 vac sec. carb. on my '70 Chevelle 502/502 BB. I ran a TH-400 for many
years and didn't need a solenoid but recently installed a 5 speed Tremec TKX. When the A/C comes on the engine dies unless I have
the idle set very high. Neither Holley bracket, 20-9 or 20-47 will work with their #46-74 solenoid. Those brackets are for the 4150 & 4160.
Both brackets interfere with the throttle linkage and don't place the solenoid correctly. I have the solenoid, I need the right bracket to fit
it to the Demon.
Thanks, Mike

Peewee0413 · Apr 4, 2023

Check out this page from Summit Racing https://www.summitracing.com/parts/dem-1950

No idea..

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survey_mike · Apr 5, 2023

Thank you Peewee0413, but I don't think Summit's bracket will work. The Speed Demon is an older carb which was discontinued years ago. The newer
Demons are completely different. I need a bracket where the mounting bolt holes are parallel to the solenoid. The Summit ones are perpendicular.

Bob Tiley · Apr 5, 2023

You will probably need to fabricate something.

survey_mike · Apr 5, 2023

Thanks Bob, you're probably right.

LevonH said:
Maybe 1 here:

Pardon Our Interruption...

Thank you for the suggestion Levon. I looked through the ebay listings and didn't see anything that looked close.
The Holley website still has a few Barry Grant things leftover but also nothing close to what I need.
I'll have to use the two I have to make one that'll work.

LevonH · Apr 5, 2023

Maybe 1 here:

Pardon Our Interruption...

Idle solenoid for speed demon

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