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Thread: Demon Drama
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04-10-2005 #1
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Demon Drama
man...what a week it has been!! got my motor finally fired up in my car...and during the intial cam break in.....the carb was leaning out so I fattened it up a bit. After the cam was broken in...it was running rich...so I leaned it out....then it was running very very poor....so after many nights tuning and re-jetting...turns out the base set up (jets and power valve) that it came with out of the box is the best combo....just cant mess with a good thing i guess!! oh i have a speed demon 650..vac. sec., and an elec choke.
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04-11-2005 #2
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Glad to here that you got it running better, did you end up with the 70-78 jets and 6.5 pv?. Have you tried putting an air cleaner on yet? I had to modify mine to fit around the air horn / linkage.
Mike
1975 Camaro
C5 Corvette
04-11-2005 #3
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yes...70-78 and the 6.5 PV....I got a "flat base" air cleaner bottom that fit around the linkage...works awesome!! since your in MD as well...I got it at Speed Unlimited. go see Dale there..he should hook you up.
04-30-2005 #4
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well I finally found out what was wrong with my carb problem....the stupid timing moved out 8 degress...THAT WILL DO IT. I set it back the way I had it and man does she fly now...I mean night and day difference...no hesitation at all.....she smokes the tires at 60mph if I stomp on it!!!!
05-01-2005 #5
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The Demon seems to run rich at idle what ever you do, I'm also running 70-78
Dave H.
05-01-2005 #6
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Hhhmmm...Maybe thats why Summit is no longer selling Demon carbs.
Andrew1970 GTO Version 3.0
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05-01-2005 #7
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I noticed that...it does run rich...and ive been tuning it for the last 3 weeks....oh well..better rich than lean
05-05-2005 #8
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I've heard the same, my friend had one on a older GT, and he hated it, he wanted a Holley!
Steve68- 1968 Camaro SS LSX T56, 12bolt 3:90's, 18" Fikse Profil 13s, Deep Fathom Green paint, Spearcos, just bunch of old junk because another member said so, LOL
70 Nova SS street/drag 454, T400, 3:55, ugly!
05-08-2005 #9
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Ive got one on my BBC and its rich at idel. its an 850. havent gotten to drive it yet so i dont know hoe it is at speed. anyways better a little on the rich side then on the lean side
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