650 speed demon issue
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Joined: Aug 2001
Posts: 303
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From: New york
Car: 87 IROC Z "ZZ4"
Engine: 350 "ZZ4"
Transmission: ck performance th400 3000 stall
Axle/Gears: 3:73 10 bolt
650 speed demon issue
Has anyone ever experienced a bit of gas coming out of the full manifold port on the speed demon carb? not alot but enough that when i pull the vaccum cap of it's wet.
the floats seem ok maybe a tade low but defiantly not high
the floats seem ok maybe a tade low but defiantly not high
Supreme Member
Joined: Mar 2005
Posts: 1,121
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From: Spicer, MN
Car: '83 Berli, '84 Berli, '84 Z28 HO
Engine: L69, LG4, L69
Transmission: TH700-R4, TH700-R4, T-5
Axle/Gears: 3.08, 3.08, 3.73 Posi
perhaps there is a bad gasket or o-ring in it allowing gas to seep between the mettering block(s)?
Junior Member
Joined: Nov 2005
Posts: 27
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From: anchorage, AK
Car: 1985 firebird s/e
Engine: 388ci stroker
Transmission: stock, t-5?
i have the same carb and when i got it the only problem i had at first was the fuel viewer leaked but only till it preasureized then it stopped leaking..id agree either bad gasket or o-ring..call the guys as demon and tell em bout it and see what they have to say....if you already havent taken care of the problem
Supreme Member

Joined: May 2001
Posts: 2,009
Likes: 5
From: Pitman, NJ
Car: '89 IROC-Z
Engine: Canfield 195 headed 358ci
Transmission: TH350, Art Carr 9.5"
Axle/Gears: 3.92 Dana 44
Somethings wrong with it... Take off the fuel bowls and metering blocks and replace those horribly crappy red gaskets with the blue Holley non-stick ones. Problem solved, forever.
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