This Demon any good?

[koosh]

Car runs fine (once warmed up), theres no choke....after a ride, pull into the garage, and shut off, continuously smell raw fuel? NO leaks anywhere, but the smell is strong for an hour or so after shutting off? Is carb messed up? Demons any good?

Is the Edelbroch manifold an issue?
Thanks as always for any help.....

 

[Photon440]

Percolation? What's the fuel level in the sight glass? Demon is a Holley product now, they might have some help.

 

[koosh]

Percolation? What's the fuel level in the sight glass? Demon is a Holley product, they might have some help.

Looks like the site glassses are near full?

 

[Ironbuilt]

Sounds like the float level might be off, not fully seating.

 

[Photon440]

Looks like the site glassses are near full?

If you have the sight glass with three lines, it should be adjusted to the lowest line for street use. You might benefit from a heat insulating spacer as well.

 

[koosh]

If you have the sight glass with three lines, it should be adjusted to the lowest line for street use. You might benefit from a heat insulating spacer as well.

Spacer? Do i look for a demon spacer or edelbroch? (manifold)
Lol.....i dont even know what carb i have!
If anyone knows what heat spacer i should buy, would appreciate it!

 

[Photon440]

Before you get one, make sure that a bit of extra height won't cause problems.
As for brand, it won't matter which spacer if it's a common square bore. Demon, Holley, Edelbrock, Mr. Gasket... Just an example: https://www.amazon.com/Mr-Gasket-3404-Insulating-Carburetor/dp/B00068OOHQ
Don't use an aluminum spacer, it won't insulate.

 

[koosh]

Before you get one, make sure that a bit of extra height won't cause problems.
As for brand, it won't matter which spacer if it's a common square bore. Demon, Holley, Edelbrock, Mr. Gasket... Just an example: https://www.amazon.com/Mr-Gasket-3404-Insulating-Carburetor/dp/B00068OOHQ
Don't use an aluminum spacer, it won't insulate.

Ok...will check extra inch in height clearance. This one will fit my carb and intake?

 

[PurpleBeeper]

Ok...will check extra inch in height clearance. This one will fit my carb and intake?

Yes, that spacer will fit your carb/intake & "phenolic" is the type you want to insulate the carburetor (& its fuel) from the heat of the intake/engine.

As Photon mentioned, check the fuel in those site glass windows on the side of the carburetor too. You adjust the front/rear floats (which adjusts fuel level in those site glasses) with a 5/8" wrench & a big flat-head screwdriver. The big screws adjust the fuel level up/down & the 5/8" lock nut holds the screws in place once adjusted. You might want to have a couple sets (one for front & back) of "needle & seat gaskets" since they can sometimes leak after you adjust them. They are two small circle gaskets. One goes under the nut & the other above the nut under the screw. It sort of works like the back of a toilet....float goes up & water shuts off....float goes down & water comes in. You will be adjusting the height of the float front/back. Demon carburetors are basically race versions of Holley carburetors, so use Holley gaskets.
'
From what you describe, either your floats are a little bit high OR fuel is boiling inside the carburetor (why you'd want to insulate it from heat with a phenolic spacer).... I'd bet on boiling fuel, but that's a guess. These guys are giving you good advice & you can fix it for maybe $30 tops.

 

[493 Mike]

P.B. is basically correct except the large screw is the lock and the nut is the float adjustment. If you just "crack" the screw loose you can turn the nut/screw assembly up and down with the engine running and not squirt fuel from the adjustment assy. Clockwise will lower the fuel level and vise versa.
Mike

 

[koosh]

Looks like 1" thick may be too much... i stuck a piece of 1" foam with piece of tape on top, closed hood, and foam was stuck on the hood.....maybe theres a 1/2" spacer?

 

[Photon440]

The link I supplied was for a 1/2" spacer.

 

[koosh]

The link I supplied was for a 1/2" spacer.

U may wanna check it...says " 1" thick"

 

[koosh]

and how do i know which 1/2 to buy? I dont see a model number on my carb, and not sure of the bore size of the 4 holes?

 

[Photon440]

U may wanna check it...says " 1" thick"

Sorry, was reading the specs at the bottom of the page for a different link: https://www.amazon.com/Edelbrock-87...rd_wg=PhLb5&psc=1&refRID=Q5YADC2BYG5P15DW95DE

 

[koosh]

Sorry, was reading the specs at the bottom of the page for a different link: https://www.amazon.com/Edelbrock-87...rd_wg=PhLb5&psc=1&refRID=Q5YADC2BYG5P15DW95DE

Wow....never knew these came in wood? Any difference regarding the phenolic?

 

[koosh]

What about this:
https://www.amazon.com/dp/B01H10KZ0...olid=1K2ELZU0O5G7V&psc=0&ref_=lv_ov_lig_dp_it
Will this fit my carb and intake?

 

[Photon440]

What about this:
https://www.amazon.com/dp/B01H10KZ0...olid=1K2ELZU0O5G7V&psc=0&ref_=lv_ov_lig_dp_it
Will this fit my carb and intake?

Yes, that should fit.

Wow....never knew these came in wood? Any difference regarding the phenolic?

We used to make our own out of plywood, they worked fine. The wood has very good heat insulating properties, while the phenolic material is also a good insulator plus has similar expansion as aluminum to match your manifold. I'd go with the plastic one.

 

[Cranky]

Wood has been used for years. Cheap and just about anyone can make one with some decent wood working tools/skills but someone with a milling machine can do an even better job. Wood is usually a quick and easy way to make several different thicknesses for test and tuning without spending much money. I used to hit the swap meets and if I saw a spacer for cheap, I usually bought it but they were usually always made from aluminum.

 

[koosh]

Well...guys once again, this forum solves another issue....thanks to all, once carb spacer went in, I'm not getting those fumes any more.....thanks!