Ryan77

I just ordered a Speed Demon 750 with mechanical secondaries and no choke. This is what Lars and several other people recommended to me. It will be going on my 525hp 383 from AR Racing. So you guys who already have Demons, what do think of them and do have any tips on running them? I also ordered the book "How to Tune and Win with Demon Carburetors" also so that I can get it pretty well setup before I dyno tune it :cheers:


[Modified by Ryan77, 2:20 PM 7/20/2003]

Corey_68

You did order a fuel log to go with it correct? The reason I ask is I learned the hard way it takes a special fuel log, a Holley log will not work.

I haven't fired up mine yet but the people I know who has a Demon love them. :cheers:

AGVI

I have the impression that demon carbs are only for higher HP cars is this true? I tend to see them on such cars and was just curious as to whether it's true or not...

Ryan77

A fuel log :confused: I'm not quite sure what you mean.

Alwyn678

I really like my Speed Demon 650. It was pretty much tuned straight out of the box just some minor tweaks and it has performed flawlessly....Much more responsive than the edelbrock or quadrajet or holley that I was running

Corey_68

Ryan77

Thanks Corey, do you happen to have the part number?

LFZ

i know Alwyn and some others will disagree with me ;) but Demon carbs in my opinion are terrible. just my .02 and my personal experience with demons. :mad

69vette66

I you are not running a electric fuel pump you can use the same setup I made for mine. I am using a holley mechanical fuel pump.
I have no problems with this setup.
:cheers: Larry


[Modified by 69vette66, 9:02 PM 7/20/2003]

70PurpleLS7

I gotta agree... I'll take a Holley HP series carb over a Demon any day of the week.

LFZ

THANK YOU! THANK YOU! finally someone on my side :cheers:

LAvetteman

I have had a Holley and now have a Demon. The holley makes a nice work bench ornament. Barry Grant takes the design of the fairly good holley carb and makes many refinements in their workmanship over holley.

But hey, somebody has to like holleys. For those who prefer holleys over demons I am sure there is a holley employee or two thanking you right now. :)

As for Demons being more for race, not true. Like I said, IMO demons are better built and are more tuner friendly with features like 4 corner idle circuit screws and float level sight glasses.

Corey_68

Ryan, they offer several styles, but the one you should need is # 170021.
http://www.barrygrant.com/bgfuel/default.aspx?page=52

70PurpleLS7

As your paying for all the advertising BG has to do for his carbs eh?

LAvetteman

:lol: Do they advertise alot??? Sorry, never noticed. If they do they should save thier coins, word of mouth is selling thier carbs IMO. :)

gkull

Mine was rich out of the box. I now have 76/81 jets 6.5 power valve. Idle was rich so I drilled an 1/8th inch hole in each primary throttle blade. I drilled out the squirters for a bigger faster shot.

Look back a week or two I posted some pictures of my fuel log from Earls with all 8-AN fittings.


[Modified by gkull, 2:14 PM 7/21/2003]

Ryan77

[quote]I you are not running a electric fuel pump you can use the same setup I made for mine. I am using a holley mechanical fuel pump.
I have no problems with this setup.
Larry
I'm running a 110 gph Holley mechanical pump, but your pic ins't coming up so I don't know what you're running :confused:


[Modified by Ryan77, 3:48 PM 7/21/2003]


[Modified by Ryan77, 3:50 PM 7/21/2003]

gearheadz

Not true....they make a full line for different power/use vehicles. Road Demons are for stock/mild, Speed Demons are for street & strip, Mighty Demons are for race.

IMO BG carbs are much higher quality & better designed than comparable Holleys.


[Modified by mdsmith, 4:06 PM 7/21/2003]

Ryan77

Anyone have pics of a Demon hooked up to the mechanical pump :confused:

Jason Staley

Love both my Demons.

I'm running an 825 RS on my big block Oldsmobile (this one is actually a BG Gold Claw - predicesor to the demon) and a 650 Mech. Secondary Demon on my ZZ4 in my 76'. Both ran great right out of the box. I'm still working on fine tuning the one on my ZZ4, just put it on a few months ago. The idle circuit is too rich for a street car - bad gas mileage when running at idle and cruise, but it does make nice horsepower. I gained 5 mph in the 1/4 mile, when I swapped from my 750 Double Pumper Holley to it. Hey, and it drives better too :). Currenlty I'm running 72/83 jets in mine.

:cheers:

http://temp.corvetteforum.net/c3/greatwhite/