King Lear

I have the Mighty Demon 750 annular carb on my 383 just wondered if anyone tried this one yet?

http://store.summitracing.com/partde...5&autoview=sku

Gordonm

What is the advantage of dominator style vs the standard style. Do you like the annualr boosters on the Might Demon?

Cory1970

What cam is in your 383? The Mighty Demon is made for cams with 240 or above durration at .050.

King Lear

Oh yeah, I think it was the best carb decision I ever did was going from the down legs to the annulars, much snappier response then the Speed Demon 750 down leg or the Quick Fuel Q-750 down leg carbs.

Really I have no idea the advantage of the Dominator style over the standard other then your intake & air cleaner choices get a lot harder or you will have to put a bunch of adapters everywhere. I really doubt for street driving their would be much advantage that is why I asked the question if anyone has done it.

King Lear

I have a Crane H. R. that is at about 225/233 duration @.050 .543/.563 lift with a 107 ICL and a 112 LSA 1.6 RR, 10.5:1 CR, RHS Pro Action Alum 200cc heads.
I was debating between the Speed Demon 750 mech sec annular booster and the Mighty Demon 750 VC sec annular booster.
Without a doubt the Mighty Demon VC sec carb has run better on my car then any of the other Holley, Edelbrock, Quick Fuel(close second), and Speed Demon's and both vacuum and mech sec. Also once I re-gear to 3.90 or 4.10 in the next year or so I will probably bump the cam up as well and my carb will be still usable.

Scott Marzahl

I ran an old Holley Annular years ago, sweet carb. A lot of guys locally are now running the Proform 750s due to quality problems with the BG carbs. I'd take a look at those as well.

King Lear

I'm not looking to change carbs, I was just wondering if anyone was running the Holley 750 dominator on a 383. The only way I would switch from the Mighty Demon 750 annular is if Quick Fuel comes out with a 750 annular in the Q series. The machining and tunable options on the Quick Fuel metering blocks blow Demons quality away. All the emulsion & air fittings are screw in as opposed to drilling out the Demon metering block.

Scott Marzahl

Understood, mine was an old 4150 Dominator with annular discharge and it was on a 383 w/NOS.

Cory1970

What quality problems????

MotorHead

Shoulda got the Race Demon, all the fittings are there in the metering blocks on mine

As for the Dominator 750, can't really see any reason to run it unless you want to fool someone and tell them it's a 1150cfm on your L48

King Lear

Yeah, but I was hesitant to go with as big as the 750 Mighty Demon, I think the Race Demon would have been a bit much for my HR 383 with 3.36 gears and a TH400, however if you can tune, any carb can be made to run good in my opinion on anything.
I just watched your video, that engine sounds nice, I plan on doing the Keisler 5sp conversion in about 2 years then I will bump up the cam some more to get the benefit from it.

As far as the dominator 750 I think it is a gimmick, I would bet it doesn't produce any bigger numbers then a 4150 carb.

King Lear

I have heard a lot of people complaining about the machining and the throttle linkage. I went to Jegs about 2 years ago when I had my original 350 and went through a couple of boxes of Speed Demon 650 that the throttle plates were bent. The transfer slot hole would be right at .020 on one primary slot and .030 on the other primary slot(example, dont remember exact numbers).
The Mighty Demon I just put on had bent likage on it preventing the primaries from closing after WOT, but I just massaged it with some needle nose pliers to free up its range of motion so it didn't get hung up.
I think a lot of people buy them and have no idea how to tune them so they think they are bad and send em back.
Although a lot of race shops here in Ohio have dropped BG Demon products altogether because of the amount of returns they had.

Scott Marzahl

The other issue is machining debris in the carbs like metal filings, drill shavings, some holes aren't even drilled!

MotorHead

If you get a good one they are great