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new Street Demon carb? |
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dbomb
AMC Addicted Joined: Jul/22/2012 Location: new jersey Status: Offline Points: 705 |
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We were running some small and big block modifieds at speedways around central jersey and pa in late 90s and some nights we would dump the big holley gasoline carb and run an older caddy/Olds type Quadrajet and did very very well with it to the point that some folks complained . It just pulled out of the corners really well and on restarts was very very snappy espescially with a heavy track . I know this post about StreetDemon Thermoquad type carbs on street but QJet kinda in same category. One guy Richie Cass ran one of those ToiletBowl carbs and he loved it.
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rebuiling 73 amx need parts
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jeremy0711
AMC Addicted Joined: Dec/12/2008 Location: Southern IN Status: Offline Points: 1547 |
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A demon is no better than a Holley. You are limited on the adjustability without drilling and so forth that carries an extensive knowledge. Why not just buy a carb that has all the adjustability with a turn of a screwdriver instead of a drill for the same price.
Quick Fuel and Proform.... |
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Sonic Silver
Supporter of TheAMCForum Joined: Nov/23/2011 Location: East Tennessee Status: Online Points: 7904 |
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jeremy0711
AMC Addicted Joined: Dec/12/2008 Location: Southern IN Status: Offline Points: 1547 |
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Exactly the first two words do say...A demon.... My description of the carbs might not have said that the new demon is a bowl type as we already know anyways...which is not an ideal carb for fine tuning but more for the less inclined to tune a carb. It most likely will be classified as a daily driver carb as the Edel carbs are. If the new Demons are as hard to tune as the old ones then most will be putting them on the shelves too and buying something else. I bet the sales are slow as BG had a BAD reputation with the old style. I had a few unpleasant conversations with the well known tech from BG. I had a few of the older carbs and they ran well but I have found a lot of aluminum shavings in them and buried in the gaskets that the infamous tech denied. |
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Sonic Silver
Supporter of TheAMCForum Joined: Nov/23/2011 Location: East Tennessee Status: Online Points: 7904 |
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All the other new Demons( EXCEPT the Street Demon ), are Holley based like the old Demons. |
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uncljohn
AMC Addicted Joined: Jan/03/2013 Location: Peoria AZ Status: Offline Points: 5394 |
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Here is a write up from CarCraft on them, it reads well. An yes it does seem to represent a Carter or Edelbrock AVS bu then again what is wrong with that. I've spent time tuning AFB's and they tune well, this should be not a whole bunch different. But I build and drive them on the street and this looks like a good option.
I've never liked the street manners of a Holley anyways. |
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70 390 5spd Donohue
74 Hornet In restoration 76 Hornet, 5.7L Mercury Marine Power 80 Fuel Injected I6 Spirit 74 232 I-6, 4bbl, 270HL Isky Cam |
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Rogue401
AMC Addicted Joined: Nov/26/2010 Location: New York Status: Offline Points: 1279 |
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I have thought about two 390 CFM Holleys. I love the looks of the big Fords with two Holleys and I have always had good luck tuning them, but even if they do fit on the Offy 2x4 manifold, you'd have to pull at least the rear one to change jets, etc. They're a pain with only one of them. I doubt the Quick Fuel or Proform would fit at all with the larger float bowls and I think both are Chinese. I'll park it before I'll run a Chinese carb. Quick Fuel says "assembled" in the USA. That's not a good sign...
The Speed Demon has a lot off advantages in this application because it looks like two will fit, it's easy to tune on the car, I like the small primaries and the throttle linkage is already set up for my 200R4 TV cable. I'm just hesitant because it's new and the past bad rep. But I'm still leaning that way. My other idea is to adapt a tri-power Holley set-up like somebody else on the form has done to a 401 Rambler wagon. Has anybody heard any more about that? If I did it, I would use an edelbrock performer instead of the Offy 2x4 manifold. Thanks for the thoughts, guys
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jeremy0711
AMC Addicted Joined: Dec/12/2008 Location: Southern IN Status: Offline Points: 1547 |
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Quick Fuel is made in Bowling Green, KY if that helps your decision any. All processes are done in house. They will even custom tune a new or used Holley or Quick Fuel for you. Their tech service is great and very polite and with a short wait time. The bowl type carbs are nice as you can work on them on your car and not have to worry about spilling gas everywhere. My last Quick Fuel even had the quick change bowls and that doesn't help with the gas mess either. FYI...Edel carbs don't have as much power as the Holleys, old BGs, quick Fuels, and Proforms. You will notice a big difference going from and Edel to another brand of the same size. I don't know if the newer Demons will operate the same as an Edel since it is close in resemblance. |
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Sonic Silver
Supporter of TheAMCForum Joined: Nov/23/2011 Location: East Tennessee Status: Online Points: 7904 |
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I am glad that you have noticed the big power increases in Holleys. I have had Carter AFB, AVS, and Thermoquad, various Holleys, Rochester Quadrajets, Edelbrock, Autolite 4100 and 4300, Summit, etc. I have failed to notice the big increase that you have. If the carb is set up for the combination, I am not so sure that brand makes that much difference on the street.
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nda racer
AMC Addicted Joined: Nov/28/2009 Location: Ohio Status: Offline Points: 2584 |
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I went from a Eddy 600 (AFB) to a Holley 600 DP and went 3/10s faster.
72 307, SP2P, exhaust manifolds, 2" pipe, auto, stock stall, 2.56 gears. 15.9 to 15.6. Bracket car. No DA fluke. A buddy bought a 750 Carter off of me, went 11.3. Put a 850 DP on and went 10.7. At that power level that says a lot. Edited by nda racer - Feb/12/2014 at 7:16pm |
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