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Street Demon Carb #2673432
07/02/19 10:36 PM
07/02/19 10:36 PM
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Posts: 55
Long Island, New York
57Fury440 Offline OP
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Hi Guys. The Edelbrock #1406 on our 74 Barracuda is 25 years old and has been rebuilt a few times and seen better days. I am thinking about replacing it with a Street Demon #1901. The motor is a pretty stock 318 with a 340 intake manifold, 340 cam, lifters and springs with cast iron manifolds and duals. It has a torqueflite and 3:55 gears. Will this carb fit the stock Mopar manifold and air cleaner. Anyone here using this carb and how do you like it. Thanks for any input.

Re: Street Demon Carb [Re: 57Fury440] #2673445
07/02/19 11:15 PM
07/02/19 11:15 PM
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Lincoln Nebraska
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RapidRobert Offline
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I cant remember if it was the street demon or the street avenger that gets good reviews. I think any 500 cfm carterbrock will work fine for you.


live every 24 hour block of time like it's your last day on earth
Re: Street Demon Carb [Re: 57Fury440] #2673488
07/03/19 06:54 AM
07/03/19 06:54 AM
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Sniper Offline
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What stock intake? A 74 318 didn't come with a 4bbl so who knows what you have.

Here's a LINK to the install instructions

It does say "If installing the Street Demon™ on a factory cast iron spread bore style manifold, a spacer may be required for proper throttle opening."

If you have EGR you will probably need a spacer to clear, may be needed to clear the choke well as well. Though with today's gas it's probably needed regardless.

Or seeing as to how the 1406 you have lasted 25 years and it's already installed consider another one, still being made.

Re: Street Demon Carb [Re: Sniper] #2673495
07/03/19 07:18 AM
07/03/19 07:18 AM
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Lincoln Nebraska
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RapidRobert Offline
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Quote
Or seeing as to how the 1406 you have lasted 25 years and it's already installed consider another one, still being made.
A guy on FABO has 2 of em for sale seperately for reasonable money.


live every 24 hour block of time like it's your last day on earth
Re: Street Demon Carb [Re: 57Fury440] #2673504
07/03/19 08:03 AM
07/03/19 08:03 AM
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Benton, IL.
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DaveRS23 Offline
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The CarterBrocks are not bad carbs, but their calibrations are from a different generation and their design is over 50 years old with no real updates. Again, not a bad carb, but there are better choices today.

The Street Demon carbs are about the most recent design out there and have some design advances that offer real world advantages. Triple stack boosters, spread bore design, phenolic center, secondary air valve, calibration for today's fuel, etc.

I have used the CarterBrocks since the 70s and have been installing the Street Demons the last few years. There simply is no comparison between them, the new Street Demon is a better carb for us today. Frankly, I believe the only guys that would recommend an old CarterBrock over a new Street Demon is someone who had not ran any Street Demons.

There are lots of threads on this subject here on Moparts and plenty of reviews on the web. A search will bring a lot of info.

https://www.youtube.com/watch?v=YNAlVFtUFL4

https://www.hotrod.com/articles/street-demon-750-carb-review/


KOS
Re: Street Demon Carb [Re: DaveRS23] #2673505
07/03/19 08:08 AM
07/03/19 08:08 AM
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Sniper Offline
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Not interested in buying all the parts, jets, rods and such for yet another line of whizzbang carbs. If I ever get tired of the AFB design and want to go in a new direction, it won't be with another type of carb. I will just put a FiTech or Sniper on it. No need for tuning parts, or tuning for today's gas, or empty float bowls,

Re: Street Demon Carb [Re: Sniper] #2673522
07/03/19 08:54 AM
07/03/19 08:54 AM
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moparx Offline
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Originally Posted by Sniper
Not interested in buying all the parts, jets, rods and such for yet another line of whizzbang carbs. If I ever get tired of the AFB design and want to go in a new direction, it won't be with another type of carb. I will just put a FiTech or Sniper on it. No need for tuning parts, or tuning for today's gas, or empty float bowls,


me too ! i dearly LOVE the thermoquad, but hard to get parts for, except for rebuild kits, and i have a bunch of jets and metering rods.
in the future, i plan on a 2-4 setup, and it WILL be a fitech or sniper.
i still won't turn down Cheap carbs and parts though. biggrin
beer

Re: Street Demon Carb [Re: Sniper] #2673566
07/03/19 11:23 AM
07/03/19 11:23 AM
Joined: Dec 2007
Posts: 55
Long Island, New York
57Fury440 Offline OP
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57Fury440  Offline OP
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I said the motor is mostly stock. The manifold is off a 1970 340. The reason for asking is that there is a lot of new technology out there and I was interested in knowing if anyone tried the other carb I mentioned.

Re: Street Demon Carb [Re: 57Fury440] #2673602
07/03/19 01:01 PM
07/03/19 01:01 PM
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Sniper Offline
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Point is a 70 manifold is a squarebore one and you will need an adapter to fit the Speed Demon but no EGR valve to clash with the linkage, that's why telling us what you have is important.

Had it been a 73 340 intake then it would be a spread bore intake which should clear and you would have had EGR to deal with if it hadn't already been blanked off.

See how that works?

Re: Street Demon Carb [Re: Sniper] #2673652
07/03/19 02:43 PM
07/03/19 02:43 PM
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Scranton, PA
Montclaire Offline
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Originally Posted by Sniper
Point is a 70 manifold is a squarebore one and you will need an adapter to fit the Speed Demon but no EGR valve to clash with the linkage, that's why telling us what you have is important.

Had it been a 73 340 intake then it would be a spread bore intake which should clear and you would have had EGR to deal with if it hadn't already been blanked off.

See how that works?


Street demon won't clear the choke well on a spread bore. It will clear on an older edelbrock 318/360 performer though. Watch ebay for factory reman street demons at low prices.

Re: Street Demon Carb [Re: Montclaire] #2673699
07/03/19 04:33 PM
07/03/19 04:33 PM
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Sniper Offline
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Originally Posted by Montclaire
Originally Posted by Sniper
Point is a 70 manifold is a squarebore one and you will need an adapter to fit the Speed Demon but no EGR valve to clash with the linkage, that's why telling us what you have is important.

Had it been a 73 340 intake then it would be a spread bore intake which should clear and you would have had EGR to deal with if it hadn't already been blanked off.

See how that works?


Street demon won't clear the choke well on a spread bore. It will clear on an older edelbrock 318/360 performer though. Watch ebay for factory reman street demons at low prices.


I was unclear, by clearing I meant the throttle blades shouldn't hit the intake on a 73 intake, I mentioned above the the choke well could be an issue.

All of these issues are partly why I suggested considering another 1406 since all that is already sorted.

Re: Street Demon Carb [Re: Montclaire] #2673746
07/03/19 06:01 PM
07/03/19 06:01 PM
Joined: Dec 2007
Posts: 55
Long Island, New York
57Fury440 Offline OP
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I checked with the tech at Jegs and he said the Street Demon will fit same as the edelbrock on there now. Thanks.

Re: Street Demon Carb [Re: 57Fury440] #2673763
07/03/19 06:51 PM
07/03/19 06:51 PM
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Posts: 1,136
Columbus, GA
Michael Ecks Offline
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57Fury440 there is a lot of wrong information above.

The Street Demon is not spreadbore, and it will not work with the later 340 spreadbore intake that thermoquads came on. I believe its actually the primaries that bind on those intakes. If you in fact have the 1970 340 intake (four holes) it should work on that intake. The Street Demon pattern is much closer to the Holley 3 Barrel design, except the rear barrel butterfly is goggle shaped instead of an elongated oval. Its the "nose portion" cutout of the goggle that allows it to flip open on regular intakes, unlike the big oval holley three barrel which required a notch in the intake to accommodate it, this is why LD340's came from the factory with a notch between the secondaries.

Part of the Street Demons choke housing does hang a little below the rest of the base mounting surface. Its a small bit of the choke pull off mechanism so it MAY fit nicely into the intake's choke well, or at most you'll need a thick base gasket or a couple thin ones stacked together.

If you have a low profile air cleaner that can be a problem as the accelerator pump level sticks up above the top casting that same way a thermoquads does. On mine I had to cut a hole in the air cleaner there and tack in a little bubble to make clearance. If you are using a stock style air cleaner you are probably good to go. Just test fit everything as you go.

Hooking up linkage was a pain in the ass for me. The throttle lever pin they sell for the street demon, I couldn't even figure out how it was supposed to work. I ended up using a holley throttle lever adapter and a stock mopar pin/stud whatever you want to call it but had to drill a new hole in the adapter lever to get the overall throw of the lever to match up with the factory kickdown linkage.

While you are at it I would highly suggest ordering the tuning kit that has rods/springs/jets etc. Mine was super rich from the factory.

Be advised that the tiny little screws that hold down the metering rod springs are put on with loctite at the factory. Making them easy to snap if you aren't expecting them to be glued in. A tiny pencil torch from harbor freight to heat up just the area around the screw is useful.

Good luck!

Last edited by Michael Ecks; 07/03/19 06:58 PM.

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Re: Street Demon Carb [Re: 57Fury440] #2673774
07/03/19 07:31 PM
07/03/19 07:31 PM
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Scranton, PA
Montclaire Offline
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Originally Posted by 57Fury440
I checked with the tech at Jegs and he said the Street Demon will fit same as the edelbrock on there now. Thanks.


Great! When you find out that it doesn't, please let us know which compromise you settled on.

Re: Street Demon Carb [Re: Montclaire] #2673794
07/03/19 08:31 PM
07/03/19 08:31 PM
Joined: Dec 2007
Posts: 55
Long Island, New York
57Fury440 Offline OP
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57Fury440  Offline OP
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A lot of good info here, thanks. I will most likely get another Edelbrock 1406. I know it will fit and the old one worked fine for years. Thanks again.

Re: Street Demon Carb [Re: Montclaire] #2673857
07/03/19 11:08 PM
07/03/19 11:08 PM
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Columbus, GA
Michael Ecks Offline
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Originally Posted by Montclaire
Originally Posted by 57Fury440
I checked with the tech at Jegs and he said the Street Demon will fit same as the edelbrock on there now. Thanks.


Great! When you find out that it doesn't, please let us know which compromise you settled on.


The profile of the base of the Street Demon is almost the same as the Edelbrock he is already using, so what exactly is the issue you think is there?


"The happiness of your life depends upon the quality of
your thoughts" ~ Roman Emperor Marcus Aurelius
Re: Street Demon Carb [Re: 57Fury440] #2677431
07/14/19 09:07 PM
07/14/19 09:07 PM
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TC, Minnesota
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Gabmando Offline
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I have a 73 Charger Rallye 340 4 speed. Factory carb is a Carter TQ which is a spread bore carb. Ran great except I got tired of fiddling with the factory choke all the time.

I installed a spread bore to square adapter with the 4 individual runners. I of course made an adapter to raise the accelerator cable.

I first tried an Edelbrock 1406. Started and ran great. Gas mileage was not as good as TQ, and did not push you back in your seat like the TQ when you floored it.

I then tried the Street Demon. Great carb. Easy to set up. Ran well. Idled well. Gas consumption good. Much better than Edelbrock when you floored it, but not quite like the TQ.

Bottom line is that the Street Demon is exactly what you see and hear on youtube and on the internet. Easy to set up. Runs great. Good all around carb.

I personally opted to go back to the TQ and replaced the factory electric choke with a manual choke. I know it's very old school, but I'm old enough to where I know how to use it.
I know many have had bad experiences with TQ, but when you have a good one it's great. When you have a bad one, you have my sympathy.

Re: Street Demon Carb [Re: Michael Ecks] #2677435
07/14/19 09:17 PM
07/14/19 09:17 PM
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Sniper Offline
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Originally Posted by Michael Ecks
57Fury440 there is a lot of wrong information above.

The Street Demon is not spreadbore,


Not a spreadbore?

[Linked Image]

Re: Street Demon Carb [Re: Sniper] #2677756
07/15/19 06:26 PM
07/15/19 06:26 PM
Joined: Jan 2003
Posts: 1,136
Columbus, GA
Michael Ecks Offline
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Columbus, GA
Originally Posted by Sniper
Originally Posted by Michael Ecks
57Fury440 there is a lot of wrong information above.

The Street Demon is not spreadbore,


Not a spreadbore?

[Linked Image]


I suppose the easy definition of "spreadbore" is larger rear butterflies then front. But most people I know consider the AFB, AVS, Holley to be squarebore and T-quad and Q jet to be spreadbore carburetors. A LOT of carburetors actually have smaller front than rear butterflies it's obvious on this AFB, but if you take apart as many carbs as I have you'll find the butterflys seldom interchange front to back.

s-l1600 (3).jpg

"The happiness of your life depends upon the quality of
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Re: Street Demon Carb [Re: Michael Ecks] #2677758
07/15/19 06:29 PM
07/15/19 06:29 PM
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Columbus, GA
Michael Ecks Offline
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In this picture you can see that the squarebore intake, like the OP has, will fit just fine. At least throttle bore pattern wise. Choke, linkage, etc may be a different story.

squarebore.jpg

"The happiness of your life depends upon the quality of
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