[Larry Navarro]

i sold my HP1050 this morning, now looking at Demon carbs just for grins.
they have an 850 "mighty demon" with annular boosters and down leg boosters.
two questions.
first, what are your feelings about the demon products?
second, what boosters offer the best performance for street driving and occasional strip use?
skip fix seems to like his demon right out of the box.
skip, what series demon do you run?
thanks guys!


[This message was edited by Larry Navarro on December 28, 2002 at 05:57 PM.]

[Larry Navarro]

i sold my HP1050 this morning, now looking at Demon carbs just for grins.
they have an 850 "mighty demon" with annular boosters and down leg boosters.
two questions.
first, what are your feelings about the demon products?
second, what boosters offer the best performance for street driving and occasional strip use?
skip fix seems to like his demon right out of the box.
skip, what series demon do you run?
thanks guys!


[This message was edited by Larry Navarro on December 28, 2002 at 05:57 PM.]

[Tom Vaught]

Quote:

"It's funny, because the Claw series of carbs seemed to work extremely well. The Demon carbs have had problems since day one."

Holley made a LOT of money off of Mr. Grant for his "extreme resemblance" of the Claw carbs to
the Holley carbs. He thought they looked different
enough but a group of 12 people thought a little
"differently" LOL!

As the claws were based on exactly the same design
calibration specs, you would hope that the homework Holley did would translate to the claw
piece of metal and work well too.

Scott, because he works for Summit is caught in the middle.

My opinion, NO CARB should have trash inside it!
Be it Weber, Rochester, Holley, Demon, etc.

Hard for Owner installation to get metal shavings inside a carb. Scott. Tom V.

[Skip Fix]

Larry , They do have the good no stick gaskets so it comes apart easily. If your car is going to hook hard I would recommend getting the jet extenesions for the secondaries, the kind the jets screw into. As it hooks gas sloshes to rear away form metering block.You have to get a notched float also.Not sure if you ordered yours with them. Not a problem with Q jets with jets at the bottom of the bowl.

[SCOTT ESTERLE]

I deal with Barry Grant almost on a daily bases being i work in the warranty dept. I don't have much of an issue with them. It might be they take care of us & our cust do to the large volume we sell of there products. The reason they want to handle the warr is do to the carbs are pretty much a custom piece even though you can get them off the shelf. We were testing rtned carbs at Summit & over a 6month period we found that very few had a problem it was generally installation error. When a company gets a product back that isn't defective why should they eat it because they certaintly can't re-sell it as new.

[6567GTO]

The 750 Drag Race Demon I bought through Butler had machine turnings in it as well. BG's QC Dept. needs to get with it.


http://home.earthlink.net/~uptons1/

[Tom Vaught]

Larry,

Barry Grant makes the Demon.

The mighty Demon is a good carb and should serve you well as it has adjustable air bleeds and the
annular boosters you mentioned along with screw
in emulsion tube bleeds. Tom V.

[Larry Navarro]

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR> Larry,

Barry Grant makes the Demon.

The mighty Demon is a good carb and should serve you well as it has adjustable air bleeds and the
annular boosters you mentioned along with screw
in emulsion tube bleeds. Tom V.
<HR></BLOCKQUOTE>
one comforting quote, as i'm trying to keep an optimistic look through the entire series of posts. should have my carb tomorrow(second day air).

[Tim Corcoran]

I have always stayed away from the BG/Demon carbs as I always thought they were just over priced Holley copies. In fact there was a large law suite between Barry Grant and Holley. As a result BG had to do some design changes, mostly cosmetic to settle the suite. I disagree with the judges decision. At first BG was just tuning/modifying the Holley carbs (like the carb shop does) and as the business grew started making Holley copies then the law suite. You would think that for the money they charge for a Holley copy they would have better quality control. Some people are attracted to the Demon carbs because they are new and advertising has convinced them they are better than a Holley. So far I am not convinced

Tim C

65 LeMans, 3600lb. all steel, full interior, D-ports and a flat tappet cam, 11.01@120

[Larry Navarro]

geez...what next.
hope my demon wasn't built on friday.
hopefully, they corrected the past problems with the new "mighty" demon line.

[herdswoman]

Tom, go ahead and bring it up. That carb had some VERY serious quality control issues and the management at Barry Grant failed to recognize that fact. Basically told us they'd send us a new carb but to not call them again. Took the new carb and it ran like crap. So we never called them, my husband looked it over, we sent it to you for a complete tear-down, you found the multiple problems with it and Barry Grant's people can just read about it on the 'net. Don't think they'll be seeing any more of our money for awhile.

Ponchopete, while I'm sorry that your customers have had troubles with their Demons, it's nice to know that it's not just us. Seems like the people we'd heard about that had Demons were very happy with them, no problems. Was beginning to think that we had some dark cloud following us around. Now runnning a $75 POS swap-meet Holley and it runs like a champ.

[SCOTT ESTERLE]

I agree there should not be any metal shavings in the carb. You are paying top dollar that thing should perform out of the box. Holley is not flawless i just took one of there new carbs apart Friday & it was full of silver particles from that nice silver finish they put on the carb. What i suggest is just like the oil pumps take it apart & check the float settings & everything before you run it. That is what i do.

[all_ryze]

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by ponchopete:
It's funny, because the Claw series of carbs seemed to work extremely well<HR></BLOCKQUOTE>

Poncho,
The problems I was refering to were on the silver claws. 2 claws, both with metal turnings!
Once clean, they tuned real well, kind of like a Holley!

MOTOR CITIES FINEST
PHS Documented "REAL JUDGE"
12.53 @ 110.68 on street tires, through the mufflers and a 4 speed!!

[Tom Vaught]

Larry,

Have seen SEVERAL Mighty Demons used on Blower
carb Magazine articles and all say no issues.
Expensive carb though. Tom V.

[Larry Navarro]

took the carb apart this evening and found nothing, no shavings or any other problems.
seems like a very well prepared piece out of the box. the secondary block has a plug for the pwr valve and the jetting is 80pri. and 88sec.
bad thing is that i don't have time to put it to use on the car, maybe not till next weekend.
business and related travel are gonna keep me occupied for a while.

[ponchopete]

Not trying to be argumentative with anyone here, just some observations on Demon carbs that I've had since I work for a speed shop which has been selling these carbs for a couple of years:

-literally every customer that I have sold a Demon to has had problems with an off idle stumble that has proven to be difficult at best to tune, even with the help of B/G technicians
-many Demon carbs seem to have very unresponsive idle circuit tuning
-at least 30-40% of the carbs I have sold have had metal particles in them that appear to be left over from machining processes
-several have had loose power valves right out of the box
-A reputable local performance oriented tuning facility that is equipped with a chassis dyno has repeatedly reported that the fuel curves of various Demon carbs they've tried to tune are all over the place, and have in almost every case replaced the Demon carbs with Holley HP carbs, which have consistently shown stable fuel curves along with horsepower and torque increases on every vehicle they have switched over.
-A reputable local engine builder who offers many high horsepower turn key engines had a customer's 500 h.p. pump gas small blah Chevy on the dyno. The engine was equipped with a 750 cfm Speed Demon with mechanical secondaries. After optimizing the tune on the Demon for max power production, they then installed a Holley 750 double pumper (#0-4779) with choke and all just for comparison. In out of the box tune on the Holley, the engine picked up 17 horsepower at peak on the very next pull, and the gain was repeated on the second pull with the Holley. The Demon was reinstalled, and horsepower promptly dropped.

Personally, I am not impressed with these carburetors. There are some very nice ideas behind the Demon line of carburetors, but I think the execution of the final product is poor, especially for the money the customer has to spend on one of these. For those that have had success with them, great, but I myself will stick with Holley. Just as FYI, the thread size in Demon float bowls is 9/16"-24 (same as a Holley 1850). Just about all of the major AN fitting suppliers have fittings that will work in these bowls.

"My car would be fast if it had an engine, transmission, and rear axle in it."

[455-4+1]

Tom

My 850 Annular Mighty Demon has provision for a secondary power valve but comes plugged (as all cars that leave resonably should do as you stated)

Jetting std is 80 up front and 88 rear so jetting is staggered to account for PV

Anyone out there have a 750 VS Speed demon

Was working on one today for a friend on a (gasp) 360 mopar and the secondaries would open when "winging" the throttle in neutral with a brown (heavy) spring in it. (accompanied by a bad midrange bog)

My previous experience with Holleys lead me to think maybe the check ball in the vacum pod had been left out. Upon dissassembly there was no check ball-slot nor the later style pressed in brass restriction with a drilled hole (0.038" on the old Holley one sitting in front of me). The passage is around 1/4" in diameter?????.

They (BG) also state the exact starting opening points and full open points as the holley VS models for the different spring colours which is fine except that the installed height of the springs is some 4mm greater in the Demon causing the spring to be preloaded less ????? (ie Earlier opening point)

Unable to figure out how this could be I emailed BG and got a one line reply stating "based on the orifice size going through the main body we do not use a check ball in our vacuum pods." yet the pick up in the main body looks the same as in the old 750 Holley the demon replaced!!! The Holley uses a checkball-slot and runs like a cut cat with a yellow (light) spring

If anyone has a VS demon that runs well could they please check if it has a pressed in brass restrictor in the vacum passage in the main body of the vacum pod like the old Holleys

Thanks in advance

Working on going faster!!!

[ponchopete]

Herdswoman, Tim C., All-Ryze,
In my not so humble opinion, B/G products are simply crap. B/G technical support fits the bill well, as it is crap too. The fuel pump problem most definitely exists. In the last six months, we have had numerous complaints and problems with their fuel pumps. They have one of the worst warranty policies in the business -- you have to send your part back, they fix it, and charge you for any parts they used, even if the problem is a manufacturer defect. They will not sell repair parts for their pumps or regulators to their dealers or the end user. We recently sent back a 280 pump, as it was leaking from between the motor and housing. They repaired it, and sent a repair bill for $234.00. We sell these pumps new for $289.00! Just in case anybody needs parts for their B/G stuff, and don't want the hassle of dealing with them, I believe Product Engineering has service parts that will work in the B/G junk.
As far as the Holley lawsuit goes, to the best of my understanding, that whole deal is the reason the Demon line of carburetors came to be. Originally, along with their modified carburetors, B/G offered the "Claw" series of carburetors (SportClaw, SilverClaw, GoldClaw), which had all the same features that the Demons have now (Speed Demon, Race Demon, Race Demon RS). The Claw series used all B/G manufactured parts, but looked almost identical to a Holley. I'm told that this is what sparked the lawsuit, which, IMO, Holley was well within their right to do. Supposedly, to make Holley happy, B/G agreed to drop the Claw line of carbs and go back to the drawing boards, which produced the Demon. It's funny, because the Claw series of carbs seemed to work extremely well. The Demon carbs have had problems since day one.

"My car would be fast if it had an engine, transmission, and rear axle in it."

[pont406]

Anyone changing from a Holley carb, to a Demon Carb,(like I did) and using one of those chrome steel dual fuel line setups, holley makes the proper bowl fittings for the swap, part no# 26-43 if memory serves.

[WARPed]

I own two (750rs race & 1095rs King) and they are great, both are annular discharge boosters. They will offer a better quality of air/fuel at the price of some airflow.

with out questions there can be no answers

1969 Grand Prix
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