Demon carb rages
Thread Starter
Racer
Joined: Oct 2005
Posts: 267
Likes: 0
From: Orlando FL
Demon carb rages
As it turns out, the main culprit of my new Demon carb leaks were related to the secondary diaphragm. I changed it and checked a few other things and stopped the gasoline shower display. I then started up the 454 behemoth and it ran like it had never run before; crisp and responsive. The Holley that it replaced was bought brand new a short time ago, so it was not a worn out carb. After installing the Demon, I then sent the car to my mechanic, "Rickracer", who worked on some things, as well as observed the performance with the Demon. He is also quite pleased with how much better the engine is running with the Demon carb over the Holley. The Holley was a gas dumping pig and the car was sloppy as hell with it. The Demon I am using is an 850 Mighty Demon w/annular boosters. I don't know how anybody can compare a Holley to a Demon based on what I have experienced. "Rickracer" was the person who advised me to make the switch and I am glad that he did. The difference is astounding, to say the least.
Hype doesn't mean a thing in the real world. Results speak the truth and time always reveals the truth. The Demon wins by KO in first round BLOWOUT!! I will just throw the Holley in the garbage can where it belonged since birth.
Hype doesn't mean a thing in the real world. Results speak the truth and time always reveals the truth. The Demon wins by KO in first round BLOWOUT!! I will just throw the Holley in the garbage can where it belonged since birth.
Last edited by Grutzy; Dec 15, 2005 at 11:10 AM.
Burning Brakes
Joined: Aug 2002
Posts: 1,146
Likes: 10
From: Scottsboro Alabama
Originally Posted by Grutzy
Anybody want a black smoke bellowing sh*tpile carb for $25? Actually, I will just throw the Holley in the garbage can where it belonged since birth.
Why not post it on the christmas gift give-away thread? Surely someone will want it.
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Thread Starter
Racer
Joined: Oct 2005
Posts: 267
Likes: 0
From: Orlando FL
The Demon is brand new. I was tired of the Holley and felt that it was worth the experiment to find out the truth about the two carbs. I was hoping that the low rpm sluggishness was carburetor related and man, was I correct!
I am not cruel enough to send the Holley to any members here. I'll just dump it in the garbage where it belongs. The Holley did not even have 500 miles on it. The car never ran correctly with the Holley on it and was always sluggish up until about 2000 rpm's. Originally, I had a dual plane Chevrolet high rise intake but now there is a Weiand TeamG open plenum on it. The Holley was too rich no matter what else was going on. I might even sledge hammer the Holley rubbish in grand ceremonial fashion before the illustrious dumping takes place. Hell, if I get in the mood I might go buy another one at the local speed shop and sledge it right in front of the salesman, just as a statement. Then again, that would support the company that makes the junk even more. As you can tell, I don't have any respect for money and even less for Holley's at this point!
I am not cruel enough to send the Holley to any members here. I'll just dump it in the garbage where it belongs. The Holley did not even have 500 miles on it. The car never ran correctly with the Holley on it and was always sluggish up until about 2000 rpm's. Originally, I had a dual plane Chevrolet high rise intake but now there is a Weiand TeamG open plenum on it. The Holley was too rich no matter what else was going on. I might even sledge hammer the Holley rubbish in grand ceremonial fashion before the illustrious dumping takes place. Hell, if I get in the mood I might go buy another one at the local speed shop and sledge it right in front of the salesman, just as a statement. Then again, that would support the company that makes the junk even more. As you can tell, I don't have any respect for money and even less for Holley's at this point!
Last edited by Grutzy; Dec 15, 2005 at 11:12 AM.
Thread Starter
Racer
Joined: Oct 2005
Posts: 267
Likes: 0
From: Orlando FL
Don't believe the hype. If what you are saying were true, my 454 would not run so much better and it does. "Rickracer" told me that the Demon carbs have far superior machining which allows them to be more accurate. All I know is that the engine runs 100 times better with the Demon than it ever did with the Gas dumping pig, Holley. God bless Barry Grant, even if he does advocate a gasoline shower every now and then to his new partrons.
Last edited by Grutzy; Dec 15, 2005 at 02:40 PM.
Melting Slicks
Joined: Jul 2002
Posts: 3,000
Likes: 22
From: Boulder Creek California
Originally Posted by Grutzy
Demon carbs have far superior machining which allows them to be more accurate.
I had some trouble at first in the form of float adjuster gaskets which led to the carb pissing a 3ft stream of gas. It never showered me but I was more than a little worried that it was going to burst into flames. Anyhow with new, better gaskets and replacing an O-ring that I split (that was bypassing the needle/seat and dumping into the secondaries), it runs like a champ. Started, warmed up, and ran in sub-freezing weather today without a qualm.
-Chris
edit: I agree you're a little haywire in your hatred of Holleys though
They've been on hundreds of thousands of performance cars for decades, you either had a fluke or *ahem* operator error. Still, they can have my Speed Demon when they claw it from my cold, dead grasp 
Last edited by LiveandLetDrive; Dec 15, 2005 at 03:13 PM.
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
First of all I am glad your car is running good. 
Have heard similar stories many times here. Usually it is a 20 year old Holley that was on the car when someone bought it, the motor run like crap. THe guy buys a brand new Demon and now the motor runs great. So are Holley carbs crap or would the car run just as good with a new Holley. A properly tuned Holley would run just as well on your car. Give it to a forum member and he will prove my point
Have heard similar stories many times here. Usually it is a 20 year old Holley that was on the car when someone bought it, the motor run like crap. THe guy buys a brand new Demon and now the motor runs great. So are Holley carbs crap or would the car run just as good with a new Holley. A properly tuned Holley would run just as well on your car. Give it to a forum member and he will prove my point
Thread Starter
Racer
Joined: Oct 2005
Posts: 267
Likes: 0
From: Orlando FL
The Holley I have is practically new and NEVER ran anywhere near as well as the Demon. It ran ok from midrange on up but it is an archaic junkpile compared to the Demon. The Demon ran great right out of the box as soon as I fixed the leak. The response right off of idle was sluggish on the Holley and is crisp on the Demon, even when cold. Does anybody else want to tell me how good the Holley is?
Thread Starter
Racer
Joined: Oct 2005
Posts: 267
Likes: 0
From: Orlando FL
Originally Posted by 694speed350
Please dont destroy the holley i would be glad to have it. would be glad to buy it and pay shipping. 
Advanced
Joined: Sep 2005
Posts: 93
Likes: 0
Originally Posted by Grutzy
I think the Holley would be too large for your car. It is an 850 double pumper. I would be willing to give it away to the member who is most in need of it. That is, if I am able to restrain my destructo reflex!
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
From my recent experience I believe the Demon carbs seem to come tuned closer to a "typical" application based on the CFM of the carb. I had to pull *6 sizes* of primary jets out of the 3310 I bought for my LT-1 (10.2 CR) style 355.
If it's not too much of a PITA, how about a quick comparison of jet sizes for the "junk" Holley and the Demon?
If it's not too much of a PITA, how about a quick comparison of jet sizes for the "junk" Holley and the Demon?