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Author
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Topic: Holley vs. Demon
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thumpin cat
Gearhead Posts: 339
From:
Registered: Mar 2002
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posted 05-16-2003 02:47 AM
  
Honestly out of the box what carb would perform the best the 750 Speed Demon, or the 750 double pumper by holley.please let me now thanks
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ted
Journeyman Posts: 37
From: Central Texas
Registered: May 2003
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posted 05-16-2003 07:01 AM
Depends entirely upon your combination. I've been fooled by the ratings on the Demons thinking that they were rated just like the Holleys. What I found out after working with an 850 Demon for quite awhile and it not performing as well as the Holley it was replacing is that the Demons are wet flowed for cfm rating while a majority of the Holleys are dry flowed. That means a Demon carb of any size will significantly dry flow more air which makes comparing Demons to Holleys like comparing apples to oranges. I've got a 650 Demon on a race car now that I'm really pleased with while the other race car is still Holley happy. To date, I've had five demons of various sizes and overall been happy with them after figuring out that it's easy to over carbureate (sp?) with them.------------------
Ted E.
Fe's are plenty fast, but "Y"'s are fun when they run in the nines.
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kid vishus
Gearhead Posts: 5248
From: middle of NC
Registered: Oct 2000
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posted 05-16-2003 07:57 AM
I beleive Alex tested a 750 HP to a 750 Demon on the dyno last year. If I remember correctly, the HP carb made 25 hp more than the Demon.Personally, since Demons are made by the folks at Barry Grant, I wouldn't buy one.
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capri man
Gearhead Posts: 4320
From: doerun, ga.
Registered: Nov 2000
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posted 05-16-2003 08:50 AM
barry grant sux!!------------------
mike r
racing is real
everything else is just a game.
81 capri-7.51 @89mph 1/8
1.54 60 ft.
http://prestage.com/site/site_display.asp?SiteID=141
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CometGT1974
Gearhead Posts: 286
From: Asheville, NC USA
Registered: Jan 2002
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posted 05-16-2003 09:05 AM
I disagree, I think Barry Grant makes good stuff.
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kid vishus
Gearhead Posts: 5248
From: middle of NC
Registered: Oct 2000
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posted 05-16-2003 09:15 AM
BG's quality control is terrible. Their "techs" are quite possibly the most arrogant and unknowledgable people on the planet. Thier customeer service ranks right down there with TCI and GER.My opinion of them changed to this after talking with a couple of their reps at the PRI show a couple of years back. And after one well known Iowa speedshop had a ton of problems with BG's product and customer service, I decided if a shop that was spending a bunch of money with them wasn't important enough to deal with properly, then a "simple sportsman racer" probably didn't deserve the time of day in their eyes.
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Mike_R
Gearhead Posts: 158
From: Indianapolis, IN 46237
Registered: Feb 2001
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posted 05-16-2003 10:23 AM
We have a pretty nice Speed shop here in Indy that does alot of business with the local Indy drag racers. I was told by them that they sold the Demons for a while and the quality was terrible. He said most of them were being returned with some kind of defects. They decided to quit selling them. Of course he did say it's possible that that has changed in the last year or two since they quit selling them. That scenario sure didn't give me a good feeling though.I think the Holley HP series is very nice. These are a major upgrade from the standard Holley series.
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Tea'sGrabber
Gearhead Posts: 240
From: Seattle, Wash.
Registered: Feb 2003
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posted 05-16-2003 12:04 PM
IMO the new BG's aren't quite up to par with Holley's. I've been told that the older re-worked Holley's that BG did were excellent. Since they (BG) started making their own stuff and producing for the mass's vs. on an individual bases the just can't quite match Holley. In all cases with race/high performance parts. The more you ask, the more opinions you get. ------------------
Todd 71 Mav Grabber All orig 306 cu.in. Cast Iron heads. Carillo Rods.Best et. 10.71 @ 124 thru the mufflers.
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Rory McNeil
Gearhead Posts: 1311
From: Surrey, B.C. Canada
Registered: Nov 2000
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posted 05-16-2003 12:04 PM
I have a friend who also worked at a large area speed shop, in the shop. They too, had many warranty issues with the BG carbs. I just looked thru my Jegs catalog, & noticed that Demon-BG products are not listed. Considering that Jegs sells Predators, & some specialized circle track carbs, the lack of the Demon line seems rather interesting.------------------
78 Fairmont 428 4 speed 10.20@130mph
80 Fairmont 302 5 speed 12.8@105mph
85 Mustang NHRA Stocker 302 5speed. soon to be under the index!
59 Meteor (Canadian Ford) 2 dr sedan 332, auto
74 F350 ramp truck 390 4spd
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RADRIDE
Gearhead Posts: 270
From: Va.Beach, Va.
Registered: Aug 2002
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posted 05-16-2003 08:41 PM
I think everyone is trying to over tune the carb.I have a new MightyDemon 750 on my little ole 289 and even tho I think it is to much I plan a stroker,but saying that I got good A/F mixture out of box.Still a little rich 12.9,but thats safe for first run in Nashville on new heads.Will jet down after to see any dif on dyno.I also know someone with a 408 and a RaceDemon and he cant get it to run properly so just like life everything is a compromise.
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Mpcoluv
Gearhead Posts: 1144
From: Charlotte NC usa
Registered: Apr 2001
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posted 05-19-2003 03:40 PM
BG Demon carbs had (have?) a problem with bad metering block castings.
Barry Grant gives the magazine guys all the carbs they want, so you see lots of articles using them.
I imagine if you get one with a good pair of metering blocks, you should be OK.
If Holley goes down the tubes, we all may be running Demon carbs.
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