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Author Topic:   Holley vs. Demon
thumpin cat
Gearhead

Posts: 339
From:
Registered: Mar 2002

posted 05-16-2003 02:47 AM     Click Here to See the Profile for thumpin cat     Edit/Delete Message   Reply w/Quote
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

posted 05-16-2003 07:01 AM     Click Here to See the Profile for ted   Click Here to Email ted     Edit/Delete Message   Reply w/Quote
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.

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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

posted 05-16-2003 07:57 AM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
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

posted 05-16-2003 08:50 AM     Click Here to See the Profile for capri man   Click Here to Email capri man     Edit/Delete Message   Reply w/Quote
barry grant sux!!

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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

posted 05-16-2003 09:05 AM     Click Here to See the Profile for CometGT1974   Click Here to Email CometGT1974     Edit/Delete Message   Reply w/Quote
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

posted 05-16-2003 09:15 AM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
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

posted 05-16-2003 10:23 AM     Click Here to See the Profile for Mike_R   Click Here to Email Mike_R     Edit/Delete Message   Reply w/Quote
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

posted 05-16-2003 12:04 PM     Click Here to See the Profile for Tea'sGrabber   Click Here to Email Tea'sGrabber     Edit/Delete Message   Reply w/Quote
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.

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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

posted 05-16-2003 12:04 PM     Click Here to See the Profile for Rory McNeil   Click Here to Email Rory McNeil     Edit/Delete Message   Reply w/Quote
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.

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78 Fairmont 428 4 speed [email protected]
80 Fairmont 302 5 speed [email protected]
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

posted 05-16-2003 08:41 PM     Click Here to See the Profile for RADRIDE   Click Here to Email RADRIDE     Edit/Delete Message   Reply w/Quote
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

posted 05-19-2003 03:40 PM     Click Here to See the Profile for Mpcoluv   Click Here to Email Mpcoluv     Edit/Delete Message   Reply w/Quote
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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