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07-04-2004, 06:21 AM
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Senior Club Cobra Member
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Join Date: Jan 2004
Cobra Make, Engine: In Limbo for the time being
Posts: 118
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Not Ranked
Demon carb vs Holley carb
Jsut wondering which carb you guys have found to get better performance,ease of set up, and best overall luck with let me hear your opinions Thanks Chris
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07-04-2004, 07:01 AM
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CC Member
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Join Date: Aug 2002
Location: Dacula, (Atlanta),
GA
Cobra Make, Engine: Unique 427 SC, Southern Automotive 427W Stroker
Posts: 1,649
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Not Ranked
I'm happy with my BG Mighty Demon, mechanical 750.
__________________
After a good hard ride.....oil pressure is over 50, temp is below 190, she idles and no new dents. LIFE IS GOOD!
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07-04-2004, 11:35 AM
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CC Member
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Join Date: Feb 2004
Cobra Make, Engine:
Posts: 563
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Not Ranked
..........
Last edited by rob frink; 12-28-2010 at 07:41 AM..
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07-04-2004, 04:14 PM
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CC Member
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Join Date: Oct 2003
Location: Winter Park,
Fl
Cobra Make, Engine: Hunter with a 4.6 supercharged
Posts: 690
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Not Ranked
Never had a problem with a Holley. Most out of the box are very close and they are easy to tune and set up as well as overhaul when the time comes.
Must admit have not played much with the Demons but kind of feel like they are an "attempt" to improve the Holley style of carbs.
__________________
Bruce Edwards
Gemini Motorcars Inc.
http://home.bellsouth.net/p/PWP-GeminiMotorcars
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07-05-2004, 05:40 AM
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CC Member
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Join Date: Jun 2003
Location: Australia,
Zzz
Cobra Make, Engine: Shelby alum 468 block
Posts: 14,974
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Not Ranked
What are the differences in cost and ease of set up.
Advantages from one to the other in set up?
Cheers
Bernie
__________________
Bernie Knight
KMS 427 #662 Shelby 468 CSX 1026
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07-05-2004, 12:55 PM
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CC Member
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Join Date: Aug 2002
Location: Dacula, (Atlanta),
GA
Cobra Make, Engine: Unique 427 SC, Southern Automotive 427W Stroker
Posts: 1,649
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Not Ranked
Bernie, the folks at BG will be the first to tell you that their carbs like lots of advance. I took delivery of my stroker with the Mighty Demon installed from the beginning. It seemed to be a bit rich so we reduced the jet sized on both primary and secondaries. It always seemed to run well (no hesitations, great idle, lots of power at WOT etc.) I finally took here in to a dyno tune shop where an additional 6 degrees if advance was added and the jets were returned to the values installed from the factory. Since the carbs are configured per the specifics of your engine and flow tested prior to shipment, they seem to get it pretty well "spot on" out of the box. Might need a little bit of distributor-twisting to get it all set up. Several of the local guys have yanked their Holleys and replaced them with Demon carbs. BG has a good name around here.
__________________
After a good hard ride.....oil pressure is over 50, temp is below 190, she idles and no new dents. LIFE IS GOOD!
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07-05-2004, 02:35 PM
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CC Member
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Join Date: Dec 2000
Location: Los Angeles,
CA
Cobra Make, Engine: E.R.A. FIA #2088 1964 289 w/Webers
Posts: 2,151
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Not Ranked
I've used both Holley & Demon. They are both great carbs but Demon has a competetive edge as it was designed to be a better "Holley" out of the box. For vintage looks I go with the Holley. Anything else I like the Demon. Performance wise the differences are minimal in the seat of the pants but as we all know in racing sometimes you can't feel a tenth of a second. That said there are a number of aftermarket Holley's that will stand up to or possibly exceed any Demon in side by side testing.
__________________
Hyde D. Baker
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07-06-2004, 08:03 AM
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CC Member
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Join Date: Mar 2000
Location: Fairfield, NJ, USA,
NJ
Cobra Make, Engine: A & C, 351W, Tremec 3550. Exiled Member: Club Cranky
Posts: 5,897
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Not Ranked
It's interesting to note that the same thread is going on over at the FFR forum with complete opposite results. Most over there favor the Holley while most here the BG. Don't know what the hell this means but curious anyway.
I love my BG.
Roscoe
__________________
Roscoe
"Crisis occurs when women and cattle get excited!"....James Thurber
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07-06-2004, 09:40 AM
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CC Member
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Join Date: Dec 2000
Location: Broken Arrow. OK ( South Tulsa), USA,
OK
Cobra Make, Engine: 66 COBRA FE 427 /4SP. (HCS Coupe w/ 408 Stroker and TKO 600 -sold)
Posts: 5,595
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Not Ranked
Me too Roscoe! Terrible gas mileage but I love the performance of my BG Speed Demon. Pretty darn snappy.
Clois
__________________
Sunshine, Asphalt and no stop signs...Perfect
"Let's roll"
"Be part of Something Good
......Leave Something Good Behind!"
from CD "Long Road Out of Eden"
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07-08-2004, 07:49 PM
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CC Member
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Join Date: Oct 2003
Location: Chicago,
IL
Cobra Make, Engine: FFR Carbon 320 AFR
Posts: 13
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Not Ranked
Hi Clois
I have been using Holly HP's with no problems. I wanted to use the Demon line because they sure appear to be better but three differend engine builders that I respect all said that the Holley's make more power on engine dyno's.
Hope to se you at R&G in Sept.
John
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