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07-22-2011, 01:24 PM
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CC Member
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Join Date: Jan 2011
Location: Bellingham,
WA
Cobra Make, Engine: SPO2089, Ford Crate 393 475 Hp
Posts: 187
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Not Ranked
Holley Changeout
I'm looking to replace the carb (Holley 750 cfm, electriic choke, vacc secondaries).
I'm looking at three options: Barry Grant Speed Demon series; Quick Fuels and the Proform 67213.
The dyno shop guys were pretty neutral on the choice between the Quick Fuels and Proformance, QF was a bit more expensive, and I havent talked to them yet about the BG carbs. Other forums seem to indicate that the Proformance may have issues. Havent seen anything yet on the QF, and a frined is getting info on the BG carbs this weekend at a car show.
What say the group?
Thanks
Bob
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07-22-2011, 01:48 PM
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CC Member
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Join Date: Aug 2010
Cobra Make, Engine: RUCC, SB 331 Stroker
Posts: 171
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Not Ranked
QF...call Brent Lykins at B2B Motorsports, give him the engine specs and he can make a recommendation and have a custom carb built for your application. Great guy to deal with.
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07-22-2011, 02:17 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
Well, Barry Grant is out of business now. That should narrow the choices down. 
I've never had a Demon carb that was built correctly out of the box. They have all needed rebuilds, cleaned, or modified in one way or the other. One of the reasons that BG went out of business is just because their QC went downhill. Tons of trash in the carbs, screws left out, etc, etc.
You will not go wrong with a Quick Fuel. I use them on every engine I build for a customer. They are a little pricy, but you get what you pay for. |
07-22-2011, 03:08 PM
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CC Member
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Join Date: Oct 2003
Posts: 4,078
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Not Ranked
John Dickey at AED also builds a quality carb.
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Chas.
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07-22-2011, 03:34 PM
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CC Member
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Join Date: Oct 2003
Location: Bainbridge Island,
WA
Cobra Make, Engine:
Posts: 709
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Not Ranked
I've heard many good reports about custom QF carbs. Barry Grant is out of business as said earlier.
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07-22-2011, 04:12 PM
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CC Member
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Join Date: Dec 2001
Location: Castalia,
Oh
Cobra Make, Engine: EM cobra, 450 inch sbc running a best ET of 9.14..so far..ALL MOTOR...approx 800 horse.............ERA with 482 FE..All Aluminum Engine
Posts: 1,395
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Not Ranked
I would NEVER use a BG carb, but in case those of you that haven't heard...
Moore Good Ink - News
__________________
Jack
XSSIVE .....
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07-22-2011, 08:32 PM
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Senior Club Cobra Member
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Join Date: Feb 2004
Cobra Make, Engine:
Posts: 1,226
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Not Ranked
Why not just find someone to CORRECTLY tune your existing carb. if you're having problems? There are a million times more correctly tuned Holley's out there that out perform all those QF, BG and all other "wanna-bees" combined.
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07-23-2011, 07:04 AM
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CC Member
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Join Date: Jun 2009
Location: Brinnon,
WA
Cobra Make, Engine: ffr-347
Posts: 114
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Not Ranked
as Jim said-proper tuning makes a big difference-I changed from a dp650 after it would never run any way other that rich - to a 670 street avenger, now can start cold with no choke-faster warm up-plenty of power-mileage went from 12mpg to 18-20
Bob
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07-23-2011, 07:22 AM
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Stolen Avitar
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Join Date: Oct 2004
Location: Brunswick,
GA
Cobra Make, Engine: BDR 1311 428PI
Posts: 3,044
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Not Ranked
I'm running a BG race demon RS sleeved for 1050cfm and other than not being able to find parts right now I have had no problems with it.
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07-23-2011, 11:36 AM
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CC Member
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Join Date: Jan 2011
Location: Bellingham,
WA
Cobra Make, Engine: SPO2089, Ford Crate 393 475 Hp
Posts: 187
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Not Ranked
Quote:
Originally Posted by all motor
as Jim said-proper tuning makes a big difference-I changed from a dp650 after it would never run any way other that rich - to a 670 street avenger, now can start cold with no choke-faster warm up-plenty of power-mileage went from 12mpg to 18-20
Bob
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..thx. I probably should have indicated that I'm not having problems with the Holley other than a bit rich. The change out of the current carb is driven by other factors not related to trouble and poor performance.
However, before I replace the carb with another Holley, my intent in starting this thread was to get input from individuals who have the other brands installed on their cars and their experience with the brand after the installation. |
07-23-2011, 11:53 AM
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CC Member
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Join Date: Dec 2006
Posts: 415
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Not Ranked
X10 on the QuikFuel Carb. Love it.
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07-23-2011, 03:27 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
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07-23-2011, 05:33 PM
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CC Member
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Join Date: Aug 2007
Location: Carlsbad,
Ca
Cobra Make, Engine: SPF 2932 with 438 Lykins Motorsports engine. Previous owner of FFR 5452.
Posts: 2,616
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Not Ranked
Quote:
Originally Posted by all motor
as Jim said-proper tuning makes a big difference-I changed from a dp650 after it would never run any way other that rich - to a 670 street avenger, now can start cold with no choke-faster warm up-plenty of power-mileage went from 12mpg to 18-20
Bob
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I did just the opposite with a Demon 570 dp on my first FFR.
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Jim
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07-23-2011, 08:45 PM
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CC Member
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Join Date: Feb 2005
Location: Perrysburg,
OH
Cobra Make, Engine: SPF #298 427 FI
Posts: 497
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Not Ranked
I have one of these guys reworked holley anhttp://www.performancecarburetors.com/d its great. I used them because the guy who did my conversion from efi recommended them. That being said I still agree with others who say to buy if from Brent. He helped me out a lot with some clutch issues.
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07-23-2011, 09:27 PM
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CC Member
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Join Date: Sep 2009
Location: Camarillo,
CA
Cobra Make, Engine: SPF #2608, Roush 427SR T-W
Posts: 911
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Neutral
Bob, I might be interested in buying your old Holley. I have a 750 Holley 4150 HP Series set up by Bigs Performance Products. Or maybe I just try it for a few thousand miles.....
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07-23-2011, 09:41 PM
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CC Member
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Join Date: May 2006
Location: Portland,
OR
Cobra Make, Engine: ERA FIA, 1964 289->Webers
Posts: 3,689
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Not Ranked
I agree with having a Holley Double Pumper gone through, Modded & properly set up by an expert. They just look so classic.
__________________
ERA FIA 2088
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07-24-2011, 07:43 PM
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CC Member
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Join Date: Jun 2009
Location: Brinnon,
WA
Cobra Make, Engine: ffr-347
Posts: 114
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Not Ranked
WardL- I'm sure we could work something out-got anything to trade? ooppss wrong Bob-never mind!
Bob
Last edited by all motor; 07-24-2011 at 07:46 PM..
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07-24-2011, 08:26 PM
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CC Member
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Join Date: Jan 2011
Location: Bellingham,
WA
Cobra Make, Engine: SPO2089, Ford Crate 393 475 Hp
Posts: 187
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Not Ranked
....hahaha...
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07-24-2011, 08:56 PM
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CC Member
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Join Date: Oct 2003
Location: Bainbridge Island,
WA
Cobra Make, Engine:
Posts: 709
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Not Ranked
Get your car to climb up on a chassis dyno and put an A/F sniffer up the exhaust and do some pulls. Bring lots of jets to dial in a good A/F ratio. Make sure your idle circuit is adjusted correctly since it will influence all other fuel circuits. Could very well cure your fat A/F ratio and increase HP and torque in the process. Run the motor at a light cruise at around 2500 rpm and check A/F ratio and adjust the primaries as needed. Then do a full throttle pull and adjust secondaries if needed. Part throttle A/F should be around 14.5-15.0:1 and full throttle a good 12.5-13.0:1 A/F ratio. If you are truly running too rich now you'll see good gains in torque and HP and fuel economy after massaging the carbs A/F ratio.
Bill
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07-25-2011, 08:12 AM
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CC Member
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Join Date: Jun 2009
Location: Brinnon,
WA
Cobra Make, Engine: ffr-347
Posts: 114
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Not Ranked
ZOOM THIS-is there anyone on our side of the pond or down south that does these dyno tunes or has the equipment for A/F ? thanks (the other Bob)
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