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07-21-2005 09:55 AM #1
Carbs????
If I go with a carb over EFI, what is the difference between the Holly double pumper and the Edelbrock carb that I am looking at??? It has been about 20+ years that I have had a carb in anything and I can not remember what I did yesterday He!! when I went to pick up the Camaro the other day and it would not start, it took forever fo me to remember that I had to set the choke to start it
Thanks,
Charles
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07-21-2005 12:43 PM #2
carbs
Well to begin with holley's are what is called a modular carb and is of totally different design and function than the edelbrock which is really just an aftermarket carter afb with some updates. the edelbrock is simpler to calibrate but the holley will probably give you an edge over it if your engine combination is right. personally on a stock engine I wouldn't use a double pumper. I would go for a vacuum secondary holley or stick with the edelbrock if its the right cfm. Doulbe pumpers get crappy gas mileage on the street due to its mechanical secondaries and its double accelerator pumps(hence the name double pumper). A smaller cfm vacuum secondary single accelerator pump holley with the right discharge boosters will out perform a double pumper of larger cfm on a good street engine.
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07-21-2005 02:33 PM #3
Thanks,
It's not what you would call stock, it would go on a stroked 305 (335) with world torker heads an Edelbrock performer RPM intake and a compcam extrem cam. It's not my everyday driver
Charles
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07-21-2005 05:25 PM #4
I'd suggest a 650 cfm , Holley part # 4777 with a 50 cc pump on the primary side.Ken Thomas
NoT FaDe AwaY and the music didn't die
The simplest road is usually the last one sought
Wild Willie & AA/FA's The greatest show in drag racing
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07-21-2005 06:02 PM #5
If your goal is goin' faster, go with the Holley. I don't see many Edelbrocks on the bracket race cars at Firebird.PLANET EARTH, INSANE ASYLUM FOR THE UNIVERSE.
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07-21-2005 06:10 PM #6
Tech, there were lots of Edelbrocks (AFB) carbs at Firebird....in the 1960's
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07-21-2005 06:53 PM #7
Thanks Guys,
Go fast is the ticket Got some 5.0 Mustangs and stock Camaros that I want to terrorize with my little old 305
Charles
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07-22-2005 07:59 AM #8
just a question.....
Why would he need a 50cc acc. pump on that 650dp ?78 malibu
86 corvette
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07-22-2005 07:13 PM #9
Re: just a question.....
Originally posted by Skybu
Why would he need a 50cc acc. pump on that 650dp ?Ken Thomas
NoT FaDe AwaY and the music didn't die
The simplest road is usually the last one sought
Wild Willie & AA/FA's The greatest show in drag racing
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07-23-2005 09:38 AM #10
WOW.....
That is a huge pump shot for a 650dp. Do you remember what acc.pump cam you used (color) and on what # position the cam was on?78 malibu
86 corvette
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07-23-2005 07:16 PM #11
That's been about ten years ago, but if I remember right the cam was pink, 67's in the primaries, 76's in the secondaries and I don't remember which squirters I used. The manifold was an Offy 360 and I ran a set of Hedman shortys and a 454 flywheel.Ken Thomas
NoT FaDe AwaY and the music didn't die
The simplest road is usually the last one sought
Wild Willie & AA/FA's The greatest show in drag racing
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Welcome to CHR. I think that you need to hook up your vacuum advance. At part throttle when cruising you have less air and fuel in each cylinder, and the air-fuel mixture is not as densely packed...
MSD 8360 distributor vacuum advance