New carb suggestions
Thread Starter
Burning Brakes
Joined: Aug 2001
Posts: 1,002
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From: Bay City MI.
New carb suggestions
I am getting tired of adjusting my Holley 780 vac secondary carb. The choke is a real pain too, its not electric. I have heard that Rochester carbs are great to work with and also Edelbrock performers. Looking for advice from fellow BB's
Safety Car
Joined: Apr 2002
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From: No link, No dupe
Re: New carb suggestions (467-Ratman)
I've owned a few Carter AFB's. They are the same as the Edelbrock carb. They are much easier to tune than a holley, and any adjustments can be quickly made. If you ever have to rebuild it, it has very few parts compared to other carbs. In my experience, holley carbs offer a slight edge in performance, but the Edelbrocks are close behind. In fact, you probably won't notice any performance difference.
One last thing. The Edelbrock has no power valve to blow out, like the holleys do.
One last thing. The Edelbrock has no power valve to blow out, like the holleys do.
Racer
Joined: May 2000
Posts: 315
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Re: New carb suggestions (467-Ratman)
Personnaly, I'd get rid of the vacuum secondary and go with a mechanical secondary MSD distributer, etc.
As for a carb, you can go with a Holley 850 DP with Electronic choke -- or if you want to go the ultra-simple route, you could get an Edelbrock 800 or 850, whatever they have with electronic choke.
I currently have a 1050 Dominator, but have used normal Holley DP's and Edelbrock as well.
As for a carb, you can go with a Holley 850 DP with Electronic choke -- or if you want to go the ultra-simple route, you could get an Edelbrock 800 or 850, whatever they have with electronic choke.
I currently have a 1050 Dominator, but have used normal Holley DP's and Edelbrock as well.
Thread Starter
Burning Brakes
Joined: Aug 2001
Posts: 1,002
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From: Bay City MI.
Re: New carb suggestions (shotgun_000)
Thanks to all for the info, how about the Edelbrock performer series? I think the Holleys are cool looking but seem like a pain in the butt!
Le Mans Master
Joined: Mar 2002
Posts: 7,056
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From: Life is Messy, Bring a mop
Re: New carb suggestions (gkull)
How's the lack of choke affect you on cold days? I've been looking at the Demons too. I keep reading good things about them but hate to put up with cold starts and no choke.
:confused:
:confused:
Safety Car
Joined: Apr 2001
Posts: 3,581
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From: Spring, Texas
Re: New carb suggestions (72rdstr)
I have no choke on my Holley 800. Year-round, all it takes is two pumps of the gas pedal and she will fire right up and idle. Of couse, Texas winters are not known for being very cold. We just call it a cooling-off period. :lol:
In contrast, I can't help but agree with the power valve and other tuning issues that come free with Holley carbs.
In contrast, I can't help but agree with the power valve and other tuning issues that come free with Holley carbs.
Thread Starter
Burning Brakes
Joined: Aug 2001
Posts: 1,002
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From: Bay City MI.
Re: New carb suggestions (SharkAttack)
The motor is pretty cold blooded, but after about a minuite or two its ok. Michigan can be pretty cold in the mornings! I am sure my neighbors love me in the early mornings when I first start it!!!
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Drifting
Joined: Jun 2001
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Re: New carb suggestions (467-Ratman)
I'm don't have a BB, but got tired of messing with my Holley and went with a Edelbrock performer. So far it been good so far, ran good when I got and have been able to tune it for better performance. :yesnod:
To date after rejetting I can go past 6000 RPm in 1st and 2nd with no problem. Anyway I recommend them.
To date after rejetting I can go past 6000 RPm in 1st and 2nd with no problem. Anyway I recommend them.
Racer
Joined: May 2002
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From: GA
Re: New carb suggestions (Tominator)
467 Rat man, You should look at the holley HP series.They make great power and are tunable. Looks like you have a lot of High performance parts you need a high quality carb to get the most out of your motor. :)
Safety Car
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Re: New carb suggestions (467-Ratman)
Glenn454, Is the Holley HP the same as the Avenger series? Does Jegs have them or Summit? Thanks.
The number is 1-800-345-4545
http://www.jegs.com/
Hope this helps! :chevy
Racer
Joined: May 2002
Posts: 352
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From: GA
Re: New carb suggestions (467-Ratman)
The Avenger carburetors are new. Probably a better street carb than the HP holley. They have a choke. The HP holley is for all out performance, they do not
have a choke. I have run into problems with holleys with a choke tower on corvettes. The drop base air cleaner top lid comes down to low and sits near the top of the choke tower resticting air flow and killing power. Jegs and summit have both carbs. Good luck. :)
have a choke. I have run into problems with holleys with a choke tower on corvettes. The drop base air cleaner top lid comes down to low and sits near the top of the choke tower resticting air flow and killing power. Jegs and summit have both carbs. Good luck. :)
Thread Starter
Burning Brakes
Joined: Aug 2001
Posts: 1,002
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From: Bay City MI.
Re: New carb suggestions (shotgun_000)
I was told by Jeg's that a Edelbrock 750 would be a good choice for good response around town and still have plenty of top end. He said if I went with an 800 or 850 it would have great top end but really suffer at 2500 or below. Any ideas on this topic?
Team Owner
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Re: New carb suggestions (467-Ratman)
I just give mine a couple of pumps and it fires right up. It won't idle till it's run for a little bit on very cold mornings. I just fire it up and go it's a 25 mph housing area so i idle it out to where I jump on the highway.
Ratman you have a pretty big cam and lots of cubes. I have a 383 and a 825 cfm race Demon. I can floor my car at 2000 rpm and it never even does a hickup. It just goes.
I had a Edel. 750 electric choke for ten + years. The choke quit after a few years and i replaced it. Then it quit again so I yanked it all off. I haven't had a choke since. If you have good ignition and your car is in tune. I've never had a problem at zero degrees
Ratman you have a pretty big cam and lots of cubes. I have a 383 and a 825 cfm race Demon. I can floor my car at 2000 rpm and it never even does a hickup. It just goes.
I had a Edel. 750 electric choke for ten + years. The choke quit after a few years and i replaced it. Then it quit again so I yanked it all off. I haven't had a choke since. If you have good ignition and your car is in tune. I've never had a problem at zero degrees
Thread Starter
Burning Brakes
Joined: Aug 2001
Posts: 1,002
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From: Bay City MI.
Re: New carb suggestions (gkull)
Thanks gkull, I have never minded not having a choke, its cool to fire it up and here it bark and spit! Maybe the Edelbrock performer 800 or 850 would be a better choice?
Melting Slicks
Joined: Jun 2001
Posts: 2,429
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From: CA
Re: New carb suggestions (467-Ratman)
If your max rpm is 6000, your motor would require an 810.7 cfm carb. I would go with the 750.
If you plan on keeping the dual plane intake, you could probably get by with an 800/850, but your
intake velocity would be down.
Carb size formula:
Engine displacement x Max rpm / 3456 = 100% VE
IE: 467 x 6000 / 3456 = 810.763
One thing to keep in mind if you install an 800 cfm carb, but decide to only spin the motor to 5,000 rpm, your VE would only be around 84%.
[Modified by 71coupe, 9:49 AM 5/26/2002]
If you plan on keeping the dual plane intake, you could probably get by with an 800/850, but your
intake velocity would be down.
Carb size formula:
Engine displacement x Max rpm / 3456 = 100% VE
IE: 467 x 6000 / 3456 = 810.763
One thing to keep in mind if you install an 800 cfm carb, but decide to only spin the motor to 5,000 rpm, your VE would only be around 84%.
[Modified by 71coupe, 9:49 AM 5/26/2002]
Race Director
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Re: New carb suggestions (467-Ratman)
If someone is having to adjust a Holley all the time, something is wrong. I've run them for years and just don't have much problem. I've also been running a Dominator for the last 8 years or so and if that thing doesn't cause any grief, then for sure a 780 shouldn't.
Maybe the idle screws are worn out or the o rings that seal them. They shouldn't move otherwise. There just isn't much togo wrong with them. Check for vacuum leaks. Every OEM mfg. in the U.S. has installed them from the factory and they work fine.
With your combo I would also go for a mechanical sec. carb. A 4779 750 DP is about the most universal thing out there. The 830 annular is also a great street carb. You really need to think in at least the 850-950 cfm range if you truly plan to spin that dude into rectangular port rpm territory. If not use the 750 or 830.
The Edelbrocks are great carbs, but just look funky unless you have two of them on there!
Jim
Maybe the idle screws are worn out or the o rings that seal them. They shouldn't move otherwise. There just isn't much togo wrong with them. Check for vacuum leaks. Every OEM mfg. in the U.S. has installed them from the factory and they work fine.
With your combo I would also go for a mechanical sec. carb. A 4779 750 DP is about the most universal thing out there. The 830 annular is also a great street carb. You really need to think in at least the 850-950 cfm range if you truly plan to spin that dude into rectangular port rpm territory. If not use the 750 or 830.
The Edelbrocks are great carbs, but just look funky unless you have two of them on there!
Jim
Thread Starter
Burning Brakes
Joined: Aug 2001
Posts: 1,002
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From: Bay City MI.
Re: New carb suggestions (71coupe)
71coupe, Thanks for the info on the formula. I know this motor is a high rpm breather, but to be honest, I dont think that I will be spending much time at 6000 rpm's! I plan on driving it, but don't wont to loose my drivers license! Sounds like a good 750 would be tough to beat for all around performance and still spin it to 5500 rpms or so?
Drifting
Joined: Jun 2001
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Re: New carb suggestions (467-Ratman)
My performer ran good with no adjustment, but I ended up buying the tuning kit for it (jet, rods, springs) and it really helped in tuning it.
If you end up buying one, the kit for the non-choke carbs are better for performance (bigger jets) at least with the 600 series.
If you end up buying one, the kit for the non-choke carbs are better for performance (bigger jets) at least with the 600 series.