carb
carb
Postmaster
Joined: Mar 2005
Posts: 2,949
Likes: 6
From: Earth
600cfm is more than your usual 300 will ever really need since it's probably not going to be revving above 4500-5000.
Are you considering a single or dual plane manifold?
I've got an Offy single plane and an Edelbrock 500cfm and I'm battling a lean bog at WOT. Do yourself a favor and splurge on a wide-band O2 sensor when you're ready to tune. I haven't fiddled with Holley carbs much, but I'd wager you can tune a 600 to work with your proposed set-up.
Are you considering a single or dual plane manifold?
I've got an Offy single plane and an Edelbrock 500cfm and I'm battling a lean bog at WOT. Do yourself a favor and splurge on a wide-band O2 sensor when you're ready to tune. I haven't fiddled with Holley carbs much, but I'd wager you can tune a 600 to work with your proposed set-up.
Postmaster
Joined: Dec 2006
Posts: 3,603
Likes: 10
From: Spokane, WA
470 cfm truck avenger would probably be a good size and can be had on holleyperformance eBay auction at a decent price as long as you don't get in a bidding war. Otherwise they are a bit spendy.
I just bought an 0-1848-1/4160 465 cfm for less than $180 including shippng. I'll convert it to an electric choke and quick change vac secondary spring and start the tinkering.
I just bought an 0-1848-1/4160 465 cfm for less than $180 including shippng. I'll convert it to an electric choke and quick change vac secondary spring and start the tinkering.
Postmaster
Joined: Dec 2006
Posts: 3,603
Likes: 10
From: Spokane, WA
Bummer BVA. IIRC Edelbrock has a carb tuning manual and maybe even a DVD or you might try this http://www.themotorbookstore.com/9781932494365.html. Or give the Edelbrock Techs a call and see what they suggest.
With my present carb (see signature) my foot has to be in control of when to go WOT...too slow a speed and I get a hesitation at the transition but with a little less aggressive movement on the throttle the transition is fine...even smooth with good acceleration.
With my present carb (see signature) my foot has to be in control of when to go WOT...too slow a speed and I get a hesitation at the transition but with a little less aggressive movement on the throttle the transition is fine...even smooth with good acceleration.
Postmaster
Joined: Mar 2005
Posts: 2,949
Likes: 6
From: Earth
Don't mean to hijack the thread here, but...
No worries, I just don't have time to fiddle with it during the week. I'm going to advance the timing a couple of degrees, I think the vacuum drop at WOT is retarding everything too much, plus I'm not getting any knock even though things are really lean at cruise/part throttle. I just picked up a couple (more) sets of metering rods and accelerator pump nozzle kit from the speed shop today. It's just a matter of trial and error. It may take a month but I'll lick it.
No worries, I just don't have time to fiddle with it during the week. I'm going to advance the timing a couple of degrees, I think the vacuum drop at WOT is retarding everything too much, plus I'm not getting any knock even though things are really lean at cruise/part throttle. I just picked up a couple (more) sets of metering rods and accelerator pump nozzle kit from the speed shop today. It's just a matter of trial and error. It may take a month but I'll lick it.
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Postmaster
Joined: Dec 2006
Posts: 3,603
Likes: 10
From: Spokane, WA
twwTruck: Ask yourself what you are going to do with your vehicle and plan your build around that. Do a bunch of reading on this Forum and the FSP Forum then make a plan of what you want to do, run it by the Forum, adapt and improvise and go from there.
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