302 with dual quads

[Double Venom]

DanEC,
IS that DUAL set up by, "PRICE MOTOR SPORTS?" Ours was by far the most professionally built "After market" product I have ever seen. Bar non...well maybe Wilwood products, Flaming River and maybe a few others. BUT still the best..

DV

[DanEC]

Originally Posted by Double Venom

DanEC,
IS that DUAL set up by, "PRICE MOTOR SPORTS?" Ours was by far the most professionally built "After market" product I have ever seen. Bar non...well maybe Wilwood products, Flaming River and maybe a few others. BUT still the best..

DV

No, they were initially set up by Keith Craft but I've had both apart and done a lot of fiddling with them since - and I have to admit they are base line 1850 carbs. I have them on a 63 - 427 low riser intake. But they do run pretty nice and the intake makes excellent torque. After Holley and Carter introduced their bigger carbs in the mid-60s the need for and advantages of the multiple carb set-ups more or less faded. I know - and agree - that they won't out-perform a good single barrel carb on a good manifold. But they do look sexy and I don't mind spending a little more time setting idle mixture and speed.

A good question to ask yourself to see if dual carbs are right for you is - do you mind running points and setting dwell? If points drive you nuts and seem like unnecessary maintenance and you will only settle for an electronic ignition - get a single carb set-up or fuel injection.

[colubra]

Did speak to previous owner and while he did not recall the exact cfm(might be 600), he said the mechanical secondaries had been disconnected. What issues and concerns would this bring about. Thanks to all as I am learning a lot. Will be able to get pics this weekend.

[cycleguy55]

Originally Posted by colubra

Did speak to previous owner and while he did not recall the exact cfm(might be 600), he said the mechanical secondaries had been disconnected. What issues and concerns would this bring about. Thanks to all as I am learning a lot. Will be able to get pics this weekend.

You can get the carb specifications from Holley if you have the carb number(s). The list number for most performance and factory 2 and 4 barrel carburetors will be found stamped into the upper right hand corner of the airhorn or sometimes called the choke tower. On the 4150 HP models that do not have a choke tower the list number will be stamped into the mainbody behind the throttle linkage. This number is used to identify the carburetor and also used when needing service parts or renew kits. Source: https://www.holley.com/support/faq/

Once you have that number(s), go to http://documents.holley.com/techlibr...al_listing.pdf and you can get the specifications and service part numbers.

[jwd]

Originally Posted by colubra

Did speak to previous owner and while he did not recall the exact cfm(might be 600), he said the mechanical secondaries had been disconnected. What issues and concerns would this bring about. Thanks to all as I am learning a lot. Will be able to get pics this weekend.

Sounds like they are trying to make a terrible set up work. They disconnected them because the engine would bog and die when you stomped on it. A 302 at 100% volumetric efficiency (not usually possible with a street engine)will only flow 567 CFM at 6500 RPM. Even an unstreetable, full out, ballz to the wallz, purpose built race 302 can't flow more than 800 CFM at 7500 RPM.
If you want this car, plan on either getting two correct carbs. or better yet, a single carb. and manifold. What's on there now is garbage.

[colubra]

What would be a solid setup for the single carb and manifold?

[jwd]

Originally Posted by colubra

What would be a solid setup for the single carb and manifold?

Not enough info. to make that decision. Cam? Heads? Trans. gears? Rear Gears?
Intended purpose?
A starting point for a good street engine is a dual plane intake and a 600 CFM carb. with vacuum secondaries.