Carb for a street/strip stroked 440

[dammstrate]

The care in my avatar came with a stroked and 30 over 440, about 500ci. Supposedly "mildly" worked heads, no I don't know what exact kind. 10.5:1 CR, but a pretty hefty cam: 590 intake lift 318 duration, 609 exhaust lift 324 curation, with a 112 lob seperation. It has a holley 850 double pumper, which I despise. Would an 800cfm AVS2 be enough carb for this combination?

 

[496 polara]

The 800 AVS will certainly work but may lose some HP to the 850. Both need to be tuned to be optimal.

What makes you hate the 850?

 

[RemCharger]

To put it bluntly, that's a huge cam for the street. More like a 5000- 75000 bracket cam. The best match would be a 950+ quick fuel Q series .
IMO

 

[PRHeads]

My thoughts are that an Ede avs carb will not have enough idle circuit capacity to provide satisfactory lower speed street manners……with that cam.

Holley makes a lot of “850’s”, some would be better suited for a combo like that than others.

In my mind(and new ones are prohibitively expensive these days) the old school traditional 850 double pumper, number 4781, would be a good fit.
(It would need to be one equipped with 4 corner idle, but they’ve had that for like 30 years now.)
In all fairness, I haven’t put a new one of those on an engine since like 2005.

That being said, I agree the cam is on the rowdy side if decent street manners are on the priority list.
Any idea what the duration @.050 numbers are?
I’d expect that combo to be pretty fussy about having the timing curve set up pretty short.

If it hasn’t been done in a while, I’d suggest re-gasketing the carb.

Edit- I guess if I had to buy something new, I’d probably lean towards a Street Brawler 850.

Edit 2- cam specs look like a Crower 318FDP, but on a 112lsa

 

[Cranky]

I agree....if it's going to be on the street, your carb is too big and so is the cam unless you plan on being a total street hell raiser......

 

[BSB67]

Holley 4781, 850 DP.