Need help identifying Holley Carb

[Stunt Lee]

This car is still very new to me and I'm trying to figure out exactly what I have. Can anyone identify this Holley carb? I can't find a part number on it that matches anything I see online. Thanks in advance.

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[lewtot184]

look for some numbers stamped on the choke tower. i'm gonna say 3310-1.

 

[super-bee_ski]

If it's a 3310-1 as lewtot184 says it's probably a 750
What size engine is in the Charger?
440 or 383?

 

[Photon440]

Look for the info on the air horn, it should show a list number-

 

[Stunt Lee]

OK I'll take a closer look for those numbers. It's a 440 with a hot cam, ported heads and INDY intake manifold. Built for drag racing and tuned for 100 Octane. I need to tune it to run on pump gas.

 

[66Satellite47]

I am going to guess 3310-2. If it's a 3310-1, does that mean a 780 cfm, due to the thin throttle blades? Stunt, be sure to figure out what your real compression ratio is before going to pump gas. The issue for octane isn't the "tune", it's the compression ratio. If the motor really was built to run 100 octane (high compression 11 to 12:1). An iron head 440 will need to be more like 9.0:1 to run on pump premium. Good luck.

 

[62MAX]

I am going to guess 3310-2. If it's a 3310-1, does that mean a 780 cfm, due to the thin throttle blades? Stunt, be sure to figure out what your real compression ratio is before going to pump gas. The issue for octane isn't the "tune", it's the compression ratio. If the motor really was built to run 100 octane (high compression 11 to 12:1). An iron head 440 will need to be more like 9.0:1 to run on pump premium. Good luck.

It's either a 3310 or a 3310-1,the 3310-2 and up didn't have the secondary metering block,had metering plate instead.

 

[66Satellite47]

"It's either a 3310 or a 3310-1,the 3310-2 and up didn't have the secondary metering block,had metering plate instead."

OK, thought the -2's still had the metering block. The 3310 & 3310-1's were a really good piece. I had a -1 on my '70 Barracuda streeter with a DP4B & ran great.

 

[Stunt Lee]

It's a 10.5:1 compression. Sorry forgot to mention that. Here's what I know what done pertaining to the engine. Pretty sure I'm going to swap out the hot cam to make it more streetable.

10.5:1 compression ratio flat top pistons
balanced
Moroso 7 quart oil pan
Mopar performance purpleshaft cam 292 duration 509 lift
2.14 intake valves 1.81 exhaust valves
hardened seats on both intake and exhaust valves
roller rockers
ported cylinder heads
INDY intake manifold
Hooker super comp ceramic coated headers 2" primary tubes in to 3 1/2 collectors
flow master 3" dual exhaust kit

 

[Meep-Meep]

The older 3310's have the down leg boosters while the newer ones have the straight ones. The down leg boosters are the least restrictive thus flowing more CFM.

Good luck on the 10.5:1 CR and pump gas. However, that .509" is blowing off a lot of cylinder pressure so that might help at low speeds.

 

[Stunt Lee]

Ok so it is a 33101. Do you guys think this carb will flow enough to run on pump gas? Any recommendations on a cam to go to. Need it to be very streetable on 93 Octane but that will still provide good performance at lower RPMs. Thanks.

 

[fwi]

It's a 10.5:1 compression. Sorry forgot to mention that. Here's what I know what done pertaining to the engine. Pretty sure I'm going to swap out the hot cam to make it more streetable.

10.5:1 compression ratio flat top pistons
balanced
Moroso 7 quart oil pan
Mopar performance purpleshaft cam 292 duration 509 lift
2.14 intake valves 1.81 exhaust valves
hardened seats on both intake and exhaust valves
roller rockers
ported cylinder heads
INDY intake manifold
Hooker super comp ceramic coated headers 2" primary tubes in to 3 1/2 collectors
flow master 3" dual exhaust kit

That cam should not prevent you from running 93 octane.

 

[coloradodave]

Great guess, Lew. You win the prize, which is in the mail...lol. Lee, the 3310-1 is a 780 CFM vacuum secondary carburetor, one of the best all around street carbs that exist.

 

[lewtot184]

the 780 vacuum holleys were extremely versatile. quick fuel makes a 780 vacuum "clone" of the holley version. they have the same venturii and throttle bores of the 800dp holley. i think a little more power can be had by going to a larger carb but i don't think the cost could be justified for the power gain.

 

[Stunt Lee]

Excellent thanks everyone! Sorry I'm such a newb. I've been around European cars my whole life so American Muscle is foreign territory to me, ironically. Well I feel good knowing that this is one of the better street carbs on the market. Now, what cams should I look at to match it? Thanks again!