[logan1]

I was wondering if a Holley 3310-4 750CFM carb would be too much carb for my 350 build There is a guy selling a used carb locally for approx $125.

The engine is a SBC 350 for a Datsun 240z. The motor will have a stock 2 bolt main bottom end with all new bearings. I will be using a set of vortec 350 heads and a vortec intake. Stock rocker arms and push rods. The cam will be an Xtreme Energy 268 cam. (Duration @ 0.050":224° / 230°; Max Lift w/ 1.5RR: .477" / .480")

The car is going to be a 99.99% street car with very very lil track time.

http://www.compcams.com/v002/Pages/388/XE268H-10.aspx

[Scandinavian]

Originally Posted by logan1

I was wondering if a Holley 3310-4 750CFM carb would be too much carb for my 350 build There is a guy selling a used carb locally for approx $125.

The engine is a SBC 350 for a Datsun 240z. The motor will have a stock 2 bolt main bottom end with all new bearings. I will be using a set of vortec 350 heads and a vortec intake. Stock rocker arms and push rods. The cam will be an Xtreme Energy 268 cam. (Duration @ 0.050":224° / 230°; Max Lift w/ 1.5RR: .477" / .480")

The car is going to be a 99.99% street car with very very lil track time.

http://www.compcams.com/v002/Pages/388/XE268H-10.aspx

Go fore it!

[logan1]

ok so i got over my lazyness an ddid a lil more research and found this formula:

The math formula is: CARB CFM = (CU.IN. X RPM divided by 3456) X VE%

So for a SBC 350 : [(350 cu.in * 5500 rpm) / 3456]*75% = 417.75 cfm


wow that number came out to be a lot smaller than i expected.

[bentwings]

The vacuum sec will help a bunch. Just get a spring kit.

[Irelands child]

If you are still in the build phase of that car, I would think about waiting for something like a 0-1850, 600cfm or maybe an Edelbrock 1405 or 1406 also 600cfm. Hit the bigger swap meets as there are usually tables full of Holley carbs, many needing nothing more then a $25 kit along with a wash job.

[lg1969]

The car is light weight. That carb was used on Z28 Camaro. it work fine.

[matts37chev]

Originally Posted by logan1

wow that number came out to be a lot smaller than i expected.

it always is
you are not the first to say that

[eric32]

You would be able to get the 750 to work with your engine it might cost some fuel mileage a little. If you look on ebay a better bet would be as recommended above a holley 600cfm vacuum secondary model 1850 which is a manual choke or the 80457 which is the electric choke version either one of those will give you a little better throttle response and a little more fuel mileage for cruising. I have a 350 with rhs pro action heads weiand speed warrior dual plane intake with a lunati voodoo 262/270 211/219 @ 50 507/515 lift and I ran a edelbrock 750 once and it did do good but my holley 600 gave me better mileage and throttle response and for your mild combo it would work better but the 750 can be tuned to work with your motor so if you can get a good deal you can go for it but try to check out ebay they have some good deals on the holley 600 vacuum secondary for around the same price.
Eric

[454C10]

I ran a 3310 on my 350 powered 240z and it worked great.

When I first did the conversion it ran a 12.7 at 110 mph, over the years I increased the power until it finally ran 10.7 at 135mph. All with the same carb.

I have run the 3310 on mild to wild 350's and, mild 396 to 454's BBC. This carb can be set up to run on almost any engine. Very easy to tune.

[poncho62]

I had a 600 Holley on my 55 Chevy, 350, 4 speed.....Swapped it for a 780, really woke it up.

[327NUT]

Probably one of the best all around street carbs available. Just make sure it's dialed in for your engine combo......you'll never regret it.