Intake manifold

[Ridgeline]

I'm getting ready to start building a 350 for my ElCo. I'm looking to get around 300 -350 horse power. What is the best intake to use with a 600 Holley?

 

[megaladon6]

match the intake to the heads, then match the carb to the entire package. IMO i'd go up to a 650cfm if you insist on a holley, but i'd highly recommend getting a late 70's/early 80's non-computer q-jet. then you PROPERLY modify it and tune it, and you'll have the same power and better driveability.

 

[dan2286]

It would help to know if you are building the engine for street or strip, low end power or high end power.

 

[custom442]

I'm getting ready to start building a 350 for my ElCo. I'm looking to get around 300 -350 horse power. What is the best intake to use with a 600 Holley?

The best way to go is a dual plane, Edelbrock makes one with an Air Gap for a little better performance. You would need a stall converter at least 1,000-2,000 for this one, but it's the best type for the street. Make sure it complements the heads you are running. If not you could loose a lot of power (call the company to make sure).

When considering the manifold - ask yourself what rpm range you want the driving in. If you aren't turning above 4500-5000 rpms, a regular single plane could be a better choice. The dual plane will give you a bit more torque. Another thing which is interesting - a hi po single plane will make less low end torque, and achieve peak power at a higher rpm band (a regular single plane will make top end power at a lower or similar rpm than a dual plane). So the dual plane would be a no-brainer if you have a stall. (other ones - like a tunnel ram are too radical for the street and amnt. of power you are running)