Log Manifold vs Tubular Manifold

[Si Speed 317]

A common question, although many might not ask it, is "Which is better, a log manifold or a tubular manifold?" Look no further. I have compiled a list of the pros and cons of both log and tubular manifolds.

Log Manifolds
Pros:
- Cheap (in terms of price)
- Easy to make
- Very durable
- Require less work than tubular manifolds
- Allow for fast spooling due to short runners
Cons:
- Not very efficient
- Increased heat
- Yields more torque than tubular manifolds
- Limits size of turbos to smaller sized turbos due to common T25 flange, as well as the lack of clearance of the wastegate actuator to the motor (and in our case, the compressor side won't clear the firewall)
- Limits ~400whp
- More stressful on motor at high boost

Tubular Manifolds
Pros:
- Very efficient
- Doesn't restrict flow
- Achieves power goals quicker and easier than log manifolds
- Durable (stainless manifolds)
- Keeps torque low
- Able to achieve well over 400whp
Cons:
- Expensive
- More extensive/difficult to make
- Boost Creep if manifold is improperly made


If there is anything you would like to add, please post it up! Information is key