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Schedule 10 Turbo Manifold Merge Collectors



Turbo Manifolds

When it comes to turbo manifold design there is actually a lot more to it then just connecting all of the exhaust ports together to feed the turbo. The reality is there is a lot more physics at play. The exhaust flow, pressure, and runner length are all very important in deciding the many characteristics that make up a turbocharged car.

The idea behind a turbo manifold is to collect all of the exhaust gases from the motor to a common turbo flange where the turbo may be bolted. 

Log Manifold

The log type manifold is the most economical manifold on the market. They are almost bullet proof when it comes to reliability and they are the most compact manifolds available. Most manifolds you find on factory turbocharged cars are log type manifolds. This is understandable when you figure a manufacturer is all about reliability. When it comes to performance, a log manifold will leave you wanting. All of the exhaust gases flow into a common plenum where they often collide with each other causing a lot of turbulence before the turbo. This hurts the turbo’s performance and hurts the motors performance as well being that a log manifolds common plenum is so close to the other cylinders, it causes a lot of back flow of exhaust.

Tubular Manifold

A tubular manifold is one that is custom made for that particular users goal for the car. Most road racing cars will build an avg. runner, equal length manifold that will support great flow characteristics throughout the entire rev range. A car being set-up for drag racing will use a long runner tubular manifold, which will favor flow in the upper rev range. Tubular manifolds are VERY efficient when compared to a log manifold. They offer superior flow characteristics, and offer less back flow of exhaust gases back into the motor. 

Now for the negative: tubular manifolds are often prone to cracking causing them to lose points in the reliability column. For those focused on getting the most performance they can, a tubular manifold is a must.

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