Thread: S & B or LMI
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Old 11-18-2013, 10:42 PM
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Quote:
Originally Posted by macc08 View Post
did you order through bully's? if so, how much total?
For the entire intake through us is $264 delivered, if you find a lower price we will match it or beat it. http://bullysperformance.com/dodge-r...nufacturer=101.

The SRI's almost always give more horse power, as it is not just how cool the air is, however the air velocity and how smoothly it gets to the engine, here are some very good posts from a fellow member in another thread explaining it much better than I can.

Quote:
Originally Posted by CdnoilRAM View Post
The best short ram intake you can get is one that draws from a fresh air source, by design accelerates the air flow along its length and resists thermal absorbtion into the air flow. The best short ram intake ever made for the hemi engine is the Legmaker 'Hammer' intake or the old BFI for the trucks.

So, talking about flow velocity: Because of the 'keg style' intake manifold we have, the higher the intake velocity you have entering through the throttle body, the more air you can move into the combustion chambers in the given open intake valve period. The intake manifold takes care of flow acceleration with its active short/long runner settings, but you want to get as much air flowing into the intake manifold as possible.

Since a N/A engine generates vacuum, this is how it moves air into the combustion chamber, by creating a pressure differential between the cylinders and intake manifold. The intake manifold must replenish its volume regularly and it does this through an intake, and is throttled by the throttle body. The speed at which the manifold replenishes its volume determines its efficiency. An ideal intake tube design reduces the flow restrictions, surface drag, and allows for laminar air compression along its length.

An ideal intake will have a large opening to atmosphere, preferably with no intake restriction (not practical since we want filtration as well), gently reduces its diameter through a cone shape that will allow for the compression of the air flow, which increases velocity of the flow, and made of an internal surface that reduces the effect of the no-slip condition. Smooth surfaces are not ideal, a contoured surface that reduces the detachment and shear away speeds is best.

Most Cold Air Intakes are just that... they route air from outside the engine bay through a tube to the throttle body. As stated in previous posts, the Vararam does this very well, but it doesn't do anything for the flow velocity as there is no runner length to increase the intake velocity. It does have a much larger reservoir capacity compared to most cone filters, but the tiny hole it has to move air through doesn't impress me at all.


Quote:
Originally Posted by CdnoilRAM View Post
Actually, a short ram intake will always give you better flow, it's a characteristic of their design. Intake air temps aren't the same as the ambient air temp except at highway speeds in the short ram intake design because of heat soak. It's a minimal change, <10 deg, but a change none the less.

The Vararam just gets closer to ambient intake temps because it's a shorter travel distance and you see less heat soak into the intake air pocket compared to most short ram CAIs that use a plastic or aluminum mid-tube. If you want the best mid-tube heat characteristics you want to look at a carbon fiber tube, they don't heat soak and don't pass that heat into the intake air charge.


hope this helps you all get the benefits of SRI's
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