Forge Motorsport Intake Hose

[chumly]

I wonder why he is interested whether the inside is ribbed or smooth? Need any KY?

[jetfuel]

..just curious about the inside of the hose ...because if the inside of the hose is ribbed like a Trojan then the air will be as disturbed as some of the SCOA members ....

jetfuel...totally ribbed

[GHammerly]

LMAO
Yeahh, serious performance talk hehehe!

[Smart Enuf]

The ribbing is for your driving pleasure...

[chumly]

See what you started!

[BARNEY O]

And Tigerwong hasn't been on all evening to defend himself against us loonies. Time for the rubber room ,Good nite

[chumly]

Originally Posted by BARNEY O

And Tigerwong hasn't been on all evening to defend himself against us loonies. Time for the rubber room ,Good nite

You got a whole ROOM for them? WOW!

[geosynch]

Not to spoil all the fun going on here, but dimpled or ribbed isn't necessarily bad for airflow.

Dimpling could -- and I mean could, not will -- set up a laminar airflow layer that might actually improve airflow.

Don't believe me? Ever wonder why a golf ball is dimpled?

Now the golf ball is an example of a sphere. The flow inside a tube will be different, but the same effect is still possible. It will be a function the ratio of the diameter to the length of the tube. And it has been wa-a-a-a-ay too long since I took Fluid Dynamics to remember. But if the diameter/length ratio is in the correct range, and as long as we are not talking about supersonic flow (which we aren't for an intake) then dimples in fact will improve the flow.

Strange but true.

geosynch

[tigerwong58]

OK, I wake up get to work and see all these replies.

The inside is VERY SMOOTH, no ribbed feel. I knew I should have taken a picture. I'll take it off and take a picture tonight and post it.

[John_H]

Originally Posted by geosynch

Dimpling could -- and I mean could, not will -- set up a laminar airflow layer that might actually improve airflow.

Don't believe me? Ever wonder why a golf ball is dimpled?

The article you cite reaffirms what I know: dimpling does not set up a laminar airflow layer, it specifically changes the laminar flow to turbulent flow. This allows the flow to stick to the back surface of the golf ball longer, pushing the ball forward more effectively than the laminar case which separates from the back of the ball too quickly, losing that push.

In a hose, there's no pressure loss from "separation of flow" so the only benefit from tripping the flow from laminar to turbulent would be the added friction and, therefor, added pressure with a resulting reduced flow.

John_H
... Degreed [non-practicing] Aerospace Engineer ...