Port Dimpling??

[mgbrv8]

You know for years I've seen snippets of people dimpling their intake runners after porting. Logically it makes sense because it's the same system that a golf ball utilizes. When you think about its the basics of Bernoulli's principle. Basically what you're doing is reducing the size of the turbulence on the walls of the runners there by inducing laminar flow and decreasing the pressure of the air forced into the runner. As a result you have more volume of air at any given velocity to cram into the cylinder. Sharks also utilize these mechanics with there skin. We all have heard that a mirror finish will never flow as well and one with a light texture. I have yet to see a definitive study on a flow bench. Just claims and few sheets but not a in depth study? I think there is a chance of great power returns that can be gained here I might throw this into my already large pile of projects. ;-)

just spit balling

David Hetrick

[BigJohn]

Cool looking!

I think you want controled turbulence not lessened.

[mgbrv8]

That the idea John all surfaces crate turbulence this is taking large turbulence and making it smaller there by increasing the useable volume in the runner.

https://www.youtube.com/watch?v=XkaLsVOrBk0

Dave

[mike100]

according to the attached picture-
1-2 hp across power curve (ok, for no costs spared competition maybe)
replace valves every 20 hours???

[batchman]

Originally Posted by mike100

according to the attached picture-
1-2 hp across power curve (ok, for no costs spared competition maybe)
replace valves every 20 hours???

I read that as 1-2hp attributed to the valves alone.

20 hours is not a bad cycle time in pro racing, well up to endurance racing anyway...

- Jeff

[mike100]

Originally Posted by batchman

I read that as 1-2hp attributed to the valves alone. mmm ok, I see your point that maybe the port gains would really add up too.

20 hours is not a bad cycle time in pro racing, well up to endurance racing anyway... I thought about that after- the target market would be high end engine builders mostly

- Jeff

replies in red...
I wonder how they do with carbon build up on the intake valves?

[mgbrv8]

Originally Posted by mike100

according to the attached picture-
1-2 hp across power curve (ok, for no costs spared competition maybe)
replace valves every 20 hours???

I agree Mike I should have erased that text it seems a touch unresearched and that's one of my points.People make claims without research. I mainly wanted to show just the valves. concerning the carbon build up, with better laminar flow maybe the possibly of build up is less in theory.

Dave

[LGAFF]

I can do dimpled ports, you just don't clean it up with a flap wheel or cartridge.

[mgbrv8]

HA!!!

[Tony Davila]

Myth Busters dimpled the exterior of a car to see if it reduced drag? Who is first to dimple their Z? Gentlemen get your ball peen hammers and get a swinging.


It is kinda funny, this theory probably works but when you think of it in these terms i.e. a hail damaged car (lots of dimples) having a lower wind drag due to hail damage is funny.