Intake question

[Stan]

Will anything be accomplished in terms of increased performance if the intake manifold open ins pictured below are machined to remove the bump inside the plenum of each arm?

 

[Mike Goble]

Not if your head has the matching protrusion. You'd get into some reversion problems. The design of the top of the intake runner is important in getting the incoming mixture around the corner and into the valve efficiently.

 

[E911]

Mike is right, this is by design... one modification leads to many more and as always = $$$

 

[MMercury]

Fluid dynamics has been discussed on this board before. As long as there has been die grinders and internal combustion engines, there will be a desire to try one on the other. Short of redesigning the entire intake path and cylinder head, agree with other opinions regarding this specific modification.

You never know . . . there may still be room for improvement? :wink:




http://e9coupe.com/forum/showthread.php?t=2350

semi-related: http://www.circletrack.com/enginetech/ctrp_1108_combustion_patterns/

http://www.rx7club.com/naturally-as...-220/reshape-combustion-chamber-864087/page3/



Surface turbulence. "Texturing," "Squishing," "Ridging," "Rifling," and "Dimpling."

http://www.turbobricks.com/forums/showthread.php?t=66779&highlight=somender&page=28

http://somender-singh.com/content/view/7/31/




Metric Mechanic

 

[m5bb]

Wow, great images MMercury.
You must have spent some time finding those.

Stan,
Here is a head that Paul Burke does on a CNC machine.
There is a lot of BS in this thread as well. Sorry.
http://www.mye28.com/viewtopic.php?t=109539&postdays=0&postorder=asc&start=0

Those manifolds are made to match to a head with those same "bumps" .

Gary