B16a cylinderhead development pt7

last picture for now, we will take further pictures as we progress along the way

this  shows the short turn and the inner divider (splitter)

hint :  it is  not bad to slightly widen the short turn , as the short turn tends to have faster speed than the long side of the port,  so  widening = slowing it down
which then makes the delta between long side and short side flow speed more close

better overall  flow and less sheering on fuel mist  that is suspended in the airstream

B16a cylinderhead development pt6

pardon the lighting glare :

this is to show  the short side  radii  and port side walls   
extremely important  to have  a nice  gentle transition (bend)  into the valve
as flow does not like to turn abruptly

a picture with less lighting glare :

as mentioned  the importance of a gradual bend  to help maintain good flow
more so  that  mist/liquid droplets  like it even less to make abrupt turn

so transitioning well is paramount

B16a cylinderhead development pt5

this  angle  is for better visualizatin  on the work done (current unfinished state)

improving the overall  port transition from port entry to bowl/throat  to seat

currently :  bowl , throat and short side radii  work has been started

here's a picture from the chamber side  into the intake ports

better view of the bowl/throat  and the reshaping its taken for a better transition into the valveseats  

critical to note :   valve to throat  ratio is important  in targeting speciifc rpm range
                         and camshaft profile used  , without overshooting the size
                          and risk  lower torque result and less than desireable power figures

B16a cylinderhead development pt4

a better shot of the intake port (slightly lower camera)

in turn  ,  this  shows a bit more of the short side radii 

and bowl work 

-notice the overall throat's transition to the seat

B16a cylinderhead development pt3

here we show  the current work done to it

bowl work and throat work has been done
and a bit of short side radii  transitioning  also

critical area to work on where  one can make a mistake  in reworking
and suffer power gains  on the top end  or torque  down the midrange

B16a cylinderhead development pt2

here's  the shot of the intake ports in its  stock bare casting form

picture is for reference  with the finished work as we take pictures during the whole progress of the work

B16a cylinderhead development pt1

here's  a picture of the bare head  after cleaning  with detergent and blow drying with compressed air ,  ready to go thru the dirty work of porting  :)

quick spec' of the work

b16a cylinder head  to recieve port work by us 
will run buddyclub 3  cams  

block will be a stock JDM b16a (p30 pistons)
P30 intake manifold  ported through out, with plenum work and reweld
typeR 4-1 header 

target is emphasized on producing torque early in the rpm band
to carry  power better  into vtec transition 

improved flow on the ported intake manifold should help boost peak power too