B16a cylinderhead development pt 14

A picture in larger scale  meant to be more of a "showcase" of sorts

on our basic "street" cylinder head development package
and our  All out Race cylinder head development package

it is standard procedure  to  disassemble the rocker arms , clean them
inspect all vtec pin per rocker set and shaft  and ensure a clean rocker assembly

they say "cleanliness is next to godliness"  and so  we maintain this standard
as we tip our hat to the car gods and bless us with more power :)

note*  that others or shops  tend to just dump the rocker arm assemblies
         into a tupperware/plastic tub  during the porting procedure
        and just reinstall them when done ,   that is a big NO NO  for us
     
        cuz  we'd have no control  in taking notice of debris or foreign objects
       contaminating the oil, let alone the valvetrain being  one of the most stressed
       components of the engine , adding dirt to the oil  will just lead to premature engine
      life/durability

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currently at the time of publishing this,

the head is done  from the machineshop, fully assembled  , leak tested
and installed on the b16a block of our costumer's daily ride

we have conducted  the initial phase of street tuning  (ecu tuning) 
and so far it looks promising, as we are nearing the max of the 240cc stock injectors
 at  about 7k rpm WOT  ;)

will conduct  further tuning once the ported P30 intake manifold is done and installed

hopefully  a dyno session in the near future when all is said and done

so we can share with our readers, the data and results  :)

B16a cylinderhead development pt.13

here's the finished product/project  

- b16a cylinderhead  fully developed by SRDmotorsports
 
specific use : b16a stock internal/block  stock 1600cc displacement
                      stock compression  (no block milling or head milling)

 goal             : Improve efficiency , and significantly increase fuel economy
                      inherent byproduct of the above,  will be the following,
                    : promote early torque development in the rpm range
                    : carry over to the mid range and increase top end pull

as stated in the begining of this project , performance parts used are :

Buddyclub Spec3  cam ( a step over CTR cams , close to skunk2 stage1)

Crower valvesprings to support valve control in the upper rpm's

Ebay TypeR copy 4-1  header

p30 intake manifold fully ported and developed by us (currently being worked on)

here's a variant shot of the parts, with some of the springs  taken out of the box
and rocker arms  during pre assembly 

B16a cylinderhead development pt12

here's  a picture of all 4 intake ports done and textured

-ready for machine work i.e. competition 3 angle valvejob and deck resurfacing

- to ensure  superior headgasket sealing/longevity and OEM valve seals installed

a closer shot of the ports  to show the texture  it has developed into

*it is not smooth  nor very rough, just a fine balance in texture
  where it creates  ideal surface tension to keep fuel into suspension
  and improve  overall flow

* the term "port and polish" is a misnomer , as you dont really polish anything
 but keep the right texture

 on the exhaust yes, you can polish it as mirror finish as you'd likee
 but after a few minutes of idling, let alone  driving...  it will be coverd in carbon byproducts , so texturing the port and keeping the shape uniform and sleek
 is a more important  goal to be set  :)

*so if you hear someone say  they will polish the exhaust  and the intakes not so polished,   slowly and kindly walk away...  as you know  your cylinderhead might end up being a gas guzzler  he he he

B16a cylinderhead development pt11

an excellent visual  to show our followers,   concentrating on the short turn radii

- due to the shot from the chamber side  viewing both intake ports
  it is more evident  the shape  the short turn has taken and the port's sidewalls

- consistency is KEY  even with texturizing the ports  when the final shape is achieved

A more intricate view of the port,  notice  the shape  thats taken around the short side radii

the attempt here is  aiding flow   into the bend/turn without  any abrupt shape or kink
that can manipulate "sheering"  because fuel is held into suspension in the air
as a fine mist, sheering  would mean "pooling"  or losing the fuel suspended in air
and turning to droplets

*as we know,  liquid/droplets  tend to be hard to ignite

* this is the common mistake  when the engine ends up being a gas guzzler
  after  X mods done in Y manner 

B16a cylinderhead development pt10

a nice shot  of the short side radii  , taken from the chamber side into the intake port

the port wall into short turn transition has been shaped  to promote a gradual bend
without  having to remove alot of material that would increase CSA and slow down port velocity ,

with the right  valvejob spec (3angle/ 4 angle) done after ,  this will be a very efficient port design 

B16a cylinderhead development pt9

here's an angled shot to show a better visual on the port shape it has taken

- notice the base of the splitter (top of the splittr in the pic)  the work around it
  it has been shaped but not totally overworked or hogged out
  the keen eye would notice too, that  by doing such work  we get to widen the
 short radii  a little bit and helping the short turn transition altogether

- on the outer side / wall of the port , the short turn radii and bowl transition evident
  and there is still a faint scribe/line of the casting flash / core shift on the head
  this goes to show the amount of portwork/material removal done to the intakes
  which is minimal  ,  to maintain  high velocity at the ports

B16a cylinderhead development pt8

first of all  :  so sorry for the long time gap  inbetween updates on the b16a head
                     we've been busy  finishing it up and processing other projects

here is a shot of the intake port with further work done to it  all through out
texture has been achieved  on a desired level , after i got the shape i wanted 

next picture/shot  has the camera slightly lower  to show more of the short turn radii
and the work done at the base of the splitter (top of the splitter in the pic)
and at the top  the splitter ( in between the guide boss)