removing material from #4 exhaust port

 

 

 

once that material is removed, port 4 resembles 1 through 3....

 

 

 

 

and a final look @ the intake side....

 

 

 

more to come..... :D

 

eeeeew.... quite a bit of sludge here..... its a good thing this head, and all the hardware are getting cleaned

 

a fair bit of sludge inside the VVL followers as well.....

 

 

 

 

 

a fair bit of sludge inside the VVL followers as well.....

 

plugged pretty solidly.... This is the return plunger oil drain for the VVL' date=' with this plugged, the VVL follower can't engage, because it can't push against this slug.

 

[img']http://ost.ebeans.ch/albums/userpics/10005/plugged_oil_passage1.jpg[/img]

 

Slug is quite accurate, on this VVL follower, when the VVL was pushed, I had to apply substantial effort, and when I did a solid crud slug popped out...

 

 

It wasn't always the return plunger, below is the feed hole to the VVL actuator...

 

 

not going to get a lot of movement when it is substantially clogged.

 

 

 

 

 

more to come..... :D

 

porting and chamber blending all finished, with the new Supertech valves, the chamber volume has grown to 41.3-41.4 cc per chamber... now the head goes out and gets re-surfaced .004". This should shrink the chambers back to about 39.5cc after the cut.

DYING for testing and results!! A work of art on such a worrisome head full of tar and gunk.

now the head goes out and gets re-surfaced .004".

 

 

 

 

before....

 

 

... although 137.02 is confirmed(5.394"),

 

 

 

after....

 

 

 

 

more to come..... :)

How did this pan out with testing mate ?

How did this pan out with testing mate ?

 

 

exhaust:

.100 - 75cfm

.200 - 144

.300 - 177

.400 - 198

.500 - 206

 

 

Intake:

.100 is 85

.200" is 159

.300" is 217

.400" is 249

.500" is 265

 

 

head is assembled... all Supertech hardware

 

 

 

in the process of checking valve clearances on a set of Franklin cams using 2.55mm shims as a base