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enginedoctor

  • Karma: +7/-0
Basic Cylinder Head Service:

     {Hopefully you have  seen "Engine Building Tips #1  thru #4... so we will skip cleaning/inspection}


        1.   build the heads according to your cam spec. card as rec'd, and  engine combination.


        2.   install new valve guides to assure  concentricity and  long life, must be done for  seat work.
              { I prefer bronze guide liners )


        3.   Grind valves and seats to establish correct contact point/flow and tip lenth.


        4.   Check decks for straightness, mill/equalize as needed for equal  "C.C.s".


        5.   Check clearances for valve train.


        6.   I prefer to lap valve/seat prior to  assembly of heads.... ( it assures  a better seal )


        7.   Pre-lube  cylinder head assy and vac.test chambers after final cyl. head assy.


                           This procedure has worked well for me  and I've  done this work my whole life.


                  Above and beyond your basic stuff.... you have  :  porting/polishing ,dusting chambers,
                                                                                       bowl blending/undercutting/ int./ex.
                                                                                       work....and much more!
  • Boat #1: 1970 Horizon Cheby powered Jet
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Ralph Brunt

  • Karma: +51/-0
Re: engine building tips. part 5. "BASIC/COMMON CYLINDER HEAD WORK"
« Reply #1 on: April 15, 2008, 06:30:31 PM »
do you have a flow bench
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CHEAP, FAST, RELIABLE...PICK 2 CANT HAVE ALL 3
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Glasscutter, Skip, OC2  Nordie and many more nail me good every time, relentlessly, I love those guys!

enginedoctor

  • Karma: +7/-0
Re: engine building tips. part 5. "BASIC/COMMON CYLINDER HEAD WORK"
« Reply #2 on: April 16, 2008, 06:33:38 PM »
No I don't...  I have an associate that  takes care of  flow bench work.

Rather than  that type of in-house work;  I chose to get into  Lathe / Millwork !

 Back in the  "70's"  I was a CNC operator fabricating  "Missiles", and I have my father
 
 taking care of the mill/lathe manufacturing end of the bus. He has well over "60" yrs.exp.!

 And I have my hands full with the engine end of the bus. , as I do all of the work from start

to finish.   This way we can make / fix most any parts..... shafts/threads/gears,etc.

We have many machine shops that cannot perform this type of work and rely  on our exp.

for tooling/manufacturing/prototype work and so on.
  • Boat #1: 1970 Horizon Cheby powered Jet
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GAWnCA

  • Karma: +1/-1
Re: engine building tips. part 5. "BASIC/COMMON CYLINDER HEAD WORK"
« Reply #3 on: April 16, 2008, 07:29:41 PM »
Back in the  "70's"  I was a CNC operator fabricating  "Missiles",

CNC back in the 70's huh?  Hmmmm.....   ???  :sly:  :-\
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~Greg
Forgive your enemies.  It messes up their heads.

enginedoctor

  • Karma: +7/-0
Re: engine building tips. part 5. "BASIC/COMMON CYLINDER HEAD WORK"
« Reply #4 on: April 17, 2008, 09:19:52 AM »
Yes!   Late  "70's" !!   It was called a   " G-32, made by Given".

 It was huge.  Tartan ind. in L.A. used them for manufacturing of missiles.

 look into it .   :) :)
  • Boat #1: 1970 Horizon Cheby powered Jet
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GAWnCA

  • Karma: +1/-1
Re: engine building tips. part 5. "BASIC/COMMON CYLINDER HEAD WORK"
« Reply #5 on: April 17, 2008, 09:24:36 AM »
Yes!   Late  "70's" !!   It was called a   " G-32, made by Given".

 It was huge.  Tartan ind. in L.A. used them for manufacturing of missiles.

 look into it .   :) :)

I was just wondering because the bast I could come up with was NC controlled and it was wing building.  I think IBM was the first actual C (computer) NC machine and it also was used for wing making.  I'm thinking it was used mainly for cutting out metal parts.  I'll bet that computer was bigger than a city block building 3 stories tall.   ;D  The refrigeration unit must have been massive as well.
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~Greg
Forgive your enemies.  It messes up their heads.

enginedoctor

  • Karma: +7/-0
Re: engine building tips. part 5. "BASIC/COMMON CYLINDER HEAD WORK"
« Reply #6 on: April 17, 2008, 09:36:20 AM »
Yes !  This machine from end to end was probably  100ft long.

 the chip conveyor alone was twice that.. I ran this thing to
 
 turn exit cones ,(exaust).... The buttons on the control panel

 were about the size of a silver dollar!  and of course, multi-turret. :)
  • Boat #1: 1970 Horizon Cheby powered Jet
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enginedoctor

  • Karma: +7/-0
Re: engine building tips. part 5. "BASIC/COMMON CYLINDER HEAD WORK"
« Reply #7 on: April 17, 2008, 03:54:34 PM »
oops....  G-32 was  " P/NC.---Programmable numerical control..!  Big diff. Huh? ;D
  • Boat #1: 1970 Horizon Cheby powered Jet
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