Holden six cylinder head 101.
#1 _Bomber Watson_
Posted 25 December 2013 - 10:13 AM
#2 _Bomber Watson_
Posted 25 December 2013 - 10:38 AM
#3
Posted 25 December 2013 - 10:51 AM
So thank's to you DJ,
I have an Early Red ( slots ) and had adjustable 3/8 studs put in:-
IMG_4426.JPG 40.97K 20 downloads
also this is a Stage 5 Port:-
IMG_4427.JPG 32.83K 26 downloads
#4 _oldjohnno_
Posted 25 December 2013 - 02:03 PM
Great stuff Bomber, there's a need for this sort of info.
#5 _Lazarus_
Posted 25 December 2013 - 03:07 PM
When you say the 12 port heads had hardened seats 'fitted to them' were they inserts or just flame hardened ?
I have one I bought with inserts but I was under the impression these were fitted as part of a gas conversion.
#6 _Bomber Watson_
Posted 25 December 2013 - 04:01 PM
Every one i have looked at has inserts on the exhaust valve, i assume they were all like that.
As i said, this isnt a bee all and end all, just differences i have noticed looking at my personal stash, there wernt any books or googles consulted in the making of this little guide lol.
Cheers.
Edited by Bomber Watson, 25 December 2013 - 04:10 PM.
#7 _Muzzy_
Posted 25 December 2013 - 04:27 PM
#8 _Bomber Watson_
Posted 25 December 2013 - 04:29 PM
Yep that seems pretty normal for high comp heads that have been reasonably untouched.
Cheers.
#9 _Muzzy_
Posted 25 December 2013 - 04:30 PM
BTW
I CC ed my blue and red head today both came in at 46 CC
Edited by Muzzy, 25 December 2013 - 04:32 PM.
#10 _Bomber Watson_
Posted 25 December 2013 - 04:42 PM
THe more i look at this the more im not overly happy with it, i admit i fairly rushed it, had a bit of time to kill this morning between walking the dog and heading off to do the whole be nice to the family thing, and i cranked the above out in about 2 1/2 hours including taking the picks which sounds like plenty of time but it was pretty rushed.
I'll have a bit of a play around in wordpad and get a mod to edit it when im more content, in the meantime, anyone have any ideas on how to improve?
I think we need more and better pictures showing the difference between 9 and 12 port heads, after all this is intended as a brain soak for someone who has never seen a holden six before and i pretty well glanced over one of the major factors, anything else?
Cheers.
#11 _Muzzy_
Posted 25 December 2013 - 05:53 PM
#12 _Bomber Watson_
Posted 25 December 2013 - 05:56 PM
Hmmm i considered stock to be pretty irrelevant, but i will do.
Cheers.
#13 _Muzzy_
Posted 25 December 2013 - 06:11 PM
Another brain wave
Measure the head thickness from face to a. Head bolt machine face
The reason for this, one could work out if the head has been decked
I'm happy to provide any info you want on the red 173 head, as I know it is std, we knew the owner and have know the car for 30 years and it's a 1 owner vehicle
#14 _Bomber Watson_
Posted 25 December 2013 - 06:14 PM
Yeah righto i'll see if i have enough untouched stock ones to do a comparison. Know i have one there atleast, just gotta remember which one it is....
#15 _Gunmetal LH_
Posted 25 December 2013 - 06:32 PM
Cheers Bomber.
Was wondering are the valves sizes the same all the way through?
#16 _Bomber Watson_
Posted 25 December 2013 - 06:36 PM
Na blue/black are bigger.
#17 _Gunmetal LH_
Posted 25 December 2013 - 06:40 PM
Scroll,
Scroll,
Scroll,
Scroll,
Scroll,
Scroll,
Coolies. How much bigger?
#18 _Bomber Watson_
Posted 25 December 2013 - 06:50 PM
About 6 periwinkles on the inlet and 4 dooglebugs on the exhaust bigger.
#19 _Gunmetal LH_
Posted 25 December 2013 - 06:59 PM
#20 _Bomber Watson_
Posted 25 December 2013 - 07:02 PM
Translation is i cant be #@$^%& measuring them atm....
#21 _oldjohnno_
Posted 25 December 2013 - 07:59 PM
THe more i look at this the more im not overly happy with it, i admit i fairly rushed it, had a bit of time to kill this morning between walking the dog and heading off to do the whole be nice to the family thing, and i cranked the above out in about 2 1/2 hours including taking the picks which sounds like plenty of time but it was pretty rushed.
I'll have a bit of a play around in wordpad and get a mod to edit it when im more content, in the meantime, anyone have any ideas on how to improve?
I think we need more and better pictures showing the difference between 9 and 12 port heads, after all this is intended as a brain soak for someone who has never seen a holden six before and i pretty well glanced over one of the major factors, anything else?
Cheers.
I wouldn't be too concerned, I think it's better to get it out there and then polish it up over time. In my experience if you wait til it's perfect before you post it'll never happen.
One of the things that comes up here all the time is the differences in the coolant holes, especially when fitting a blue head to a red block or vice versa. Another regular question is extractor interchangeability.
#22 _Bomber Watson_
Posted 25 December 2013 - 08:06 PM
frOck i didnt even think about the coolant holes. Good call.
And the difference in manifold stud positions.
Good calls.
Cheers.
#23
Posted 25 December 2013 - 08:58 PM
Good write up bomber, perhaps someone has some pics to add of the efi head which you didnt have? and maybe have it pinned in the engine section, then in time as stuff is added, have the suggestions removed so the thread isnt cluttered, and send stinga a life supply of your home brew as he is a poor dad now.
cheers
#24 _Bomber Watson_
Posted 25 December 2013 - 09:07 PM
Lol.
Got beer sorted, im set up real good more or less....
Looking at making a still now.....Dont tell anyone.
Cheers.
#25 _hutch_
Posted 26 December 2013 - 09:17 AM
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