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Holden six cylinder head 101.

Started by _Bomber Watson_ , Dec 25 2013 10:13 AM

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#101 _Bomber Watson_

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Posted 31 January 2014 - 07:10 AM

Yeah the reason the first page ones vanished is because i put them in there own special folder so they dont vanish.

I cant edit the first posts to fix it and i got bored waiting for datto :-p

#102 stevemc32

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Posted 02 February 2014 - 09:18 PM

Solid rewrite of the info DJ, quick question, are the water neck mounts the same and interchangable between the red, blue and black heads?


#103 _Bomber Watson_

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Posted 02 February 2014 - 09:30 PM

THere interchangeable, there were a few running differences though, some had temp bungs others didnt i think, need to go through my collection to confirm. 

 

Cheers. 


#104 _mustard XU1_

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Posted 26 April 2014 - 08:54 AM

Great topic, very informative, I got to learn a few things of interest to myself.

thanks for taking the time to write this Bomber Watson

#105 _Bomber Watson_

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Posted 26 April 2014 - 01:20 PM

Yeah i learnt a bit about them doing this as well. 

 

Whilst i was taking picks and comparing for the thread noticed a lot of things i didnt know about previously. 

 

Cheers. 


#106 _BW Yella Terra_

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Posted 03 June 2014 - 04:19 PM

Will just add too this, YT did cast their own heads in steel back in the day, we also reworked and reco'd a lot of factory heads to the same specs. 

 

I will see if I can find any info relating too ID, but the standard line here is that no, there is no records. 


#107 _Bomber Watson_

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Posted 03 June 2014 - 06:22 PM

THanks for that. 

 

The heads pictured above as YT heads are Holden castings you have modified. 

 

Cheers. 


#108 _gorto_

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Posted 03 June 2014 - 06:58 PM

Not sure if you mentioned it or not, just wondering what the differences between a standard steel 12 port head and say, a YT alloy head? Are they the same chamber design?

Also, good work on the thread, heaps of info. I'm sure everyone appreciates your work.

Thanks, Ryan.


Edited by gorto, 03 June 2014 - 07:00 PM.

#109 _Bomber Watson_

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Posted 03 June 2014 - 07:24 PM

No i didnt mention it. I dont have a YT alloy sitting infront of me to compare. 

 

As i said from the outset the only thing im going to include in the official parts is what i can prove with the stuff i have right infront of me, no heresay. 

 

Donate me a YT alloy and i'll do a comparo :D

 

Cheers. 


#110 _Lazarus_

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Posted 03 June 2014 - 07:57 PM

Just to be sure this isn't some kind of a conspiracy going on between you and YT I think it would be best if I am supplied with one as well to provide a second opinion.


#111 _BW Yella Terra_

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Posted 04 June 2014 - 04:17 PM

No i didnt mention it. I dont have a YT alloy sitting infront of me to compare. 

 

As i said from the outset the only thing im going to include in the official parts is what i can prove with the stuff i have right infront of me, no heresay. 

 

Donate me a YT alloy and i'll do a comparo :D

 

Cheers. 

 

 

Just to be sure this isn't some kind of a conspiracy going on between you and YT I think it would be best if I am supplied with one as well to provide a second opinion.

Hahaha 

 

Nice try guys  :lol:


#112 RallyRed

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Posted 04 June 2014 - 05:13 PM

great work Bomber...never knew there were so many differences.

#113 _Bomber Watson_

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Posted 04 June 2014 - 07:27 PM

Really need to pull my finger out and talk Datto into giving me mod privleges for a hour or so so i can clean this thread up, as he's to lazy to do it.....

 

If you guys keep posting i might remember lol.

 

Cheers.  


#114 _egk4d_

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Posted 05 July 2014 - 09:53 PM

Hey Bomber is it worth mentioning the valve guide boss size change on the early hc red heads for the teflon valve guide seals on the lc xu1s, not sure what the 202s had


#115 _Bomber Watson_

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Posted 05 July 2014 - 09:55 PM

I had absolutely no idea about that, and nothing in my collectoin suggests the change, but its in the bucket list to look into. 

 

Cheers. 


#116 _egk4d_

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Posted 06 July 2014 - 07:08 PM

heers a pic to add to your list, not the best but you can see the valve guide seal on one boss and removed on the other, casting number is hard to read think its 2815843  date code g30

 

 

Attached File  1970 lc xu1 head.jpg   299.03K   8 downloads


#117 nstood

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Posted 17 July 2014 - 07:59 PM

Is there any difference in pushrod length between the engines? i.e black bottom with red head considerations?

#118 _Bomber Watson_

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Posted 17 July 2014 - 08:01 PM

Yes, but not quiet as you see it. 

 

Early reds with adjustable rockers use a different lengh pushrod to the late reds and everything after with bridged rockers. 

 

Run the pushrods to suit the head/rocker style. 

 

Cheers. 


#119 _stretchlc_

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Posted 17 July 2014 - 08:43 PM

186 run slightly longer pushrods than 202's.


#120 _Bomber Watson_

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Posted 17 July 2014 - 08:50 PM

Thought that was the case, but three tallies in i didnt want to comment incase i got it backwards haha. 

 

And, not nit picking, but that should be "186 style head with adjustable rockers runs a slightly longer pushrod than a 202 style head with bridged rockers" :P

 

Cheers. 


#121 _Bluejinx202_

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Posted 13 August 2014 - 05:22 PM

Does an XU1 head have any difference besides the numbers of any other head?

Edited by Bluejinx202, 13 August 2014 - 05:23 PM.

#122 _Bomber Watson_

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Posted 13 August 2014 - 05:40 PM

Again, i dont have one, so cant comment.

I think they had marginally bigger valves and a slight tweek,wasnt much though.

#123 _datpsi_

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Posted 24 August 2014 - 01:53 PM

You blokes are bloody knowledgeable! I didn't realise there was so many variants. Is there one or several ideal 9 port heads to look for full race application as in wall thicknesses, pushrod holes etc etc? Do realise this isn't a straight forward

#124 _Bomber Watson_

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Posted 24 August 2014 - 02:10 PM

As far as 9 port goes most people tend to use the early version with the extra drain holes. 

 

Thats what mine will be running when its back together. 

 

Apart from that TMK there isnt a huge difference, probably more variance in core shift during casting than actual intentional changes, but someone with more porting knowledge will probably pipe up and tell me im wrong. 

 

Cheers. 


#125 N/A-PWR

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Posted 24 August 2014 - 04:09 PM

Just reminding you DJ:-

 

http://www.gmh-toran...e-5#entry835601

 

 

I would like to add a way of sorting out what you have already,

 

plus extra information, as you have done already:-

 

 

is to use your Photobucket Picture URL id numbers in a way,

 

that when posted as such in a Post, so that when you need to change a picture to a better one in that post later,

 

you give the new picture the same URL in the Photobucket account as the one in the post already.

 

 

That way a picture will change in that particular post automatically.

 

 

So the reason for saying this, is so you could have a Picture of a Part with a corresponding casting number,

 

and have a few of these down the page, and when some better Photo's come along for a certain casting number,

 

you will be able to change that particular Photo to suit.

 

 

Never mine me blabbing, and has worked for me in the past, the 101 Head Thread is looking good in any case. 


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