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What head is this?
https://www.ausmini.com/forums/viewtopic.php?f=2&t=76112		 Page 1 of 1
Author:  CARTER_GT [ Mon Mar 26, 2012 12:13 pm ]
Post subject:  What head is this?
Hi all stupid me cant find any numbers to work out what this head is.

It reads:
12A 1456

heres a pic

Image

Cheers, Steve
Author:  smac [ Mon Mar 26, 2012 12:22 pm ]
Post subject: 
Stock 850/998 head isn't it?

Edit: yep...
http://www.minimania.com/web/SCatagory/ ... ticleV.cfm
Author:  CARTER_GT [ Mon Mar 26, 2012 12:42 pm ]
Post subject: 
nothing special then :? has had all the ports valves cleaned up and enlarged. Was sitting on a +40 thou 1098. It should be alright shoudnt it? performance wise

Thanks smac :D
Author:  Anto [ Mon Mar 26, 2012 12:53 pm ]
Post subject: 
CARTER_GT wrote:
nothing special then :? has had all the ports valves cleaned up and enlarged. Was sitting on a +40 thou 1098. It should be alright shoudnt it? performance wise


Depends... With slightly bigger inlet valves and some porting it may well be just as good as a 12G202 head, as per stock 1098 :wink:
Author:  CARTER_GT [ Mon Mar 26, 2012 12:55 pm ]
Post subject: 
Anto wrote:
CARTER_GT wrote:
nothing special then :? has had all the ports valves cleaned up and enlarged. Was sitting on a +40 thou 1098. It should be alright shoudnt it? performance wise


Depends... With slightly bigger inlet valves and some porting it may well be just as good as a 12G202 head, as per stock 1098 :wink:


Ohh.. :( Wish my 295 was still good..
Author:  drmini in aust [ Mon Mar 26, 2012 1:11 pm ]
Post subject: 
You can port them out & fit big valves just like you can with a 202, but there's more metal to remove.
Way back when they were all we had, I used to start by sticking a 1-1/16" drill down the inlet ports. :P
Author:  CARTER_GT [ Mon Mar 26, 2012 1:48 pm ]
Post subject: 
drmini in aust wrote:
You can port them out & fit big valves just like you can with a 202, but there's more metal to remove.
Way back when they were all we had, I used to start by sticking a 1-1/16" drill down the inlet ports. :P


Im keen to do this :wink: How far down do you drill? Is it a complex task or would i be able to attempt it with the right tools?
Author:  drmini in aust [ Mon Mar 26, 2012 2:42 pm ]
Post subject: 
Stop before you get to the Y bit (aka a bifurcation).
Then blend the ports back in with a die grinder. Works good with 202 or 295 inlet valves.

Make sure you drill it straight in a big bench drill or a milling machine- there is only about 1-1/8" of space between the edges of the 2 pushrod holes.

If you eff it up don't worry, the world is full or 12A1456 heads. :mrgreen:
Author:  smac [ Tue Mar 27, 2012 5:41 am ]
Post subject: 
What does an unmolested 202 head sell for in aus these days?
Author:  drmini in aust [ Tue Mar 27, 2012 6:34 am ]
Post subject: 
~$50 for a 202 needing reco, $100 up for a good one complete, with good valves still.
295s bring a lot more, but they tend to be cracked more often than 202s from my observations.
Author:  smac [ Tue Mar 27, 2012 7:36 am ]
Post subject: 
Ya I have a rusty old 295 sitting here but I'm not sure it's even worth getting it cleaned up and tested.....pretty pitted.
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