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AX/831C Blocks: Made for South Africa Only - (Read 542 Times)
 
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DaveBabs
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Post Icon Posted: Jun 5th, 2013 at 01:39 am

Guys,

I'm hunting down info on the South African built AX/831C Blocks. Have any of you guys come acros them or have any info on them. Would be most appreciated. Reading article in Jan Classic Ford has got the old system buzzing and would love to build up one of these but need the proper info before I go down that road. So that all the P's line up (proper Planning Prevents Piss Poor Performance)

DaveB

« Last Edited by DaveBabs Jun 5th, 2013 at 01:40 am »
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Dalek
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Post Icon Posted: Jun 5th, 2013 at 02:26 am

I used to own one a while back, was an 831C block.

What info do you need ?

Craig
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DaveBabs
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Post Icon Posted: Jun 5th, 2013 at 05:04 am

Hi Craig,

What info do you have on these blocks and how much of the 711 block is stuff is useable on the AX Block. Would be interested in any info you have as I may have the chance of one. Just want to know what is possible with these engines. Sounds like you've been down this road already.

Cheers

DaveB
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Dalek
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Post Icon Posted: Jun 5th, 2013 at 05:43 am

It's just an beefier xflow block

Have a look on turbosport site as there is a lot of info there

ex.

http://www.turbosport.co.uk/showthread.php?t=106383&highlight=831c

Mine was an old Hotrod (short circuit) engine.

Craig
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Anglia68
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Post Icon Posted: Jun 5th, 2013 at 04:49 pm

I had one I bought from Burtons back in the 80's when no one wanted them and it cost me £180 and came in a Ford Motorsport box.

I used it for both a 1700 crossflow and then a 1720.

I sold it via Ebay a few years ago and with the proceeds bought a brand new steel crank and conrods.

They are the same as other crossflow blocks as their extra strength comes from the higher grade of iron they are cast from which allows them to be bored out larger than a normal block and also makes them heavier.

Hths.


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1700 BDA re-build
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BeigeAl
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Post Icon Posted: Jun 7th, 2013 at 07:51 am

They're almost identical in outside appearance bar a few things like a oil temp/level boss, lack of a rear dipstick hole (although you can drill one) and slightly different webs at the rear where the bellhousing bolt holes are.

As mentioned they are made of stronger material NOT thicker bores as is commonly thought.

Heads, cranks, cams, crank seal carriers etc from the 711 all fit.

I had one bored to 85.75mm and it was fine.
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fridgeman
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Post Icon Posted: Jun 11th, 2013 at 01:59 pm

allways thought there was more metal in them and thats why there used for big cc,s over 711m. Smiley
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DaveBabs
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Post Icon Posted: Sep 2nd, 2013 at 07:51 pm




Jun 5th, 2013 at 05:43 am, Dalek wrote:
It's just an beefier xflow block

Have a look on turbosport site as there is a lot of info there

ex.

http://www.turbosport.co.uk/showthread.php?t=106383&highlight=831c

Mine was an old Hotrod (short circuit) engine.

Craig


« Last Edited by DaveBabs Sep 2nd, 2013 at 07:53 pm »
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63woody
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Post Icon Posted: Sep 3rd, 2013 at 12:57 pm

Hi im running an ax block in my mk1 Cortina.It makes for a strong little engine.Mine was built by Joe at throbnozzle.Brief spec on mine is ported n polished head with Lotus twink sprint valves,CAT 238 cam.The pistons in mine are genuine Cosworth BDT modified to suit with Carillo steel rods and offset ground rubber crank.Its running twin 45 webers and electronic ignition also.Exhaust is all 105Speed.Havnt had it rolling roaded but i would think at least 130bhp more with a good tune up.Oh and its 1800cc Pre Xflow!
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