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| CNC'd 1275 Combustion Chambers https://www.ausmini.com/forums/viewtopic.php?f=2&t=82730 |
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| Author: | GR [ Sat Sep 14, 2013 10:10 am ] |
| Post subject: | CNC'd 1275 Combustion Chambers |
Hi, we can now CNC your combustion chambers for road heads, race heads. When servicing the head the chambers can be brought back to equal capacities. The chambers are designed on the flow bench to suit 1.4ins up to 1.460ins. We are now working on small bore heads as well. These chambers are done on brand new castings and we have some new castings for 1275 and 202 small bore heads. Graham Russell     
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| Author: | mattsmadmini [ Sat Sep 14, 2013 11:04 am ] |
| Post subject: | Re: CNC'd 1275 Combustion Chambers |
 wow... |
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| Author: | sgc [ Sat Sep 14, 2013 11:45 am ] |
| Post subject: | Re: CNC'd 1275 Combustion Chambers |
+1 That is porn right there... |
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| Author: | TK [ Sat Sep 14, 2013 12:23 pm ] |
| Post subject: | Re: CNC'd 1275 Combustion Chambers |
Graham, Did you get the CNC progran off someone up here in Brisvegas? I remember seeing one of this blokes heads more than a year ago, pure perfection. 
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| Author: | GR [ Sat Sep 14, 2013 4:27 pm ] |
| Post subject: | Re: CNC'd 1275 Combustion Chambers |
HI Tk No it's done down here in sunny NSW Graham Russell |
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| Author: | MiniBill [ Sat Sep 14, 2013 6:38 pm ] |
| Post subject: | Re: CNC'd 1275 Combustion Chambers |
Beautiful ..... i love the shiny |
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| Author: | Kennomini [ Sat Sep 14, 2013 9:27 pm ] |
| Post subject: | Re: CNC'd 1275 Combustion Chambers |
GR wrote: These chambers are done on brand new castings and we have some new castings for 1275 and 202 small bore heads. Are you saying you only do it on brand new (NOS) heads or can you do it on any head pulled out of any old pile? |
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| Author: | Mokesta [ Sat Sep 14, 2013 9:34 pm ] |
| Post subject: | Re: CNC'd 1275 Combustion Chambers |
CNC ports as well? A mate of mine has just got a full program set up for Evo motor heads, $7k for the CNC program for ports and chambers. Need lots of heads to spread that cost over or one racer with a no-limit budget. M |
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| Author: | GR [ Sun Sep 15, 2013 7:30 am ] |
| Post subject: | Re: CNC'd 1275 Combustion Chambers |
Hi Kennomini No it can be done to any old head. Graham Russell |
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| Author: | GR [ Sun Sep 15, 2013 7:43 am ] |
| Post subject: | Re: CNC'd 1275 Combustion Chambers |
Hi Mokesta No The chambers are only done by CNC the ports and all other grinding done by hand,to do a full castiron head would be very expencive because of the amount of times you have to go over it to get it very accurate as it is harder to machine castiron than alloy the very expencive alloy heads are machined two to three times for best results,and CNC heads are only as good as the person programing the machine Graham Russell |
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| Author: | sitnlo62 [ Sun Sep 15, 2013 9:01 pm ] |
| Post subject: | Re: CNC'd 1275 Combustion Chambers |
Did some of that myself 18 months ago. Here is a pic of my Proto type Chamber cut in a piece of Aluminium. 
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| Author: | Flash [ Mon Sep 16, 2013 9:00 am ] |
| Post subject: | Re: CNC'd 1275 Combustion Chambers |
Shiny things gets them in every time! At least you'll know each chamber will be exactly the same as the others. |
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| Author: | Kennomini [ Mon Sep 16, 2013 5:38 pm ] |
| Post subject: | Re: CNC'd 1275 Combustion Chambers |
Bit of a silly question but is it possible with all the 3D scanners and stuff these days to just get a few old heads that have had the hours spent on them making big ports and chambers and scan their chambers and give that info to the CNC machine? |
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| Author: | KLAS [ Mon Sep 16, 2013 6:51 pm ] |
| Post subject: | Re: CNC'd 1275 Combustion Chambers |
Kennomini wrote: Bit of a silly question but is it possible with all the 3D scanners and stuff these days to just get a few old heads that have had the hours spent on them making big ports and chambers and scan their chambers and give that info to the CNC machine? today everything is possible. they even claim a fully automatical duplicating of chambers and ports http://www.centroidcnc.com/special_cnc.htm |
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| Author: | kirby [ Mon Sep 16, 2013 7:28 pm ] |
| Post subject: | Re: CNC'd 1275 Combustion Chambers |
GR wrote: The chambers are designed on the flow bench to suit 1.4ins up to 1.460ins. If you went to the trouble of CAMing a head why did you take a step back and use a flow bench?. Most CAD programs have some sort of Air flow simulation that will be infinitely more accurate than you could ever get with a flow bench. You could settle that shrouded valves debate once and for all. |
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