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906 Heads True Combustion chamber cc?? #527592 11/16/09 10:37 AM 11/16/09 10:37 AM
Joined: Apr 2007 Posts: 2,826 NY usa 5 540challenger OP master
540challenger OP master 5 Joined: Apr 2007 Posts: 2,826 NY usa	Has anyone CCed the combustaion chamber on Big block 906 heads. I have a buddy geting a motor built and the guy puting the motor together for him said that they CCed at 78 CC and they were never milled This doesn't seem right to me. Thanks for the help/

Re: 906 Heads True Combustion chamber cc?? [Re: 540challenger] #527593 11/16/09 10:44 AM 11/16/09 10:44 AM
Joined: Jun 2008 Posts: 3,916 usa L lewtot184 master
lewtot184 master L Joined: Jun 2008 Posts: 3,916 usa	an unmilled head will vary between 88cc-90cc, usually closer to 88cc.

Re: 906 Heads True Combustion chamber cc?? [Re: lewtot184] #527594 11/16/09 10:49 AM 11/16/09 10:49 AM
Joined: Mar 2008 Posts: 407 NE Indiana momopar mopar
momopar mopar Joined: Mar 2008 Posts: 407 NE Indiana	Isn't the "blueprint" for a 906 79.5cc?

Re: 906 Heads True Combustion chamber cc?? [Re: momopar] #527595 11/16/09 10:52 AM 11/16/09 10:52 AM
Joined: Apr 2007 Posts: 2,826 NY usa 5 540challenger OP master
540challenger OP master 5 Joined: Apr 2007 Posts: 2,826 NY usa	Quote: Isn't the "blueprint" for a 906 79.5cc? I think the guy putting this together went by blue-print spec instead of actually CCing the heads. The blue pritned numbers are all fudged numbers.

Re: 906 Heads True Combustion chamber cc?? [Re: lewtot184] #527596 11/16/09 10:53 AM 11/16/09 10:53 AM
Joined: Apr 2007 Posts: 2,826 NY usa 5 540challenger OP master
540challenger OP master 5 Joined: Apr 2007 Posts: 2,826 NY usa	Quote: an unmilled head will vary between 88cc-90cc, usually closer to 88cc. thank you

Re: 906 Heads True Combustion chamber cc?? [Re: momopar] #527597 11/16/09 11:51 AM 11/16/09 11:51 AM
Joined: Jan 2003 Posts: 74,988 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 74,988 U.S.S.A.	Quote: Isn't the "blueprint" for a 906 79.5cc? NO ,That is the NHRA spec which doesn't remotely resemble actual , which is usually 90 cc , I have a bunch and never seen any under 90cc that haven't been decked. If the shop cc'd them and they are 78 they have been decked , A LOT .

Re: 906 Heads True Combustion chamber cc?? [Re: 540challenger] #527598 11/16/09 11:51 AM 11/16/09 11:51 AM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	The numbers are not fudged they were designed to be 78.5 (by the blue prints) but any I ever checked were 86 to 88. I milled a set to 63 cc (about .105 to .110 off) turned them into closed chamber!! They worked good for a few years till one cracked back in the intake port where the porting had made it thin!

Re: 906 Heads True Combustion chamber cc?? [Re: 540challenger] #527599 11/16/09 11:52 AM 11/16/09 11:52 AM
Joined: Aug 2007 Posts: 6,095 Valencia, España NachoRT74 master
NachoRT74 master Joined: Aug 2007 Posts: 6,095 Valencia, España	I got 92s on my 452s. Specs on websites states 84... GO FIGURE With a Charger born in Chrysler assembly plant in Valencia, Venezuela

Re: 906 Heads True Combustion chamber cc?? [Re: NachoRT74] #527600 11/16/09 11:55 AM 11/16/09 11:55 AM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	Yea the 452's were mostly 90/92 as cast!

Re: 906 Heads True Combustion chamber cc?? [Re: Dodgem] #527601 11/16/09 12:41 PM 11/16/09 12:41 PM
Joined: Feb 2003 Posts: 12,675 Columbia, CT M moper I Live Here
moper I Live Here M Joined: Feb 2003 Posts: 12,675 Columbia, CT	90-92 as cast. Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.

Re: 906 Heads True Combustion chamber cc?? [Re: moper] #527602 11/16/09 01:50 PM 11/16/09 01:50 PM
Joined: Jul 2007 Posts: 70 Virginia 6 67 GTX member
67 GTX member 6 Joined: Jul 2007 Posts: 70 Virginia	My 906 heads milled 0.010 measured to be 84 cc.

Re: 906 Heads True Combustion chamber cc?? [Re: 67 GTX] #527603 11/16/09 02:47 PM 11/16/09 02:47 PM
Joined: Sep 2004 Posts: 6,906 IL, Aurora A ademon master
ademon master A Joined: Sep 2004 Posts: 6,906 IL, Aurora	i have a couple sets of 915 close chamber heads the one i used on my RR cc at 80cc with the small exh, most opens were 90 + then add a couple valve jobs where the valve sinks add more cc's. If you have replaced the valves with ones that are not concaved like the factory ones then you could cut down the cc's buy a bit.

Re: 906 Heads True Combustion chamber cc?? [Re: ademon] #527604 11/16/09 03:23 PM 11/16/09 03:23 PM
Joined: Nov 2004 Posts: 7,647 Houston Texas PAINT IT BLACK Got a CHIP on my shoulder
PAINT IT BLACK Got a CHIP on my shoulder Joined: Nov 2004 Posts: 7,647 Houston Texas	I had mine cc'd and it came out to 93+cc

Re: 906 Heads True Combustion chamber cc?? [Re: PAINT IT BLACK] #527605 11/16/09 04:14 PM 11/16/09 04:14 PM
Joined: Feb 2005 Posts: 5,221 Branson, Mo. J joedust451 super gas
joedust451 super gas J Joined: Feb 2005 Posts: 5,221 Branson, Mo.	I CC'd a set & they were 91. 75 Duster, 451 10.87 @ 123.58 NA 97 Z28 6sp., 12.01 @ 115 on a 100 shot 71 Swinger. 360 magnum. 12.58 @ 105 78 cutlass, 469 BBC. 12.70 @ 108 on street tires. http://www.youtube.com/watch?v=Z2kqNmMfheU

Re: 906 Heads True Combustion chamber cc?? [Re: Dodgem] #2712254 11/02/19 10:06 PM 11/02/19 10:06 PM
Joined: Jan 2003 Posts: 9,989 Frostbitefalls MN (Rocky&Bullw... gregsdart master
gregsdart master Joined: Jan 2003 Posts: 9,989 Frostbitefalls MN (Rocky&Bullw...	Originally Posted by Dodgem The numbers are not fudged they were designed to be 78.5 (by the blue prints) but any I ever checked were 86 to 88. I milled a set to 63 cc (about .105 to .110 off) turned them into closed chamber!! They worked good for a few years till one cracked back in the intake port where the porting had made it thin! <img src="/ubbthreads/images/graemlins/shruggy.gif" alt="" /> I had a set cut like that. Under a black light they looked like a lit christmas tree after a few seasons! 8..603 156 mph best, 2905 lbs 549, indy 572-13, alky

Re: 906 Heads True Combustion chamber cc?? [Re: gregsdart] #2712255 11/02/19 10:08 PM 11/02/19 10:08 PM
Joined: May 2019 Posts: 6,236 nowhere S Sniper master
Sniper master S Joined: May 2019 Posts: 6,236 nowhere	do you realize this ia a ten year old thread?

Re: 906 Heads True Combustion chamber cc?? [Re: 540challenger] #2712271 11/02/19 10:51 PM 11/02/19 10:51 PM
Joined: Aug 2003 Posts: 43,141 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,141 Bend,OR USA	Every stock 906 I've check had 90+ CC, every one of many, the chambers will vary from 2.0 to 4.5 CC on the same head also Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

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