Stage IV update!!!!!!
#2412406
12/02/17 09:16 PM
12/02/17 09:16 PM
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Joined: Oct 2007
Posts: 734 New York
R/T1968R/T
OP
super stock
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OP
super stock
Joined: Oct 2007
Posts: 734
New York
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Have a set of Stage IV heads that are milled .080. If i use the 452 chamber size it looks like they could be 75-76 ccs? .080 divided by .0062 for every cc = 12.9 ccs
Last edited by R/T1968R/T; 12/05/17 11:10 PM.
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Re: 452 Cylinder head chamber similar to stage IV ?
[Re: R/T1968R/T]
#2412415
12/02/17 09:31 PM
12/02/17 09:31 PM
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Joined: Aug 2003
Posts: 43,095 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,095
Bend,OR USA
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Stock 452 heads check above 90 CC, at least all of the ones I have checked did I think the stock uncut Stage Four heads where large like that also, maybe 84.0 CC to start with, maybe not
Last edited by Cab_Burge; 12/02/17 09:31 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 452 Cylinder head chamber similar to stage IV ?
[Re: R/T1968R/T]
#2412698
12/03/17 04:28 PM
12/03/17 04:28 PM
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Joined: Jan 2003
Posts: 14,491 So. Burlington, Vt.
fast68plymouth
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I Live Here
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So. Burlington, Vt.
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The brand and size of the valves, how the valve job was done, how many valve jobs have been done, how big they actually were to start with, and how much they've been milled are all factors in what size the chambers are.
If you really want to know...... You have to measure them.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 452 Cylinder head chamber similar to stage IV ?
[Re: LaRoy Engines]
#2412783
12/03/17 07:58 PM
12/03/17 07:58 PM
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Joined: Feb 2005
Posts: 4,310 Prospect, PA
BSB67
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master
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Posts: 4,310
Prospect, PA
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.......why don't we just measure these things to know for sure, instead of guessing? Hmmm.
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Re: 452 Cylinder head chamber similar to stage IV ?
[Re: R/T1968R/T]
#2412803
12/03/17 08:43 PM
12/03/17 08:43 PM
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Joined: Oct 2007
Posts: 734 New York
R/T1968R/T
OP
super stock
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OP
super stock
Joined: Oct 2007
Posts: 734
New York
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Youre right I shouldnt guess. I have the plexiglass already just ordered a graduated cylinder.
Last edited by R/T1968R/T; 12/03/17 08:57 PM.
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Re: 452 Cylinder head chamber similar to stage IV ?
[Re: R/T1968R/T]
#2413273
12/04/17 09:58 PM
12/04/17 09:58 PM
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Joined: Mar 2005
Posts: 1,406 New Jersey, USA
yella71
pro stock
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pro stock
Joined: Mar 2005
Posts: 1,406
New Jersey, USA
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the only way to have the exact number is to cc them....that being said I had a set of those heads new right outta the box years ago and did not measure them but having seen many many bb mopar heads I will say they started out the same as any 452 head...BIG theres a reason they were cut .080 thou...
71 challenger convertable, 64 sport fury 383 ci with factory air
99 sebring convertable
89 CTD pup
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Re: Stage IV update!!!!!!
[Re: R/T1968R/T]
#2414188
12/06/17 02:07 PM
12/06/17 02:07 PM
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Joined: Jan 2003
Posts: 14,491 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
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So. Burlington, Vt.
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The chamber diameter is roughly 4.250........ At .080 that works out to about 18.6cc worth of milling.
Installing larger valves, along with using valves with flatter heads reduces chamber volume.
67 + 18.6 = 85.6cc.
I can see that as a starting point with oversized aftermarket valves.
The outer row of head bolt bosses are a nominal 1.00" thick, stock. If you measure a few it should give you an idea how close to that .080" has been cut off the decks.
This is why you measure instead of assume. They are what they are.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Stage IV update!!!!!!
[Re: R/T1968R/T]
#2415175
12/08/17 12:41 PM
12/08/17 12:41 PM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
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master
Joined: Jun 2008
Posts: 3,916
usa
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I think with out any quench Im screwed. I can always put them on a smog motor or a motor with L2266 which are .090 in the hole. there are quench dome pistons.
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Re: Stage IV update!!!!!!
[Re: R/T1968R/T]
#2415215
12/08/17 01:51 PM
12/08/17 01:51 PM
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Joined: Jan 2003
Posts: 74,937 U.S.S.A.
JohnRR
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I Win
Joined: Jan 2003
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U.S.S.A.
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I think with out any quench Im screwed. I can always put them on a smog motor or a motor with L2266 which are .090 in the hole. How deep are the open part of the chambers now? You can get a piston made that will give you quench and a streetable compression, I had Diamond make me some a few years ago. Sorry for the crappy picture, it's a D shaped dome with a D shaped dish, 9.5 compression 440 , though your heads being as small as there are might be a challenge on the dish size ?
running up my post count some more .
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