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#1
06-19-2014, 03:21 PM
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The new CNC chamber E-heads
For those that didn't know, Edelbrock came out with a new CNC chamber round port for us to play with. It has a more modern heart shaped chamber that looks pretty nice. The rest of the head is the same, but now you can get a chamber that wasn't designed in the 60's. 61515 and 61525 are the numbers for the complete heads, 72 and 87cc.
These are going on my 474 and back in the car in a couple of weeks, so I'll be able to post updates about the timing needed and performance. I'll run these as "Out of the box" for the rest of the year, then send them off next spring for porting. Anyone know the best way to get 4 years of dust off a car? 
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#2
06-19-2014, 03:34 PM
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Don't be concerned with the dust on the car, concern yourself with the rust on the driver.
 Good luck with the car and getting back out. |
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#3
06-19-2014, 03:55 PM
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Quote:
__________________
Less said,,,,,,,, Less mended. |
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#4
06-19-2014, 04:04 PM
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LOL!
I lifted the car cover and it's not too bad.
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#5
06-19-2014, 04:23 PM
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Are those the 72 cc heads you have there
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#6
06-19-2014, 04:27 PM
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87cc
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#7
06-19-2014, 04:51 PM
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David best way to get the dust off 100+ mph passes
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune [email protected] 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs 1964 Corvette Coupe 327 4 speed |
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#8
06-19-2014, 05:24 PM
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Quote:
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#9
06-19-2014, 05:38 PM
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They have been available for a couple of year now but at something like a $100 more then the std rpm heads. They call them rpm cnc heads. I ask do you no if this is the new chamber on all them???
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#10
06-19-2014, 05:41 PM
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Does E-Brock give you any flow numbers ? If I scratched my head enough maybe I could remember them. Do like that chamber shape.
Jim
__________________
65 Catalina sedan. Allen Thomas Performance 495. KRE Heads at 310cfm ported by SD Performance, ProSystems Dominator carb on ported Victor intake, P-Dude custom grind hydraulic roller, MSD ignition, 3.50 Moser/Ford rear. F-Glass front bumper by son Rob, rear by the old man and joint effort for trunk lid. 3950# w/driver. Best of 9.5761/139 on 175 shot, 6.01 /114 in 1/8. |
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#11
06-19-2014, 06:53 PM
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The old, normal heads flow 275ish on the 87cc and 28x with the 72cc chambers.
Its been said that the new chambers will help the flow, but Edelbrock doesn't list a difference in numbers. Tmoney, these are only on the CNC heads, the old chamber is still available, if someone would want it. |
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#12
06-19-2014, 08:27 PM
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David-
Are they new chambers on the original e-head? Any differences in the port? Are you going to flow them? |
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#13
06-19-2014, 08:52 PM
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They are the same head with a CNC'd chamber added.
You can't tell from the outside if the head has the new chamber or not. I'm not going to flow these at this point, but will before they are ported. Everyone that has seen them things they are much improved. |
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#14
06-19-2014, 09:32 PM
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looks familiar.....
__________________
71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
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#15
06-19-2014, 09:43 PM
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It was better before.
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#16
06-19-2014, 09:55 PM
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Here's how I done that chamber.
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#17
06-19-2014, 10:23 PM
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Quote:
Don't look like a Pontiac head to me. |
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#18
06-19-2014, 11:54 PM
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Congrats David! Good luck and have fun!!!
__________________
East Coast Mafia TTFMF Making CVWHAT's great again. I guess it took a deplorable ECM member to do it! Quote:
 Fastest Blow-thru Pontiac powered car in the Country [email protected] (3465lbs) Fastest Pontiac CV-1 car on the planet with only 6 passes on the combo: [email protected]/ [email protected] (3365lbs) |
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#19
06-20-2014, 12:29 AM
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Mike, the KRE and both E heads (D and Round) have heart shaped chambers, but when compared side by side they are all different. Which one is better, that's a good question. I think the majority of these heads will be modified so it will just depend on the guy holding the grinder.
More than anything I think it just gives the porter a head start and a better base to start with. |
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#20
06-20-2014, 10:31 AM
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And it probably gives the guys not wanting to weld then machine a better chamber than a generic one. Got to remember most of the E heads are on street/strip type machines not full tilt race motors.
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune [email protected] 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs 1964 Corvette Coupe 327 4 speed |
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