Re: Edelbrock rpm head questions.....................
[Re: Thumperdart]
#1092077
10/11/11 09:08 PM
10/11/11 09:08 PM
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Joined: Jan 2003
Posts: 5,487 SoCal
Brian Hafliger
master
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master
Joined: Jan 2003
Posts: 5,487
SoCal
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Lower the floor at the pushrod pinch and work it into the short turn...but be carefull or you'll be in H2O! I'll bet there is at least 20HP in your heads if not more from better porting. Another 10HP with a 2.18 valve.
Brian Hafliger
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Re: Edelbrock rpm head questions.....................
[Re: Thumperdart]
#1092079
10/11/11 09:55 PM
10/11/11 09:55 PM
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Joined: Dec 2007
Posts: 10,542 BROOK PARK, OH
WILD BILL
Senior Member of the Junior Dragster Club
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Senior Member of the Junior Dragster Club
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
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Sorry Dom, I can't find any of my build sheets.
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Re: Edelbrock rpm head questions.....................
[Re: bumps440]
#1092083
10/11/11 11:58 PM
10/11/11 11:58 PM
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Joined: Feb 2005
Posts: 20,272 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,272
PA.
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Going with a bigger (Ferrea)intake valve and sizing the throat at 88-90 percent would defiantly increase performance. 8 intake valves would cost about 150.00 on ebay or from one of our members. Do not get greedy on the throat sizing as it will kill the flow.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.38@138.67
Livin and lovin life one day at a time
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Re: Edelbrock rpm head questions.....................
[Re: Thumperdart]
#1092085
10/12/11 04:57 AM
10/12/11 04:57 AM
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Joined: Jul 2004
Posts: 4,384 Worst Weather USA
493_DART
master
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master
Joined: Jul 2004
Posts: 4,384
Worst Weather USA
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dont know if this helps Dom--- my buddy has been 9.2x or so with RPMs . this was a couple years ago but off the top of me head.. 512" 620 lift roller ported Rpm heads 72 Cuda --weight = 2800 or so ?? on race gas / dominator I say try to shave some weight off the car and good luck
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Re: Edelbrock rpm head questions.....................
[Re: Thumperdart]
#1092095
10/13/11 01:46 PM
10/13/11 01:46 PM
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Joined: Feb 2007
Posts: 347 north west, IN
larry890
enthusiast
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enthusiast
Joined: Feb 2007
Posts: 347
north west, IN
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my 400-451 w/rpms have been 9.76@135.6 in 3640lbs b-body. i just mch cnc port, then opened the ports to mw and added a indy intake.
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Re: Edelbrock rpm head questions.....................
[Re: Thumperdart]
#1092096
10/13/11 01:54 PM
10/13/11 01:54 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
Quote:
Have you tried locating any pics of MCH's CNC-ported Edelbrocks or Stealth heads to get a feel for what Jeff does? Just a thought...
No I havn`t but I`ll look em up. I`m going to a 2.19 intake valve and the necessary bowl work to take advantage of it so, we`ll soon see.
FWIW, going to a bigger valve w/o the rest of the port being able to support it won't show much gains. I did the 2.19" upgrade on a set of nicely ported OEM iron castings flowing 270+ and it only picked up maybe 3-4 cfm in the mid lifts w/o any peak gains to speak of.
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