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Re: Edelbrock rpm head questions..................... [Re: Thumperdart] #1092077
10/11/11 09:08 PM
10/11/11 09:08 PM
Joined: Jan 2003
Posts: 5,484
SoCal
Brian Hafliger Offline
master
Brian Hafliger  Offline
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SoCal
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
Re: Edelbrock rpm head questions..................... [Re: Brian Hafliger] #1092078
10/11/11 09:13 PM
10/11/11 09:13 PM
Joined: Jul 2004
Posts: 19,317
State of confusion
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Thumperdart Offline OP
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Thumperdart  Offline OP
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Thankxxx Brian.........any photos? You would of got my heads but I`m gonna do everything to win this bet w/just my dumb a$$ only doin the work.


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Edelbrock rpm head questions..................... [Re: Thumperdart] #1092079
10/11/11 09:55 PM
10/11/11 09:55 PM
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
WILD BILL Offline
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WILD BILL  Offline
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BROOK PARK, OH
Sorry Dom, I can't find any of my build sheets.

Re: Edelbrock rpm head questions..................... [Re: WILD BILL] #1092080
10/11/11 10:13 PM
10/11/11 10:13 PM
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Thumperdart Offline OP
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No problem........maybe Scott can shoot those #`s to ya! I`m in no hurry and still waiting on my block so I`m leaving no rock unturned on this thing and will milk every bit of power I can find.


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Edelbrock rpm head questions..................... [Re: Thumperdart] #1092081
10/11/11 11:36 PM
10/11/11 11:36 PM
Joined: Oct 2003
Posts: 1,170
Westbury, NY
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bumps440 Offline
super gas
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Joined: Oct 2003
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Westbury, NY
I personally have NEVER had good luck with a 4 hole spacer.
I have about 1.5 inches of open spacer on mine.( tarantula) you have enough carb there. so IMO the best bet would be 1.6 rockers. you would most likely gain even if you used 1.6 only on the intake. and tightened up the exhaust lash a bit.
try some lash changes at the track.
Good luck to you .
cant suggest anything else that doesnt involve a lot of money (porting and bigger valves)

Re: Edelbrock rpm head questions..................... [Re: bumps440] #1092082
10/11/11 11:40 PM
10/11/11 11:40 PM
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Thumperdart Offline OP
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Thankxxx............the four hole is only a 1/2" and more less there to keep the carb`s guts from falling in the motor but I must say my afr`s sure cleaned up w/it.


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Edelbrock rpm head questions..................... [Re: bumps440] #1092083
10/11/11 11:58 PM
10/11/11 11:58 PM
Joined: Feb 2005
Posts: 20,116
PA.
pittsburghracer Online work
"Little"John
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PA.
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
9.42@138.27

Livin and lovin life one day at a time




Re: Edelbrock rpm head questions..................... [Re: pittsburghracer] #1092084
10/12/11 01:03 AM
10/12/11 01:03 AM
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Thumperdart Offline OP
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Thankxxx.............I may go to bigger intakes but we`ll soon see.


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Edelbrock rpm head questions..................... [Re: Thumperdart] #1092085
10/12/11 04:57 AM
10/12/11 04:57 AM
Joined: Jul 2004
Posts: 4,384
Worst Weather USA
493_DART Offline
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493_DART  Offline
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Worst Weather USA
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

Re: Edelbrock rpm head questions..................... [Re: 493_DART] #1092086
10/12/11 11:41 AM
10/12/11 11:41 AM
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Thumperdart Offline OP
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Man that`s haulin............makes me want to throw in the towel. Not...........after looking at my notes, my car`s right at 3200 w/me and about 10 gallons of gas so 2800lbs would put me REAL close to the mid 9`s depending on what the fuel system, charging problems and the freshen gives me...........we`ll see.


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Edelbrock rpm head questions..................... [Re: Thumperdart] #1092087
10/12/11 11:42 PM
10/12/11 11:42 PM
Joined: Jul 2004
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Thumperdart Offline OP
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So, does anyone have a part number for some 2.18 or 2.19 intake valves that are the lengths of the e-head valves? George found some but only in 3/8`s that are the same length. Thankxxx........


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Edelbrock rpm head questions..................... [Re: Thumperdart] #1092088
10/13/11 12:25 AM
10/13/11 12:25 AM
Joined: Feb 2005
Posts: 20,116
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pittsburghracer Online work
"Little"John
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Just did a quick check and I am not sure this would work but check these out. http://www.hughesengines.com/Index/produ...mp;partid=10246


1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: Edelbrock rpm head questions..................... [Re: pittsburghracer] #1092089
10/13/11 12:31 AM
10/13/11 12:31 AM
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Posts: 19,317
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Thumperdart Offline OP
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Thankxxxx John...........


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Edelbrock rpm head questions..................... [Re: Thumperdart] #1092090
10/13/11 12:35 AM
10/13/11 12:35 AM
Joined: Feb 2005
Posts: 20,116
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pittsburghracer Online work
"Little"John
pittsburghracer  Online Work
"Little"John

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Posts: 20,116
PA.
Quote:

Thankxxxx John...........



Your welcome.


1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: Edelbrock rpm head questions..................... [Re: pittsburghracer] #1092091
10/13/11 10:58 AM
10/13/11 10:58 AM
Joined: Jan 2003
Posts: 25,851
United Socialist States of Ame...
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tboomer Offline
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Pretty good thread,Thumpman! I will be watching this as I may also have to use what I already have!!


The end is near.....
Re: Edelbrock rpm head questions..................... [Re: Thumperdart] #1092092
10/13/11 12:45 PM
10/13/11 12:45 PM
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
B
BradH Offline
Taking time off to work on my car
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Val-haul-ass... eventually
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...

Re: Edelbrock rpm head questions..................... [Re: pittsburghracer] #1092093
10/13/11 12:55 PM
10/13/11 12:55 PM
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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BradH Offline
Taking time off to work on my car
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Val-haul-ass... eventually
Quote:

Just did a quick check and I am not sure this would work but check these out. http://www.hughesengines.com/Index/produ...mp;partid=10246



That'll work, but it's not as nice a valve as the original stuff that Edelbrock uses.

Re: Edelbrock rpm head questions..................... [Re: BradH] #1092094
10/13/11 01:18 PM
10/13/11 01:18 PM
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Thumperdart Offline OP
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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.


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Edelbrock rpm head questions..................... [Re: Thumperdart] #1092095
10/13/11 01:46 PM
10/13/11 01:46 PM
Joined: Feb 2007
Posts: 347
north west, IN
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larry890 Offline
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north west, IN
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.

Re: Edelbrock rpm head questions..................... [Re: Thumperdart] #1092096
10/13/11 01:54 PM
10/13/11 01:54 PM
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
B
BradH Offline
Taking time off to work on my car
BradH  Offline
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Val-haul-ass... eventually
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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