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Edelbrock rpm head questions..................... #1092037
10/10/11 12:45 PM
10/10/11 12:45 PM
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Thumperdart Offline OP
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I`ve been re-working my heads again because of a bet I have that someone says there`s NO WAY I can go 9.78 by rebuilding my heap so other than the tech archive photos, does any one have any otther photos I can check out or another post I can view? After intake work I ended up w/a 220cc port and my ex. went to 76cc`s which seem WAY short of the 228-81cc`s I thaught I read. Just looking for every last hp that can be gained till I get my Victors. Thankxxx guys........


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] #1092038
10/10/11 12:47 PM
10/10/11 12:47 PM
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moparniac Offline
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Maybe open them up to MW and run a Indy intake


Mopar Performance
Re: Edelbrock rpm head questions..................... [Re: moparniac] #1092039
10/10/11 12:49 PM
10/10/11 12:49 PM
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Thumperdart Offline OP
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I thaught about that but I`d like to save that energy and work for the Victors plus I need to keep it as is to make a statement and some $$$$.........


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] #1092040
10/10/11 12:54 PM
10/10/11 12:54 PM
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Val-haul-ass... eventually
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BradH Offline
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Are you doing any before & after flow bench comparisons, or are you just on 'em until you think they "look right"?

FYI, I kind of bummed out somebody else on here when I tested their home-ported RPM heads and they didn't see nearly what they'd thought they would for all the work that had been done.

Re: Edelbrock rpm head questions..................... [Re: BradH] #1092041
10/10/11 01:04 PM
10/10/11 01:04 PM
Joined: Nov 2004
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Syracuse,NY
CompWedgeEngines Offline
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Dom, I agree with Brad.

If you dont have a flow bench, and know HOW to interpret the numbers, you could be doing more damage than good. Ebrocks have a pretty good port and chamber as is, BUT, they do respond totally different, or let me put it this way, they have TOTALLY different needs from the intake ports to the exhaust ports. There are several things that they really respond well to, and other modifications that you will just go backwards or at least simply waste your time.

What I am saying is they have spoecific areas where porting and valve jobs do a great deal, as well as some other changes. If you dont know where to look for that, then I'd say stay away from them, or have an experienced porter ( somoen who knows Ebrocks) mess with them. ( not even consdiering the camshaft likes and dislikes) .\
This is exactly while you'll see some real turd Ebrock combos, and some exceptional ones, that overachieve. It comes down to the porters knowledge, and the cam combo. I have quite a few Ebrock combos out there and have found this to be true.

My experience and


RIP Monte Smith

Your work is a reflection of yourself, autograph it with quality.

WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
Re: Edelbrock rpm head questions..................... [Re: CompWedgeEngines] #1092042
10/10/11 01:09 PM
10/10/11 01:09 PM
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moparniac Offline
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I have a 1 barrel and a pile of nitrous if it will help....


Mopar Performance
Re: Edelbrock rpm head questions..................... [Re: moparniac] #1092043
10/10/11 01:14 PM
10/10/11 01:14 PM
Joined: Nov 2004
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Syracuse,NY
CompWedgeEngines Offline
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Maybe you can let him borrow your 3/4 race cam and that extra set of pop ups ?...and throw some " fifties" on the back end with some Purple Hornies?...


RIP Monte Smith

Your work is a reflection of yourself, autograph it with quality.

WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
Re: Edelbrock rpm head questions..................... [Re: BradH] #1092044
10/10/11 01:18 PM
10/10/11 01:18 PM
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Thumperdart Offline OP
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I hear what you guys are saying and I`m definately not "hacking" away at these things but more less going by the tech archive info and straightened out the head bolt buldge for a smooth transition into the bowl. I`m not asking these questions to see who I can send em to cos that`s not in the bet or Brian would have em now.........just trying to maximize my power and 9.98 ain`t too shabby considering the other issues I had. I WILL go 9.78 if it kills me...........


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: moparniac] #1092045
10/10/11 01:18 PM
10/10/11 01:18 PM
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Thumperdart Offline OP
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Quote:

I have a 1 barrel and a pile of nitrous if it will help....


No nos..........YET!


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] #1092046
10/10/11 02:17 PM
10/10/11 02:17 PM
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moparniac Offline
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What's the skinny dom? Someone bet you can't get the 78 or what ??? You one of the best working combos on here for what it is IMO ... That's gonna be tough to pull that out! I'd say the best/easiest way to do it for the cash is tow your car to one them low elevation tracks across country somewhere


Mopar Performance
Re: Edelbrock rpm head questions..................... [Re: moparniac] #1092047
10/10/11 02:30 PM
10/10/11 02:30 PM
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Thumperdart Offline OP
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I know it`s going to be tough but so am I and I love a challenge. The best track is probably Bakersfield where I went 9.98 so that may be where we end up. Time will tell..........


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: CompWedgeEngines] #1092048
10/10/11 02:55 PM
10/10/11 02:55 PM
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moparniac Offline
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Quote:

Maybe you can let him borrow your 3/4 race cam and that extra set of pop ups ?...and throw some " fifties" on the back end with some Purple Hornies?...




I was thinking splitfires and castrol syntec for starters


Mopar Performance
Re: Edelbrock rpm head questions..................... [Re: moparniac] #1092049
10/10/11 04:31 PM
10/10/11 04:31 PM
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junction city oregon
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viperblue72 Offline
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Can you lighten your car up some? 2 tenths is a lot at your level. Probably another 60 horsepower.

Re: Edelbrock rpm head questions..................... [Re: Thumperdart] #1092050
10/10/11 05:25 PM
10/10/11 05:25 PM
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Westbury, NY
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bumps440 Offline
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Doesnt sound too hard to do. tell me your combination and I bet I can get some out of it.
on your video it seems like you short shifted it. I like RPMs and a well tuned system.
I bet I have more gear, more compression, more lift.

Re: Edelbrock rpm head questions..................... [Re: Thumperdart] #1092051
10/10/11 08:17 PM
10/10/11 08:17 PM
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dennismopar73 Offline
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thumper ,, a close friend had stock eddies rpm, 452, mp intake, 13-1 comp, 8" t/a 5000 stall , dana 430 geared,31 tall tire, dominator ,on alcohol,3250 # 73 duster, all steel car!
racer brown stx 21 car ran high 9.70 low 9.80 on the back bumper!
so it can be done without going to big heads and roller stuff
and spend alot less money


Re: Edelbrock rpm head questions..................... [Re: dennismopar73] #1092052
10/10/11 08:22 PM
10/10/11 08:22 PM
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dennismopar73 Offline
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there is not enough gain in rpms heads to justify any porting to them
the one example i gave is just one there are couple others who run rpm stock, and been low 9 with them with no work at all , so they will run as stock,

Re: Edelbrock rpm head questions..................... [Re: bumps440] #1092053
10/11/11 12:20 AM
10/11/11 12:20 AM
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Thumperdart Offline OP
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Thankxxxx............my motor`s a 400/470 stroker w/a solid .680-.660 solid roller @ 12.1 comp. I did short shift but also had fuel delivery and charging issues so who knows. I know guys are running mid/high 9`s w/em and I hope to be one of those guys soon. The porting can`t hurt anything and I`d bet it will help considering I left a lot on the table the first time around.


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: viperblue72] #1092054
10/11/11 12:23 AM
10/11/11 12:23 AM
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Thumperdart Offline OP
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Quote:

Can you lighten your car up some? 2 tenths is a lot at your level. Probably another 60 horsepower.


I probably could by going w/glass doors and deck lid and lexan but it`s a street car first that I race every so often.


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] #1092055
10/11/11 11:08 AM
10/11/11 11:08 AM
Joined: May 2004
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robin hood country
deaks Offline
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About 40 hp needed, more comp would help that cam, lose some weight.
I think you're car runs well, i would like to be where you are.
Prosports car was max wedge port, tunnel ram and a bit lighter than yours and his has gone 9.77.
Mick


69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
Re: Edelbrock rpm head questions..................... [Re: deaks] #1092056
10/11/11 11:43 AM
10/11/11 11:43 AM
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junction city oregon
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viperblue72 Offline
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A good tunnel ram??? Seems that could gain a few tenths possibly.

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