Big Block Edelbrock limitations.

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furyus2

furyus2

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This question is about my 64 Sport Fury with a 440. The engine is a .030 440 with RPM heads. I also have the RPM intake. What is the power limitations of these parts? I want to freshen up the engine, but curious how much power I can get from these parts I already have. I'm adding that the heads are box stock.
 
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furyus2 said:
I guess I needed to be clearer. I'm asking about a box stock set of heads. No porting. I know that porting adds a bunch of power. I want to do this on a budget, using the parts I have.
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Edelbrock has the flow numbers listed on their site for all their heads. That should give you a pretty good idea of what the power limits will be in stock form.
 
Those heads are small i have a set on my 426 low deck. they only have a 220 cc intake runner. Go with the TFS 240 heads you will be further ahead. i made 525 hp and 552 tq with rpm performer heads and dual plane intake. All out of the box.
 
In stock form the heads and intake are probably capable of 600 HP/600 TQ. How much YOU and your freshened 440 are capable of is UNKNOWN.
 
The ponies depend a lot on ur engine build/builder and parts supply. The tune will have a big effect also. Ur car is also a big part of the puzzle. Kim
 
IQ52 said:
In stock form the heads and intake are probably capable of 600 HP/600 TQ. How much YOU and your freshened 440 are capable of is UNKNOWN.
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You are really being generous on horsepower for a head that flows around 275 cfm max out of the box at 700-750 lift. How big a cam is he going with. 650 at most I would bet, probably lower. Then subtract .035 for lash and pushrod deflection what are those heads flowing now at his lift. Now add in how much he will lose with an out of the box intake. Hmmmm 600 horsepower, I don’t think so.
 
dano said:
In for pics of the 64. One of my favorite Mopar bodies next to the 68 Coronet R/T.
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Well, since you guys are asking, The current combo is a.030 440, 1973 block. Cast crank setup, TRW 9 to1 pistons. I know the compression is lower. Cam is a Hughes flat tappet hydraulic with .504 intake, .515 ex. Duration is 272/276* . Heads are Eddy RPMS, 84 cc. with .030 shaved off the block side. Intake was milled too, but I forgot what the formula was, but I can run any intake. Carb is a 750 cfm Race Demon. The converter is an ATI. It doesn't stall like I think it should. Starts pushing the front tires at 1200rpm. Supposed to be a 3k converter. 727 TF full manual VB. Rear is a locker with 3.91 gears. Shifted at 5500 rpm. Ran a best of 12.12 @110mph I believe the 60 foot was 1.76. On pump gas. I think it's at the limit of it's performance, and would like to of course make it perform better. Deep in the 11's would be nice, but I don't want to empty my wallet to accomplish it. That's why asking how much the RPM products can "support". Thanks!
 
pittsburghracer said:
You are really being generous on horsepower for a head that flows around 275 cfm max out of the box at 700-750 lift. How big a cam is he going with. 650 at most I would bet, probably lower. Then subtract .035 for lash and pushrod deflection what are those heads flowing now at his lift. Now add in how much he will lose with an out of the box intake. Hmmmm 600 horsepower, I don’t think so.
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I completely understand. My maximum horsepower estimates for the Edelbrock 440 RPM cylinder heads have been doubted before, even laughed at. It's why I gave my opinion on what I believe I could get from the stock items, and why I said I had no idea what he personally could make.
 
IQ52 said:
I completely understand. My maximum horsepower estimates for the Edelbrock 440 RPM cylinder heads have been doubted before, even laughed at. It's why I gave my opinion on what I believe I could get from the stock items, and why I said I had no idea what he personally could make.
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Given the initial lack of info and the basic general question asked, that field is wide open to an estimated output. How far does one (or can) push it for there given parameters is the limitations of ether the wallet or head or engine combo parts.

Running the head stock with the goal of pushing it as far as possible is way different than the street machine spelled out above. Though it does make one wonder what a 15-1 - 440 w/stock bottom of the page cam, etc.... Edelbrock heads could do
 
Jim just told us what they can do. U can tell by the builds he posted that his engines are no slouch. His hp per cid are right up there with the best of them. It’s only money, how fast do u want to go. Kim
 
rumblefish360 said:
Given the initial lack of info and the basic general question asked, that field is wide open to an estimated output. How far does one (or can) push it for there given parameters is the limitations of ether the wallet or head or engine combo parts.

Running the head stock with the goal of pushing it as far as possible is way different than the street machine spelled out above. Though it does make one wonder what a 15-1 - 440 w/stock bottom of the page cam, etc.... Edelbrock heads could do
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Not to long ago I received a PM, "Why did my engine break when I was only cruising at 2,800 rpm?" And that was the sum total of information provided on an engine I had never seen. Needless to say my response was silence.
 
IQ52 said:
Not to long ago I received a PM, "Why did my engine break when I was only cruising at 2,800 rpm?" And that was the sum total of information provided on an engine I had never seen. Needless to say my response was silence.
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:rofl:
oldkimmer said:
Jim just told us what they can do. U can tell by the builds he posted that his engines are no slouch. His hp per cid are right up there with the best of them. It’s only money, how fast do u want to go. Kim
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As I was hinting at, it’s just not the money but the perimeters of the build. What are you willing to live with in the street or is this a track only car?

I always say it’s just money, I can always make more, but it flows only so fast!LMAO
 
While I appreciate all the replies, I think some are going off the rails. I already mentioned that the converter isn't right. Nor did it have anything to do with the original question.
Also, anyone can see this isn't a full time race car. That isn't the original question either.
So, I simply wanted to know how much horsepower a set of stock rpm heads & intake can support/produce. I do realize that everything else contributes to horsepower,
That way I can think about what I would do on the bottom end. The engine is tired. I built it 20 years ago. It will need going through. So, if I have to go through the bottom end, I want to know where I stand powerwise on the heads/intake. The questions about stroke, bore, compression ratio, cam, etc. are for later.
The only one who gave any answer to the question id IQ52.
 
furyus2 said:
This question is about my 64 Sport Fury with a 440. The engine is a .030 440 with RPM heads. I also have the RPM intake. What is the power limitations of these parts? I want to freshen up the engine, but curious how much power I can get from these parts I already have.
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Typical guy bolting parts on an engine in his garage will end up with around 400 hp from a rebuilt 440 with Edelbrock heads. That might not sound like a lot but it is enough to push your car harder than it was designed to go. Early B body cars are dangerous with that level of power unless you've updated the suspension and brakes.
 
U never mentioned the engine was old and tired and that u were gonna do a refresh/rebuild. U said Jim gave u the only answer. If u think u can do 600/600 on pennies ur sadly mistaken. It takes precision machine work, not the run of the mill overhaul. It won’t be a very drivable street car at 600/600. Kim
 
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oldkimmer said:
U never mentioned the engine was old and tired and that u were gonna do a refresh/rebuild. U said Jim gave u the only answer. If u think u can do 600/600 on pennies ur sadly mistaken. It takes precision machine work, not the run of the mill overhaul. It won’t be a very drivable street car at 600/600. Kim
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The engine being tired has nothing to do with the power capabilities of the heads. I never said I was going to build a 600 hp engine. So far, I've had 2 clear opinions on the original question. If you can't answer the original question, move on.
 
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