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Gone in a Flash!
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Discussion Starter #1
Ok, I need an evaluation on Edelbrock Rec BBC aluminum heads. Are they any good for a lake ski boat 500" N/A -NO Spray. Hoping for around 600HP/600TQ? Are these in the quality class of the better stuff like Canfield, RHS, Dart etc or Chineesey knock off junk?--Peanut Gallery please chime in with your 2 cents please! :)Pound
 

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Premium Member
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Will they work for your goals of 600HP, yes. Are they the best choice. . . ..you'll have to give a little more info on the build. What is best is combination. You can build a "budget" engine with budget parts and a well thought out plan and have an engine that will run with others that spent big money on parts but didn't have a good recipe.
 

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just a ski boat with bark
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Not sure about the rec's but I've seen 2 sets of the preformer RPM ovals and the castings look good. However they didn't flow as well as advertised and they are a "light" casting, wasn't much room for porting without making them thin. However with that said my neighbor has been running a set on a 10.5:1 468 spraying a 250hp nitrous shot for 4 years and they haven't blown up yet. You will save around 65lbs over factory iron heads and depending what you had maybe some increase in flow but I don't think they would perforn as well as say some more performance oriented pieces in the 305-320cc runner range.

BTW: I think they will use most of the same hardware as stock heads so you may not need new longer pushrods or a different stud girdle.
 

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For the dollars spent, they are fantastic heads. They will handle/make 600+ HP with no issues on a 496/502/509. Pick a decent cam in the mid 230/240 range and the rest of the correct parts, and you will be there. For a ski boat, my choice would be to go with a 496 (stroked 454, NOT the new GM one) for the extra Tq it will make.
 

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Gone in a Flash!
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Discussion Starter #8 (Edited)
What I had in mind originally was to build a 496" with the "big name parts" but after Reality I decided that it might be overkill for a v-drive R/C lake boat. It doesn't really matter if it goes 60mph or 70mph. Its just for cruising and skiing so I thought, go for best bang for the buck. Basically a GM four bolt block with a Forged Scat or Eagle crank with the matching rods, matching SRP 9.5/1 slugs. A Struab Roller 240*/050 Dura. cam topped off with a Ebrock RPM Air Gap D/P fed by a 850cfm Marine Demon to max out the mid range. I want to build it one time and not rebuild every year. AFR's are great heads and I wanted to go that way, but they are some serious coin. I figure at least 3 grand by the time you include the Inconel valves and hardware. I'm just exploring other possibilities, hence the questions about the Ebrocks :)bulb
 

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Cantard
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What I had in mind originally was to build a 496" with the "big name parts" but after Reality I decided that it might be overkill for a v-drive R/C lake boat. It doesn't really matter if it goes 60mph or 70mph. Its just for cruising and skiing so I thought, go for best bang for the buck. Basically a GM four bolt block with a Forged Scat or Eagle crank with the matching rods, matching SRP 9.5/1 slugs. A Struab Roller 240*/050 Dura. cam topped off with a Ebrock RPM Air Gap D/P fed by a 850cfm Marine Demon to max out the mid range. I want to build it one time and not rebuild every year. AFR's are great heads and I wanted to go that way, but they are some serious coin. I figure at least 3 grand by the time you include the Inconel valves and hardware. I'm just exploring other possibilities, hence the questions about the Ebrocks :)bulb
I think you would have a very sweet setup that you would be very happy with if you build what you have just described. I have done the same combo but with there ovals and it turned out much better than expected. You will be happy.
 

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steelcomp was here
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26,512 Posts
What I had in mind originally was to build a 496" with the "big name parts" but after Reality I decided that it might be overkill for a v-drive R/C lake boat. It doesn't really matter if it goes 60mph or 70mph. Its just for cruising and skiing so I thought, go for best bang for the buck. Basically a GM four bolt block with a Forged Scat or Eagle crank with the matching rods, matching SRP 9.5/1 slugs. A Struab Roller 240*/050 Dura. cam topped off with a Ebrock RPM Air Gap D/P fed by a 850cfm Marine Demon to max out the mid range. I want to build it one time and not rebuild every year. AFR's are great heads and I wanted to go that way, but they are some serious coin. I figure at least 3 grand by the time you include the Inconel valves and hardware. I'm just exploring other possibilities, hence the questions about the Ebrocks :)bulb
For a 496, I'd take a look at the Canfield 310's. IMO a much better head than the Ede. I'm not knocking the Ede, just giving my opinion. Can's are a good, solid head, and very reasonably priced. Thick decks, raised ex port, good intake, etc. You'll need different head bolts/studs and pushrods, but IMO worth the upgrade over the Edelbrocks.

Here's a comparison

Edelbrock Victor Rect port 320cc

1 86/64
2 163/121
3 244/169
4 296/206
5 323/236
6 332/258
7 341/276

Canfield 310

1 72/74
2 138/123
3 204/176
4 266/205
5 318/237
6 347/260
7 353/273
8 355/284

Canfields I just did with only a bowl blend, ex were right there. @ 284

1 74
2 142
3 212
4 278
5 331
6 355
7 358
8 355

Canfields I did for my 467. These were flowed on a 4.31 bore fixture which explains the upper numbers being less than the others, which were flowed on a 4.500 bore fixture. Remember these are a 310cc intake, not a 320. This was a port match and bowl blend, but nothing done to change the port shape. The exhaust was basically the same, except I raised the port roof about .080" and did some work in the chamber around the ex valve and a radiused seat.
1 74/66
2 165/135
3 244/179
4 294/216
5 327/251
6 340/280
7 344/298
8 347/312
 

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Banned
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The Edelbrock Marine's are good for the money. Hard anodized and come with iconel exhaust valves. They do not have springs/retianers/locks. They'll support your hp goals with a normal cam.

If you are looking for more hp than jump right in and get the AFR's. Great heads and great customer service.

I liked the Canfields until I had to deal with their customer service. Was very poor. It was just two seperate occasions but was horrible enough I said never again. Others experiences I'm sure will be different, but I will not go thru that again.
 

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If money is a issue, the RHS heads for your 600hp estimate arent a bad way to go and you might like the iron for low maint.
If money isnt an issue, AFR 305s hands down and can grow with your hp needs.
If you have a line on the Vic Eddys, Take them they are a good head and with porting flow really good. Like GN7 said check valves and guides.
The Eddy perf RPMS arent to bad to 600hp. really no room to grow.
 

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E-7 Sheepdog (ret)
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One issue with edel's regular head for marine use is that the valves are suspect. Can't say about the Marine version as I have no knowledge as to their worthyness. But I just would not consider using regular "assembled" edelbrock heads. Actually I don't use anybody's "assembled" heads
That would be my deal. Order the heads bare and assemble them with the parts you want, thus having just what you want, instead of having a bunch of "spare" parts you now have to try to ditch.
 
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