Edelbrock heads, simply bolt on?

[Moparman01]

I always thought that Edelbrocks Performer RPM Series heads were simple bolt on and go parts, but after some reading i have my doubts now. Here's my problem, i've had so many over heating issues with the 440 in my 69 Charger that i've finally had enough and am gonna do a fresh new engine for the car. I'm looking at profesionally built short blocks right now, and i can get a killer deal on a brand new set of Eddy RPM heads and mathced cam kit. I was reading about the heads and it say's must have propper valve reliefs in the pistons, pistons must be .100" above the deck and TDC, and use an adjustable set of rocker arms with the correct length push rods. So the stock style rocker/push rod system won't work with Eddy heads?? I'm not building a race enging, just good reliable drive anywhere street motor. I'm looking for as much info as i can get before i go ahead and buy the heads and cam, so if anyone has expirience with the Edelbrock heads/cams please let me know!! 

[frederick]

I'd say bolt on depends on what you intend to do with it; the more hp you want to extract from the heads the higher the necessity to check things.
From what I've read is that for a mild build they are pretty much bolt on.
But I'd check the valve seats and guides anyway, with 1400$ invested I'd rather be safe than sorry.

Pistons .100 above deck???
Don't think that will work.

If you need valve reliefs and adjustable rockers depends on the camshaft.
The stock stamped rockers will work with a mild cam.

As for the Edelbrock rpm camshaft, let me just say that there are better cams.

You have seen the topic on overheating?
http://www.dodgecharger.com/forum/index.php/topic,60599.0.html

Cheers,

Frederick

[flyinlow]

Which Eddy heads? Closed chamber 84 cc heads dont need pop up pistons. Open chamber 88 cc might.

I just bolted mine on a mild 446. Felpro gaskets and ARP bolts. 14,000 miles so far. Great heads.

They do seam to put more heat into the coolant. Might want to fix the overheat problem first. Aluminum heads are not as forgiving as cast iron.   

[Moparman01]

Cool, maybe i was reading litature on the heads wrong, but i know i read something about needing to have pistons the are .100" above the deck at TDC. Yeah i'd go with 84cc heads, i'm not worried about fixing the over-heating issue since i'm goin with a fully new motor, the current motor is coming out and done. I've been working on (more like fighting) the over-heating issue for over 3 years now, and when i say i've tried it all, i mean i've tried it all!!! Something is internally wrong with the engine, all the work i've done plus i've had it to shop after shop and no one can figure it out, process of elimination has narrowed it down to something in wrong with the block, or maybe cracked heads, so i'm not even gonna mess with it anymore and am planning a new engine build and would like to go with a fresh short block for a reputable builder, and like a i said i can get a major discount on a new set of Eddy heads and cam kit (my father works for a auto parts wharehouse and can get them at wholesale cost). Thats my plan, gotta do my homework first!

[Hot_Rodder]

I read this on their site:
88cc chambers are machined .100" for clearance with quench dome style pistons
If you're gonna run the 84cc closed chamber heads, I'd just run some flat tops, keep in mind the compression ratio when selecting a set of pistons based on the 84cc closed chamber plus bore diameter, gasket compressed volume and gasket bore diameter, ect... And as already said, there are other, and better, cams out there to choose from. Just because Edelbrock has a total power package, doesn't mean that it can't be improved on, lol.

Looks like the part # you want is, 60929*
Flow Spec's:
Valve Lift     .100"     .200"     .300"     .400"     .500"     .600"     .700"
Intake    79            143             207             256             278             291             292
Exhaust    70            126             160           188             206             217             223

I also did a little more reading, http://www.edelbrock.com/automotive_new/misc/tech_center/install/6000/60929.pdf, and as I said above, I'd run the lat tops with the 84 cc closed chamber, then once your cam is installed and such, I'd turn the motor by hand, and watch the rocker arm movement in reguards to the valve tip... See where it rides on the valve tip, should be in the middle of it. Then take it from there. With my motor, I'm gonna get an adjustable pushrod and do a different pushrod set, mostly due to the fact that my heads have been milled so that changes things a lil bit, also the block may end up getting milled too... If so, I may end up going with a slightly thicker gasket to help make up some of the distance change, but in doing so, I'll end up sacrificing some compression, so I may not, lol.

[Purple440]

I've been wondering the same thing as I contemplate going with Eddy's vs Stealth heads.  I just calculated out the price differences and after you add locks, retainers, and labor cost to install those, my calculations told me that the Eddy's were $98 more expensive per head.

I also have a mild 446 and was hoping to bolt on the Eddy's and not have to worry about a bunch of machine work or breakage.

- Doug

[Hot_Rodder]

I ended up going with the Stealths b/c of price... The only thing that is still on the heads that are from 440 Source are the valves and the aluminum casting... And not even all that is still there. I'm going to try and post two pic's, hopefully the file want be too large... Since Photobucket is acting up on my part, I'm gonna have to try and post these from my comp which they may end up being way too big... .... Well, I want be able to post from my comp, file is a good 3 times max allowed bytes, lol, so I gotta wait for photobucket so I can get some link off of it and post them for the pic's of my customized Stealth heads as is...

Ah, it just loaded, here are two links, one of the intake ports and one of the exhaust ports...


And just for the heck of it, combustion chambers:

Enjoy if possible, lol.

[chargerbr549]

One more thing on the eddys they have angled spark plugs so it might cause some clearance issues with factory manifolds or headers (from what I have read) or get the eddy heads that are supplied through mopar performance since they come with straight spark plugs like the factory heads or get the 440 source heads.

Kevin

[flyinlow]

I called Edelbrock before I bought mine. They said the angle plug was worth about 15 HP on a 500HP build. They make the Mopar heads which have straight plugs.