512 Build Thoughts?

[Mike DC]

   
Just curious for some opinions - what factor starts to make the valvetrain important on a setup like this?  The rest of the motor isn't a high-RPM race build. 

[Charger 512]

I don't really care if it looks stock, that is pretty much out the door anyway especially when anyone hears it. 

440 Block
512 Stroker kit from 440 source
Stealth heads (cleaned up)
Comp Cam Xtreme Energy Hi-Lift .564
Comp Cams Pro Magnum Hydraulic Lifters
COMP Cams Pro Magnum Shaft Mount Roller Rocker Arms 1621-16
Comp Cams Dual Valve Springs for Hyd Cams
Holley Street Dominator intake
Quick Fuel 850 cfm carb with 1/2" spacer

Are you useing a Hydraulic Roller Cam? or a Flat Tappet Cam!
Melling M-63HV High Volume Oil Pump

[comet_666]

In talking to my engine builder he is thinking about wanting to use Edelbrock Victor Heads. Anyone have any thoughts on them? I know they are a different animal all together and need to use some specific parts.

[Charger 512]

Your running around in Circles,I would go with a combo on here that has the #no's

[c00nhunterjoe]

I fell that the 500" + builds would benefit from the max wedge ports.

[Challenger340]

   
Just curious for some opinions - what factor starts to make the valvetrain important on a setup like this?  The rest of the motor isn't a high-RPM race build. 

Intended Camshaft and Valve Spring pressure, in conjunction with rpm.

Stock "stamped steel" Rockers saw about 85-95# seat pressures, with 250-260# maybe? tops "over the nose" on the Cam, and what 5000-5200 rpm ?
Now, and remember here....
Strokers eat up duration @ .050 on a Cam ? what lobe events may rev 5,000rpm on a 440 ? when applied to a 14% larger "500" inch build may only result in 14% lower rpm capabilities or a 4300 rpm truck motor ?
More going on obviously than this.... just an example for the demonstrated need to investigate....
as it relates to upgrading Cams..... then corresponding Rockers, Springs, valvetrains etc to "keep up" 

[Mike DC]

You're saying it's mainly the increased spring pressures, which are required for the bigger cams to fill the bigger heads?

[BSB67]

In talking to my engine builder he is thinking about wanting to use Edelbrock Victor Heads. Anyone have any thoughts on them? I know they are a different animal all together and need to use some specific parts.

Why?

With Eddy heads, you can easily make 600 hp, run tens at the track (after you install a roll bar), and pull the front wheels off the ground.

No offense, but based on your posts, I don't think you are ready for, or need Victor's.

It is a little scary to me that your engine builder would recommend this for you.

[deepockets]

I Totally agree with BSB67. My last build was with the victors. Yes there's going to be HP gains. Even with going to .180 offset lifters and high dollar offset rocker arms, you'll still have some crazy pushrod angles. Go with the rpm's and get them ported for great HP numbers, without using fancy rocker gear. You can't run offset lifters unless you go roller. You can see the angles in the picture.

[Mike DC]

  


Mother Mopar already built a cylinder head that outflowed the Max Wedges back in the 1960s. 

By the time you're into all the customization of the Eddy Victors . . . aftermarket heads, entire valvetrain, intake, exhaust . . . and the power levels those heads make, it brings up the question of an aftermarket block . . .

[Challenger340]

By suggesting Victors,
I'm guessing your builder is addressing YOUR stated hp/trq needs for the build, and the easiest way to get there parts wise ? Not to mention future upgrades if they are ever contemplated.

It would be the same for me, in that if someone is targeting 600+ at the outset, that is most certainly entering the Victor's "niche" power area, and leaving the Eddy's best application ?

You can DO anything... WITH pretty much anything.... it's just that some "things" are easier to do it with ?

An example;
I've made a documented 850 hp using an INDY "sr" Head .... waaaaay out of it's league, but it was just to prove I could do it.
Was it smart ? or cost effective ?
NO and NO !
But it may be bragging rights, because I don't think anyone(that I know of), has surpassed that HP mark using the "sr" head ?
https://www.youtube.com/watch?v=VzWhkC4dAI0

[comet_666]

Back to stealth heads... would you get them bare and clean them up and assemble yourself with new springs etc....or finished and clean them up?