Thinking of buying a pair of Gen 2 Edelbrock Hemi Heads.

[Fran Blacker]

Jeg's is selling Edelbrock Hemi heads complete really "cheap". $1250 for roller and $1220 for hydraulic heads and with coupon code $100 off on $1200+ purchase. Wonder if you need to play the game with 2 separate purchases ?
I know not to trust the valve job on the heads. What is the difference between roller and hyd heads, valve springs?
The install is an other issue because my bore is 4.28" they say 4.37" minimum. Is it as simple? as eyebrowing the block .090" at top of bore and .090 down? Any other warnings? Not sure I want to get into that, but what the hell.

 

[rumblefish360]

Fran, I don’t see where it says min. bore size of engine for use with the heads but I did see min. gasket size.

PDF —-> https://edelbrock-instructions-v1.s3.amazonaws.com/edelbrock/61189.pdf

OH, the different springs dates are also listed.

 

[Fran Blacker]

Last line in Piston to valve to valve to bore and piston to head clearance. Not sure about what you mean by spring dates or is that a typo and meant rates? Where exactly did you see that Ididn't look in roller details.
Thanks

 

[Polara426]

Used a set on a 4.28 bore no problems with valve clearance. We were happy with the tolerance did have an issue with the after market rocker stands had to clearance something just don't remember where. Make sure you install the Orings in the head for the tubes before you assemble the rockers.

 

[rumblefish360]

Last line in Piston to valve to valve to bore and piston to head clearance.

That states what they want you to have. It is not a bore limitation.

Not sure about what you mean by spring dates or is that a typo and meant rates?

I’ll assume that is a joke.

Where exactly did you see that Ididn't look in roller details.
Thanks

You got it! Your homework done for you.
Page 2, right side, under speciations.
It reads;

SPECIFICATIONS:
Head Bolt Torque:
Deck Thickness:
Combustion Chamber Volume: Valve Size (Except for 61169):
Valve Seats:
Valve Spring Diameter:
Valve Spring Installed Height: Valve Spring Seat Pressure:
Hydraulic Roller Cam
Flat Tappet Cam
Valve Spring Open Pressure
Hydraulic Roller Cam
Flat Tappet Cam Max. Valve Lift:
Coil Bind
Replacement Valve Springs:
Victor Jr. Cylinder Head Bolt Torque Spec
(Torque specs below only apply if using ARP Ultra-Torque Fastener Assembly Lubricant; included with head ARP head bolt kits. If using other fastener lubricant(s), please use manufacturer’s recommended torque specs.)
See Figure 1, or use head bolt manufacturer’s specifications 5/8”
170 cc
Intake - 2.320”
Exhaust - 1.940”
Hardened ductile iron, non- interlocking, compatible with unleaded fuel
1.540”
1.880”
151 lbs. @ 1.880” 133 lbs. @ 1.880”
414 lbs. @ .600” Lift 349 lbs. @ .600” Lift .700”
1.120”
#5821 - Hydraulic Roller Cam #5792 - Flat Tappet Cam

 

[Fran Blacker]

Snipped this from this website. From what @Polara426 said you don't need eyebrows, easy to check just in case. https://www.enginelabs.com/engine-t...ormance-with-edelbrock-gen-ii-426-hemi-heads/

 

[Polara426]

I have a fairly mild cam I am sure if you are using something aggressive may be an issue but when building a Gen 2 you better check everything.

 

[Fran Blacker]

Cam is 246*@.050 Lift .535 Int .525 ext appox.

 

[wyrmrider]

fran first call eric at stage V and think of ras for valve gear

 

[Fran Blacker]

fran first call eric at stage V and think of ras for valve gear

Excuse my ignorance RAS? Rocker Arm Supports.

 

[PRHeads]

The Ede Victor hemi heads are a flat out bargain.
But....... that doesn’t make them the best choice for every application.

Big intake valves and intake runners don’t make this a great choice for modest cube street builds.

I probably wouldn’t put them on a street or street/mild strip build under about 500 cubes.
Especially if the build leans towards the milder end of the spectrum.

 

[Fran Blacker]

The Ede Victor hemi heads are a flat out bargain.
But....... that doesn’t make them the best choice for every application.

Big intake valves and intake runners don’t make this a great choice for modest cube street builds.

I probably wouldn’t put them on a street or street/mild strip build under about 500 cubes.
Especially if the build leans towards the milder end of the spectrum.

Would prefer MP heads. Just did a little estimating, would get MP bare heads, buy intake valves (have NOS Ext V's) and strip my heads of springs etc.. Would end up close to the same price. Might be a better plan. If I can't pay a few extra bucks I should be buying. Thanks for talking sense.

 

[PRHeads]

The current MP G2 hemi heads are made by Edelbrock.
They are also a very nice head.

If they’re still available assembled, I’d just get them that way.

P5153875

 

[wyrmrider]

Rocker arm specialists in anderson ca can steer you right on the rocker arms and stands
good choice backing off with that stroker part
I used to use Stage V a lot- straight shooters
had the 440 block conversion
Just an aside
saw where they claimed that the exhaust did not need any work
All the stock heads were "rolledover"to fit in the chassis better
no question that that hurt the exhaust
I have no idea why they would have any questions that it could not be improved
On those big valve heads I think you might have been facing filling the ports
Bob Mullen used to make a road race head that made a great street head

good points PRH

 

[Fran Blacker]

PRHeads made a good point about the heads flow to much for a street engine.