Attention Edelbrock head users

jeepsr4ever

After talking with a engineer at edelbrock we found out these things. 1. the first batch of heads had a strong spring rate 135lbs (too strong for a mild hydralic lifter camshaft) 2. they will be using a different spring on future heads 3. their is no warrantee as of right now on head springs 4. to change the springs you will need new spring retainers :sa:

Dusty

Heres the scoop after sending them back my heads, they discovered that the spring seats were too shallow, my heads had in excess of 145# seat pressure, they recut the valve spring seats and the head now test at 115 lbs roughly. They also appologized for scoffing at me for so long thinking i was full of BS telling them they were too tight, finally had to send them the heads and let them see for themselves in the end it turned out to be a little more involved. Curt at edelbrock redid the heads and Dave from Warranty was the one that helped me. Thanks MC for the Help in the matter. Thanks Edelbrock for standing behind your product. Heads will be here on Moday or Tuesday :lo1l: Actually sent me a new set of heads 111!!! Works for me,

TexasJ10

I don't have any easy way to measure the seat pressures on mine. Is there any way to measure the seat depth instead to see if they need recut? If not I guess I will have to take them somewhere to be tested? Does Edlebrock plan a recall? :-|

Mudrat

Hey Texas - unless you plan to do a lot of building and testing, it will be cheaper to have someone else do the tests for ya ...

Check out these prices!! http://www.power-t.com/spring/price.html

Mudrat

Dusty

TexasJ10 wrote
I don't have any easy way to measure the seat pressures on mine. Is there any way to measure the seat depth instead to see if they need recut? If not I guess I will have to take them somewhere to be tested? Does Edlebrock plan a recall? :-|

No recall from what i heard, but drop them off at a machine shop have them check just a couple of the springs, if 1 or 2 are high odds are you've got one of the early sets. if not they should test out just fine. Mine were bought in the first batch of heads through MC when we did the group buy right after they released em.

TexasJ10

I bought mine in the group buy as well. I guess I better get them tested.

Dusty

intake runners are smaller than stock. :!: velocity?

I like the improved drain backs.
Valves are great, valve springs locks ect are all good.
Exhaust bowls are opened up and there is lots of room to expand port out
Excellent product overall

So to recap before my ramblings

-You need 4 shorter 1/2" or 7/16" head bolts that should come in the kit though didnt in either set of heads i got.

-You need a specific longer pushrods- just order em with the heads

-Pushrod tube holes dont exactly line up be prepared to grind some to open them up and cleanance them

-most headers and manifolds have a clearance issue withthe outside headbolts by the exhaust ports you will have to grind the maifold or header to make them fit. (i dont have the shorties they probably do without mods)

-3/8 roller rocker studs are provided get 3/8 roller rockers :t:

-NGK style spark plugs ask for a recommendation and number from edelbrock. :t:

-Hopefully they send instructions or info about the heads with the present sets of heads since i have given up on trying to get them now sine the heads are on and engine is in.

As to the heads read this and understand the variations that exist with an aftermarket replacement. But i am extremely happy that Edelbrock has fianlly stepped up and helped the AMC crowd. Now all we need is an EGR and CARB number for the EFI and then there iwll be even more guys converting thier old post 1975 Gagoneers and AMCs to fuel injection in california

Mudrat

Quite the story there Dusty - everything running OK now? Mudrat

pyagid

hmmm so it sounds like 90% of the "Bolt on" Items i have ever bought glad you got it going though -Paul