|
|
|
Your donations help keep this valuable resource free and growing. Thank you.
|
Edelbrock heads/extra head bolts |
Post Reply 
|
| Author | |
i6cj7 
AMC Apprentice 
Joined: Feb/20/2018 Location: virginia Status: Offline Points: 139 |
 Post Options
 Thanks(0)
 Quote Reply
 Topic: Edelbrock heads/extra head boltsPosted: May/20/2018 at 9:22pm |
|
If running less than 10-psi of boost in a 401, would having the extra head bolts machined be necessary or possible in the edelbrock heads or not? Or would O-ringing the block be better?
|
|
 |
|
|
gremlinsteve
AMC Addicted 
Joined: Dec/16/2008 Location: houston Status: Offline Points: 884 |
Post Options
Thanks(1)
Quote Reply
Posted: May/20/2018 at 9:26pm |
|
At 10psi I would just use a stud with a cometic head gasket
|
|
|
|
|
i6cj7
AMC Apprentice
Joined: Feb/20/2018 Location: virginia Status: Offline Points: 139 |
Post Options
Thanks(0)
Quote Reply
Posted: May/21/2018 at 3:44am |
|
Right on, that's what i was thinking of doing
Edited by i6cj7 - May/21/2018 at 8:42am |
|
|
|
|
ghinmi
AMC Addicted
Joined: Apr/04/2010 Location: Grand Rapids MI Status: Offline Points: 978 |
Post Options
Thanks(0)
Quote Reply
Posted: May/21/2018 at 1:06pm |
|
There's a lot more to it than just a boost number. You can build a 401 that makes 350 hp on 10 psi or one that makes 1000 on 10 psi. Completely different animals and completely different requirements.
|
|
|
1975 Cherokee S - Turbo Hemi stick shift autocross/drag race/street 9.97 @ 140.4
|
|
|
|
|
Aljav
AMC Addicted
Joined: Jul/18/2007 Location: Wisconsin Status: Offline Points: 1037 |
Post Options
Thanks(0)
Quote Reply
Posted: May/21/2018 at 10:17pm |
|
It was explained to me that the reason why AMC had head gasket issues is because the cast iron head is too weak ( water jackets, etc) along the bottom row to properly help seal, thus the need for a extra head bolt. My race motor is 13.5 to 1 Indy heads and cometic gaskets. NO issues with that set up for a couple of years. But the block needs to be decked because the cometic gaskets like a certain type/ clean head surface. I run ARP bolts.
My 2 cents for the day.
|
|
|
69 AMX 9.86 132 mph 71 JAV/AMX and 69 Javelin, .. NAMDRA member #1106
|
|
|
|
|
i6cj7
AMC Apprentice
Joined: Feb/20/2018 Location: virginia Status: Offline Points: 139 |
Post Options
Thanks(0)
Quote Reply
Posted: May/22/2018 at 3:15am |
|
Looking at aluminum heads because one of my iron heads is cracked in a couple places. Doing 9.25 compression, and shooting for 600-ish hp on boost. Trying to keep it reasonable and reliable.
|
|
|
|
|
Red Devil
AMC Addicted
Joined: Jul/10/2007 Location: Canada Status: Offline Points: 1743 |
Post Options
Thanks(0)
Quote Reply
Posted: May/22/2018 at 11:23am |
|
Unless they've changed the casting, Edelbrock heads need sleeved and sealed to add extra head bolts. Indy's heads don't and can be purchased with holes already machined or can machine yourself if so inclined. I machined my Indy SRs and the block and fit extra head bolts on my street engine ... just because extra clamping is seldom a bad thing and only cost was my time.
If starting with fresh heads, the Indy SRs might be a better starting point for a boosted application as they have a better exhaust than Edelbrock, but will need more work as not well finished out of the box. Hope this helps,RD |
|
|
|
|
Post Reply
|
|
Tweet
|
| Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |
Click for TheAMCForum Rules
Topic Options