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  #61  
Old 07-24-2018, 02:49 PM
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Sounds like he moved the guides.
There the new castings with moved spark plug locations and LS chamber.. I think they come with the valves moved ..

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  #62  
Old 07-24-2018, 02:54 PM
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My E-head 2.28 /1.71 valves
Sounds like you have the older castings before his with out the LS chamber..

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  #63  
Old 07-24-2018, 02:59 PM
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There the new castings with moved spark plug locations and LS chamber.. I think they come with the valves moved ..
Interesting, i didn't know Edelbrock moved the valves on those heads. So i assume they need a new shaft rocker system so rockers/valves stay in alignment?

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  #64  
Old 07-24-2018, 03:17 PM
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Interesting, i didn't know Edelbrock moved the valves on those heads. So i assume they need a new shaft rocker system so rockers/valves stay in alignment?
Lol , there not moved enough to need a new rocker shaft. Come on man you knew that ....

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  #65  
Old 07-24-2018, 03:45 PM
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Lol , there not moved enough to need a new rocker shaft. Come on man you knew that ....
I would think you would want the valve tip lined up with the center of the roller tip on the rocker?
I had no idea the valves were moved or how much they were moved. Any info what was moved (intake or exhaust or both) and how much?

Sorry for the hijack

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  #66  
Old 07-24-2018, 04:36 PM
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I would think you would want the valve tip lined up with the center of the roller tip on the rocker?
I had no idea the valves were moved or how much they were moved. Any info what was moved (intake or exhaust or both) and how much?

Sorry for the hijack
You're asking me questions you should be asking Edlebrock. Not enough to cause alignment problems for the rocker shaft i know that ..


I thought you were questioning the fact that they flow 20 CFM across the board better then drags heads ? Whats with all the other questioning? If you call Edlebrock they will give you all the info you're asking me...

I tell you what . Dave does good work . I saw them up close!

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  #67  
Old 07-24-2018, 04:43 PM
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Ok.... ill bite.

The exhaust valve was moved 0.060-inch farther away from the intake valve, which resides in the stock loacationThe spread allows for the installation of a oversided intake valve. This was done in 2012 , you should know this stuff !

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  #68  
Old 07-24-2018, 05:49 PM
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Ok.... ill bite.

The exhaust valve was moved 0.060-inch farther away from the intake valve, which resides in the stock loacationThe spread allows for the installation of a oversided intake valve. This was done in 2012 , you should know this stuff !
Why should i know it? Edelbrock never mentioned it that im aware of and it's never been discussed here that i know of (if it has what thread? Not finding anything by searching). I will look into it.

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  #69  
Old 07-24-2018, 06:54 PM
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Why should i know it? Edelbrock never mentioned it that im aware of and it's never been discussed here that i know of (if it has what thread? Not finding anything by searching). I will look into it.
I got what i told you from there site because you asked me. I just looked for you.. lol

Its right there for anyone inclinde to inquire about there head.

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Old 07-24-2018, 07:12 PM
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stock valve to valve center is 1.96". edl heads are 2.02" iirc. part of the study i did long ago. exh valve moved out .060"

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  #71  
Old 07-24-2018, 07:13 PM
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I got what i told you from there site because you asked me. I just looked for you.. lol

Its right there for anyone inclinde to inquire about there head.
Where does it say they moved the exhaust .060 in 2012?
It states the spacing is 2.030. So there is .020 between the valve sizes you listed. Thanks for the info, appreciate your help.

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  #72  
Old 07-24-2018, 07:15 PM
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stock valve to valve center is 1.96". edl heads are 2.02" iirc. part of the study i did long ago. exh valve moved out .060"
Good info. Thanks

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  #73  
Old 07-24-2018, 07:22 PM
BruceWilkie BruceWilkie is offline
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4.00" stroke, 4.250" bore for a centrifugal. It all depends on what you want and when you want it. Let the blower do the work not the engine.

A turbo is different and is not a simple answer. Need to do more math...lol
Just more math ☺️
Funny I get made fun of (by internet experts with no turbo or centrifugal experience)when I suggest that bore stroke being ideal for our Pontiacs.(actually 4.255 bore is better cause then it's a 455 lol). Besides better cyllinder seal it's less side loading without excessive peak piston speed. NA go ahead with bigger bore. Still personally would like to use rpm to replace stroke NA but to each his own I guess.

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  #74  
Old 07-24-2018, 07:23 PM
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Where does it say they moved the exhaust .060 in 2012?
It states the spacing is 2.030. So there is .020 between the valve sizes you listed. Thanks for the info, appreciate your help.
Read this article ..... https://www.hotrod.com/articles/an-e...r-pontiac-v-8/

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  #75  
Old 07-24-2018, 08:12 PM
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That article is talking about the ex being moved .060 based on the original head that came out in the mid 90's. Jim is 100% correct with is post (stock is 1.96 e-head was 2.02, .060 move). So now the question is did edelbrock move the ex an additional .010 with the redesigned chamber or is that 2.030 a typo on their website. Again thx for the info you shared. And again sorry to 69Goat1 for the hijack

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  #76  
Old 07-24-2018, 08:29 PM
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Originally Posted by slowbird View Post
That article is talking about the ex being moved .060 based on the original head that came out in the mid 90's. Jim is 100% correct with is post (stock is 1.96 e-head was 2.02, .060 move). So now the question is did edelbrock move the ex an additional .010 with the redesigned chamber or is that 2.030 a typo on their website. Again thx for the info you shared. And again sorry to 69Goat1 for the hijack
You're saying Jim is right like im wrong. He said noting different then i said..

Point is they flow 20CFM better , I say you seem to be questioning . That which has nothing to do with if or how much the valve was moved and it needing a different rocker shaft when it doesnt...

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  #77  
Old 07-24-2018, 09:00 PM
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You're saying Jim is right like im wrong. He said noting different then i said..

Point is they flow 20CFM better , I say you seem to be questioning . That which has nothing to do with if or how much the valve was moved and it needing a different rocker shaft when it doesnt...
Does it bother you if i believe or not?
I just asked some questions, i keep forgetting that is a no no. Lol

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  #78  
Old 07-24-2018, 09:06 PM
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Does it bother you if i believe or not?
I just asked some questions, i keep forgetting that is a no no. Lol
It dont bother me at all. But you should believe because its true.

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  #79  
Old 07-24-2018, 09:10 PM
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It dont bother me at all. But you should believe because its true.
Ok.

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  #80  
Old 07-24-2018, 09:18 PM
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charlie and brian are both right, imo- jeez-
back to the blower build

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