Edelbrock heads.

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60779's on my son's 340. Same head, just with different springs for flat tappet, versus the 60775 which had springs for rollers.
Problems? Questions?
 
Ed. 60179s on my 340. With iron X heads it was pinging, even on 93 octane gas with the timing retarded. Put these heads on, it runs smoother, cooler, and no more pinging even with the timing advanced to where it should be.
 
69_340_GTS said:
Ed. 60179s on my 340. With iron X heads it was pinging, even on 93 octane gas with the timing retarded. Put these heads on, it runs smoother, cooler, and no more pinging even with the timing advanced to where it should be.
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So the theory is proven in your case .... good to hear a real experience. Do you know your static and dynamic CR's by any chance?
 
nm9stheham said:
So the theory is proven in your case .... good to hear a real experience. Do you know your static and dynamic CR's by any chance?
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Should be about 10.0:1 but I don't know for sure. This is just going off the calculator at Summit Racing. (rebuilt with flat-top "stock" 340-type .060" oversize pistons)
 
nm9stheham said:
So the theory is proven in your case .... good to hear a real experience. Do you know your static and dynamic CR's by any chance?
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What theory is proved ?
The edelbrocks and pro comps are less cc's resulting in higher cr witch will help pinging ?
 
jimmer said:
What theory is proved ?
The edelbrocks and pro comps are less cc's resulting in higher cr witch will help pinging ?
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That the better heat conductivity and thus cooler surfaces of AL heads reduce the tendency for pinging/detonation. He got rid of his pinging with AL heads despite going to higher CR and advancing timing too...higher CR and advanced timing tend to increase the tendency to detonate.

Oh wait, I see. When you say 'helps' you mean 'reduces'; I thought you meant 'increases'..... I was really confused LOL. The coffee has not kicked in yet!
 
nm9stheham said:
That the better heat conductivity and thus cooler surfaces of AL heads reduce the tendency for pinging/detonation. He got rid of his pinging with AL heads despite going to higher CR and advancing timing too...higher CR and advanced timing tend to increase the tendency to detonate.

Oh wait, I see. When you say 'helps' you mean 'reduces'; I thought you meant 'increases'..... I was really confused LOL. The coffee has not kicked in yet!
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It's all good !!
Drinking my coffee now .
Coffee is pretty cool !!
Kinda like our race gas so we don't dentonate !!!
Have a great day !!
Jim
 
nm9stheham said:
That the better heat conductivity and thus cooler surfaces of AL heads reduce the tendency for pinging/detonation. He got rid of his pinging with AL heads despite going to higher CR and advancing timing too...higher CR and advanced timing tend to increase the tendency to detonate.

Oh wait, I see. When you say 'helps' you mean 'reduces'; I thought you meant 'increases'..... I was really confused LOL. The coffee has not kicked in yet!
Click to expand...

I don't think I would discount a better combustion chamber shape rather that the material the head is made from.
 
Thats true. The open chambered design of the OE head vs. the closed chambered design of the aluminum head is just a bit different.
 
That's exactly what I did when the Edelbrock head was pretty new. My 360 was at zero deck with 2.02 J heads and a purple 292. I made the move to the Edelbrock heads. A very nice improvement for sure.
 
rumblefish360 said:
That's exactly what I did when the Edelbrock head was pretty new. My 360 was at zero deck with 2.02 J heads and a purple 292. I made the move to the Edelbrock heads. A very nice improvement for sure.
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I have pretty much the same thing on my 72 340 4speed Cuda.
I sent them to IQ52 and had Jim,
And Cody do their majic !!
Very pleased !!!
Jim
 
jimmer said:
I have pretty much the same thing on my 72 340 4speed Cuda.
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Same car here really.
'73/360/4spd-4.10's
The bottom end improved and the top end screamed. Then came the move from a Torker II to the RPM/AG. It got even better. Much more bottom end and about the same top end. Slightly better in its feel. The car ran smoother through the range.

I am running the 60779, regular heads/spring set up. The increased spring rate on the "775" head should be just fine, just check the head out and make sure the springs fall into the proper rates for your cam.
 
I thought those 60775s were 65cc chambers. I see in the catalog now, that they are listed at 63cc.I never measured mine.
If that's true then my Scr just went to 10.85, and the Dcr jumped to 8.54. Wallace says 173 psi. I'm still running 87E10,lol
 
rumblefish360 said:
Same car here really.
'73/360/4spd-4.10's
The bottom end improved and the top end screamed. Then came the move from a Torker II to the RPM/AG. It got even better. Much more bottom end and about the same top end. Slightly better in its feel. The car ran smoother through the range.

I am running the 60779, regular heads/spring set up. The increased spring rate on the "775" head should be just fine, just check the head out and make sure the springs fall into the proper rates for your cam.
Click to expand...
I'm not sure how to post YouTube
Links ?
But if you go to you tube and search mrjimmymcadams all one word there is a video of the car the day after break in .
Jim
 
Has anyone had these heads ported for a decent price? Who and location? Flow numbers?
 
My head guy did a hand porting and acco. valve job/back cut etc...
$1,000.
298cfm on his bench. IIRC, @ .600.
 
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