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  #81  
Old 10-22-2021, 02:20 AM
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Yeah, my bad! Fat fingered into the wrong thread!

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  #82  
Old 10-22-2021, 02:24 AM
Vckline313 Vckline313 is offline
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Yeah, my bad! Fat fingered into the wrong thread!
It happens

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  #83  
Old 10-25-2021, 09:11 AM
Vckline313 Vckline313 is offline
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I personally believe you have a tuning issue… has your HEI been worked to adjust the advance curve…

Also what about ignition setting at idle… as far as heads the 5C heads are actually really good so IMO until you can upgrade to Edelbrock
What would you or anyone else reccomend me being "all in" at? I bought a msd distributor recurve kit I will be playing with soon
I have vaccum advance plugged into manifold vaccum now as well

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  #84  
Old 10-25-2021, 09:42 AM
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It was ask for a couple of time but I don't see that a Cranking Compression Test was ever done on this engine.

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No none has been done

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Why not?

Stan

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  #85  
Old 10-25-2021, 10:01 AM
Vckline313 Vckline313 is offline
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Why not?



Stan
Haven't bought the tool to do it

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  #86  
Old 11-14-2021, 09:20 PM
Vckline313 Vckline313 is offline
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Ended up finding the original owner of my car on Facebook. He said car has a ram air III cam, car was bored over 60 over balanced and blue printed he said the heads were worked but dosnt remember the specifics and compression was 9.5 or 10 to 1

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  #87  
Old 11-14-2021, 10:12 PM
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" Haven't bought the tool to do it " $14 bucks too much ?

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  #88  
Old 11-15-2021, 08:50 AM
Vckline313 Vckline313 is offline
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" Haven't bought the tool to do it " $14 bucks too much ?
Correct

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  #89  
Old 11-15-2021, 02:23 PM
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" Haven't bought the tool to do it " $14 bucks too much ?
$10 on sale and you might be able to wrap your cast iron heads in aluminum foil with the $4 you have left over.

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  #90  
Old 11-15-2021, 11:11 PM
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Ended up finding the original owner of my car on Facebook. He said car has a ram air III cam, car was bored over 60 over balanced and blue printed he said the heads were worked but dosnt remember the specifics and compression was 9.5 or 10 to 1

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Rough idle with a RA 3 sounds like it describes a 744 cam.

If this is correct the aluminum heads won’t gain much with out a cam change too. RA3 744 cam only has .406” lift. The bigger ports on Aluminum heads just start to get going at .4” lift.

To get a 400 with 5C to 9.5-10 compression would either take some domed pistons or start out with small chamber 5c’s with a lot of milling to get the cc’s down. Both are possible, but I would be surprise if the compression is that high. By the way the performance is described it is more likely the compression is low 8s and the 744 cam. Fwiw

Last edited by Jay S; 11-15-2021 at 11:36 PM.
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