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 2Likes
04-18-2015, 12:18 PM
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Senior Club Cobra Member
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Join Date: Mar 2002
Location: God's country,
ME
Cobra Make, Engine: Original ERA 427sc, Powered by Gessford
Posts: 2,678
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Not Ranked
Gotcha. Tnx.
__________________
Replica is not a dirty word.
"If you can't be a good example, then you'll just have to be a horrible warning."
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04-18-2015, 12:22 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
If you're looking for a curve like this, you'll need some cubes.... 
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04-18-2015, 03:21 PM
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Senior Club Cobra Member
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Join Date: Mar 2002
Location: God's country,
ME
Cobra Make, Engine: Original ERA 427sc, Powered by Gessford
Posts: 2,678
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Not Ranked
Yes, that would work.
__________________
Replica is not a dirty word.
"If you can't be a good example, then you'll just have to be a horrible warning."
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04-18-2015, 09:13 PM
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CC Member
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Join Date: Feb 2014
Location: White City,
SK
Cobra Make, Engine: West Coast, 460 CID
Posts: 2,908
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Not Ranked
Quote:
Originally Posted by blykins
If you're looking for a curve like this, you'll need some cubes.... |
As the saying goes: "There's no replacement for displacement."
__________________
Brian
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04-19-2015, 05:47 AM
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CC Member
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Join Date: Jun 2001
Location: Mesa,
AZ
Cobra Make, Engine: ERA #2119 289FIA
Posts: 5,380
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Not Ranked
B, what are you thoughts about Dart Pro 1 aluminum heads? Haven't seen any mention of them.
__________________
Karlos
"In the Land of the Pigs, The Butcher is King"
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04-19-2015, 07:05 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
I've never used a set so anything I said would be just an educated guess....
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04-19-2015, 06:04 PM
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CC Member
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Join Date: Apr 1999
Location: cleveland,
OH
Cobra Make, Engine: CSX4000, 427
Posts: 1,999
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Not Ranked
Brent, do you perform any of the machining or porting of the heads in-house?
__________________
"After jumping into an early lead, Miles pitted for no reason. He let the entire field go by before re-entering the race. The crowd was jumping up and down as he stunned the Chevrolet drivers by easily passing the entire field to finish second behind MacDonald's other team Cobra. The Corvette people were completely demoralized."
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04-20-2015, 03:53 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
No sir, I use 2-3 guys who do nothing but carve on heads all day long.  |
04-20-2015, 08:33 AM
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CC Member
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Join Date: Aug 2009
Cobra Make, Engine:
Posts: 105
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Not Ranked
Internal vs. External Balancing
Brent -- I don’t think I missed it in your description of the two engines, I saw it was noted they were Scat cast cranks, but were the rotating assemblies internally or externally balanced? Is internal balancing something you highly recommend if going with a new stroker build anyway, or is it not really worth the expense unless for a build that is going to see some demanding, high RPM operation?
Along the lines of expense, approximately how much does it add to the cost of a build? I have always read that it adds to the cost, but I don’t think I have ever seen a dollar figure stated. I think I saw on the Eagle website where all of their 4340 forged cranks are internally balanced, and obviously more expensive, but wondered if when going with a cast crank, if internal balancing is overkill. Any opinions and dollar figures welcomed.
__________________
If a man does not keep pace with his companions, perhaps it is because he hears a different rumble. Let him step to the sidepipes which he hears, however measured or far away. - H.D. Thoreau...if he had owned a Cobra
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04-20-2015, 08:36 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
Both were 28oz engines.
On a cast crank, it's hard to justify the price to internally balance, but on engines where we are making big horsepower and turning higher rpms, I'll use a steel crank anyway.
Here, it's about $150 to externally balance and then the price to internally balance is the price of the heavy metal and installation. Most internal balance situations are around $350-375.
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04-20-2015, 08:40 AM
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CC Member
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Join Date: Aug 2009
Cobra Make, Engine:
Posts: 105
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Not Ranked
Wow that was quick! Thanks Brent. Great info!
__________________
If a man does not keep pace with his companions, perhaps it is because he hears a different rumble. Let him step to the sidepipes which he hears, however measured or far away. - H.D. Thoreau...if he had owned a Cobra
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04-20-2015, 11:39 AM
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CC Member
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Join Date: Aug 2014
Location: Mill Valley,
CA
Cobra Make, Engine: ERA FIA #2064 BOSS 302 CSX2047 sold
Posts: 181
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Not Ranked
Boss 302
I have a 1970 Boss 302 with the original block, crank, intake manifold and
Cleveland heads. The Crane solid roller cam, Holley 650 double pumper
carb and 10.5/1 pistons are new. MPG port plates are installed for both the
intake and exhaust to smooth out the midrange and the car runs well on the
street with no stumbling. What are the pros and cons with a setup like this
and would better flowing modern heads be a better choice for this engine as
installed in an ERA FIA Cobra?
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