tall deck 427 stroker build help...
Angry70chevy
03-14-2009, 02:17 PM
so I'm relativly new to restoring cars and I own a 1970 chevy nova that came with a big block 396. the origional engine was blown a long time ago and it currently has another 396 out of a chevelle in it. just this week I bought a tall deck big block 427 that I beleive came out of a truck (1970-1980) I have to get it magnafluxed to check for cracks but once thats done I was wondering:
-what the best combo of parts would be to get the new 427 to the 500+ hp and 500+ torque? it came with nothing low performance heads and cam. the pistons arent in that great of shape, but I might be able to reuse the rods and steel crank.
basically I wanna make a big cubic inch stroker out of this engine. prolly bore it .060 over so I'd need new pistons, heads, cam, wide intake b/c its a tall deck, and carb. what you guys think will be the best combo of parts?
I was thinking edelbrock top end kit (540hp for big blocks) , with a merlin X intake, a 4500 dominator carb, but i dont know what pistons and other things would be good. any suggestions would be greatly appreciated
-mike
-what the best combo of parts would be to get the new 427 to the 500+ hp and 500+ torque? it came with nothing low performance heads and cam. the pistons arent in that great of shape, but I might be able to reuse the rods and steel crank.
basically I wanna make a big cubic inch stroker out of this engine. prolly bore it .060 over so I'd need new pistons, heads, cam, wide intake b/c its a tall deck, and carb. what you guys think will be the best combo of parts?
I was thinking edelbrock top end kit (540hp for big blocks) , with a merlin X intake, a 4500 dominator carb, but i dont know what pistons and other things would be good. any suggestions would be greatly appreciated
-mike
MrPbody
03-17-2009, 09:13 AM
The "tall" deck block is an excellent place "to start". One of the "weak links" in BBC is the relatively short connecting rod. Using the taller deck allows the use of a longer rod. Both longevity and rev "capability" are vastly improved.
You can't reuse the pistons, as they are for "HD" truck use. They are much heavier and longer than a good performance piston, and have an "extra" compression ring. Not suitable for performance use.
Eagle Specialty Products supplies a very nice rotating assembly to make the 427 a "496". That's a 4.25" stroke, bored .060", and includes those "long" (6.800" versus 6.135" stock) rods.
Avoid the "cast steel" cranks for a stroker of this level. Nothing but grief. The forged crank is the way to go.
The Edelbrock heads are fine, but like any other, they're not REALLY "ready to run", even though they are billed as such. At CVMS, we get them "bare" and supply superior hardware. When a customer supplies their own or insists on the "out of the box" head, we always disassemble them and clean up the transitions (where their CNC work ends and "as cast" begins).
Cams are the "brain" of an engine, and need to be carefully selected to make the most (optimize) of a given combination. NONE of the cams supplied by Edelbrock fit that description. They are all fairly old "generi-grinds", not taking advantage of modern cam grinding techniques.
Your power goals are a "slam dunk" with this engine combination. 93 octane friendly and more torque than you'll know what to do with!
Jim
You can't reuse the pistons, as they are for "HD" truck use. They are much heavier and longer than a good performance piston, and have an "extra" compression ring. Not suitable for performance use.
Eagle Specialty Products supplies a very nice rotating assembly to make the 427 a "496". That's a 4.25" stroke, bored .060", and includes those "long" (6.800" versus 6.135" stock) rods.
Avoid the "cast steel" cranks for a stroker of this level. Nothing but grief. The forged crank is the way to go.
The Edelbrock heads are fine, but like any other, they're not REALLY "ready to run", even though they are billed as such. At CVMS, we get them "bare" and supply superior hardware. When a customer supplies their own or insists on the "out of the box" head, we always disassemble them and clean up the transitions (where their CNC work ends and "as cast" begins).
Cams are the "brain" of an engine, and need to be carefully selected to make the most (optimize) of a given combination. NONE of the cams supplied by Edelbrock fit that description. They are all fairly old "generi-grinds", not taking advantage of modern cam grinding techniques.
Your power goals are a "slam dunk" with this engine combination. 93 octane friendly and more torque than you'll know what to do with!
Jim
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