Help building a High Revving motor
12-23-2005, 01:13 AM
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Help building a High Revving motor My friend wants to build a HIGH revving big block.... what would you guys suggest and what will the redline be in the engine you suggest and where can I find material on building this engine.
Thanks
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12-23-2005, 07:42 PM
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I had a real high revving small block, I am sure you can do the same thing for a big block, I took a 400SB and used a 350SB crank to make 377 c.i. used a custom comp roller cam with AFRs hydra rev kit and it pulled hard to 7,800-8,400. Super victor intake with Holley 850cfm HP series carb.
12-24-2005, 03:22 PM
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A high r bb I'm sure would be lots of fun, I've thought about it many times. I don't know the specs off hand but if you take the crank out of a semi that had a big block they had short strokes and were forged. Last time I looked into it you could build a 360 cu inch bb inexpensively and would be tuff.
12-25-2005, 02:57 PM
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look around at some of the specials for "dynoflo"
i bought a complete short block "set to my specs" 540 dart big m block, eagle 4340 crank, eagle h-beams, series 52 wrist pins, j/e pistons, hell fire rings, fully balanced for $4,100 all new parts no blems!
as far as high rev? it matters what you will be doing with the motor. ( street, strip, tractor pulls) torque is the what you have to control with a big block, so pick your combo to best suite your application.
just my 2 cents
i bought a complete short block "set to my specs" 540 dart big m block, eagle 4340 crank, eagle h-beams, series 52 wrist pins, j/e pistons, hell fire rings, fully balanced for $4,100 all new parts no blems!
as far as high rev? it matters what you will be doing with the motor. ( street, strip, tractor pulls) torque is the what you have to control with a big block, so pick your combo to best suite your application.
just my 2 cents
01-06-2006, 10:28 PM
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Originally Posted by KFK
A high r bb I'm sure would be lots of fun, I've thought about it many times. I don't know the specs off hand but if you take the crank out of a semi that had a big block they had short strokes and were forged. Last time I looked into it you could build a 360 cu inch bb inexpensively and would be tuff.
That being said I have built LOTS of Big Blocks over the years including 1800hp blown alcohol engines.
It all depends on what your friend thinks is "HIGH"...
7500-8000 RPM is do able with a 3.76 stroke steel crank, a good set of rods and a set of light weight forged pistons...
A roller cam along with good valve springs and some good light weight SS valves in a set of rec port heads with a good intake etc...
Now if he is talking 9000+ it's a whole different ball game...
Billet crank, aluminum rods, (or if bucks up...Titanium) light weight premium pistons (Ross, JE, etc) Roller cam + all the goodies that go with it, Titanium valves (heavy valves are the big blocks sore spot)Really good flowing heads (350 cfm +) Stud girdle, 4 bolt block, Great oiling system and pan etc...
Best to have DEEP pockets...
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01-11-2006, 12:53 AM
#8
Mine saw 7300 on the dyno but took it like a champ. It stopped making peak power around 5800, so I don't know why the guy felt the need to check all of my torque specs at that rpm.
It used to be a tall deck 427, but I junked the stock internals (except for the forged crank) and used a 4.25" stroker crank and lightweight rods and pistons. The solid roller probably helped too, although it's kind of small.
7300 sure sounds good, but especially when it's someone elses motor.
It used to be a tall deck 427, but I junked the stock internals (except for the forged crank) and used a 4.25" stroker crank and lightweight rods and pistons. The solid roller probably helped too, although it's kind of small.
7300 sure sounds good, but especially when it's someone elses motor.
01-11-2006, 05:26 PM
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Use a gen v 502 block (4.5" bore), put a 427 (3.75" stroke) crank in it, tunnel ram, solid roller, and some AFR Rect 357 cc heads and let it eat. Good internals are a must, of course. $$$ 470 cube high revving bbc....oh baby
