I plan on using motowns new block a callies crank, oliver rods and j and e pistons now help me pick a set of wicked heads and a cam to match im looking for 600 horse na then adding some nitrous and money is no issue DavidW.

 

you don't want much. I guess you want your 600hp to be a daily driver and run on pump gas.

1.5 hp per cube is not too easy.
I suggest you start with a set of AFR220s, Vic JRs, or TFS23s for aluminum. Iron Lightening for cast iron. Send them somewhere and have someone flow them and give them a basic cleanup. Shoot for 300cfm at 600" lift. Once you have the heads done, call cam motion and tell them your complete buildup (gearing and vehicle weight). They will grind you a solid roller that will make 600. Trouble is, a motor that will also be setup for NOS really won't have a good cam design when not on the spray. The LSA on NOS motors should be much wider than it would normally be to make good hp na (which is about 106 to 110 degrees).

You could even go with 18degree heads. They start about 2000.



[This message has been edited by jcb999 (edited July 15, 2001).]

 

I put a SBC 427 in my 82 Corvette this past spring. I used the Dart Iron Eagle block, it's the same as the GM 'Rocket Block'. Dart actually makes the Rocket Block for GM.

Anyway, I used Dart 18* CNC ported heads that flow up to 355 cfm at .700", but even the low valve lift numbers exceed the majority of 23* heads. Cylinder heads make power, and on a big small block, you need a good set of heads to let all of those ci's breath. Also, don't be afraid of larger intake port volumes. That many ci's and that long of a stroke are plenty to pull the intake charge.

I ended up making 650hp at 6700rpm, basically 1.5 hp/ci, but it idles like a sewing machine at 850 rpm and runs on straight 92 octane with no detonation or overheating. Most impresseive, to me at least, is that is makes over 500ft lbs from 3000 to 7000 rpms, that's a fat and flat torque curve. It peaks at 580 ft lbs at 5100rpm

Like Jcb999 mentioned, it ain't easy, but the heads make the difference. My engine cost me about $25,000, but it coulda been done cheaper. I used the best parts available, like an all Jesel valve train. The lifters were $220 each (times 8) the oil pump was $650, the Jesel belt drive was $1000, the crank was $2500, etc. The intake manifold was $2500.

If you dont want to deal with 18* heads, the Dart 215 heads as well as the AFR 215 raised runner heads make good power, and flow around 310cfm.

I had 4 custom solid roller cams made for my motor by Comp cams. I tried them all on the dyno get the best combo of power, torque, idle, etc. I ended up going with a 256/264 Comp solid roller, using their High torque .406" lobes. With 1.7/1.6 Jesel shaft rockers, it makes .690"/.650" lift at the valve. It's on a 112LSA, installed at 110 ICA.

If you're interested, I don't mind sharing anything I learned from building this motor. I was very meticulous in detailing it all on my website. I also have all the dyno printouts from the different cams, differnt vlave timing/valve lash, A/F, etc.

Good luck with your motor, it sounds like your planning on building a nice one.

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1982 Corvette Tremec TKO
<A HREF="http://www.geocities.com/monty_williams/434specifications.html" TARGET=_blank>SBC 427 650hp/580tq
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