And now some shots of the new motor I'm building. It's a 421" SBC built on a Dart Little M block.
The block after I painted it:
To handle the power, I ordered it with the billet steel maincaps:
The 4340 crank is forged in the U.S. (Kentucky) for finishing at Howards Cams. I like my stuff bulletproof, so I got the big block snout for extra beefiness to handle the blower drive:
So far, all the measurements on the block, crank and timing gear have been well within spec:
Howards Cams forged billet rods with L19 capscrews:
I had JE make me some custom blower pistons to get the compression ratio I want (9.2:1). They are ceramic coated on top and have the TuffSkirt coating on the barrels:
To handle the airflow, I went with the new AFR 235cc Eliminators. JE had the chamber pattern for these heads and cut the piston dishes to be an exact match:
Shot of the intake port CNC work:
Fully ported Motown single plane that I modifed for EFI. Also cut up a nitrous plate and turned it into a spraybar and embedded it into the manifold. Since I want to keep the stock, flat hood I couldn't afford the stack height of the plate:
Closeup of the porting and spraybar. The spraybar here is only laying there - it needs to be epoxied in place then I'll do a light skim cut across the top of the manifold to make it flush:
And finally the new blower. I'm replacing the current Vortech V-2 T-trim with this V-7 YSi:
I'll be running a Comp solid roller on this motor as well. I picked different intake and exhaust lobes from their catalog. With the 1.7 intake ratio on the T&D shaft rockers, and a 1.8 exhasut ratio, the specs are: 250/[email protected]", net lift .697"Int/.702"Exh, 115LSA. Springs are 700# Pacalloy. After accounting for lash and the rocker ratios, this cam should act like a 244/[email protected]" hydraulic roller but rev safely to 7200rpm.
I'll be running 18-20# of boost with E85. My conservative expectation is 900rwhp without nitrous.
More to come. I'm off to work on fitting the oil pump shaft.
Jim
The block after I painted it:
To handle the power, I ordered it with the billet steel maincaps:
The 4340 crank is forged in the U.S. (Kentucky) for finishing at Howards Cams. I like my stuff bulletproof, so I got the big block snout for extra beefiness to handle the blower drive:
So far, all the measurements on the block, crank and timing gear have been well within spec:
Howards Cams forged billet rods with L19 capscrews:
I had JE make me some custom blower pistons to get the compression ratio I want (9.2:1). They are ceramic coated on top and have the TuffSkirt coating on the barrels:
To handle the airflow, I went with the new AFR 235cc Eliminators. JE had the chamber pattern for these heads and cut the piston dishes to be an exact match:
Shot of the intake port CNC work:
Fully ported Motown single plane that I modifed for EFI. Also cut up a nitrous plate and turned it into a spraybar and embedded it into the manifold. Since I want to keep the stock, flat hood I couldn't afford the stack height of the plate:
Closeup of the porting and spraybar. The spraybar here is only laying there - it needs to be epoxied in place then I'll do a light skim cut across the top of the manifold to make it flush:
And finally the new blower. I'm replacing the current Vortech V-2 T-trim with this V-7 YSi:
I'll be running a Comp solid roller on this motor as well. I picked different intake and exhaust lobes from their catalog. With the 1.7 intake ratio on the T&D shaft rockers, and a 1.8 exhasut ratio, the specs are: 250/[email protected]", net lift .697"Int/.702"Exh, 115LSA. Springs are 700# Pacalloy. After accounting for lash and the rocker ratios, this cam should act like a 244/[email protected]" hydraulic roller but rev safely to 7200rpm.
I'll be running 18-20# of boost with E85. My conservative expectation is 900rwhp without nitrous.
More to come. I'm off to work on fitting the oil pump shaft.
Jim
Nice stuff, when ya gonna send it my way, lol. Hell if ya want you can just send me your old stuff. 
