VITAL SPECIFICATIONS:
DAVID KAUFFUNG
305 SMALL-BLOCK CHEVY
Bore: 3.736 inches
Stroke: 3.48 inches
CID: 305 ci
Compression ratio: 10.3:1
Camshaft: COMP solid flat-tappet
Cam duration: 229/238 degrees at .050 inch tappet rise
Cam lobe lift: 329/.335 inch
Rocker arms: PRW
Rocker ratio: 1.65:1

Lobe separation: 112 degrees
Installed centerline: 107 degrees
Top ring: Speed-Pro 5/64-inch moly
Top ring gap: .022 inch
Second ring: Speed-Pro taper-face
5/64-inch iron
Second ring gap: .018 inch
Oil ring: Speed-Pro
Piston: Federal Mogul hypereutectic flat-top
Block: production GM
Crankshaft: stock GM 305
Rods: stock GM 305, 5.7 inch
Main bearing clearance: .0025 inch
Rod bearing clearance: .002 inch  
Cylinder heads: GM Fast Burn No. 12464298
Peak intake flow: 265 cfm
Intake valve diameter: 2.00 inch
Exhaust valve diameter: 1.55 inch
Intake manifold: GM Vortec Eliminator
Carburetor: 800-cfm Quadrajet
Header: Hedman
Ignition: MSD
Distributor: Pro Comp
Damper: stock GM 8-inch
Water pump: Jegs

ON THE DYNO
DTS
ENGINE
DYNO
TESTED AT UNIVERSITY OF NORTHWESTERN
OHIO
RPM TQ HP
2,600 298 147
2,800 309 165
3,000 316 181
3,200 321 195
3,400 319 207
3,600 317 218
3,800 331 239
4,000 346 263
4,200 354 283
4,400 357 299
4,600 360 315
4,800 363 332
5,000 364 346
5,200 361 358
5,400 356 366
5,600 351 374
5,800 345 381
6,000 340 389
6,200 333 393
6,300 328 394
6,400 312 393