ON THE DYNO
'70 LT-1 vs. '96 LT1
LT-1 LT1
RPM HP TQ HP TQ
3,000 208 364 209 367
3,200 221 363 225 374
3,400 243 375 242 377
3,600 265 386 258 379
3,800 283 391 274 379
4,000 298 391 288 379
4,200 312 391 302 378
4,400 323 386 316 377
4,600 333 381 330 376
4,800 341 373 336 368
5,000 347 364 341 358
5,200 351 354 344 347
5,400 353 343 346 337
5,600 353 331 347 326
5,800 350 317 345 313
6,000 348 305 346 303

Despite the short runners used in the LT1 EFI intake, the late-model motor offered more low-speed torque than the '70 version. Some of this is due to the dramatic difference in cam timing, as the milder hydraulic roller in the LT1 no doubt improved low-speed (below 3,300 rpm) torque production. From 3,500 rpm to 6,000 rpm, the original LT-1 offered slightly more power. The peak hp numbers were nearly identical, with the original version pumping out 353 hp, and the later mill making an even 350 hp. In the torque department, the '70 LT-1 produced 392 lb-ft at 4,100 rpm, compared with 379 lb-ft at 3,800 rpm for the LT1. In the midrange, the high-compression LT-1 offered as much as 13 extra lb-ft, but the difference was just 2 hp at 6,000 rpm.

SOURCE
Comp Cams Inc.
3406 Democrat Road
Memphis
TN  38118
800-999-0853
www.compcams.com
Pro Comp Electronics
605 S Milliken Avenue
Unit A
Ontario
CA  91761
909-605-1123
www.procompelectronics.com
Holley/Hooker
1801 Russellville Road
Bowling Green
KY  42101
270-782-2900
www.holley.com
L&R Automotive
13731 Bora Drive
Sante Fe Springs
CA  90670
562-802-0443
www.lnrengine.com
Demon Engines
Sante Fe Springs
CA
562-694-2559
www.demonengines.com