Fuel Injected Motors:
These motors may or may not use a factory fuel injection system, it will be noted what type of FI system is used on each engine. The engines will be in size order, largest first, followed by smaller sizes.
420 Cubic Inches: L98 motor
Lingenfelter 420, from his book- Modifying Small Block Chevy Engines.
3.875" stroke Callies crank
Oliver 5.875" rods
11: 1 compression, custom forged pistons.
Used a Bowtie engine block
Comp Cams mechanical roller cam: 236/244 @ .050, .549/.549 lift, 110 deg lobe sep, 1.5 roller rocker arms by Comp Cams.
Lingenfelter ported AFR 190 aluminum heads
SuperRam intake, base, and 58mm throttle body, controlled by DFI using 36lb/hr injectors.
Ran test on 1-7/8" open headers.
|
RPM |
TQ |
HP |
| 1600 |
407 |
124 |
| 2000 |
415 |
158 |
| 2500 |
478 |
228 |
| 3000 |
484 |
277 |
| 3500 |
515 |
343 |
| 4000 |
534 |
407 |
| 4500 |
543 |
465 |
| 5000 |
530 |
505 |
| 5500 |
498 |
525 |
| 5750 |
460 |
508 |
As you can see from the numbers above, the motor is a torque monster. The combination of the large displacement, smallish heads, high lift roller cam, and the intake system make big block torque in a small block package. This motor computes out to a 113% efficiency at the HP peak, which is an indication of how well matched this combo is.
420 Cubic Inches: L98 motor
Lingenfelter 420, from Hi Tech Performance May, 1996
3.875" stroke Lunati 4340 forged steel crank
Oliver 5.875" rods
11: 1 compression, JE custom forged pistons.
Used a Bowtie engine block
Lingenfelter hydraulic roller cam: 219/219 @ .050, .525/.525 lift. 112deg lobe sep, Comp Cams 1.6 ratio stainless steel rocker arms.
Lingenfelter CNC ported Brodix Track I heads, 67cc chambers
SuperRam intake, base, and 58mm throttle body, controlled by DFI using 30lb/hr injectors.
Ran test with Accel 1-3/4" headers.
| RPM |
TQ |
HP |
| 2000 |
435 |
165 |
| 2500 |
470 |
225 |
| 3000 |
520 |
300 |
| 3500 |
545 |
365 |
| 4000 |
560 |
420 |
| 4400 |
561 |
480 |
| 5000 |
535 |
502 |
| 5200 |
507 |
509 |
| 5500 |
475 |
490 |
As you can see from the numbers above, the motor is a torque monster. The combination of the large displacement, smallish heads, high lift roller cam, and the intake system make big block torque in a small block package. You can see the differences in the torque and power curves compared to the other 420 motor by Lingenfelter. Even though the engines use the same displacement, intake, and internals; the cam, heads, and injectors are different.
409 Cubic Inches: LT1 motor
TPIS 409, from Hi-Tech Performance March 1997
350 LT1 block, .100 over
Callies 3.875" steel crank
Manley 4340 5.85" steel rods
Ross 11.2:1 pistons
Ported LT1 heads, 2.00/1.56" valves
TPIS Miniram intake, 58mm throttle body, 30lb/hr injectors
TPIS ZZ9 or 409 cam, both tested: 409- 225/225 @ .050, .525/.525 lift, 112deg sep; ZZ9-212/226 @ .050, .483/.520 lift, 112deg sep.
| |
ZZ9 cam |
|
409 cam |
|
| RPM |
TQ |
HP |
TQ |
HP |
| 2000 |
|
|
390 |
148 |
| 2250 |
|
|
451 |
193 |
| 2500 |
|
|
458 |
218 |
| 2750 |
|
|
466 |
244 |
| 3000 |
|
|
484 |
276 |
| 3250 |
490 |
303 |
494 |
306 |
| 3500 |
495 |
330 |
501 |
334 |
| 3750 |
494 |
352 |
500 |
357 |
| 4000 |
494 |
376 |
509 |
388 |
| 4250 |
499 |
403 |
520 |
421 |
| 4500 |
508 |
435 |
526 |
451 |
| 4750 |
506 |
450 |
528 |
477 |
| 5000 |
494 |
470 |
522 |
497 |
| 5250 |
482 |
482 |
518 |
518 |
| 5500 |
461 |
484 |
489 |
512 |
| 5750 |
437 |
478 |
478 |
523 |
| 6000 |
407 |
466 |
454 |
519 |
As you can see from the above numbers, the 409 LT1 produces similar torque to the 420 L98, the only difference being the 4.1" Vs 4.155" bores-11 cubic inches difference. You can also see the difference in the same motor with different cams. Obviously, the 409 cam makes both more torque and horsepower, making it a more efficient combo. This is most probably the largest displacement that you can achieve out of a stock LT1 block.
406 Cubic Inches: L98 motor
Grimes 406, from Hi-Tech Performance December 1995
400 block, four bolt .030 over
Lunati forged 4340 steel crank 3.75"
Lunati Pro Mod 6" steel rods
Wiseco reverse-dome forged pistons
Chevrolet stage 6 heads, ported by Champion Racing, 62cc chambers, 10:1 comp, 2.02/1.60"
TPIS Miniram intake, 58mm throttle body
Lunati custom hydraulic roller cam, 232/232 @ .050, lift unknown, lobe sep unknown
| RPM |
TQ |
HP |
| 3600 |
452 |
310 |
| 3800 |
463 |
335 |
| 4000 |
469 |
357 |
| 4200 |
487 |
389 |
| 4400 |
496 |
416 |
| 4600 |
499 |
437 |
| 4800 |
503 |
460 |
| 5000 |
508 |
483 |
| 5200 |
499 |
494 |
| 5400 |
496 |
510 |
| 5600 |
489 |
521 |
| 5700 |
484 |
525 |
| 5800 |
471 |
520 |
| 5900 |
457 |
514 |
As you can see from the numbers above, the motor is not a torque monster. The combination of the large displacement, large heads, roller cam, and the intake system make good torque in a small block package. Using the Miniram instead of a SuperRam increases top end HP at the expense of torque lower down in the RPMs. Still, this motor is very strong, producing over 500 lbs of torque.
383 Cubic Inches: L98 motor
Lingenfelter 383, from Hot Rod December 1988
350 roller cam block, .030 over
3.75" stroke crank
Speed Pro hypereutectic pistons
Lingenfelter modified plenum and base, large tube runners
Lingenfelter hydraulic roller cam, 210/210 @.050, 525/.525 lift, 112deg lobe sep
Stock Corvette exhaust manifolds, Borla 2-1/4" exhaust
| RPM |
TQ |
HP |
| 1600 |
370 |
113 |
| 2000 |
383 |
146 |
| 2500 |
430 |
205 |
| 3000 |
448 |
256 |
| 3500 |
451 |
300 |
| 4000 |
443 |
338 |
| 4500 |
429 |
368 |
| 4700 |
407 |
364 |
| 5000 |
364 |
347 |
| 5500 |
295 |
310 |
This is a typical Lingenfelter motor, monstrous torque and hp figures larger at lower rpms than almost everyone else. This motor is not a high budget one, but it makes power that other builder's cars can't attain even at 5500 rpm. This motor is all about efficiency.
383 Cubic Inches: L98 motor
Lingenfelter 383, from his book- Modifying Small Block Chevy Engines.
350 block .030 over
Cast 400 crank
Production 5.565" 400 rods
Sealed power forged pistons
Lingenfelter hydraulic roller cam: 219/219 @ .050, .525/.525 lift. 112deg lobe sep, Comp Cams 1.6 ratio stainless steel rocker arms.
Ported aluminum 'Vette heads with 2.00/1.56" valves.
SuperRam intake, base, and 58mm throttle body.
1-3/4" headers were used for the test.
| RPM |
TQ |
HP |
| 1600 |
363 |
110 |
| 2000 |
375 |
143 |
| 2500 |
411 |
196 |
| 3000 |
424 |
242 |
| 3500 |
466 |
310 |
| 4000 |
476 |
362 |
| 4500 |
481 |
412 |
| 5000 |
458 |
436 |
| 5250 |
446 |
442 |
| 5500 |
416 |
435 |
| 6000 |
372 |
425 |
As you can see from the numbers above, this motor is strong on torque. This motor is a replacement for the L98 using the L98 block as a base for increased displacement. This motor computed out to a 110% efficiency at the HP peak, which is outstanding for a street motor.
383 Cubic Inches: LT1 motor
Lingenfelter 383, from his book- Modifying Small Block Chevy Engines.
Lunati 4340 forged steel crank, 3.75" stroke
JE forged pistons
Oliver 4340 steel rods 5.85" length
CNC ported LT1 heads, 2.00/1.56" valves
Lingenfelter hydraulic roller cam: 219/219 @ .050, .525/.525 lift, 112deg sep
SuperRam intake, base, and 52mm throttle body
| RPM |
TQ |
HP |
| 1600 |
362 |
110 |
| 2000 |
364 |
142 |
| 2500 |
372 |
181 |
| 3000 |
403 |
231 |
| 3500 |
452 |
310 |
| 4000 |
468 |
348 |
| 4500 |
452 |
396 |
| 5000 |
437 |
416 |
| 5500 |
413 |
425 |
As you can see from the numbers above, this motor is strong on torque. This motor is a replacement for the LT1 using the LT1 block as a base for increased displacement. This motor computed out to a 100% efficiency at the HP peak, which is very strong for a street motor.
350 Cubic Inches: L98 motor
Traco 350, from Hot Rod February 1989
350 block, stock rods, crank, and pistons 9.5 compression
Corvette aluminum heads, ported by Traco, 2.02/1.60 valves
Traco-Engle hydraulic roller cam; 218/218 @.050, .534/.534 lift, 114deg lobe sep
1.6 roller rockers
Modified TPI intake and plenum, large tube runners
1-5/8" headers
| RPM |
TQ |
HP |
| 2000 |
355 |
135 |
| 2500 |
380 |
185 |
| 3000 |
400 |
230 |
| 3500 |
410 |
270 |
| 4000 |
419 |
315 |
| 4500 |
400 |
345 |
| 4800 |
380 |
358 |
| 5200 |
355 |
345 |
This is obviously not a high rpm motor, as the power peak is at only 4800 rpm. But the engine makes a tremendous amout of torque for a 350. It would be a good strip motor because the torque starts at low rpms, and makes more than one hp/ci at only 4800 rpm, this motor is super efficient with the rpms that it operates in.
