416 cu in Small Block Stroker 504 HP (#17129)
This engine was built for a rest/cruiser car that had high torque, low maintenance, fun-to-drive car that will eventually end up with fuel injection. The basic engine and components are:
340 LA Block (a 360 block would have equal results)
Edelbrock RPM Heads Prepped by Hughes Engines, inc
Kit Block Preparation
Basic 4.00” Stroker kit with 2308 pistons (final CR 10.1:1)
Main Stud Girdle
Hydraulic Roller cam HER2836AL-106
1.6 ratio rockers
Super Victor Intake Manifold, modified for Fuel injection
830 CFM Barry Grant carb with annular discharge, well modified
1 ¾ “ Dyno headers
1” open carb spacer
This engine had 9.5” vacuum @ 950 RPM and sounded good with a powerful, authoritive idle quality. For a street cruiser, the low RPM torque is very important for quick throttle response and fun driving. This engine had 452 lb/ft torque at 3000 RPM and a maximum of 530 @ 4600 RPM. The HP peaked at 504 @ 5500 RPM. Notice how flat both curves are. This makes a very torquey, easy-to-drive street car.
NOTE: This engine was dyno’d with the Fuel Injection-prepared Super Victor intake manifold with the reworked 830 Demon carb. If this engine was going to use the carb, we would have used a deep port matched Performer RPM intake. This intake would have increased the torque all of the way up in the curve with no loss of top end HP. The engine could have been built with the RHS “X” iron head in a super-prepped configuration for a lower cost and no power loss. Likewise, the hydraulic roller cam could have been replaced with a flat tappet camshaft with no power losses for a lower cost.
Carburetor rework note: The carb was installed out of the box and then reworked to provide the improved power, torque and brake specific curves.
Click on graph below to enlarge
|
EngSpd
RPM
|
STPTrq
Clb-ft |
STPPwr
CHp |
A/F
Ratio |
BSFC
lb/hph |
| 3000 |
452.0 |
258.2 |
11.86 |
0.491 |
| 3100 |
450.6 |
266.0 |
11.95 |
0.476 |
| 3200 |
455.7 |
277.7 |
12.12 |
0.457 |
| 3300 |
462.9 |
290.8 |
12.24 |
0.443 |
| 3400 |
469.5 |
303.9 |
12.58 |
0.427 |
| 3500 |
474.7 |
316.3 |
12.74 |
0.418 |
| 3600 |
482.4 |
330.7 |
12.90 |
0.416 |
| 3700 |
494.7 |
348.5 |
13.13 |
0.407 |
| 3800 |
505.8 |
366.0 |
13.28 |
0.403 |
| 3900 |
518.6 |
385.1 |
13.13 |
0.410 |
| 4000 |
521.3 |
397.0 |
12.84 |
0.420 |
| 4100 |
526.8 |
411.3 |
12.63 |
0.425 |
| 4200 |
523.9 |
418.9 |
12.70 |
0.428 |
| 4300 |
525.0 |
429.8 |
12.56 |
0.436 |
| 4400 |
526.0 |
440.7 |
12.04 |
0.453 |
| 4500 |
524.5 |
449.4 |
12.25 |
0.447 |
| 4600 |
530.2 |
464.4 |
12.71 |
0.431 |
| 4700 |
524.7 |
469.5 |
12.66 |
0.443 |
| 4800 |
523.2 |
478.1 |
12.70 |
0.445 |
| 4900 |
517.7 |
483.0 |
12.71 |
0.451 |
| 5000 |
508.6 |
484.2 |
12.40 |
0.468 |
| 5100 |
506.1 |
491.5 |
12.19 |
0.474 |
| 5200 |
498.1 |
493.1 |
12.04 |
0.488 |
| 5300 |
494.1 |
498.6 |
11.79 |
0.499 |
| 5400 |
487.1 |
500.9 |
12.09 |
0.489 |
| 5500 |
481.6 |
504.4 |
12.09 |
0.490 |
| 5600 |
466.0 |
496.8 |
12.53 |
0.485 |
| 5700 |
459.0 |
498.1 |
12.88 |
0.475 |
| 5800 |
451.0 |
498.0 |
11.68 |
0.526 |
| 5900 |
431.8 |
485.0 |
11.34 |
0.558 |
| 6000 |
416.2 |
475.5 |
11.39 |
0.568 |
| |
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Lumsden Dyno Test #15
Small Block Stroker. 416”C.I. 504HP
This engine was built for a Resto/Cruiser car that would have high torque, low maintenance and be a fun car to drive. This particular engine will end up with I.R. fuel injection. The basic engine and components are:
340 L.A. Block, an L.A. 360 block will have equal results.
Edelbrock L.A. heads with our super prep work on them. P/N 4600P(The RHS X heads would be cast iron substitute with no power loss P/N 20301C)
Basic 4” stroker kit (P/N 340STROKERKIT with 2308 pistons and 2118 rings,
SCAT cast crankand forged rods)Final compression ration 10.1:1 (could have used C.R. to 11:1)
Hydraulic roller cam HER2836ALN 108LSA (228º/236º @ .050”, .544”, .568”, for a flat tappet hydraulic, go to an HEH3237AL-6)
1.6:1 Rockers P/N 1506S-16Super victor intake, modified for F.I. (in a carbureted application a deep port matched RPM intake P/N 5302DPM would work as well) 830 BG carb with annular booster, well modified, good carb choice.Headers 1 ¾” dynoheaders
Carb spacer 1” open P/N
The engine had 9.5” vac @ 950 RPM, and sounded good with a powerful, authoritative idle quality. For a street cruiser, the low RPM torque is very important for quick throttle response and fun driving. This engine had 452 ft/lbs torque @ 3000 and a maximum of 530 ft/lbs @ 4600. The H.P. peaked at 5500 RPM @ 504 H.P. Notice how flat both curves are. This makes a very torquey, easy to drive street car. Spreading the lobe separation will increase the vacuum and mellow out the idle at the expense of some H.P. and torque lose. Note: This engine was dynoed with the FI. prepared super Victor intake manifold with the reworked 830 DEMON carb. If this engine was going to use this carb, we would have used a deep port matched RPM intake. This intake would have increased the torque all the way up in the curve with no loss of top end H.P. The engine could have been built with the RHS”X” iron head in a Super Prepped configuration for a lower cost and no power loss. Likewise, the hydraulic roller cam could have been replaced with a flat tappet of the same size with no power losses for a lower cost.
Carburetor rework note: The carb was installed out of the box and re-worked to provide the improved power, torque and brake specific curves. Look at dyno test #16 to see the difference in power.
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