500 lb-ft Small Block in Six Easy Steps - Royal Purple
500 lb-ft Small Block in Six Easy Steps - Royal Purple 500 lb-ft Small Block in Six Easy Steps - Royal Purple
Speed Demon carb 4282010V $299.50 at Summit Milodon claimer pan 31503 $99.95 at Summit Milodon oil-pump drive 23050 $13.95 at Summit Milodon oil pump 18750 $40.39 at Summit Milodon pan baffle 32500 $5.25 at Summit Power Peak HP 338.1 @ 4,400 Peak Torque 444.3 @ 3.400 Average HP 2,500-4,800 292.6S Average Torque 2,500-4,800 424.0 Torque At 2,500 431 lb-ft Above: We wanted torque, so we chose Hedman’s Tork-Step headers in an early Camaro design. The Tork-Step offerings propose to boost bottom end by using small, 1 ½-inch tubing for the first several inches of each pipe, then stepping up to 1 5/8 tubing. Once our 383 made horsepower in the mid-400s, we tried a swap to regular 1 5/8 headers and ended up gaining a few horsepower while losing a few lb-ft of torque. As a result, the Tork-Steps remained on the engine for every dyno test in this story.
Above: While Milodon pans with windage trays have made proven power in our other tests, the HT383’s factory tray seemed to match its performance. We also used a Milodan high-pressure / high-volume pump-which boosted pressure by 20 psi at every rpm point as compared to the stock HT383 pump-and a Milodan hardened oil-pump driveshaft and rear-pan baffle. page 1 2 3 —courtesy, Hot Rod magazine top of page Why Use RP Why Use RP Articles Endorsing RP Independent Testing Videos Unique Performance Advantages Which Oil is Right For You? FAQs Motor Oil FAQs Oil Filter FAQs Marine FAQs Motorcycle FAQs Racing FAQs 2-Cycle Engine FAQs Rotary Engine FAQs Transmission FAQs Purple-Ice FAQs Customer Comments “I am known by my friends to have a good ear when it comes to diagnosing engine problems. I just got done changing the oil in my ’84 Bronco 351w and was getting ready to compare some numbers before and after loading in the Royal Purple. So I fired it up, and listened to it run for 30 seconds and shut it down. Oh my gawd! I am not even going to bother to compare the numbers. I could hear the change in rpm —this stuff is incredible! I cannot believe how a smooth running engine can sound and run better, but mine does after Royal
- Page 1 and 2: Home • Why Use Royal Purple • V
- Page 3: GM recommends a 750 carb for the HT
Speed Demon carb 4282010V $299.50 at Summit<br />
Milodon claimer pan 31503 $99.95 at Summit<br />
Milodon oil-pump drive 23050 $13.95 at Summit<br />
Milodon oil pump 18750 $40.39 at Summit<br />
Milodon pan baffle 32<strong>500</strong> $5.25 at Summit<br />
Power<br />
Peak HP 338.1 @ 4,400<br />
Peak Torque 444.3 @ 3.400<br />
Average HP 2,<strong>500</strong>-4,800 292.6S<br />
Average Torque 2,<strong>500</strong>-4,800 424.0<br />
Torque At 2,<strong>500</strong><br />
431 <strong>lb</strong>-<strong>ft</strong><br />
Above: We wanted torque, so we chose Hedman’s Tork-Step headers <strong>in</strong> an early Camaro design. The<br />
Tork-Step offer<strong>in</strong>gs propose to boost bottom end by us<strong>in</strong>g small, 1 ½-<strong>in</strong>ch tub<strong>in</strong>g for the first several<br />
<strong>in</strong>ches of each pipe, then stepp<strong>in</strong>g up to 1 5/8 tub<strong>in</strong>g. Once our 383 made horsepower <strong>in</strong> the mid-400s,<br />
we tried a swap to regular 1 5/8 headers and ended up ga<strong>in</strong><strong>in</strong>g a few horsepower while los<strong>in</strong>g a few<br />
<strong>lb</strong>-<strong>ft</strong> of torque. As a result, the Tork-<strong>Steps</strong> rema<strong>in</strong>ed on the eng<strong>in</strong>e for every dyno test <strong>in</strong> this story.
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