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How to Build New Hemi Performance on the Dyno: Optimal Parts Combos for Max Horsepower
Select the right performance parts to get the most power out of your Hemi engine with guidance from veteran author and dyno-testing expert Richard Holdener.
Fitted with the right high-performance parts, these powerful engines can produce far more horsepower and torque than stock. Selecting the ideal parts for the engine and application is essential. Richard has done the research, gathered the data, and provided a detailed analysis of the results. Within the pages of How to Build New Hemi Performance on the Dyno: Optimal Parts Combos for Max Horsepower, heads and camshafts, headers and exhaust, intakes, throttle bodies, manifolds, electronic engine controls, forced-air induction, and nitrous oxide are all tested. Using this comprehensive information and the dyno results, you can select the best performance parts for your engine and application. Each test provides a thorough description of the parts, test engine, and testing conditions, plus evaluation and insight into the results. Tests from budget to high-end engine builds are conducted to fit a wide spectrum of applications, so you can apply the testing data and results to your specific build project. Horsepower and torque graphs illustrate dyno test results for clear comparisons. In turn, it takes all the guesswork out of selecting parts, which saves you time and money.
The word Hemi conjures up visions of racing and street domination. Widely regarded as one of the greatest American V-8s ever produced, Chrysler released its third-generation version of the engine in 2003 and installed it in a wide range of Chrysler cars and trucks. Through the years, the 5.7, 6.1, 6.2 Hellcat, and 6.4 Hemi engines have established an impressive high-performance reputation that builds on the proud heritage of the engine family. Most stock Hemi engines produce an impressive one horsepower per cubic inch, but they can make substantially more torque and horsepower for specific applications.
Although the New Hemi produces excellent performance in stock form, it’s just the starting point. With the right parts, you can build the most potent street, street/strip, or full-race engine. Whether you’re building a mild street Hemi, a race engine, or something in between, this book is a valuable resource.
Select the right performance parts to get the most power out of your Hemi engine with guidance from veteran author and dyno-testing expert Richard Holdener.
Fitted with the right high-performance parts, these powerful engines can produce far more horsepower and torque than stock. Selecting the ideal parts for the engine and application is essential. Richard has done the research, gathered the data, and provided a detailed analysis of the results. Within the pages of How to Build New Hemi Performance on the Dyno: Optimal Parts Combos for Max Horsepower, heads and camshafts, headers and exhaust, intakes, throttle bodies, manifolds, electronic engine controls, forced-air induction, and nitrous oxide are all tested. Using this comprehensive information and the dyno results, you can select the best performance parts for your engine and application. Each test provides a thorough description of the parts, test engine, and testing conditions, plus evaluation and insight into the results. Tests from budget to high-end engine builds are conducted to fit a wide spectrum of applications, so you can apply the testing data and results to your specific build project. Horsepower and torque graphs illustrate dyno test results for clear comparisons. In turn, it takes all the guesswork out of selecting parts, which saves you time and money.
The word Hemi conjures up visions of racing and street domination. Widely regarded as one of the greatest American V-8s ever produced, Chrysler released its third-generation version of the engine in 2003 and installed it in a wide range of Chrysler cars and trucks. Through the years, the 5.7, 6.1, 6.2 Hellcat, and 6.4 Hemi engines have established an impressive high-performance reputation that builds on the proud heritage of the engine family. Most stock Hemi engines produce an impressive one horsepower per cubic inch, but they can make substantially more torque and horsepower for specific applications.
Although the New Hemi produces excellent performance in stock form, it’s just the starting point. With the right parts, you can build the most potent street, street/strip, or full-race engine. Whether you’re building a mild street Hemi, a race engine, or something in between, this book is a valuable resource.
Introduction
Chapter 1: Intake Manifolds
Test 1: Truck vs Mopar Performance Single-Plane Intake for a 5.7L Stroker
Test 2: Stock Truck vs Stock Magnum Intake for a 5.7L Stroker
Test 3: Stock vs Kenne Bell Throttle Body Test on a KB Supercharged 6.1L
Test 4: Stock SRT8 vs Mopar Performance Single Plane for a 5.7L Crate Hemi
Test 5: Stock SRT8 vs Wilson Billet Intake for a Modified 6.1L
Test 6: Single-Plane vs Edelbrock Dual-Quad Intake for a Modified 5.7L
Test 7: Mopar Performance Single Plane vs Speedmaster Downdraft IR Intake for a Mild 5.7L Hemi
Test 8: Effect of Runner Length of a Speedmaster Downdraft IR for a Mild 5.7L Hemi
Chapter 2: Cylinder Heads
Test 1: Stock vs Ported 5.7L Heads on a Stock 5.7L Hemi
Test 2: Stock 5.7L vs TEA Heads on a Modified 5.7L Hemi
Test 3: Stock 5.7L vs Ported 6.1L Heads on a Mild 5.7L
Test 4: Stock vs CNC Ported Heads on a 5.7L Stroker
Test 5: Stock vs Ported 6.1L Heads on a 426 Stroker Hemi
Test 6: Stock vs Milled 6.1L Heads on a Modified 6.1L
Test 7: Stock vs Milled 6.1L Heads on a Supercharged 6.1L
Test 8: Stock 5.7L vs Edelbrock RPM Heads on a Modified 6.1L
Chapter 3: Camshafts
Test 1: Stock vs Comp 273 Cam Test in a 5.7L Hemi
Test 2: Small vs Big Cam Test in a 5.7L Stroker
Test 3: 260H vs 268H Comp Cam Test in a Mild 5.7L Hemi
Test 4: 260 vs 273 Comp Cam Test in a Mild 5.7L Hemi
Test 5: Stock vs Comp 260H Cam Test in a Mild 5.7L Hemi
Test 6: Comp Cams 273H vs Custom Cam in a Modified 6.1L Hemi
Test 7: Comp 273H vs Blower Cam in a Supercharged 6.1L Hemi
Test 8: Stock vs Comp 260H Cam Test for a Turbo 5.7L
Chapter 4: Headers and Exhaust System
Test 1: Stock Exhaust Manifolds vs Long-Tube Headers on a 5.7L Hemi
Test 2: Exhaust Manifolds vs Long-Tube Headers (KB SC 6.1L)
Test 3: Shorty vs Long-Tube Headers on a Mild 5.7L Hemi
Test 4: Shorty vs Long-Tube Headers on an IR 5.7L Hemi
Test 5: 1¾-inch vs 17⁄8-inch 5.7L Hemi Headers
Test 6: Effect of Header Collector Length on a 5.7L Hemi
Test 7: Stock Manifolds vs 1¾-inch Headers on a Modified 5.7L Hemi
Test 8: Truck vs SRT8 Manifolds for a Stock 5.7L Hemi
Chapter 5: Supercharging
Test 1: NA vs Paxton on a Modified 5.7L Crate Engine
Test 2: NA vs Kenne Bell Supercharger on a 6.4L Challenger
Test 3: NA vs TorqStorm with 9.9 psi on a Modified 5.7L Hemi
Test 4: NA vs Procharger D1SC (9.6 psi) on a 5.7L Hem
Test 5: NA 6.1L SRT8 vs Vortech V3 (8.9 psi)
Test 6: Effect of Boost 19 vs 22 vs 24 psi (KB SC 6.1L)
Test 7: NA 6.1L Hemi vs Magnuson TVS2300 (6.0 psi)
Chapter 6: Turbocharging
Test 1: NA 370-ci (5.7L) Stroker vs Turbo (10 psi)
Test 2: 5.7L Hemi: NA vs Single Turbo with 8.1 and 10.4 psi of Boost
Test 3: 76-mm Turbo Test: CXRacing vs Precision on a 370 Stroker
Test 4: 6.1L Hemi-Effect of Boost (7 vs 11 psi)
Test 5: 6.1L Hemi Stroker-Gains from Boost (9 vs 11 psi)
Test 6: NA vs Low Buck Turbos 7.3 and 13.3 psi on a 6.1L Hemi
Test 7: NA vs High Boost on a Modified 5.7L Hemi
Chapter 7: Nitrous Oxide
Test 1: NA vs Zex Nitrous (75 hp) on a Modified 6.1L
Test 2: NA Modified 5.7L vs NOS Nitrous (125-hp Shot)
Test 3: NA 6.1L Hemi Stroker vs Nitrous (175-hp Shot)
Test 4: NA Modified 5.7L Crate vs Sniper Nitrous (100-hp Shot)
Test 5: NA 6.4L Hemi vs Zex Nitrous (100-hp Shot)
Test 6: NA 6.1L SRT8 Hemi vs Zex Wet EFI (200 hp)
Test 7: NA 426 Hemi vs NX (175 hp)
Chapter 8: Engine Builds
Test 1: Stock 5.7L Crate vs 5.7L Hemi Crate Update
Test 2: Stock 5.7L vs 370 Stroker
Test 3: 6.1L Hemi-Effect of Timing (20 vs 27 vs 33 Degrees)
Test 4: Stock 5.7L Crate vs Upgraded 5.7L Crate
Test 5: High-rpm 392 Stroker
Test 6: 5.7L NA vs Zex Nitrous (250-hp Shot)
Test 7: 6.1L NA vs Vortech Supercharged
Test 8: Modified 6.1L NA vs Twin Turbo
Source Guide
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