Q: I’m planning a Mopar 440 to 500ci stroker build. One thing I have had trouble picking out is the camshaft. The engine will be going in my 1970 Challenger that I want to be streetable but with a healthy lope. I’m looking at a hydraulic roller so I can have the largest usable rpm range. How does the larger displacement affect the behavior of the cam? If the cam is listed to have an rpm range of 2,200 to 6,000 rpm for a 440, will that change for a stroker? Should I be shooting for more duration or lift to accommodate the extra displacement? When do you pick higher ratio rockers versus just getting a cam with more lift? For background, I plan to use Trick Flow heads and an Edelbrock Performer RPM intake manifold with a Holley Sniper EFI system. This will be my first engine build, and I will be buying the stroker short-block from an engine builder.
HOLMES’ 505CI CHRYSLER ADDITIONAL INFORMATION
Direct conversation with Mr. Holmes returned this additional information.
Short-Block
Muscle Motors Racing short-block
Displacement
505.3ci
Bore x Stroke
4.35” bore x 4.25” stroke
Connecting Rod
7.100” center-to-center
Rod/Stroke Ratio
1.67:1
Cylinder Heads
Trick Flow Specialties PowerPort 240
Combustion Chamber
78cc
Valve Sizes
2.190” intake/1.760” exhaust
Peak Flow @ 0.700 Lift
334 cfm intake/262 cfm exhaust
Compression Ratio
This story is from the December 2020 edition of Hot Rod.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 8,500+ magazines and newspapers.
Already a subscriber ? Sign In
This story is from the December 2020 edition of Hot Rod.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 8,500+ magazines and newspapers.
Already a subscriber? Sign In
Making Connections
Project T-top Coupe: We install a Terminator X Max for big power.
LET IT BREATHE!
Project X’s new ZZ632 big-block needed to breathe, and this do-ityourself stainless exhaust kit was just the ticket to make it happen.
TUNING OPTIMIZED
VARIABLES WITHIN FUEL-INJECTOR CONSTRUCTION CAN LEAD TO POOR ENGINE OPERATION. HERE'S HOW TO TUNE YOUR FUEL INJECTORS.
Re-Flange It!
We check out the fab skills needed to run a flat hood on a 1970 Mustang with a very unique and too-tall engine.
THE TRIBUTE FOR THE WIN
Ron Capps wins the NHRA U.S. Nationals driving a Don Prudhomme-Hot Wheels tribute Funny Car.
So Close
Following a nearly flawless performance, a pít lane penalty kept the C8.R off the top of the podium in the IMSA Sportscar Weekend.
A RADICAL SHIFT
When you're a teenager and the police know you by name, it's not usually because of your volunteer work or class-topping GPA. Not at all. That was especially true for Jeff Kainz when he was behind the wheel of his 1975 Camaro. In the '80s, while cruising his hometown in North Dakota, his buddies with police scanners often heard the police tell one another: \"Kainz is out on Main Street.\"
WILD MASH-UP
Built to long-haul the 2023 HOT ROD Power Tour, this 1984 Monte Carlo’s facade hides a performance secret!
6 TIMER!
Tom Bailey captures his 6th HOT ROD Drag Week Unlimited/Overall title with his Sick Seconds 1.0 Camaro.
JIM MCFARLAND'S INFLUENCE WENT WAY BEYOND HOT ROD MAGAZINE.
Jim McFarland, the multitalented, multifaceted Texan who enjoyed several careers in the automotive performance industry, passed away in October 2023 at the age of 88.