Building a 304 Stroker Motor
http://www.michiganmusclecars.net/articles/24/1/Building-a-304-Stroker-Motor/Page1.html
Mark Potes
Cars have been a big part of my families life. We have always had at least 1 muscle car in the family and most of the time many.I was brought up with Mopars in the driveway in my teens. This is the brand I own and choose to follow. I admire and respect many other muscle cars and would have a barn full of all brands if I had the means to do it.
Who doesn't like a Vette or a Mustang? How about a 55-57 Chevy? I would like to have an old 55 Gasser. How about a Willys? Wow. I saw two bad ass 40 Willy's at the Woodward Dream Cruise this year traveling together. You could hear them coming for blocks away. This is over all the other muscle that was bumper to bumper. Way cool rides.
I have decided to put my time and energy into writing and documenting my passion for all things muscle car. I hope you enjoy the site and maybe even contribute. Start your own blog here. Once again we welcome all brands. So don't be shy because I am a Mopar owner. I do love horsepower and can't get enough of it!
Mark Potes
By Mark Potes
Published on March 24, 2009
So you've got a 304 setting on your garage floor. What can you do to get some serious torque out of this AMC small block? See how this 304 got stroked and poked.
Stroker 304 Project Build
Rick Jones has been working on American Motors cars since before he could legally drive. He has become a very accomplished restoration craftsman. He has also become in demand for his engine building skills. Reliable, strong running motors gets any car lovers attention.
Greg Taylor came to Rick with a 304 motor he wanted to build for his Jeep. He was looking for more power and better mpg. Rick and Greg came up with a game plan and set it into motion. Here are the engine specs:
**** BUILD SPECS - 330" AMC V8 ****
BLOCK: 1979 AMC 304 V8 (milled for Zero-Deck)
Bore : 3.83” (stock 304 is 3.75”)
CRANK: NOS AMC 390 Forged crank (cross-drilled)
Stroke : 3.574” (stock AMC 401)
RODS: 5.858” long AMC 401 I-beam rods 1.001” bushing for floating pin
PISTONS: Custom forged Diamond Racing pistons (Special design for AMCs)
Result in 9.8:1 compression with 58-cc heads
CAM: Crower Turbomaster Hydraulic flat tappet for AMC V8
Advertised Intake Duration : 278
Advertised Exhaust Duration : 260
Intake Duration @ 0.050” lift : 212
Exhaust Duration @ 0.050” lift : 200
Intake Valve Lift w/1.6 Rocker Ratio : 0.461”
Exhaust Valve Lift w/1.6 Rocker Ratio : 0.426”
Lobe Separation : 114
LIFTERS: Rhodes anti-pump up hydraulic lifters (variable duration)
Low RPM = 190 PSI Cranking Pressure
High RPM = 177 PSI cranking pressure
HEADS: 1979 AMC 360 heads. ~58cc Chambers
Heads will incorporate combustion chamber grooves which allow use of 87 octane gas on 10:1 motors … may run E85 at some point
VALVES: Small Block Chevy conversion (w/undercut stems)
INT: 1.94” diameter (stock AMC 304 is 1.787”)
EXH: 1.50” diameter (stock AMC 304 is 1.406”)
ROCKER ARMS: Scorpion 1.6:1 Aluminum roller rockers for AMC V8 (Pedestal-mount setup … modified Ford Pedestal)
HEAD GASKET: ROL XTreme 0.045” compressed thickness
INTAKE MANIFOLD: Offenhauser 360 Equa-flow intake for AMC V8 with Quadrajet pattern
CARBURETOR: Brand new 2.0” bore Fish Carburetor (new limited production run) ... ... very unique & rare carb ... out-performs any other carb in power and MPGs, and can switch between multiple fuels with only minutes of adjustment. Carb has NO JETS.
EXHAUST: Doug Thorley Tri-Y Headers for Full Size Jeeps. 3.0” single exhaust. Modified for Lambda O2 sensor port
You can view a post Greg made to see more details and motor pics. 304 stroker motor pics.
Mark
Greg Taylor came to Rick with a 304 motor he wanted to build for his Jeep. He was looking for more power and better mpg. Rick and Greg came up with a game plan and set it into motion. Here are the engine specs:
**** BUILD SPECS - 330" AMC V8 ****
BLOCK: 1979 AMC 304 V8 (milled for Zero-Deck)
Bore : 3.83” (stock 304 is 3.75”)
CRANK: NOS AMC 390 Forged crank (cross-drilled)
Stroke : 3.574” (stock AMC 401)
RODS: 5.858” long AMC 401 I-beam rods 1.001” bushing for floating pin
PISTONS: Custom forged Diamond Racing pistons (Special design for AMCs)
Result in 9.8:1 compression with 58-cc heads
CAM: Crower Turbomaster Hydraulic flat tappet for AMC V8
Advertised Intake Duration : 278
Advertised Exhaust Duration : 260
Intake Duration @ 0.050” lift : 212
Exhaust Duration @ 0.050” lift : 200
Intake Valve Lift w/1.6 Rocker Ratio : 0.461”
Exhaust Valve Lift w/1.6 Rocker Ratio : 0.426”
Lobe Separation : 114
LIFTERS: Rhodes anti-pump up hydraulic lifters (variable duration)
Low RPM = 190 PSI Cranking Pressure
High RPM = 177 PSI cranking pressure
HEADS: 1979 AMC 360 heads. ~58cc Chambers
Heads will incorporate combustion chamber grooves which allow use of 87 octane gas on 10:1 motors … may run E85 at some point
VALVES: Small Block Chevy conversion (w/undercut stems)
INT: 1.94” diameter (stock AMC 304 is 1.787”)
EXH: 1.50” diameter (stock AMC 304 is 1.406”)
ROCKER ARMS: Scorpion 1.6:1 Aluminum roller rockers for AMC V8 (Pedestal-mount setup … modified Ford Pedestal)
HEAD GASKET: ROL XTreme 0.045” compressed thickness
INTAKE MANIFOLD: Offenhauser 360 Equa-flow intake for AMC V8 with Quadrajet pattern
CARBURETOR: Brand new 2.0” bore Fish Carburetor (new limited production run) ... ... very unique & rare carb ... out-performs any other carb in power and MPGs, and can switch between multiple fuels with only minutes of adjustment. Carb has NO JETS.
EXHAUST: Doug Thorley Tri-Y Headers for Full Size Jeeps. 3.0” single exhaust. Modified for Lambda O2 sensor port
You can view a post Greg made to see more details and motor pics. 304 stroker motor pics.
Mark