Home
A
Air Filters & Systems
B
Balancers & Dampers
Bearings
Blocks & Accessories
Blowers
Bolt Kits
C
Camshafts
Carburetors & more
Clutch Parts & Bearings
Connecting Rods
Crankshafts
Cylinder Heads
Cylinder Sleeves
D
Distributors, etc.
Dress Up
E
Engine Complete
Engine Rebuild Kits
Exhaust Manifolds
Exhaust Systems
F
Fasteners
Flywheels & Flexplates
Freezeplugs
Fuel System
Accessories
G
Gaskets
Gear Drives
GM Performance Parts
Guide Plates
H
Harmonic Balancer
Head Bolts & Kits
Head Studs
Heat Protection Products
Headers
I
Ignition Systems
Ignition Wires
Imports Section
Intakes
L
Lifters
M
Main Bolts
Main Caps &
Girdles
Machining
Marine-
Perf. Products
N
Nitrous Systems
O
Oil Pans & more
Oil Pumps, etc.
P
Pistons
Piston Pins & Spiro Locks
Pulleys
Pushrods & Accessories
R
Rear End Parts
Rev Kits
Rocker Arms & more
Roller Rockers, etc.
Rotating
Assemblies
S
Services &
Machining
Shifters
Starters &
Accessories
Stud Girdles
Stroker Kits
T
Timing Sets & more
Tools
Transmissions
V
Valves
Valve Covers, etc.
Valve Springs
Valvetrain
Components
W
Water Pumps &
Components
Windage Trays
Wires


Diamond Pistons

Ford Big Block 385 Series
Race Series (Motorsport A&B)- Dome Top
Piston

• Drag race dome - largest traverse style dome for the TFS & A head. 2618 alloy.
• Fits Morotsport “A” & “B”, and TFS “Race” heads only.
• Will work with medium to large nitrous applications.
• Developed for drag racing.
• Ratios figures for .005” - .015” deck@10.300”.
• Standard 1/16” x 1/16” x 3/16” ring package.
• Premium H-13 pins included.
• Head gasket volume = 11cc’s (average).
• Top ring down = .350”.
• Valve relief depth = .275” intake & .059” exhaust.
• Will accept 2.400” x 1.900” valves.
• Items are non-stock parts, made to order as necessary.

385 Series Race Series motorsport A&B
Part #
Bore
Stroke
Rod
C. D.
Wt
Pin
CC's
Comp Ratio
Purchase Online
91cc 83cc 78cc

12.3
12.3
12.4
12.5

13.4
13.4
13.5
13.6

14.2
14.2
14.3
14.5
40701
$872
4.390
4.400
4.420
4.440
4.150
6.800
1.420
-
.990
14.5
40711*
$872
4.390
4.400
4.420
4.440
4.300
6.800
1.335
-
.990
14.5
12.7
12.7
12.9
13.0

13.8
13.9
14.0
14.1

14.6
14.7
14.8
14.9

40721*
$908
4.390
4.400
4.420
4.440
4.500
6.800
1.235
-
.990
14.5
13.2
13.3
13.4
13.5

14.4
14.5
14.6
14.7

15.3
15.3
15.5
15.6
40731*
$872
4.390
4.400
4.420
4.440
4.500
6.700
1.335
-
.990
14.5
13.2
13.3
13.4
13.5

14.4
14.5
14.6
14.7

15.3
15.3
15.5
15.6

 

385 Series Race Series motorsport A&B
Bore sizes listed below use a .043” x .043” x 3/16” ring pack & radial gas ports!
Part #
Bore
Stroke
Rod
C. D.
Wt
Pin
CC's
Comp Ratio
Purchase Online
91cc 83cc 78cc
12.7
12.9
13.1
13.3
13.4
13.9
14.0
14.2
14.4
14.6
14.7
14.9
15.0
15.3
15.4
40705
$872
4.500
4.530
4.560
4.600
4.625
4.150
6.800
1.420
-
.990
12.5
40715*
$872
4.500
4.530
4.560
4.600
4.625
4.300
6.800
1.335
-
.990
12.5
12.9
13.0
13.1
13.4
13.5
14.0
14.1
14.3
14.5
14.6
14.8
14.9
15.1
15.4
15.4
40725*
$908
4.500
4.530
4.560
4.600
4.625
4.500
6.800
1.235
-
.990
12.5
13.4
13.6
13.7
13.9
14.0
14.5
14.7
14.9
15.1
15.3
15.4
15.5
15.7
16.0
16.1
40735*
$872
4.500
4.530
4.560
4.600
4.625
4.500
6.700
1.335
-
.990
12.5
13.4
13.6
13.7
13.9
14.0
14.5
14.7
14.9
15.1
15.3
15.4
15.5
15.7
16.0
16.1
40745*
$908
4.500
4.530
4.560
4.600
4.625
4.750
6.700
1.210
-
.990
10.0
13.7
13.9
14.1
14.3
14.4
14.9
15.0
15.2
15.5
15.6
15.7
15.9
16.1
16.3
16.5

 

* Includes Oil ring support rails.


 
Call 1-877-354-3812
to order your Parts Today!

Contact us Via Email

About RPM Machine | Specials | Newsletter
RPM Machine-Performance Auto Parts
146 Ea 13065 So Suite F
Draper Utah 84020
We carry parts from scat, je, wiseco, ross, crower, callies, eagle, cat, eagle
Most of our rotating assemblies include forged pistons
and 4340 steelcranks


Big game hunters!
Need Redbone Hounds?
Copyright © 2007 RPM Machine | Designed by Utah Web Services, a division of Wiworks, Inc.