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Diamond Pistons

Ford Small Block
Twisted Wedge / Race - Flat Top
Piston

• Max deep valve pockets for large race cams.
• Fits T/W & T/W “R” heads.
• Designed for forced induction or medium to large nitrous applications.
• 2618 alloy.
• Ratios figured for “0” deck.
• Standard 1/16” x 1/16” x 3/16” ring package.
• Premium 8620 wrist pins included.
• Gasket volume = 8.8cc’s.
• Top ring down = .300”.
• Designed for 2.080” diameter intake valves & 1.600” exhaust valves.
• Valve relief depths = .310” intake and .260” exhaust.
• Items are non-stock parts, made to order as necessary.

302 Block - 8.190" Deck Height
Part #
Bore
Stroke
Rod
C. D.
Wt
Pin
CC's
Comp Ratio
Purchase Online
58cc 62cc 66cc
9.3
9.3
9.4
9.7

8.9
8.9
9.0
9.2

8.5
8.5
8.6
8.8
31700
$686
4.030
4.040
4.060
4.125
3.000
5.090
1.600
-
.912
-7.7
31706*
$717
4.030
4.040
4.060
4.125
3.250
5.400
1.165
-
.927
-7.7
10.0
10.0
10.1
10.4

9.5
9.5
9.6
10.0

9.1
9.1
9.2
9.5

 

302 Block - 8.190" Deck Height Valve pocket depth for 1.090” C.D. Pistons are: Intake = .289”, Exhaust = .260” with a .265” down top ring
Part #
Bore
Stroke
Rod
C. D.
Wt
Pin
CC's
Comp Ratio
Purchase Online
58cc 62cc 66cc
10.5
10.5
10.6
11.0

10.0
10.0
10.1
10.5

9.6
9.6
9.7
10.0
31711
$717
4.030
4.040
4.060
4.125
3.400
5.400
1.090
-
.927
-6.9

 

351 Windsor Block - 9.470" Deck Height
Part #
Bore
Stroke
Rod
C. D.
Wt
Pin
CC's
Comp Ratio
Purchase Online
58cc 62cc 66cc
10.7
10.7
10.8
11.1
10.2
10.2
10.3
10.6
9.7
9.8
9.9
10.1
31716
$686
4.030
4.040
4.060
4.125
3.500
5.956
1.764
-
.912
-7.7
31721
$660
4.030
4.040
4.060
4.125
3.850
6.200
1.345
-
.927
-7.7
11.6
11.7
11.7
12.1
11.1
11.1
11.2
11.6
10.6
10.6
10.7
11.0
31726*
$717
4.030
4.040
4.060
4.125
4.000
6.200
1.270

482
-
-
-

.927
-7.7
12.0
12.0
12.1
12.6
11.5
11.5
11.6
12.0

11.0
11.0
11.1
11.5

31735
$717
4.030
4.040
4.060
4.125
4.000
6.200
1.295
-
.927
-7.7
12.0
12.0
12.1
12.6
11.5
11.5
11.6
12.0
11.0
110.
11.1
11.5

 

351 Windsor Block - 9.470" Deck Height
Part #
Bore
Stroke
Rod
C. D.
Wt
Pin
CC's
Comp Ratio
Purchase Online
58cc 62cc 66cc
12.0
12.0
12.1
12.6
11.5
11.5
11.6
12.0
11.0
11.0
11.1
11.5
31731*
$717
4.030
4.040
4.060
4.125
4.000
6.250
1.250
-
.927
-7.7

 

* Includes Oil ring support rails.

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

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About RPM Machine | Specials | Newsletter
RPM Machine-Performance Auto Parts
8060 so 1300 W
West Jordan Utah 84088
We carry parts from scat, je, wiseco, ross, crower, callies, eagle, cat, eagle
Most of our rotating assemblies include forged pistons
and 4340 steelcranks


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