Speed Pro Hypereutectic Dome Pistons PLUS MOLY Rings for Chevrolet 454
About Speed Pro Digital Diamond Profile Hypereutectic Pistons:
Dominating the horsepower-per-dollar race.
These
Speed-Pro Digital Diamond Profile (DDP) hypereutectic pistons feature a
new digital actuated diamond turning process that produces precision
skirt profiles. This new Digital Diamond Profile (DDP) technology
creates a unique barrel profile of the pistons, promoting an oil wedge
between the piston skirt and the cylinder wall. They feature a newly
designed ring groove geometry using Thermal Arching Compensation (TAC)
that machines the piston ring grooves with an uptilt to offset thermal
arching distortion. This squares the ring face up to the cylinder wall
for increased power and decreased oil consumption. The Speed-Pro
Digital Diamond Profile hypereutectic pistons feature the next
generation of Duroshield skirt coating, reducing friction across the
entire rpm range and increasing wear resistance for longer life and
superior noise and vibration reduction. They also use
precision-machined piston pin bores that allow for either fixed or
floating wrist pins; pin locks available separately. The pistons come
weight-matched to a 4 gram (+/-2 grams) maximum variation within every
engine set.
***Please let us know what size you need at checkout***
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Federal Mogul/Speed Pro Piston Part
Number
|
Application |
Power Range |
Special requirements |
Compression information
|
Ring groove size
Pin diameter
|
Rod length
Stroke
|
Deck clearance
Skirt clearance
|
|
H581CP STD plus moly piston ring set (Hastings/Perfect Circle/MAHLE) P/N H581CP-KIT
We also have other sizes available.
|
Chevrolet 454 - 4.250" bore (at STANDARD)
Domed head .340" high (30cc) w/2-valve reliefs. DurOshield skirt coated piston.
1970-76 Car (USA)
|
idle to 7000+rpm |
Good for street or race/nitrous to 150 sho |
1.640" compression distance
Approx. Compression (w/.030" bore):
w/106.9cc heads 11.46:1
w/116.9cc 10.41:1
w/119cc 10.22:1
|
5/64" 5/64" 3/16" ring grooves
.989" pin diam. - pins included
|
for stock length 6.135" rods
Press-fit or floating
Stock 4.000" stroke
|
025" deck clr
.0015" skirt clr
|
