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Set of8 Speed Pro DDP Chevy 350 Hypereutectic DuroShield Coated Piston Set
About Speed Pro Digital Diamond Profile hypereutectic pistons:
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.
The pistons come weight-matched to a 4 gram (+/-2 grams) maximum
variation within every engine set.
Federal Mogul/Speed Pro Piston Part
Power Range Special requirements
Ring groove size
H423ACP+30 - This listing is for +.030" pistons.
350 Chevy 4" bore (at std) 1968-2000small dish (-10cc; .070" recess) with 4 valve reliefs
idle to 6000+rpm
Good for street or light race
1.540 compression distance
w/64cc heads 8.9:1
w/72cc heads 8.27:1
w/76cc heads 7.99:1
5/64" 5/64" 3/16" ring grooves
.927" pin diam.
PRESS or FLOAT (must use w/LR63 locks)
.025" deck clr
.0010" skirt clr
You get a set of eight pistons. Picture is of actual H423ACP coated pistons in any size listed above.
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