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03-12-2021, 02:53 AM | #1 |
Scooby Newbie
Member#: 522441
Join Date: Feb 2021
Location: SLC, UT
Vehicle:2007 OBXT Pearl White |
Forged Pistons, Brand New Block, Rehone?
Got a brand new, never ran Type RA block fresh out the factory. Planning on replacing pistons with Manley 99.5mm forged pistons. Read some forums with people saying I'd need to rehone due to expansion, and others saying they just dropped 'em right in with no issues.
So I thought I'd ask NASIOC for help.
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03-12-2021, 10:35 AM | #2 |
Scooby Specialist
Member#: 491095
Join Date: Sep 2018
Chapter/Region:
SWIC
Location: New Mexico
Vehicle:2009 STi Blue Blue |
realistically a measure for expansion is best, but they are designed to be "drop in" ready, just make sure you get the correct a/b bore
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04-17-2021, 04:53 PM | #3 |
Scooby Specialist
Member#: 437670
Join Date: Jan 2016
Location: VT
Vehicle:2005 2.5 SC OB |
There is a lot of talk that the PTW is too big on the Manley drop ins. But I would like to see someone who has actually measured them and report the PTW.
IAG after all uses JE drop in pistons in their stage 1 block which uses factory bores , so it must be possible to get this right. |
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