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#76 |
Scooby Specialist
Member#: 395275
Join Date: Jul 2014
Chapter/Region:
RMIC
Location: Brighton, CO
Vehicle:2012 STi SWP |
![]() Been running these in my car for 22k miles. So far, no oil consumption and no issues.
New case halves. BBBB Manley B-graded drop ins with total seal Eagle H-beam rods King bearings OEM 2012 STi crank Car is making ~500 whp on high boost, and ~420 on normal boost. E85 mostly.
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#77 |
Scooby Specialist
Member#: 437670
Join Date: Jan 2016
Location: VT
Vehicle:2005 2.5 SC OB |
![]() Has anyone had any luck putting graded forgers into a used block that has just been honed?
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#78 |
Scooby Specialist
Member#: 73932
Join Date: Nov 2004
Chapter/Region:
RMIC
Location: Denver
Vehicle:2005 STi EFR 6758 04 S2000 EFR 7064 |
![]() I would not do that, they are noisy enough with a new block.
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#79 |
Scooby Newbie
Member#: 275099
Join Date: Feb 2011
Chapter/Region:
NESIC
Location: MA
Vehicle:2015 STI Limited CWP |
![]() They make a 99.55, but most used blocks should really go to 99.75 off you want a nice square bore and run tighter PTW. You'll see this once torque plates are installed.
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#80 |
Scooby Specialist
Member#: 273868
Join Date: Feb 2011
Chapter/Region:
MAIC
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![]() Last edited by motorbykemike; 08-02-2019 at 08:22 AM. |
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#81 |
Scooby Newbie
Member#: 276121
Join Date: Mar 2011
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![]() 99.55 requires the bore to go from 3.9179 factory to 3.9192-3.9200 depending on desired piston to wall, they are NOT and could never be drop-ins.
Additionally they ship with 99.50 Total Seal rings which out of the box have first and second ring gaps in the .021-.026 range in the 3.9200 bore, which in my opinion is too loose for a non-race engine, and the oil rail gaps are huge if you care about those. I just did this and I ended up getting them to work by buying a 99.75 set of the same rings and mix-n-matching to gap them to .018/.019 first and .025/.026 second. Highly would not recommend, do drop-ins and wait to blow a head gasket or spin a rod bearing, or properly hone to 99.75 and buy those. |
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#82 |
Scooby Specialist
Member#: 437670
Join Date: Jan 2016
Location: VT
Vehicle:2005 2.5 SC OB |
![]() We are talking about grade A and B drop ins. Pretty sure these are made specifically to drop in without boring?
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#83 |
Scooby Newbie
Member#: 276121
Join Date: Mar 2011
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#84 | |
Scooby Newbie
Member#: 275099
Join Date: Feb 2011
Chapter/Region:
NESIC
Location: MA
Vehicle:2015 STI Limited CWP |
![]() Quote:
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#85 |
Scooby Specialist
Member#: 437670
Join Date: Jan 2016
Location: VT
Vehicle:2005 2.5 SC OB |
![]() Does anyone else make A/B pistons?
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#86 |
Scooby Newbie
Member#: 308314
Join Date: Jan 2012
Chapter/Region:
W. Canada
Location: Penticton BC
Vehicle:1999 Impreza RSTI Metallic White |
![]() I’ve been running these pistons for two years now.. no issues. They chatter a bit on start, but my block has a lot of miles on it. Haven’t had it tuned since the rebuild. But it was dyno’d at 282whp and 295lb’ at the wheels with 11psi. I don’t regret getting these compared to getting the block machined for other pistons and still having cold start noise.. once they warm up it’s quiet and runs great.
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#87 |
Scooby Specialist
Member#: 437670
Join Date: Jan 2016
Location: VT
Vehicle:2005 2.5 SC OB |
![]() If IAG puts drop in pistons in, I am sure they’re fine on a NEW block. They actually use JE I think.
Last edited by pcampbell; 06-02-2020 at 11:32 AM. |
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