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#1 |
Scooby Specialist
Member#: 127745
Join Date: Oct 2006
Chapter/Region:
NWIC
Location: CA
Vehicle:06 WRX 30r 6 speed 99L EJ255 6 Speed |
![]() ...and I am not referring to the shorter skirt and Napier second rings that are standard now. Check page 23 of the Piston section, or page 118 of the Master catalog.
Apparently they now have a 99.55mm piston, as well as an "A" and "B" option!! 612001C-4 for the 99.55 612000CA-1 and 612000CB-1 (only sold individually I guess) Discuss!!
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#2 |
Former Vendor
Member#: 295846
Join Date: Sep 2011
Chapter/Region:
MWSOC
Location: Crook County, Illinois
Vehicle:WRX FP HTA GT3076R Sexual Chocolate |
![]() Funny I was on the phone with Jesse @ Manley today. I have to call him back on monday, I'll chat with him about those and post back.
-Phil |
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#3 |
Scooby Guru
Member#: 56203
Join Date: Feb 2004
Chapter/Region:
Tri-State
Location: south nj
Vehicle:00 RSTI Coupe Twin Scroll 2.5XTR EJ207 |
![]() Nice so we could just hone used blocks to fit these pistons?
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#4 |
Scooby Newbie
Member#: 209880
Join Date: Apr 2009
Location: Knoxville,TN
Vehicle:2006 STI white |
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#5 |
Scooby Specialist
Member#: 127745
Join Date: Oct 2006
Chapter/Region:
NWIC
Location: CA
Vehicle:06 WRX 30r 6 speed 99L EJ255 6 Speed |
![]() Why would it be for the "new case" crowd? It's not like cylinders see that much wear...especially on stock pistons
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#6 |
Scooby Specialist
Member#: 169562
Join Date: Jan 2008
Chapter/Region:
South East
Location: cary / holysprings, nc
Vehicle:2002 Wrx Glacier frost mica |
![]() Almost all case halves have a combination of A s and B s . Hence the need for 2 different pistons . Also why drop ins are often noisey.
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#7 | |
Former Vendor
Member#: 295846
Join Date: Sep 2011
Chapter/Region:
MWSOC
Location: Crook County, Illinois
Vehicle:WRX FP HTA GT3076R Sexual Chocolate |
![]() Quote:
I generally dont like removing material from a stock cylinder liner. .010 is the max for me. I will not sell a .020 or 100mm overbore on a stock liner period. Anyway you slice it, a forged slug install needs machine work. And I will just throw this out there, if you're going to spend xx thousand on your parts for your built motor, when the seller/machinist recommends something and you decide to skip it or go with something cheaper. Just remember, you get what you pay for. Do your homework. If you're going to spend xxthousand, take half the time it took you to make that money, that you now are going to spend, and research what you're buying. It really sucks having to clean up other peoples messes. /rant -Phil ![]() |
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#8 |
Scooby Specialist
Member#: 127745
Join Date: Oct 2006
Chapter/Region:
NWIC
Location: CA
Vehicle:06 WRX 30r 6 speed 99L EJ255 6 Speed |
![]() I understand that. Given the sizes of OEM 99.5 pistons, and the right clearances they run, it is entirely possible that the 99.55 pistons will work perfectly on a used block. There is upward of .003" to play with...is it common to have that much wear if there are no scratches to bore/hone out?
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#9 |
Scooby Specialist
Member#: 243992
Join Date: Apr 2010
Chapter/Region:
MWSOC
Location: Morton Grove, Illinois
Vehicle:2006 WRX TR WRB |
![]() Someone post a pic!
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#10 | |
Former Vendor
Member#: 295846
Join Date: Sep 2011
Chapter/Region:
MWSOC
Location: Crook County, Illinois
Vehicle:WRX FP HTA GT3076R Sexual Chocolate |
![]() Quote:
The difference between the two pistons is .002 The 99.5 being 3.917 and the 99.55 being 3.919 I guess in a perfect world with no variables sure, but I think that these are more meant for new cases that are going to be honed out anyway, it would be nice to be able to do a fresh hone on a new case and run a nice and tight PTW without having to go to 99.75mm My .002 ![]() |
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#11 |
Scooby Specialist
Member#: 127745
Join Date: Oct 2006
Chapter/Region:
NWIC
Location: CA
Vehicle:06 WRX 30r 6 speed 99L EJ255 6 Speed |
![]() I am familiar woth basic math...thanks. The difference between the pistons is .002"(actually as low as .0014"), but you still need to take .003" off the larger Manley piston for proper PTW (unless you prefer a slightly tighter it lol). I accounted for the difference in piston size as your PTW clearance after tearing town an oem block. Allowing some meat for a hone of course.
Obviously some will be looser than others, but .004"+? I find that difficult to believe on a block that has not scratched the liners. The point is moot on a properly done build anyway as the cylinder will be measured prior to purchase of the pistons. I just think it is silly to dismiss their use on used blocks without actually measuring a couple blocks to see if they will work. Hell i have one in my shop right now that these would work on, but I need a different dish. |
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#12 | |
Former Vendor
Member#: 295846
Join Date: Sep 2011
Chapter/Region:
MWSOC
Location: Crook County, Illinois
Vehicle:WRX FP HTA GT3076R Sexual Chocolate |
![]() Quote:
I have one 2.5 with cracked ringlands in the garage now, I have to tear down. I'll measure out the other three "good" cylinders and see where theyre at. I a few more laying in there, but they all have been bore/honed already. -Phil |
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#13 | |
Scooby Guru
Member#: 56203
Join Date: Feb 2004
Chapter/Region:
Tri-State
Location: south nj
Vehicle:00 RSTI Coupe Twin Scroll 2.5XTR EJ207 |
![]() Quote:
If yes would that mean theres 3 different 99.5s to chose from? Do they have the same options for the 2.0 guys? |
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#14 |
Scooby Specialist
Member#: 278519
Join Date: Apr 2011
Chapter/Region:
SCIC
Location: Phatbotti
Vehicle:30r E85 sti 450+whp kb'izzle |
![]() bump!
Last edited by Irv Weissmanhowerton; 02-21-2013 at 09:18 PM. |
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#15 | |
Scooby Specialist
Member#: 127745
Join Date: Oct 2006
Chapter/Region:
NWIC
Location: CA
Vehicle:06 WRX 30r 6 speed 99L EJ255 6 Speed |
![]() Quote:
You would have to check the catalog for 92mm options as I consider them a waste of time ![]() These are the directions for their A and B drop ins but it also has the latest ring gap data that, according to the tech, is the latest recommendations for all of their piston/rings. Apparently it is a result of discussion and testing with total seal and a test group. Manley Data Sheet This page has the other most recent instructions or their product line Manley Tech Page Last edited by aboothman; 03-15-2013 at 11:35 PM. |
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#16 |
Scooby Specialist
Member#: 191514
Join Date: Oct 2008
Chapter/Region:
NWIC
Location: teh bremerton
Vehicle:'05 FXT 6spd, 98 Fozzy lifted,'01 RS 6spd |
![]() I have a low mileage (<20k) 2010 block that measures out decently, I'd like to ball hone it and try these out.
Any idea where to order these from? Direct from Manley? |
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#17 |
Scooby Specialist
Member#: 218997
Join Date: Jul 2009
Chapter/Region:
South East
Location: Jax
Vehicle:07 WRX Mikey Tuned JE/FSR built,35r 1300c |
![]() I know I might be thread jacking but I do agree with Phil for what it's worth, I'd use these in a fresh block and go to the next size up on use but that is MOP and that doesn't count for much.
My problem is I purchased the 99.75 set and had the machine shop floow the instruction to the letter per Manley, measured the PTWC by their instructions but the pistons don't seem to have enough clearance for their skirts ? I just picked up the block and pistons from the machine shop and have not had a chance to mic them but for sure the tops fit great but when pushed further into the bore the skirts start to fit tight, has anyone seen this ? |
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#18 |
Scooby Specialist
Member#: 218997
Join Date: Jul 2009
Chapter/Region:
South East
Location: Jax
Vehicle:07 WRX Mikey Tuned JE/FSR built,35r 1300c |
![]() I think I know where the machine went wrong, they didn't take their measurments from dead center on the piston .800 down from the oil ring, I think they looked at the drawing and thought you take the measurement closer to the wrist pin area.
I'll know more tonight and post up for all the read, if anyone cares. Thought it might help if another person gets it wrong, if that's the case. |
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#19 |
Scooby Specialist
Member#: 127745
Join Date: Oct 2006
Chapter/Region:
NWIC
Location: CA
Vehicle:06 WRX 30r 6 speed 99L EJ255 6 Speed |
![]() My instructions said to measure from 1 inch below the oil ring which is pretty much the bottom of the skirt
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#20 |
Scooby Specialist
Member#: 218997
Join Date: Jul 2009
Chapter/Region:
South East
Location: Jax
Vehicle:07 WRX Mikey Tuned JE/FSR built,35r 1300c |
![]() When I was there and not thinking about it till I was on the phone with Tom from Manley today that the tech who was mic'ing my pistons held the piston so that when he took his measurement he was taking it more on the side by the wrist pin then in the middle or center of the two wrist pins like you should, I sure you know what I'm trying to explain.
That had to be why there's an issue with the tops going in the holes but the skirts sticking, I'll check tonight but it worries me if that is the reason that they didn't know better than that but from what Tom says that would be the only way this could happen. |
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#21 |
Scooby Specialist
Member#: 127745
Join Date: Oct 2006
Chapter/Region:
NWIC
Location: CA
Vehicle:06 WRX 30r 6 speed 99L EJ255 6 Speed |
![]() Ya that would make sense. All of the Manley instructions I have say 1 inch from bottom oil ring like I mentioned, which is almost bottom of the skirt. My machinist got it right and hit the .003-.0035 I was looking for....with torque plate
![]() It is, after all, the biggest part of the piston. JE says to measure .5" up from bottom of skirt FYI. Anyway Keep in mind Manley also says to gap rings 1" down the cylinder. They also changed their specs last week to open up the ring gap a bit. I think I posted it a few posts up. |
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#22 |
Scooby Specialist
Member#: 218997
Join Date: Jul 2009
Chapter/Region:
South East
Location: Jax
Vehicle:07 WRX Mikey Tuned JE/FSR built,35r 1300c |
![]() Found the problem, when I measured the pistons last night and the cylinders I had .0007/.0008 PTWC and if they would have looked at the instruction sheet and not the photo they would've seen that it calls out for taking your measurements at 1.100 below the oil ring.
So I took them back this morning to have them done correctly, at least it wasn't the other way around, you can always take away more metal but it would be tough to put any back. The rings on a Manley are another issue you could screw up if you don't read their build sheet. I'm use to gapping the top ring tighter than the second but Manley does it the other way around, I assume the top of their piston needs more room ? |
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#23 |
Scooby Specialist
Member#: 127745
Join Date: Oct 2006
Chapter/Region:
NWIC
Location: CA
Vehicle:06 WRX 30r 6 speed 99L EJ255 6 Speed |
![]() Their latest specs say to do em the same. Give Manley East a call and talk to one of their techs
Last edited by aboothman; 03-26-2013 at 07:38 PM. |
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#24 |
Scooby Specialist
Member#: 218997
Join Date: Jul 2009
Chapter/Region:
South East
Location: Jax
Vehicle:07 WRX Mikey Tuned JE/FSR built,35r 1300c |
![]() I'm glad you wrote that since I've question the rings being gapped losser on the top and tighter on the second, thanks for the heads up and I'll call for sure.
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#25 |
Scooby Specialist
Member#: 127745
Join Date: Oct 2006
Chapter/Region:
NWIC
Location: CA
Vehicle:06 WRX 30r 6 speed 99L EJ255 6 Speed |
![]() NP just passing on what i know. Meant to put Manley East BTW they handle all import stuff
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