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#1 |
Scooby Newbie
Member#: 99163
Join Date: Oct 2005
Chapter/Region:
South East
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![]() Hello all,
I'm at the point with my car, an 05 STi which I have owned since new, where I need to make some decisions. Particulars: 162,000 miles OEM block, OEM top mount, IXIZ AOS, full KillerBee oil setup, replaced VF39 with low mileage VF48 about 30k miles back, catless exhaust. Just replaced the injectors with new oem (1 of the original was failing) Mostly used T6 with 3k mile change intervals. Tuned for 19 psi and 10.8 afr, have a lower boost track tune. Not really relevant, but all bushings replaced, Feal 441's, and a Southbend clutch. Engine running well at this point. Uses: Florida car I have a backup car that I rarely drive because I still enjoy my STi, so it sees daily usage. 5 days a week, with few exceptions, it gets a 3rd and 4th gear pull, but otherwise driven easily due to traffic. Have taken it to 1 open track day (earlier this year, but want to start doing a few per year). Never launched, never drag raced. Taken to the "Dragon" several times, but not in the last few years. Not looking for big power build, want reliable as I don't like wrenching (even though I do it) and my confidence in local shops is minimal to say the least. Always warmed up and always given time to cool down. My question: Realizing this is hypothetical until the block is removed, but is it probable that this block is toast given the mileage or can the cylinders be cleaned up and new pistons installed? OEM or IAG block for my purposes. Either way, I'd assume that the heads will need attention - is there some sweet power mod to be done on them? EDIT: Wally 255 in fuel tank, E85 not available close. Thanking you all in advance for your input OGITB
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Last edited by ogintheback; 11-09-2019 at 02:25 PM. |
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#2 |
NASIOC Supporter
Member#: 130990
Join Date: Nov 2006
Chapter/Region:
NWIC
Location: Menzel Lake, WA
Vehicle:06 Red Ltd.Wagon Dom 1.5xtr JJ tuned |
![]() Based on my experience, it's tough to beat an IAG Stage 2 or Stage 2 Tuff block. My heads had a mild upgrade, better valves, some cleanup of casting defects, beehive springs and some Kelford 199-B exhaust cams (my builder had a spare set and practically gave the to me). You could keep most everything else, but I'd advise some bigger injectors, fuel pump upgrade and a flex fuel option if possible. An E-85 tune would give you all the power you could want. Don't worry about adding tons of fancy bits. Good luck!
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#3 | |
Scooby Newbie
Member#: 99163
Join Date: Oct 2005
Chapter/Region:
South East
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Thank you! Should have mentioned, would love e85, but none is available close. You mention better valves - is that in regards to materials used or shape/profile of the valves? |
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#4 | |
Former Vendor
Member#: 93646
Join Date: Aug 2005
Chapter/Region:
MWSOC
Vehicle:Many Track Records Let us help you go fast! |
![]() Quote:
For that machine work on a case with that many miles you will want at a bare minimum: Bore and hone - you'll need the pistons on hand so PWC can be set correctly. Please be sure to have a torque plate used. Line bore - I find this is much more accurate than a line hone. Likely you will need the case decked. Now, from a cost standpoint that's where things get interesting. A new case is about 1K. My COST to have that machine work done by one of the better machine shops is about 1K, and depending upon how messed up other bits are it may be more. Keep in mind that's MY COST. So, it may be in your better interest to just buy fresh. As for buying fresh there are a number of shops that build a very good short block and there are many many more shops that do a horrible job. Please take some time to do your research, talk to some shops about your goals, and then go from from there. |
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#5 | |
Scooby Newbie
Member#: 473523
Join Date: Aug 2017
Chapter/Region:
Tri-State
Location: New Jersey
Vehicle:2004 wrx sti wrb |
![]() Quote:
So I pulled the trigger and got the iag stage 2 tuff block. https://www.iagperformance.com/IAG-S...g-eng-1213.htm Here's my thread that has more detailed information. I hope it helps! Good luck with your build. https://forums.nasioc.com/forums/sho...1#post46170004 |
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#6 |
Scooby Specialist
Member#: 100300
Join Date: Nov 2005
Chapter/Region:
MWSOC
Location: MIC|-|IG/\N
Vehicle:06 WRX CGM |
![]() Is current engine burning oil?
My 2006 has 312k and barely burns any oil. Just thinking if it ain't broke dont fix it. If you have $ burning a hole in pocket, build a replacement engine and flog the stocker until it dies. |
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#7 |
Scooby Guru
Member#: 56203
Join Date: Feb 2004
Chapter/Region:
Tri-State
Location: south nj
Vehicle:00 RSTI Coupe Twin Scroll 2.5XTR EJ207 |
![]() Have you done a compression test to see if the injector failure cause any issues? If it didn't I'd just run that engine until it craps the bed and build a spare on the side so there's no down time. If you get lucky and have the new engine built before this one fails you could sell it to help offset the costs.
With that said yes your engine will probably be fine for a bore/hone to larger pistons and like TIC mentioned the mains could need some machining. Although doing a main line bore on a suby is expensive and very few shops can do it correctly. Only a few shops come to mind with Motion Machine probably being the best. GL |
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#8 |
Scooby Specialist
Member#: 491095
Join Date: Sep 2018
Chapter/Region:
SWIC
Location: New Mexico
Vehicle:2009 STi Blue Blue |
![]() I'm right behind you...got extra longblock sitting on a pallet ready to go when something happens!
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#9 | |
Scooby Newbie
Member#: 99163
Join Date: Oct 2005
Chapter/Region:
South East
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![]() Quote:
What got me thinking about this is the damn Togue Fest, open track days, etc. I bought the car to have fun with - which for me means driving it. As it is today, the engine runs well and there is only a little fbk, flk in the cruise area and only infrequently. So, what I was/am trying to figure out is if the block could be rebuilt then I don't want to blow a hole in it driving the crap out of it. Butttttttt, if that is senseless (to those of you with this kinda knowledge) then I'm not going to worry about trying to preserve the block. |
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#10 | |
Scooby Newbie
Member#: 99163
Join Date: Oct 2005
Chapter/Region:
South East
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#11 |
Scooby Newbie
Member#: 99163
Join Date: Oct 2005
Chapter/Region:
South East
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![]() I'd like to say "thank you" to all of you who have responded. I know my question doesn't quite fit into this section of the forums, but I knew this is where the knowledge and experience is.
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#12 |
Scooby Specialist
Member#: 437670
Join Date: Jan 2016
Location: VT
Vehicle:2005 2.5 SC OB |
![]() It sounds like this car has been babied. If you do a compression/leak down test and nothing is leaking you might as well just keep driving it. You could spring for a $20 used oil analysis too. If it ain't broke???
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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:
I’d finish filling out your profile but it says your in the south east which is where Motion Machine is. Pretty sure he doesn’t do assembly but he’s one of the better/best machinist with suby experience so if you can handle putting the block together when you get closer to pulling the trigger I’d hit him up |
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