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Old 02-23-2017, 11:46 AM   #26
Squirtledasuby
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Quote:
Originally Posted by IWD View Post
Wow, I can't believe you spent all that money on a 300whp car. I wonder what my pistons look like after being stage 2 power for 60,000 miles. I check my oil every fill and measure it when I change it, and my motor doesn't consume any oil, unlike my 06 STI which drank a quart every change.

As long as your built motor has the same factory clearances and coatings it should be just as reliable. I think it has more to do with people beating the piss out of their motor.
What block you running?
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Old 02-23-2017, 01:07 PM   #27
gsrcrxsi
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Quote:
Originally Posted by IWD View Post
Wow, I can't believe you spent all that money on a 300whp car.

Not for long. This motor was built with a bit of future proofing for the gen2 GTX3071R (KillerB spoolinator kit) that I'll be adding soon. Looking for low to mid 400s on pump 93. Over 500 if I ever decide to run E85 but it's not exactly abundant in my area.

The first build I planned to go to a new turbo too, but I never got around to it.
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Old 02-23-2017, 01:32 PM   #28
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Noticed that you had the IAG 99.75mm bore. Do you think that matters for reliability vs the IAG 99.5 manley pistons with the standard 99.55mm bore?

Concerned that piston slap will greatly reduce the reliability of the built motor and per the IAG website it seems like their stage 1+ with the 99.75mm bore and piston is a tighter fit.
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Old 02-23-2017, 01:52 PM   #29
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Quote:
Originally Posted by Sun&SnowWRX View Post
Noticed that you had the IAG 99.75mm bore. Do you think that matters for reliability vs the IAG 99.5 manley pistons with the standard 99.55mm bore?

Concerned that piston slap will greatly reduce the reliability of the built motor and per the IAG website it seems like their stage 1+ with the 99.75mm bore and piston is a tighter fit.
Shouldn't change anything. If were talking about the same material piston, despite the size, they would likely use the same PTW clearances. Only way i could see more slap on one vs the other, would be if a 2618 was used on one and 4032 used on the other. Even with 2618, it shouldn't drastically reduce the lifespan if everything was properly sized and machined, just more noise during warm up.
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Old 02-23-2017, 03:04 PM   #30
gsrcrxsi
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matching the bores to new oversized pistons allows you to dial in a tighter PTW clearance.

at least in terms of what IAG does, if you have them bore the block to 99.75, they will match the bore specifically to the pistons that will be used for a tight and consistent PTW on each bore.

they do no machining on a new block. they just drop the pistons in. which results usually in a slightly looser PTW clearance. if they machined anything, it would just make it even looser. they cant make the pistons bigger or the bores smaller. (until you step up to the next size)
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Old 02-23-2017, 05:33 PM   #31
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Quote:
Originally Posted by Squirtledasuby View Post
They have a similar block to this same cleareances. But request to run thicker oil.
10w40 it's whole life

Still debating what block to get.
Do you know anyone else running IAG blocks stage 1, and 2 and there experiences?
Thanks
I have a stage 2 block, less than 10k miles right now and an analysis pending at blackstone labs. Hard cold starts this winter resulted in tons of piston slap and I get lots of ghost feedback knock (like -7 degrees or more) from what i'm assuming is the piston slap. Once the car is up to temp, the slap and ghost knock goes away unless its really cold (10f or colder). Didn't eat any oil after 3k miles on Motul 8100 x-cess 5w-40 though. Making 300whp right now but in a couple years i'd like to throw in a 1.5xtr and supporting mods. I'd be happy with 75k+ miles out of it. If I were to do it again i'd defiantly go with their 'Tuff' blocks for a tighter PTW.
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Old 02-23-2017, 05:43 PM   #32
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Quote:
Originally Posted by HDmac View Post
I have a stage 2 block, less than 10k miles right now and an analysis pending at blackstone labs. Hard cold starts this winter resulted in tons of piston slap and I get lots of ghost feedback knock (like -7 degrees or more) from what i'm assuming is the piston slap. Once the car is up to temp, the slap and ghost knock goes away unless its really cold (10f or colder). Didn't eat any oil after 3k miles on Motul 8100 x-cess 5w-40 though. Making 300whp right now but in a couple years i'd like to throw in a 1.5xtr and supporting mods. I'd be happy with 75k+ miles out of it. If I were to do it again i'd defiantly go with their 'Tuff' blocks for a tighter PTW.
Nice did you install it your shelf?
So your block is 95.5 bore?
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Old 02-23-2017, 06:01 PM   #33
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Quote:
Originally Posted by Squirtledasuby View Post
Nice did you install it your shelf?
So your block is 95.5 bore?
It is a 95.5 bore, no honing so a larger than necessary PTW.

I did not install it myself, one if IAG's contingencies for their warrenty is it needs to be professionally installed. Plus I didn't have the time to do it myself as its my only car.. stock motor spun a bearing on the dyno when I was having a boost issue checked out.
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Old 02-23-2017, 08:51 PM   #34
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Great post and good work on smart driving/mx.

I'd bet very few 'built' engines last much over 50,000 miles for various reasons.

I'm nearing 10,000 miles on my built engine-hoping for another 90,000 miles!

Thanks for posting.
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Old 02-24-2017, 04:57 PM   #35
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Quote:
Originally Posted by Squirtledasuby View Post
They have a similar block to this same cleareances. But request to run thicker oil.
10w40 it's whole life

Still debating what block to get.
Do you know anyone else running IAG blocks stage 1, and 2 and there experiences?
Thanks
So after a lot of research and talking to the guys at IAG I just ordered their Stage 1+ block.

Was originally going to go with the Stage 2 but the Stage 1+ has much tighter PTW clearance which means less blowby, less oil consumption and better longevity based on what the IAG guys told me. They said that unless I plan on going above 350 WHP, the stage 1+ is a better bet even though it costs the same as the stage 2.

If I was going to go for more WHP I would go with their stage 2 Tuff block because they use the tighter PTW clearance on that one. I just wasn't ready to spend that much more money for my '11 WRX.

Should be getting it next week and starting the install.
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Old 02-24-2017, 06:11 PM   #36
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I also ordered a stage 1 plus shortblock from IAG, but I asked them to put in high compression pistons in hehe. install within 2 weeks. I'll be running E85 almost exclusively and im getting my VF52 upgraded with a 20G compressor. I was debating with which stage to go with but I ended up with the stage 1 plus like what the OP said for less oil consumption and greater longevity. Kinda surprised about the 5k oil change intervals, everyone always swears by the 3k interval but if BS is backing it up then so be it right
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Old 02-24-2017, 06:29 PM   #37
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Quote:
Originally Posted by gsrcrxsi View Post
ARPs were an add-on
I've never heard of main line honing for ARP head studs. (Not the case bolts)

IAG did the full assembly. I trust they know what they are doing
I was just curious if they mentioned that for their assembly. IAG is GREAT. NO question there...
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Old 02-24-2017, 08:01 PM   #38
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Quote:
Originally Posted by Joe Bsaibes View Post
I also ordered a stage 1 plus shortblock from IAG, but I asked them to put in high compression pistons in hehe. install within 2 weeks. I'll be running E85 almost exclusively and im getting my VF52 upgraded with a 20G compressor. I was debating with which stage to go with but I ended up with the stage 1 plus like what the OP said for less oil consumption and greater longevity. Kinda surprised about the 5k oil change intervals, everyone always swears by the 3k interval but if BS is backing it up then so be it right
Nice!

Which high compression pistons did you ask for? I saw that they offered the Manley Platinum and the Cosworth.
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Old 02-25-2017, 01:28 AM   #39
Squirtledasuby
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Originally Posted by Sun&SnowWRX View Post
So after a lot of research and talking to the guys at IAG I just ordered their Stage 1+ block.

Was originally going to go with the Stage 2 but the Stage 1+ has much tighter PTW clearance which means less blowby, less oil consumption and better longevity based on what the IAG guys told me. They said that unless I plan on going above 350 WHP, the stage 1+ is a better bet even though it costs the same as the stage 2.

If I was going to go for more WHP I would go with their stage 2 Tuff block because they use the tighter PTW clearance on that one. I just wasn't ready to spend that much more money for my '11 WRX.

Should be getting it next week and starting the install.
I'm gonna run a outfront Motorsports block waiting for delivery. Same specs as yours and Manley pistons.
Can't wait!
Hope all goes well
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Old 02-27-2017, 12:44 AM   #40
Sun&SnowWRX
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Thanks!

If anyone is interested I'll post an update after install and break in.
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Old 02-27-2017, 10:08 AM   #41
gsrcrxsi
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Does anyone want to throw out some opinions on why only pistons 2 and 4 show that kind of skirt wear?

Or opinions on what you make of the bearing wear? Normal?
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Old 03-08-2017, 11:13 PM   #42
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Just a guess but running those tight piston to wall clearances doesn't leave any margin for error. Possible the driver bank ran a bit leaner. What kind of timing was being run? Advanced timing may have placed additional side loading on the pistons. Number 3 rod bearing might have succumbed to the one main feeding a pair of rods syndrome. Looks like it had a momentary loss of film strength resulting in some delaminating.

All in all, for 100k I'd say the innards looks good. Hats off to IAG.
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Old 06-13-2018, 12:36 PM   #43
tinkwithanr
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Bumping this for updates! Looking at getting either the stage 1+ or 2 'Tuff'.

How many miles do you have on the new build? Any regret not boring out to 99.75? Thanks for tracking the first build so well.
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Old 06-29-2018, 10:26 PM   #44
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You gonna learn today!
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Old 07-05-2018, 11:54 PM   #45
soulexodos
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Impressive! Hope my new block lasts that long
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Old 07-05-2018, 11:55 PM   #46
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Dont know if I want stage 2 tuff or normal stage 2.
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