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You’d be fine on the 11m pump, that said, the upgraded one from iag is cheap enough and a good option for sure. It wasn’t around when mine was built lol. Killer b also has some good data on the oem pumps, idk if they have any on iag modified ones though.
 
owns 2006 Subaru STi
I would upgrade the pump and oil pickup, because you will be increasing oil flow demand you will be safer with the stg 2 oil pump. No need risking oil starvation for $100 price difference.

Congrats on the Tuff block!
Why are we assuming the oil flow demand has increased without knowing what bearing tolerances are being run? Unnecessarily increasing oil flow does nothing but hit the bypass pressure at at lower RPM, causing the oil to spend more time in bypass and heating it up. Larger pumps will also cavitate more easily.

IMO the actual answer is to ask the engine builder (IAG) along with any other mods and info OP can supply to them. Slapping on a bigger pump with no data to suggest pressure is low will do nothing.
 
Why are we assuming the oil flow demand has increased without knowing what bearing tolerances are being run? Unnecessarily increasing oil flow does nothing but hit the bypass pressure at at lower RPM, causing the oil to spend more time in bypass and heating it up. Larger pumps will also cavitate more easily.

IMO the actual answer is to ask the engine builder (IAG) along with any other mods and info OP can supply to them. Slapping on a bigger pump with no data to suggest pressure is low will do nothing.
That's good to know which I can apply to my build as well. Thought was taking into account there will be an HP increase there would be a requirement for increased oil flow on the motor. Wasn't an assumption but my thought process.

Thanks....
 
Discussion starter · #28 ·
Before I spun a bearing, I was sitting at ~350whp/385tq on E85 with pretty much every bolt on on stock turbo.

With the stage 2 tuff block going in, I am only adding TGV deletes, air pump deletes and fuel rails/lines. I don’t plan on hitting 400whp so I’m thinking the OEM 11mm Oil pump should be fine. I was having doubts because IAGs site recommenda their Stage 2 CNC version for this block:

I would rather used those $450 towards labor costs. Let me know what you guys think..
 
Before I spun a bearing, I was sitting at ~350whp/385tq on E85 with pretty much every bolt on on stock turbo.

With the stage 2 tuff block going in, I am only adding TGV deletes, air pump deletes and fuel rails/lines. I don’t plan on hitting 400whp so I’m thinking the OEM 11mm Oil pump should be fine. I was having doubts because IAGs site recommenda their Stage 2 CNC version for this block:

I would rather used those $450 towards labor costs. Let me know what you guys think..
Nothing against IAG but it's a very tidy solution for them to have just what you need when selling a short block for another $450. I'd suggest watching all of Flatirons Tuning's videos on subaru oil pumps and make your decision. The only reason 10mm, 11mm, and 12mm pump versions exist is oiling system changes. 11mm was added for dual AVCS and 12mm for the twin turbo legacy. Both of those scenarios added places oil had to be sent to. Not horsepower related.



 
^that

and of course iag will push their own product lol. They suggested the 11mm for minebefore theirs came out. Maybe theirs are better, but the 11mm works just fine.
 
I wouldn't go with Outfront or IAG, I'd probably go with Rallispec if I needed a build.

I wouldn't get IAG anything, after email responses I've gotten from them, but specifically wouldn't get a shortblock based on there recommended engine break-in procedure.
 
I wouldn't go with Outfront or IAG, I'd probably go with Rallispec if I needed a build.

I wouldn't get IAG anything, after email responses I've gotten from them, but specifically wouldn't get a shortblock based on there recommended engine break-in procedure.
Alright, lets here it. Why dont you like their engine break in procedure?

Hope you brought your fire suit, you probably going to catch alot of heat :D
 
Alright, lets here it. Why dont you like their engine break in procedure?

Hope you brought your fire suit, you probably going to catch alot of heat :D
^that lol. Idk why you’d say no to two of the top engine builders in the Subaru world, who have made some of the fastest Subarus that have been around…..based on phone calls and a break in procedure lol
 
owns 2006 Subaru STi
Lol well I won't engage in any more break-in arguments; especially with IAG fan-boys, but I wouldn't break-in an engine like they describe and if a warranty depends on it, I'd pass personally.

Just because they built engines in "some of the fastest subarus" doesn't mean sh*t to me, I've heard plenty of negative from them. And yes, if you reply to me like a douche; I take that into consideration, and it wasn't phone calls.

I will add that I haven't heard as much negatives about Outfront, or anything much that I can recall, I'd pick Rallispec over them based on their location and from discussions with them, they know their stuff for sure, unlike people constantly regurgitating BS on these forums.
 
Seems to me that IAG is really specific about pre priming the engine multiple times and different ways. Thats a good thing. They also have multiple scheduled and specific interval oil changes, again another good thing. If I spent the big bucks on an engine, whats a couple of hundred dollars in oil changes to make sure it has a fighting chance in the long run. The only thing im curious about is why use 10w40. Why not use something thinner and lighter like 0w40 for the first couple of start ups and break in miles. Just something that will have very quick flow in cold temps. Just my thoughts, im no engine builder/engineer.

Magma, not sure if you're referring to me or not but im not an IAG fan boy by any means. I dont have a single one of their products on my car, atleast not yet lol. Many people opt to get IAG over most other blocks. That means less are getting the Outfront blocks. Why... well there are many reasons but partly because they literally advertise their products a certain way thats very appealing. Another huge factor is that they advertise a warranty with their engines. You forget, IAG has very good marketing and media team. How could any business that's as big as they are not. They make it so easy to feel safe and secured about spending money with them. Its pretty easy for something to get lost in the sea of popularity nowadays considering that the internet litterally flashes thing in front of your eyes the second you hit the search button. Lets put it this way, IAG has made it a point to be a house hold name in the subie world just like Cobb. Cough cough, another big company with a great marketing team.

If you had some bad business dealings with them, then thats understandable. No one that spends the big bucks on an engine should get less than stellar customer service. However, we weren't there or involved. It was just you, them, and an unknown situation to us.

PS, if you dont like their engine break in procedure, then dont follow it. Who cares, its your money anyways right? Their break in procedure is only if you want to file a claim under their warranty period.
 
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