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Old 10-12-2004, 01:57 PM   #1
STIdreamer17
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I was wondering how many pounds of boost can i safely run a 2.2t with stock internals, 3" exhast piping, and a wrx intercooler?
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Old 10-12-2004, 02:01 PM   #2
Matt Monson
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25psi or so. You are going to need bigger injectors and engine management, stiffer valve springs, not to mention a much larger than stock turbo. The block is not the limiting factor here. There are a number of members here who have 20+psi builds using stock internals on their block. And BTW, it is a little known fact but the SOHC EJ22T heads flow better than the USDM EJ205 heads do...
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Old 10-12-2004, 09:23 PM   #3
STIdreamer17
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i mean how much can i run if i leave it stock for right now??
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Old 10-13-2004, 01:12 AM   #4
subiekid
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rbh5 = weak sauce. is it 14psi when it starts to make out?
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Old 10-13-2004, 02:09 AM   #5
biggreen96
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well stock means no FCD right? fuel cut is 13.something psi
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Old 10-13-2004, 03:37 AM   #6
subiekid
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Quote:
Originally Posted by biggreen96
well stock means no FCD right? fuel cut is 13.something psi

I think VRG3 made something to get around that. I dont pay attention to that stuff much.
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Old 10-13-2004, 07:12 AM   #7
STIdreamer17
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so i can run about 12 lbs of psi safely right now??
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Old 10-13-2004, 11:04 AM   #8
biggreen96
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Old 10-13-2004, 01:16 PM   #9
STIdreamer17
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ok thanks thats what i wanted to know, and Matt im sorry that im a newbie and was told that to put 2.5 heads on would be good for the car. no need to give me any grief about it.
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Old 10-13-2004, 02:13 PM   #10
Matt Monson
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Quote:
Originally Posted by STIdreamer17
ok thanks thats what i wanted to know, and Matt im sorry that im a newbie and was told that to put 2.5 heads on would be good for the car. no need to give me any grief about it.
Whoa cowboy! No need to get all defensive. I look at a thread like a group of guys sitting around a table and sharing their thoughts, with the thread starter as a kind of chairperson. Unless I quote you and directly address you I am just sharing knowledge and making no assumptions or assertions about you or your knowledge level. If I think you are acting like a dumbarse, I will say so directly Otherwise, don't take things so personally. I don't look down on noobs becuase they are new. I wasn't born with a wealth of knowledge of things Subby and am more than happy to help answer educated questions. And threads with what I consider stupid questions usually just get ignored...

What I mentioned about the EJ205 heads is not known by very many people, so I have been making an effort to let people know that they can make fairly big power with their stock heads and don't need to go to the trouble and expensive of getting WRX heads.

You mention the EJ251 heads. Those are a totally different situation. Those heads significantly outflow the stock heads and would be a worthwhile upgrade, and would address the fuel rail/injector issue at the same time. But they aren't worth it until you have addressed the other supporting mods that have been spoken of.

As for where the rest of this discussion has gone: The stock fuel cut is set at 12.5 psi. You can try making the DIY one that is mentioned on LegacyCentral or you can buy an MRT one that plugs right in for $75 from Rennick Subaru in SoCal. I personally wouldn't go past 12 psi without an intercooler. If you get an intercooler in there, then 14-15 psi is feasible. 16 psi is about the max you would want to go on the stock turbo as efficiency drops way off after that and your EGT's will go up substantially.
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Old 10-13-2004, 03:48 PM   #11
STIdreamer17
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oh ok, i miss understood you then, i apologize. i have a wrx intercooler on it now, but it seems to be giving me trouble, i think it is either clogued or there is a leak somewhere. thats why i wasnt upgrading anything just yet, i need to get the car running right before i go to bigger things. i thought you were addressing me on another post that i posted about the heads.
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Old 10-13-2004, 03:52 PM   #12
Matt Monson
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'73 914 and 2012 BRZ

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no worry beef curry. I prefer to see things stay friendly and helpful...
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