Guest Posted September 1, 2009 Share Posted September 1, 2009 I'm not 100% about the pump, but the STi has slightly larger injectors. No, it doesn't. The injectors are the same (04-06 STI and 05-06 LGT, and AFAIK it's also the case for the 07+ top feeds).. Link to comment Share on other sites More sharing options...
mwiener2 Posted September 1, 2009 Share Posted September 1, 2009 STi has always been top feed and slightly larger than LGT sidefeed. Also, the LGT is a relatively new platform. Compare to the WRX or FXT and then you've got mostly apples to apples. Either way, the turbo and IC are different. edit: If my memory serves me correctly, the STi was 550cc and the LGT is 520cc.. but then they went changed everything each year. My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
atc5 Posted September 1, 2009 Share Posted September 1, 2009 STi has always been top feed . Wrong. 04-06 STi is sidefeed. Link to comment Share on other sites More sharing options...
mwiener2 Posted September 1, 2009 Share Posted September 1, 2009 are you sure? I coulda sworn Imprezza's went TF long before the Legacy went TF. I don't have access to my service manuals right now to check. My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
Guest Posted September 1, 2009 Share Posted September 1, 2009 STi has always been top feed and slightly larger than LGT sidefeed. Also, the LGT is a relatively new platform. Compare to the WRX or FXT and then you've got mostly apples to apples. Either way, the turbo and IC are different. edit: If my memory serves me correctly, the STi was 550cc and the LGT is 520cc.. but then they went changed everything each year. Mr. Weiner Expert is consistently wrong. USDM 04-06 STI are side feeds. The injectors are the same, they were just scaled differently in the ECU (520 vs. 550). Link to comment Share on other sites More sharing options...
rao Posted September 1, 2009 Share Posted September 1, 2009 So do the STI and Legacy have different engine parts? Rob IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
mwiener2 Posted September 1, 2009 Share Posted September 1, 2009 Internally, No. My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
rao Posted September 1, 2009 Share Posted September 1, 2009 Are you sure; I thought I read about a lot of differences. Rob IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
Guest Posted September 1, 2009 Share Posted September 1, 2009 Internally, No. Depends on the year. 07+ are different internally as well. Link to comment Share on other sites More sharing options...
rao Posted September 1, 2009 Share Posted September 1, 2009 I thought the STI was a lot different than the Legacy. How can they have the same parts??? Rob IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
mwiener2 Posted September 1, 2009 Share Posted September 1, 2009 Depends on the year. 07+ are different internally as well. They added the air pump and dual AVCS. forgot about that. I get stuck in 05 world alot. My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
Guest Posted September 1, 2009 Share Posted September 1, 2009 They added the air pump and dual AVCS. forgot about that Eh, no. 07 STI also has air pump. Dual AVCS came in 08. 07 has different heads and compression. 07-09 LGT shares longblock with 06-07 WRX. Link to comment Share on other sites More sharing options...
captainhook Posted September 1, 2009 Share Posted September 1, 2009 /\ Yikes, this man is knowledgeable! Link to comment Share on other sites More sharing options...
ShadowImg Posted September 1, 2009 Share Posted September 1, 2009 Eh, no. 07 STI also has air pump. Dual AVCS came in 08. 07 has different heads and compression. 07-09 LGT shares longblock with 06-07 WRX. My 08 LGT has an air pump too. Link to comment Share on other sites More sharing options...
captainhook Posted September 1, 2009 Share Posted September 1, 2009 My 08 LGT has an air pump too. Yeah, mine is annoying to listen to at startup. I know some place sells a delete kit, but I'm not sure what all is involved. Link to comment Share on other sites More sharing options...
Guest heightsgtltd Posted September 1, 2009 Share Posted September 1, 2009 We need to name what Rao does the "Rao trap" Link to comment Share on other sites More sharing options...
Mr. Ed Posted September 1, 2009 Share Posted September 1, 2009 where do the oil pump issues come into play? and why is it no one has pics of this stuff that is going on? i'm going to see what I can do about getting some pics. (oil starvation issues/oil pump failures bypass valves sticking etc) Link to comment Share on other sites More sharing options...
Rick D. Posted September 1, 2009 Share Posted September 1, 2009 Ok, so without re-reading this whole thing, there was some discussion a simple air filter and/or muffler would render the engine harm if driven 9/10ths. I pulled up hard on plans for both until I got to thinking about it last night. I just want someone to confirm that's true. It doesn't ring right to me that a manufacturer would cut it that close. It is important to me since I do run hard up a mountain. And, I intend to keep this another five years and 60K miles. I do know turbos are more finicky, but geesh, an air cleaner and muffler change??? Help me understand this.... Link to comment Share on other sites More sharing options...
mwiener2 Posted September 1, 2009 Share Posted September 1, 2009 Eh, no. 07 STI also has air pump. Dual AVCS came in 08. 07 has different heads and compression. 07-09 LGT shares longblock with 06-07 WRX. according to Cars101.com, compression ratio is the same across all 2.5T's for each model year My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
Guest Posted September 1, 2009 Share Posted September 1, 2009 according to Cars101.com, compression ratio is the same across all 2.5T's for each model year cars101.com is ridden with inaccuracies. FSM contains correct info. 06+ WRX and 07+ LGT have 8.4:1 compression ratio, vs. 8.2:1 on 04-06 STI and 04-06 LGT. Link to comment Share on other sites More sharing options...
rao Posted September 1, 2009 Share Posted September 1, 2009 So the cars do share some of the same parts? I though they were different. Rob IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
Mr. Ed Posted September 1, 2009 Share Posted September 1, 2009 So the cars do share some of the same parts? I though they were different. it's hit or miss. some are the same parts ... and other parts are different. like oil pumps... the 09 sti has a different part number than the 09 lgt weird stuff i tell ya Link to comment Share on other sites More sharing options...
Gire Posted September 1, 2009 Share Posted September 1, 2009 We need to name what Rao does the "Rao trap" He's crafty, I'll give him that. Link to comment Share on other sites More sharing options...
mwiener2 Posted September 1, 2009 Share Posted September 1, 2009 cars101.com is ridden with inaccuracies. FSM contains correct info. 06+ WRX and 07+ LGT have 8.4:1 compression ratio, vs. 8.2:1 on 04-06 STI and 04-06 LGT. So... 05 LGT and STi are 8.2:1 (no 2.5T wrx) 06 LGT and STi are 8.2:1 (first year 2.5T WRX, you say 8.4:1) 07 LGT, WRX, and STi are 8.4:1 08 LGT, WRX, and STi are 8.4:1 The only one that's not the same per model year is the 06 WRX which you say is 8.4 while the others are 8.2... I think that's wrong. And there isn't a USDM 04 LGT So you repeated what I said but in a different way that made it look like I was wrong. So basically you don't really know either, you're just using a different source than me that may or may not be any more accurate. My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
Gire Posted September 1, 2009 Share Posted September 1, 2009 I saw that one, weiner! I was gonna scold ya for being such a meanie! Link to comment Share on other sites More sharing options...
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