fizzlefish Posted December 12, 2018 Share Posted December 12, 2018 So my 08 5eat has rod knock. So i talk someone down on a Ej257 long block with a few upgrades. Is it possible to use the EJ257 on a 5eat? This will be my first attempt at a full motor swap and pretty confident I can do it though not sure i can use the full long block. I have attached a photo of the mods on the motor. Link to comment Share on other sites More sharing options...
kzr750r1 Posted December 12, 2018 Share Posted December 12, 2018 All day long. Link to comment Share on other sites More sharing options...
fizzlefish Posted December 12, 2018 Author Share Posted December 12, 2018 All day long. Thanks. Picking it up this weekend with a buddy. Considering a larger turbo while im at it. Link to comment Share on other sites More sharing options...
fizzlefish Posted December 13, 2018 Author Share Posted December 13, 2018 Can I use the 257 heads? Im getting conflicting info. It is single AVCS EJ257 from a 07 STI. Link to comment Share on other sites More sharing options...
Max Capacity Posted December 13, 2018 Share Posted December 13, 2018 That was the one question I had. If it was dual AVCS it may be more work, to block them off. member "m sprank" would be the one to ask, PM him. http://people.csail.mit.edu/ilh/vacation/ There's the service manual if you need it. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
Berge56 Posted December 13, 2018 Share Posted December 13, 2018 Yes you can use the EJ257. In fact I believe the 05 and possibly the 06 OBXT's came with the EJ257. I also don't see why you couldn't use single AVCS sti heads. They are basically the same head that is on our cars. Like Max capacity said, if you were going from a single AVCS to a dual AVCS there would be more work as you need to block off the exhaust AVCS. Link to comment Share on other sites More sharing options...
kzr750r1 Posted December 13, 2018 Share Posted December 13, 2018 Depending on the health of your 5EAT you may want to decide on how far you push it. What are the goals of the car? If DD you may not want to go too big. 16G has been pretty good for my setup. Link to comment Share on other sites More sharing options...
fizzlefish Posted December 15, 2018 Author Share Posted December 15, 2018 Depending on the health of your 5EAT you may want to decide on how far you push it. What are the goals of the car? If DD you may not want to go too big. 16G has been pretty good for my setup. I'm not going overboard. It is a DD and because of the rod knock I needed to replace it and got a good deal. If I can get a bit extra out of it I might try but I am not pressed. As far as I can tell the 5eat is in good condition. Link to comment Share on other sites More sharing options...
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