STi swap
- Thread starter Acky
- Start date
Mark
Active member
is your ej20 dying?
2point5RS_Dan
HATER DAN
A gearbox.
Yeah, it ran fine sunday did a 240mile trip and monday was fine on my way to work, then got the oil changed tuesday ran fine before the change, and started sounding like the internals were eating itself within 5miles of the change, it has oil and isn't leaking so im not to sure, so its sitting at a shop. Thinking about throwing in either a sti longblock or 2.5hybrid, depending on how messed up the top end is. Second ej20, I must be the Dan of engines haha.
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drvsdwz
DRiVe SiDeWayZ
no, that would be natesti actually, I can't remember how many he went through
Ryan
New member
The Built Motor section over on NASIOC has a lot of info on this. I recommend checking it out.
The "Hybrid" involves the STI shortblock while still using your EJ20 heads. But it's not as easy as just bolting the heads on and calling it a day. The heads will likely need to be checked, serviced, and also I highly recommended getting the CC machined to match the 2.5 bore. Obviously, if you want to do a full STI swap, you would need to swap over all the electronics, etc. etc.
You will need at least stock STI injectors, STI oil pump, and upgraded fuel pump. Other stuff you SHOULD swap out while you're in there include water pump, thermostat, timing belt, STI oil pan, baffle, pickup. You also should be running at least a VF series turbo as well. The stock TD04 is too restrictive for the 2.5.
In a nut shell, it's not cheap. Like I said check the stickies in the NASIOC Built Motor section. It also comes down to your power goals...
The "Hybrid" involves the STI shortblock while still using your EJ20 heads. But it's not as easy as just bolting the heads on and calling it a day. The heads will likely need to be checked, serviced, and also I highly recommended getting the CC machined to match the 2.5 bore. Obviously, if you want to do a full STI swap, you would need to swap over all the electronics, etc. etc.
You will need at least stock STI injectors, STI oil pump, and upgraded fuel pump. Other stuff you SHOULD swap out while you're in there include water pump, thermostat, timing belt, STI oil pan, baffle, pickup. You also should be running at least a VF series turbo as well. The stock TD04 is too restrictive for the 2.5.
In a nut shell, it's not cheap. Like I said check the stickies in the NASIOC Built Motor section. It also comes down to your power goals...
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Meyagi
I'm a hack
you can use avcs heads from a 2.5 forester or legacy turbo, or a sti and just leave the avcs unhooked and get tuned on the factory ecu. ive done 2 cars that way so far with really good results
Meyagi
I'm a hack
between 500 and 800 depending