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Old 10-09-2012, 08:25 PM   #1
93GC8AWD
Scooby Specialist
 
Member#: 245268
Join Date: Apr 2010
Chapter/Region: TXIC
Location: Arlington, Tx
Vehicle:
1993 Impreza L Wagon
Blue

Default Little Help With My Lego Swap

I have recently purchased a 92 legacy ss. I'm pulling the motor for a rebuild. But before I start, I was going to keep things simple and use a set of 2.5 dohc heads and a td04 turbo. Should I purchase a 2.5 dohc timing kit? I'm honestly only looking for around 250-300 HP.
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Old 10-11-2012, 06:42 PM   #2
DohcEj22e
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Member#: 289011
Join Date: Jul 2011
Default

Yes, you must purchase the EJ25D timing kit since you have pretty much adopted that setup when you converted to DOHC heads. Make sure you use the 97-99 EJ25D heads as their chambers are well enclosed in the EJ22T bores.

Also, the passenger side head must be tapped for the turbo & since you're converting from single to DOHC, you may as well get an 11mm STi oil pump (to compensate for the increased room in the heads) & a new turbo water pump as well as new tensioner & timing belt pulleys.

Set the timing as you would an EJ25D & it will start right up. The crank pulley, crank, & cam sensors will be the same & your ECU will run those heads. You WILL have a decreased compression ratio though but that will allow you more room for boost.
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