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2000 RSTi
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oof. Sorry man.
 

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2000 RS Coupe
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113 Posts
Discussion Starter · #82 ·
Quick update. Nick @ JDM Racing Motors was very accomodating despite the engine being past the warranty period. Due to the nature of the damage, he offered a replacement engine or partial refund to go toward repair. I opted for the partial refund, as the motor is completely disassembled at this point, and all the other engine components seem to be in good working order. I ordered an new OEM shortblock so it will have a fresh bottom end.

In other news, I painted the intake manifold STI red!

 

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2000 RS Coupe
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113 Posts
Discussion Starter · #84 ·
The build is taking an interesting turn. I got an EJ257 2018 STI RA shortblock (10103AD020). The heads are off at IAG getting a bath and the 2.5l combustion chamber modification. This is becoming an EJ257/205 hybrid build!



p.s. Anyone want to buy a JDM EJ205 shortblock that needs machine work?
 

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Man that's sick. I can only imagine the torque with that short block and the JDM heads. Might have to go that route someday.
 
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Discussion Starter · #89 ·
I finally got the heads back from IAG. IAG's machining is fairly expensive and backlogged, but the work they did is impressive. I had them modify the combustion chamber for 2.5L. This opens up the area around the valves to maintain proper compression and prevent detonation which is common on hybrid builds. I also had the heads resurfaced, a valve job performed with new OEM valves, and had the casings vapor hone cleaned. They look brand spanking new. Despite the fact that I picked them up locally, they were packaged obscenely well.





 

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Discussion Starter · #91 · (Edited)
Heads are on and torqued to spec. I added an 11mm OEM oil pump, Aisin water pump, and installed the water/breather pipe. Next I'll set the valve lash, install cams and avcs solenoids, then put in the spark plugs and start adding back on all the little pieces. I'm also debating what to do with the turbo. The engine came with a TD04HL which is supposedly a hair bigger than the USDM 02 WRX's TD04-13T. Both are considered too small for the EJ257 according to opinions on NASIOC. I am considering upgrading to a VF48 or similar sized turbo, but that's another $400-1000 (used or new) for a project that is already waayyyy over budget. I could upgrade the turbo at a later date, but that would require another re-tune. Thoughts?

 

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Discussion Starter · #94 ·
Some more progress photos. Installed the intake manifold with IAG TGV deletes and a new OEM coolant tank. I debated using the metal one that came with the tank, but the o-ring that goes between the tank and lid isn't sold by its self, and the lid was starting to rust on the inside anyways. I also upgraded the injectors to STI dark blue 565cc ones. I painted the exhaust manifold with black and silver header paint. I'm still waiting on new buckets to set the valve clearance but they should be in tomorrow. I decided to replace the shim-on-bucket lifters with shimless ones for extra insurance.

@bue car @Ayanamieve I'm most likely going to upgrade the turbo to a VF48 Hi Flow, unless I can find a cheap used VF48 locally. Lots of them floating around, just gotta look out for the ones with wastegate cracks. Probably going to ditch the catted up-pipe for an aftermarket as well. At this point I feel like I should have just built this thing from scratch from the get go...



 

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#32
95 Coupe, 95 Sedan & 95 Wagon
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I was thinking a 18-20G turbo, stock location.

And yes, 100% remove the catted up pipe, Subaru did due to failures, when the cat breaks up, kills the turbo and possibly more. It's not even about the performance at this point, save your hard work.
 

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2000 RS Coupe
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113 Posts
Discussion Starter · #96 ·
Well I finally figured out what was causing the shifting issues I was having. It turns out I put the shifter stay bushing washer on backwards. The spring retainer tab on the washer was interfering with the shift linkage during shifts.

Backwards:


Correct:


I actually had the entire engine out to diagnose the shifting issue thinking there may be some issue with the way that I installed the clutch originally. I suppose I should have checked the linkage first! :LOL: Now that the engine is out I figured I should just leave it out so I can prep the engine bay for the swap. I have an 04 STI crossmember on the way as well as a GD radiator and fans. I'll be gathering the other necessary parts in the coming weeks. I also have a VF48 Hi Flow on order, but its backordered until August :cry:



 

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I see on both your motors you have light weight crank pulleys... seems to be no definitive answer as to whether these can possible damage our engines ( I have one on one of the cars- did much research before hand ) - obviously your in the no harm camp .
 

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Discussion Starter · #100 ·
Yeah I ran lightweight crank, power steering, and alternator pullies on the EJ251 since 2014 with no ill effect. Just popped a P0420 every now and then, but it was probably O2 sensor related. I selected the Grimmspeed for the new engine because it is a little heavier than the Perrin. From the Grimmspeed product page:

Based on our analysis, the OEM crank pulley does not act as a harmonic damper found on for example traditional V8 engine dampers. The elastomer portion of the pulley helps dampen some noise from the engine accessories (ie. alternator, PS pump, and A/C compressor) but in our experience, the increase in this noise is in-perceivable.
 
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