It's a hollow tube that connects all the runners, it's what's supposed to pull the gasses from your crankcase from the pcv port. They all have it.

Oh ok, never noticed, the 1g intake looks like it curls in more.

Can you remove it?

Ya the 1g manifold has longer runners and thicker casting.

It could be removed but it would be a LOT of work. I tap the end of the rail and use it for a hidden vac source.

Cool, that's a good idea!!

So the head is now torn down, about half my valve stem seals were leaking, the seals are hard as rock and crunchy, they've never been changed to my knowledge with 150k miles on the car, long over due.





The valves themselves were in pretty good conditions, I cleaned them all and lapped them all in their respective seats, also pretty good for their mileage, no pitting, just dirty.

Cleaned it all and started to reassemble and found I received the wrong valve stem seals, so it'll be a couple days before I get the right ones. Then I'll get the new springs & retainers in along with the GSC S2 cams.

I spent a week or so tearing down the bay and cleaning it up and as of yesterday it's all primed and ready for some color.

Nice work Jason, what colour you going with? Special type of paint?

Nice work indeed Jason! Were you burning visible oil with those dry stem seals? The reason i ask as i have 200,000 miles on mine & no signs of smoke as of yet

OEM color, Dupont Cromax pro base and clear.



I had a small puff on start-up and when the car idled for a while. The valves affected were noticeably tarnished by oil running down them.

What springs and retainers are you throwing in? Is that all your doing for the head, no machining or anything?

It's just getting a set of Evo 8 springs/retainers. No machining other than the lapping I did. It's still flat, seats are good and polished up nice with the lapping. I also don't plan to be revving this to the moon on the stock bottom end.

Ok cool, am hoping to do something similar with the head I have sitting on my work bench but it has a bent valve, wasn't sure if I can just swap it and lap it or if I needed to take it to the shop.

Bent valves mean your guides need inspection and likely replacement.

Thanks Mike, I will be sure to get that done before putting everything back together.

Got the correct valve stem seals today so the head is now fully assembled.

Locked down and ready to install keepers Total time to install all the springs/keepers/retainers was under 20 minutes.





GSC S2 cams installed.



One little downfall with the spring compressor is I found out the tube I used is slightly too large for the smaller Evo retainers, no big deal though, just used an old valve seat and it works perfect.

Got the Barcelona red laid down today

Just an afternoon project, no big deal.

Damn jay I thought the 2g was impeccably clean before ...guess I was wrong

Very impressive progress as usual Jason. Looks like you are reusing rocker arm on this build. I heard good things about evo aluminum rocker arm MD375091. Price adds up quite a bit when buying all 16 of those.

Pretty well ready to drop in the motor, probably going to happen later today.



I've also known my SBR manifold has been cracked(notorious) for a year or 2 but now has developed into 2 cracks so I decided to take care of it. This tig is so handy

I blasted the cracked areas then ground out and drilled the ends of the cracks, preheated it and welded it and returned it to the oven to cool over a couple hours. Time will tell how long it holds. If it fails I may just build my own manifold.





Re-coated.

Looks good Jason, hopefully she holds.

Motor is now back in, power steering and all



She'll hopefully be running tonight.

You really do some nice work Jason

Lighting fast progress I don't even want to look at my engine bay after yours

I only had to threaten to sell the damn thing 3 or 4 times today but she's alive. Somehow, somewhere there's a break in one the outputs from the PTU to one of the coil packs. After changing out every part possible that could cause lack of spark on cylinders 2&3 I tracked it down to the wiring and where in the wiring and it doesn't sound like a Subaru anymore. Guess the wiring harness is probably just getting old and brittle and has been moved around one too many times.

Enough said, lets listen to thos GSC S2's rumble!

Looks good Jay!! Was the side exit open?

No I didn't have the downpipe on yet.

Oh haha, sounded a little like an exhaust leak

Here's a better idle video

Now lets see some launches while preloading!

I like GSC S2's idle a lot more than your previous setup.
Idle is defiantly smoother compared to before:



I do like the "No low end power is lost vs the stock cams" That alone is good enough reason for me to upgrade.

Here is a full description for GSC S2's

S2's and the hx35 were by far my favourite street setup. Still had good bottom end, would spool up quickly and had awesome airflow all the way through to 8k rpm.

Good mid power band, while maintaining that "big turbo" feeling (delayed spool and loud spool) but still hit hard and early enough to not feel laggy.

Jason,
Any issues with high rpm at cold idle after switching to EVO 3 IM?
The reason i asked is this:



Evo 3 IM vs Stock 2G - Install by Ryan L

Not at all, if anything I have to give it gas to keep it running for the first 15-20 seconds as I have the FIAV closed internally.

I managed to get out to the track one last time for the year, it was cold but sunny and I couldn't resist one more chance at the 1320. I'll be installing a staging brake over the winter to try to get these 60' times in check.

Pulled off my best ET of the year and MPH.

Congrats Jason You made some impressive times and drove her home on her own wheels. Sounds like you all set for your winter projects.

Nice work Jason, what is that beside you?

A 10 second Mustang.

Good work Jason.

I really like what you've done with the car