900whp Subaru teardown!

Dave finds some interesting stuff as he inspects the heads and parts on this 900whp Subaru that came in after another shop refreshed it. After only 6 hits on the dyno this head already needs some love from HeadGames.

[@scoobyspt7]

Headgames is the only company that will ever touch my heads.. Dave is a book of knowledge! 🤘

[@headgames]

Thank you so much!

[@saki10man]

@headgames Does the black nitride valves from GSC come black or silver in color?

[@headgames]

@@saki10man it’s in the name of”black” nitride” is the color. But that is a supertech thing not a gsc thing.

[@ICTPerformance268]

🇦🇬 Another ⭐️⭐️⭐️⭐️⭐️ episode, as usual. 🙇🏾‍♂️

[@headgames]

thank you!

[@pab3783]

👍as usual

[@georgedreisch2662]

Thinkin’ that for the intake valve oiling, whoever needs to look at engine / crankcase ventilation and blow by, and the turbo plumbing. Seems to be a general lack of a systemic approach to the build of those heads, in the first place.

[@miquelanesto1762]

The most important is they didn't do the head gasket delete

[@headgames]

hahahaha 🤣

[@DosoBoiz67kPerfomance]

@11:52 the exhale 😂

[@headgames]

You feel my sorrow!

[@ALKATRAZ99]

great video!

[@headgames]

thank you sir!

[@Otto_Factory]

Its so wild you would take such an expensive part and have the half-ass shipping render them useless 😔

[@headgames]

People don’t understand how to ship

[@black95awdtsi]

Interesting to see rust on the valve springs. I wonder if the valves were media blasted, that removed a coating or affected the heat treat that resulted in a lower spring force.

[@headgames]

Valves getting blasted not an issue. Rust on a spring is bad.

[@black95awdtsi]

@@headgames I meant, I wonder if the valve SPRINGS were media blasted. That might allow the rust. In your experience, is it common for engines running ethanol to cause internal components to rust?

[@MinhDangcraft]

Amazing video as usual! Makes me wonder if the people on forums were just having valve float blow up their motors versus GSC "eating" their buckets/wiping buckets. Another question for you Dave, would you recommend titanium retainers for street use?

[@headgames]

Valve float or not clearancing the head for cams. Ti for street use is perfectly fine if the spring is happy. We have had heads come back from almost a decade of abuse with Ti retainers, no problems. Usually the spring wears before the retainer does.

[@MinhDangcraft]

@@headgames Legendary advice, thank you for dispelling that myth Dave love your work!!!

[@headgames]

@@MinhDangcraft if you check out 2 videos from about a year ago on “DLC coated buckets” or “billet cans” is me talking about it on the 2JZ platform. I go in depth

[@alexiegomez1691]

Always awesome information! God bless.

[@headgames]

thanks!

[@markdiloreto3773]

Hey Dave! Hope your cat is doing well. If moisture in the oil from running E85 will cause the valve springs to rust. Do you have a recommend valve coating, more frequent oil changes or another remedy based on your experience?

[@headgames]

more oil changes. it gets contaminated.

[@chrispetty5058]

Could carbon on the intake valve come from lack of a catch can or leaking turbo?

[@headgames]

yes sir!

[@CJ5EVOLUTION]

I heard that a wrongly assembled Subaru engine tends to move, distord, can this be seen on the cylinder head, like fretting or rubbing marks, on the cylinder head studs.

[@headgames]

I have never heard of such a thing

[@CJ5EVOLUTION]

Look at Moto IQ why Subaru engines blow up

[@slfrules1]

How do you feel about the VK56 head vs other v8 heads out there? A VK56DE built for big revs and boost has been my dream build since i watched Smokey Nagata do it big with the VK45. I saw a vk56de get disassembled due to neglect once and the bottom end looks way stout with the semi closed deck and skirted 4 bolt + T's with decent register area. With a 1.68:1 rod/stroke should be set to spin. Do the heads have potential like the block seems to?

[@headgames]

I’m not familiar with that engine. I’ve heard it’s similar to the VQ which we have went well into the 6’s and set world records with. I guess it depends on how much power you want to make. The block looks stout on the vq but it takes a billet oil pan and a lot of other expensive parts to make more than 1500whp

[@slfrules1]

Thank you for the insight! I've been told by a coworker who was involved in some serious VQ development in FL that it takes the Dailey sump set up or a Mazworx's billet block to keep them from splitting. That really pooped on my realistic 10 year plan. It's great to hear the VK heads should be units. 5 Titans chilling in the scrap yard few miles away

[@headgames]

@@slfrules1 yes, it’s a good amount of work to make them live.

[@1VIPWRX]

😟