Rising to Glory: The HeadGames EJ25 CNC head build-Up process unveiled

Dave shows us what goes into the process of making an EJ25 head ready for boosted beatings!

[@markdiloreto3773]

Great description on sharp edges and how they disrupt the boundary layer of flow creating more turbulence and collecting heat!

[@CJ5EVOLUTION]

The finish product looks awesome

[@headgames]

Thanks!

[@kyle_mulholland]

Can’t wait to make some power, thanks for everything!

[@samerca1]

Your videos are a great overview of the processes that you guys employ. I especially like how you explain the topic. Would love to see some content around Honda H and F series engines/cylinder heads.

[@headgames]

Either of those are rare birds around here. Maybe a B

[@ICTPerformance268]

🇦🇬 ⭐️⭐️⭐️⭐️⭐️, as usual. 🙇🏾‍♂️

[@brian6029]

Some good information in this 1. Nice camera angles too. 😎👍👍

[@headgames]

Thanks!

[@highpsiguy4085]

Loving these late night videos. Perfect timing! I would love to see some more 4g63 content. Ive watched all the past videos you have posted as far as I know. Id also love to know how to get a quote for my personal 4g63 head. Thank you Dave!

[@headgames]

Email me

[@headgames]

[e-mail]

[@headgames]

Maybe we will use your head for the vid!

[@highpsiguy4085]

@@headgames I would be honored

[@raindeergames6104]

These videos are just awesome. Is a smooth(almost shiney) suface finish always desired for a boosted setup in die combustion chambers?

[@headgames]

thanks for the kind words and watching! Almost shiny is really never a desired surface finish. 80 grit at most on the intake, 120 on the exhaust and chamber. Any more than that is just a waste of time and potentially hurts it.

[@khemrajhsamaroo3671]

Do you have to freeze the valve guides before install ? Also what lubricants do you use when installing them....great vids btw, learnt so much from you guys

[@headgames]

We do freeze the guides! We use press fit lube from Goodson to install them. Thanks for watching!

[@krisortega9431]

On the D25 heads, in the combustion chamber, removing the material around the valves(there’s a lip) will it improve flow? And have you done a before and after test.

[@headgames]

Improves low lift flow and reduces detonation. Great question! After 500whp it really helps.

[@Midnight.Fabrication]

How much would i be looking at for an identical set of heads? Dual avcs. Full cnc + hand finished port. Gsc s2 cams and appropriate springs for 9krpm. Oem size valves whatever you recommend. + shipping to New Zealand

[@headgames]

Best to email so we can discuss the details. [e-mail]

[@wyattoutlaw2370]

Are the fins meant to have a blunt edge? … but it’s still quite a fine edge just not sharp right?

[@headgames]

We blunt them, not a fine edge afterwards.

[@saki10man]

@headgames Dave would using a 5073 spring kit be enough and reliable for 550+ on a s1? Or 5076?

[@headgames]

We use the 5076 for 500-700whp so you have more cushion for the pushing. Check out our power pak 2 for that power. Helpful hints helping you with valvetrain selection. cdn.shopify.com/s/files/1/0725/1676/3953/files/001-Subaru_EJ-Powerpak2.pdf?v=1697043901

[@saki10man]

@@headgames yep that’s what I am looking for. Just waiting on a couple items and then bringing the heads in. 👍🏾

[@MrBilly334]

Have u any Honda j serie

[@headgames]

Seen one. Never did anything with it.

[@jamesbaker429]

700 hp from a four pot boxer engine,two litre who needs a V8?