OST-048: Спасибо товарищ Сталин

[oldeskewltoy]

As to the title....









While I've seen a few poor smallport castings.... this one is a pretty good casting, with decent chambers, and pretty good port-bowl alignment. What it doesn't have is a good short radius..... on ALL of the bowls....





more to come....

[aukword1]

lol had to google translate that title. Interested to see how this smallport comes out

[oldeskewltoy]

I'll bite WTF does thanking Stalin for your happy childhood have to do with this? Try to avoid sniffing solvent my friend mg:

In one of the email correspondences with this client..... "On my Cyrillic Russian keyboard when I typed "Спасибо товарищ" [thank you comrade] the next word suggestion that came up was "Сталин" [Stalin] looks like my phone is a cold war veteran & a good party member!"


more to come.....

[oldeskewltoy]

working the short radius, and the port walls....




and further progress....




more to come.....

[oldeskewltoy]

Been a bit of a busy beaver......

Ports are almost done - ITB adapter AND this heads new Cat cams should arrive later this week





Intake bowls/seats are set, and the chambers deshrouded




and I've begun the exhaust side





and a bit closer (more detailed) view.....




more to come....

[Rogue-AE95]

The before & after of the exhaust ports is especially noticeable!

[oldeskewltoy]

The before & after of the exhaust ports is especially noticeable!

2 down...., 2 to go.... then it goes off to get it's 3 angle......




more to come......

[oldeskewltoy]

.... and now to get her 3 angle.....




more to come.....

[oldeskewltoy]

now that the 3 angle is done, its time for checking chamber volumes........




all @ 37cc, so back to the shop for surfacing....


and then assembly with the new 252(222@ .050"), w/ 8.5mm lift



more to come....

[oldeskewltoy]

So this engine will be using a set of ITBs. It will be using a T3 adapter.


The ITB adapter needs a bit of blending.....




As do the intake ports... they too need some gentle blending





I pick up the head later today, so more to come.......

[oldeskewltoy]

Assembly.... This client is using a Supertech spring/retainer kit.




I've not been a fan of the Supertech kit. One reason is because I've not been a fan of the Supertech spring seat....

Kind of a shame actually... as there are many springs out there that can fit the stock spring seat.





The Supertech spring seat is a flat steel "washer". There is nothing on the Supertech spring seat to help keep the spring located/stable in the spring pocket. Introduce the "Macer" spring seat.



Richard Macer builds many racing 4AGE heads, and he has found the standard Supertech spring seat to be "wanting", so he designed and had manufactured an improved spring seat



The Macer seat fits the spring pocket, and the inside "neck" helps keep the spring located, and stable.

If you want to get a set, send me a note, and I'll forward contact info.

I've not been a fan of the Supertech kit. One reason....

the other reason.... HELP! Supertech Retainer / stock buckets




I checked valve protrusion through the retainer, I have .025" on the exhaust side, and .030"+ on the intake side... so that concern is no longer a concern.....




more to come....

[Rogue-AE95]

I checked valve protrusion through the retainer, I have .025" on the exhaust side, and .030"+ on the intake side... so that concern is no longer a concern.....

Did you have to use Bigport (or Mercedes?) keepers? Was this customer also using used OEM valves, or Supertech valves?

I'm still debating whether to sell off my Supertech valves, especially (as noted in that topic linked above) that I would be using OEM keepers and retainers.

[oldeskewltoy]

I checked valve protrusion through the retainer, I have .025" on the exhaust side, and .030"+ on the intake side... so that concern is no longer a concern.....

Did you have to use Bigport (or Mercedes?) keepers? Was this customer also using used OEM valves, or Supertech valves?

I'm still debating whether to sell off my Supertech valves, especially (as noted in that topic linked above) that I would be using OEM keepers and retainers.

apologies for not responding sooner... I used the keepers that came out of the engine when it was disassembled - so no, I didn't try and source early keepers, or mercedes keepers, the valves are stock.

To be fair, the Supertech seat (shim) is "designed" around the dual spring configuration.

completely agree... along with their guides for dual springs, and the seals for dual springs.

The complete kit is part of the reason I'm not a huge fan.

With that said, "complete kit", I called Ferria (not Supertech) and spoke to them about their "kit" (single spring and retainer - uses OEM spring seats). I called BECAUSE their single spring uses the stock seat. I got an interesting education.

Although the OEM spring, seat, and retainer all fit together nicely, they don't "lock" together. This absence of locking together allows each part to have different frequencies/harmonics - allowing higher wear. In an engine turning 8000+ rpm for 95% of its life, this is a big deal.

The locking together typically means there is an interference fit, as an example for those who have used Toda springs, they tend to snap onto(into) the OEM spring seat - locking the seat onto the spring. I'd be willing to bet(a nickel), that the Toda retainers also lock onto their springs.

The big but....... for engines that don't turn 8000+ rpm for 95% of their life... how important is it?? Toyota didn't think it necessary for regular use.... but what is "regular" use????

[Rogue-AE95]

Always something new to learn. Thanks for posting up the info.

This made me check my HKS valve springs. They fit the stock spring seats with no problems, and maybe 1mm of play.