OST-050 - A VERY special build

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oldeskewltoy
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OST-050 - A VERY special build

Postby oldeskewltoy » Thu Jul 05, 2018 11:40 am

Image



Image

Image

Image

Image



more to come..... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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oldeskewltoy
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Re: OST-050 - A VERY special build

Postby oldeskewltoy » Thu Jul 05, 2018 12:18 pm

Some additional photos to later be used as reference for re-assembly.


Image Image Image
Image Image Image


more to come...... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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oldeskewltoy
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Re: OST-050 - A VERY special build

Postby oldeskewltoy » Fri Jul 06, 2018 10:45 am

from another forum wrote:Care to share the plan for this beauty?




Well... a few things to point out.... a few of the pics showed Japanese text, and for those who were looking carefully they also saw no EGR, and they saw a MAP based EFI. So this engine is JDM.

But not just any JDM engine, this one is rather rare as this one was came from, and will be going back in..........

a Black Limited.........

(photo below edited)
Image


400 cars were produced. This rebuild... with a few tricks, will be going back into the Black Limited it came from.




More to come...... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

aukword1
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Re: OST-050 - A VERY special build

Postby aukword1 » Fri Jul 06, 2018 12:31 pm

Very cool! Is this the engine that you need the bluetop cam covers for?

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oldeskewltoy
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Re: OST-050 - A VERY special build

Postby oldeskewltoy » Fri Jul 06, 2018 5:42 pm

aukword1 wrote:Very cool! Is this the engine that you need the bluetop cam covers for?


yes.......
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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Rogue-AE95
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Re: OST-050 - A VERY special build

Postby Rogue-AE95 » Fri Jul 06, 2018 8:28 pm

Number 50 is indeed something special :idea:
'88 Corolla All-Trac

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oldeskewltoy
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Re: OST-050 - A VERY special build

Postby oldeskewltoy » Mon Jul 09, 2018 5:12 pm

Rogue-AE95 wrote:Number 50 is indeed something special :idea:


;)



dismantling begins........

Each and ever piece coming off the engine gets tagged and bagged........ (some new parts also in frame)

Image



With the head off the block, it now goes out to get cleaned and checked, one thing is certain... this engine has 9.4:1 pistons. There is something else certain in this view.... ???

Image



bearing numbers noted... can you see which crank it has??

Image


.... and the head disassembled, nice looking cams....

Image




especially considering this...... now no more (except deburring the rest of the head)

Image





more to come.... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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oldeskewltoy
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Re: OST-050 - A VERY special build

Postby oldeskewltoy » Wed Jul 11, 2018 10:06 am

oldeskewltoy wrote:
(except deburring the rest of the head)




Intake side....

Image


The whole head....

Image

from another forum wrote:
... but they did (Germany) indeed get two versions: one leaded (gobbling up Super Benzin) and one unleaded variant with a catalytic converter...


https://www.banpei.net/wp-content/galle ... -small.jpg - third column second line down 124PS vs 116PS

oldeskewltoy wrote:I wonder......... the unleaded one - 9.4:1, the leaded one 10.0:1???



Image


more to come.... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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oldeskewltoy
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Re: OST-050 - A VERY special build

Postby oldeskewltoy » Fri Jul 13, 2018 2:54 pm

Been a while....

part of this build is a complete restoration of the engine back to the condition(appearance) it was 32 years ago. And in that vain I've notice that the block[s] I've worked never looked like they carried paint originally.... and apparently they DIDN'T!

From 2 very reliable sources I've found out that Toyota didn't paint their engine blocks back then, but had the blocks phosphate dipped, that is how Toyota treated the blocks. So in that vain, this block is getting a very similar treatment, the coating on this block will mimic the original, but be a bit harder, longer lasting.

Along with the blocks restoration, the head, including the entire intake, right down to the T/B, has been sent out to be soda-blasted. Once the head is back I'll begin the port work.

before....
Image

Soda blasting is similar to other surface cleaning(sand blasting, bead blasting) but is completely harmless and water soluble - cleans up with water. I'll have an after pic in about a week.


I did clean and test the AAV (warm-up valve under T/B)... it appears to work...

Image

with the block prepped for a new coating, and the head and intake off getting soda blasted... the internals wait on a familiar ;) shop cart...

Image


More to come.... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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Rogue-AE95
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Re: OST-050 - A VERY special build

Postby Rogue-AE95 » Fri Jul 13, 2018 4:19 pm

Are those stock rods with press-fit 18mm wrist pins? I can't remember if those 10:1 pistons had 18mm or 20mm pins.
'88 Corolla All-Trac

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oldeskewltoy
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Re: OST-050 - A VERY special build

Postby oldeskewltoy » Fri Jul 13, 2018 4:46 pm

Rogue-AE95 wrote:Are those stock rods with press-fit 18mm wrist pins? I can't remember if those 10:1 pistons had 18mm or 20mm pins.

The 10:1 pistons were available in BOTH 18mm, and 20mm wrist pins........


These are 18mm wrist pins...
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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