OST-105: 2nd gen, standard valve bigport head

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oldeskewltoy
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Location: Portland, Oregon

OST-105: 2nd gen, standard valve bigport head

Postby oldeskewltoy » Mon May 06, 2024 9:51 am

For sale: OST-105, a 2nd gen standard valve bigport head. Fully ported, and rebuilt using new viton rubber valve seals, and BC valves springs (good for cams with upto 10mm of lift)

$1300 + shipping - NO CORE REQUIRED

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nicely polished cam journals, and deburred casting

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middle of port work, bowl 5(left) now nicely shaped, and bowl 4(right) not yet begun
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Port work complete, next step multi angle valve job....

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upclose on the multi angle valve job....

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Assembly using BC springs

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message me, or better yet email me: oldeskewltoy@yahoo.com Title it: "OST-105"
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!

allencr
Club4AG Expert
Posts: 398
Joined: Thu Jan 10, 2013 9:59 pm

Re: OST-105: 2nd gen, standard valve bigport head

Postby allencr » Mon Jun 10, 2024 11:33 am

Thanks for the pics.
WOW, that spring comp., you've spent a LOTTA time with it even if you do the removal with a hammer & socket!
Weld a nut & use your drill??
/
Also, a nicer surface might increase its sellability.

User avatar
oldeskewltoy
Club4AG MASTER
Posts: 2188
Joined: Wed Jan 09, 2013 4:44 pm
Location: Portland, Oregon

Re: OST-105: 2nd gen, standard valve bigport head

Postby oldeskewltoy » Sun Jun 16, 2024 8:15 pm

allencr wrote:Thanks for the pics.
WOW, that spring comp., you've spent a LOTTA time with it even if you do the removal with a hammer & socket!
Weld a nut & use your drill??
/
Also, a nicer surface might increase its sellability.


The surface has been machined... .004". I'll get a photo tomorrow..... ;)
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!

User avatar
oldeskewltoy
Club4AG MASTER
Posts: 2188
Joined: Wed Jan 09, 2013 4:44 pm
Location: Portland, Oregon

Re: OST-105: 2nd gen, standard valve bigport head

Postby oldeskewltoy » Mon Jun 17, 2024 9:28 am

Image

and packed in a 4 mil bag keeping it clean
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!