OST-058: "Q"
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09-28-2019, 05:14 PM
Post: #1
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OST-058: "Q"
![]() more to come...... ![]() Dan - You can | ![]() OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991 |
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09-28-2019, 08:41 PM
Post: #2
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OST-058: "Q"
![]() ![]() 1982 - TA60 Carina 4dr sedan - fun cruiser 1983 - AE86 Sprinter Trueno - import project 2013 - Honda Civic sport - daily driver 2004 - AEU86 dot ORG - daily domain Support our forum, buy from the AEU86 shop: ![]() |
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10-01-2019, 12:12 AM
Post: #3
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OST-058: "Q"
(09-28-2019 08:41 PM)banpei Wrote: Not a whole lot going through my mind....... ![]() ![]() Recently I've acquired 5 20V 4AG heads. Two Silvertop, and three Blacktop ![]() One of the Blacktop heads went to a client in Indiana, this head is #2 from that lot.... and it is available.... ![]() disassembled, ready to get cleaned ![]() more to come.... ![]() Dan - You can | ![]() OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991 |
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10-01-2019, 08:26 PM
Post: #4
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OST-058: "Q"
the head came back pretty clean...
This was the first 20V head I spent any time on deburring the casting flash ![]() Most of the casting flash was around the spark plug tube supports, and in the end areas. Some of the area are purposefully cast with a ledge, those areas stand out around the exhaust side bucket cylinders More to come...... ![]() Dan - You can | ![]() OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991 |
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10-03-2019, 03:07 AM
(This post was last modified: 10-03-2019 03:07 AM by oldeskewltoy.)
Post: #5
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OST-058: "Q"
and so it begins.... biggest thing on a Blacktop head is core shift... you can kind of see it in top photo's short radius as it isn't centered
![]() Chamber #2 on top, chamber #1 on the bottom.... You can also see where I've done blending around the valve seats more to come...... ![]() Dan - You can | ![]() OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991 |
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10-03-2019, 05:27 PM
Post: #6
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OST-058: "Q"
working the bowls to correct the core shift, and to create "gentle" short radii.....
![]() more to come...... ![]() Dan - You can | ![]() OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991 |
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10-04-2019, 01:12 AM
Post: #7
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OST-058: "Q"
2 down... 2 to go....
![]() more to come.... ![]() Dan - You can | ![]() OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991 |
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10-14-2019, 06:21 PM
Post: #8
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OST-058: "Q"
with the port work finished, its off to the machine shop to get its valve job, and re-surfacing
![]() more to come..... ![]() Dan - You can | ![]() OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991 |
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10-22-2019, 06:47 PM
Post: #9
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OST-058: "Q"
back from its valve job(ain't those back cuts purdy..... ), and re-surface... ready for re-assembly.
![]() more to come.... ![]() PS... this head still needs a new owner....... Dan - You can | ![]() OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991 |
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