OST-066: I get all wavy (4AC content)
04-02-2020, 06:47 PM
Post: #10
RE: OST-066: I get all wavy (4AC content)
(03-28-2020 01:41 PM)Dave W Wrote:  Dan
Are you doing anything inside the chamber? Looks like both the exhaust and intake could use relief help on the side walls?
Dave W

The exhaust side of chambers 4 and 2 (far left, and 2nd from right in photo below) did get some massaging as they did encroach some on the exhaust valves of those 2 chambers.

[Image: AEU86 AE86 - RE: OST-066:  I get all wavy (4AC content)]

On the intake side, I left it alone as the gap from the valves edge to the chamber wall wasn't that tight, as an example here is a small block Ford chamber (Dart 210cc port performance head) the valve - chamber wall fit is tighter

[Image: AEU86 AE86 - RE: OST-066:  I get all wavy (4AC content)]


This head also required a thread repair chamber 3, it is a timesert. Timesert is the only real way to fix a spark plug hole. Using a helicoil doesn't transfer the heat properly.
[Image: AEU86 AE86 - RE: OST-066:  I get all wavy (4AC content)]


A very nice 3 angle valve job....

[Image: AEU86 AE86 - RE: OST-066:  I get all wavy (4AC content)]


re-assembly... using Viton rubber valve seals...

[Image: AEU86 AE86 - RE: OST-066:  I get all wavy (4AC content)]

... and Sealed Power (VS-813) valve springs - They have a bit more seat pressure, and can accommodate more lift.

[Image: AEU86 AE86 - RE: OST-066:  I get all wavy (4AC content)]

Dan -

You can |Sad .... OR you can ask for help!!!

OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991
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RE: OST-066: I get all wavy (4AC content) - oldeskewltoy - 04-02-2020 06:47 PM

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