OST-078: Not the only one who signs their work.....
01-04-2022, 06:26 PM
Post: #1
OST-078: Not the only one who signs their work.....
[Image: AEU86 AE86 - OST-078:  Not the only one ... work.....]



Well.... I'm not the only one who signs their work......

[Image: AEU86 AE86 - OST-078:  Not the only one ... work.....]


But what did he do???? I assume this head didn't pressure test back in 2003....

[Image: AEU86 AE86 - OST-078:  Not the only one ... work.....]


so he repaired it

[Image: AEU86 AE86 - OST-078:  Not the only one ... work.....]


more to come..... Smile

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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01-06-2022, 04:46 PM
Post: #2
OST-078: Not the only one who signs their work.....
So what's the big deal.....???

When you invest $2000.00 on a head and cams, you want everything to be perfect, and I want it to be perfect too, as my reputation is worth a fair bit more............


So with the knowledge of this head going forward, I instruct the shop to be extra careful during the pressure check.

[Image: AEU86 AE86 - OST-078:  Not the only one ... work.....]



Does anyone see what I see???


more to come..... Smile

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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01-07-2022, 07:01 AM (This post was last modified: 01-07-2022 07:04 AM by Bean.)
Post: #3
OST-078: Not the only one who signs their work.....
Head might have been skimmed quite a bit judging by the mark on the water outlet.
Missing discoloration on the intake port where the TVIS valves are, as well as the discoloration is different on the far left.

AE86 ex-daily
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01-10-2022, 06:51 PM
Post: #4
OST-078: Not the only one who signs their work.....
(01-07-2022 07:01 AM)Bean Wrote:  Missing discoloration on the intake port where the TVIS valves are, as well as the discoloration is different on the far left.

I tend to call it the TVIS effect..... While the TVIS butterflies likely have some effect, I believe it also has to do with the offset injector port............

[Image: AEU86 AE86 - OST-078:  Not the only one ... work.....]


Note valves 1, 4, 5, and 8 are more heavily coated in carbon, they are NOT sprayed nearly as the other valves by the injector placement.

It is similar effect that direct injected engines suffer - large build up of carbon.



Port work begins.... 1 and 2/3 down........

[Image: AEU86 AE86 - OST-078:  Not the only one ... work.....]



more to come........ Smile

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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01-13-2022, 08:39 PM
Post: #5
OST-078: Not the only one who signs their work.....
3 down.........

[Image: AEU86 AE86 - OST-078:  Not the only one ... work.....]


Along with the head work (including cams...) this client sent me his oil pump to massage as well.

[Image: AEU86 AE86 - OST-078:  Not the only one ... work.....]

more to come.... Big Grin

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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01-13-2022, 10:20 PM
Post: #6
OST-078: Not the only one who signs their work.....
Do you get the heads vapor blasted these days? That thing is impeccable.
How useful do you reckon the oil pump 'massaging' is?

FABRICA MI DIEM, PVNC!
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01-17-2022, 05:33 PM
Post: #7
OST-078: Not the only one who signs their work.....
(01-13-2022 10:20 PM)Ivan141 Wrote:  Do you get the heads vapor blasted these days? That thing is impeccable.
How useful do you reckon the oil pump 'massaging' is?

I'm trying to persuade my shop to upgrade... the finish I'm getting is only after the head gets tumbled in zinc shot.

As far as massaging the oil pump... the outlet from the pump gears (2) is the most crucial.... Additionally, I've had an idea I've yet to implement, in adding a 45 degree wedge at the galley outlet (1) where it mounts to the block


[Image: AEU86 AE86 - OST-078:  Not the only one ... work.....]



4 down....

[Image: AEU86 AE86 - OST-078:  Not the only one ... work.....]

Next step valve job, then getting chamber volumes to determine depth of final surface machining.


more to come....... Hurray!

Dan -

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

OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991
Find all posts by this user


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