OST's E and R&D
05-11-2014, 06:36 PM
Post: #1
OST's E and R&D
Been doing a bit of experimenting (while waiting for the burette to arrive to replace the broken one from OST-026)


[Image: AEU86 AE86 - OST's E and R&D]


[Image: AEU86 AE86 - OST's E and R&D]

[Image: AEU86 AE86 - OST's E and R&D]



[Image: AEU86 AE86 - OST's E and R&D]

[Image: AEU86 AE86 - OST's E and R&D]


Later today I'll be removing the pours of OST-026's 1st 2 exhaust ports. Once that is done, I'll fit the valves into OST-026 and pour the chamber. While I do that I'll be pouring the exhaust port from the untouched head....



So... I guess.... more to come.... Hurray!


oldeskewltoy Wrote:Later today I'll be removing the pours of OST-026's 1st 2 exhaust ports. Once that is done, I'll fit the valves into OST-026 and pour the chamber. While I do that I'll be pouring the exhaust port from the untouched head....



So... I guess.... more to come.... Hurray!

First the clay is removed, and the valves come out....

[Image: AEU86 AE86 - OST's E and R&D]



Next I use a cork screw....

[Image: AEU86 AE86 - OST's E and R&D]


gradually working it free....

[Image: AEU86 AE86 - OST's E and R&D]



and viola......

[Image: AEU86 AE86 - OST's E and R&D]




The chamber of OST-026 was also poured...

[Image: AEU86 AE86 - OST's E and R&D]



and so was the exhaust port of the untouched head

[Image: AEU86 AE86 - OST's E and R&D]


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
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05-11-2014, 08:15 PM
Post: #2
OST's E and R&D
Nice way to compare your job with the original! Thumbs up!

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

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05-11-2014, 10:24 PM
Post: #3
OST's E and R&D
Good work, I think Jeff did something similar quiet some time back.

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AE86 ex-daily
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05-12-2014, 05:49 PM (This post was last modified: 05-12-2014 06:00 PM by oldeskewltoy.)
Post: #4
OST's E and R&D
from another forum Wrote:Interesting... will you make molds/castings of each head you do work on starting with this one?

The supplies, and the time involved don't make it economically feasible to just add it ... BUT I am thinking of offering this as an additional service, for a fee

(05-11-2014 10:24 PM)Bean Bandit Wrote:  Good work, I think Jeff did something similar quiet some time back.

Sent from my Nexus 4 using Tapatalk

Jeff was doing the 20V intake ports... I'm not sure, but I don't know if he ever did any exhaust bowls/ports


(05-11-2014 08:15 PM)banpei Wrote:  Nice way to compare your job with the original! Thumbs up!

Thanks...

speaking about comparing the two.... Wink

[Image: AEU86 AE86 - OST's E and R&D]

[Image: AEU86 AE86 - OST's E and R&D]

The first thing I can tell you... the original exhaust is, without a doubt, a VERY good port. When I say I gain 3-10hp with my work... This port would lend itself to the lower side of my claim.

WHY?

The shape of the original port (bowls) shows a decent casting at both the short, and long radius's. They flow smoothly with little disruption. When I came across a head with nasty bowls, I'll cast it and post it, but for now you'll have to trust me... this original is pretty good.


So where do I gain 3, to lets say 5 hp in this head?

Part of it is in matching the valve seat to the bowl.... but the original design has a slight flaw........ It's "Y" shaped.... so the majority of where I improve the exhaust bowls and ports... even in a good casting... is where the bowls blend into the port......

[Image: AEU86 AE86 - OST's E and R&D]



I turn the "Y"... into a "V"... Less energy to navigate a straight port then one with a kink


from another forum Wrote:Any way we could see a atlantic ported head, chamber and ports.

I can ask Loynings... but I have a feeling they don't like to reveal as much as I'm willing too.... Huh

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
05-12-2014, 08:50 PM
Post: #5
OST's E and R&D
Exactly what I was aiming at... Wink
Nice job on the porting! Thumbs up!

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:
[Image: AEU86 AE86 - OST's E and R&D]
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