OST-070: 7AGE for an N2 Levin
09-07-2020, 05:28 PM
Post: #21
OST-070: 7AGE for an N2 Levin
(08-29-2020 09:26 PM)Vaptor Wrote:  The Exhaust gasket you are using here, what specific model is it, and from what company?

The gasket was a collaboration between myself, and SV3* (before they closed). Essentially it is a Blacktop gasket(35mm port exit), that fits both 16V and 20V heads. It also has slightly "adjusted"(.020" down) bolt holes, for better port alignment.


* - http://sv3power.com/_p=939/

unfortunately it is no longer available - (35mm sold out)... although I am trying to see if they will make more.

I do know they do have about 8 of these gaskets remaining designed for full Atlantic ports - 38mm


35mm under 38mm
[Image: AEU86 AE86 - OST-070: 7AGE for an N2 Levin]



now 3 down.......


chambers....

[Image: AEU86 AE86 - OST-070: 7AGE for an N2 Levin]


and exhaust ports....

[Image: AEU86 AE86 - OST-070: 7AGE for an N2 Levin]


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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09-10-2020, 09:23 PM
Post: #22
OST-070: 7AGE for an N2 Levin
Bowl #8... as it transitions from stock to oversize

[Image: AEU86 AE86 - OST-070: 7AGE for an N2 Levin]


a different perspective.... on the transition

[Image: AEU86 AE86 - OST-070: 7AGE for an N2 Levin]



head is now ready for the new seats to be cut......

[Image: AEU86 AE86 - OST-070: 7AGE for an N2 Levin]



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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09-12-2020, 09:16 PM
Post: #23
OST-070: 7AGE for an N2 Levin
Love the details Hurray!

As I am going to use a TVS supercharger 900 or 1320 on my build, with High Lift cams, I was commended to go with 38mm (37mm) Exhaust port.
Do you perhaps know if the 38mm gasket is a 1:1 copy of an TODA gasket?

Just to compare what the local tuner recommends compared to your work, What diameter did you get the new bovls machined to?

I think I read somewhere, that you use some old SR20 valves, when doing the chambers, is this correct? Is there a certain size valve that you use, or is it the same size, as the oversize 4age valves IN32mm EX28mm?

Oversize valve work, is new to me. so hope that I can drain you for some knowledge Angel

Restoring my AE86, all the way... Going JDM style Big Grin
http://www.aeu86.org/viewtopic/ae86/p/150463#150463
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09-14-2020, 08:02 PM
Post: #24
OST-070: 7AGE for an N2 Levin
(09-12-2020 09:16 PM)Vaptor Wrote:  Love the details Hurray!

As I am going to use a TVS supercharger 900 or 1320 on my build, with High Lift cams, I was commended to go with 38mm (37mm) Exhaust port.
Do you perhaps know if the 38mm gasket is a 1:1 copy of an TODA gasket?

Just to compare what the local tuner recommends compared to your work, What diameter did you get the new bovls machined to?

I think I read somewhere, that you use some old SR20 valves, when doing the chambers, is this correct? Is there a certain size valve that you use, or is it the same size, as the oversize 4age valves IN32mm EX28mm?

Oversize valve work, is new to me. so hope that I can drain you for some knowledge Angel

1) copy of Toda - nope... ours is "better" ... because we took into account the gasket drop, so we adjusted ours .020" (bolt holes down, or if you prefer ports up)

2) the bowl/seat diameter (32mm/27.5mm) will be different depending on how much lift you are running.... under .350" lift - keep seat/bowl to 85%, over .400" lift - 88%

I have used other valves to protect seats when I've done the chamber work in the past - when I have machined seat to protect, in this case the seats haven't been cut, so I didn't need to protect them.


the pistons finally arrived....

[Image: AEU86 AE86 - OST-070: 7AGE for an N2 Levin]


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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