OST-034: Noir Crowning
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08-06-2015, 05:27 PM
Post: #11
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OST-034: Noir Crowning
I got a request........
More to come.... Dan - You can | .... OR you can ask for help!!! OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991 |
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08-06-2015, 05:53 PM
Post: #12
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OST-034: Noir Crowning
Oh man.... sweet..!
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08-06-2015, 06:19 PM
(This post was last modified: 08-06-2015 06:21 PM by Bean.)
Post: #13
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OST-034: Noir Crowning
Is it just me or does the 16V benefit more from porting than 20V regarding flow benefits?
AE86 ex-daily |
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08-12-2015, 12:31 AM
Post: #14
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OST-034: Noir Crowning
(08-06-2015 06:19 PM)Bean Bandit Wrote: Is it just me or does the 16V benefit more from porting than 20V regarding flow benefits? lets see....... the intake side..... paper towel in exhaust port is acting as a "cork", remember these are used valves, in used seats, and stuffing the opposite port to the one being test allows for honest figures. The numbers @ 28"....... Unported Intake -
Ported Intake -
There is a glaring error on one reading, can anyone find it??? I likely over adjusted one valve, What should it read (about/approximate)?? setting up to do the exhaust side Unported Exhaust -
Ported Exhaust -
More to come...... Dan - You can | .... OR you can ask for help!!! OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991 |
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08-24-2015, 08:20 PM
Post: #15
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OST-034: Noir Crowning
Nearly a 2 week delay...
I had a talk with my client, he is hoping for an exhaust to intake flow ratio approaching 80%. This is going to be extraordinarily difficult because the stock Blacktop flows about 61%, and the first attempt at porting the exhaust side did improve things, now 67%, but a further gain of 13% seems a long goal at best. My first attempt at porting the exhaust was limited because I didn't have a gasket to know where my edges were, and I didn't want to port beyond the gasket, for doing that would cause serious flow issues. So the initial porting on #4 exhaust was from about 33.6 to about 33.7, because not knowing the exhaust gasket left me a bit in the dark. My client sent me the OEM gasket Port on far right is #4, even with the gasket in the "down" position, there is still some room available in the port roof, and room all the way around the port. So now that I had a gasket, work begins on #2 exhaust port. Redline is the gaskets edge. A bit more dramatic.... The stock Blacktop gasket outlet is 36mm. Port #2 is now out to 34.8mm Later this week I'll get this on the bench and see what if any improvement there is over the first numbers. More to come........ Dan - You can | .... OR you can ask for help!!! OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991 |
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08-26-2015, 11:53 AM
(This post was last modified: 08-26-2015 11:53 AM by banpei.)
Post: #16
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OST-034: Noir Crowning
That's a lot of area you gained!
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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08-27-2015, 09:47 PM
Post: #17
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OST-034: Noir Crowning
oldeskewltoy Wrote: "New" exhaust port readings, #2 port - on right
The reason testing stopped @ .350 was my client is limited to 9mm of lift (.354") So now the intake @ .350" is @ 197.8cfm, while the exhaust is now @ 150.9, the exhaust to intake flow ratio is now a tick over 75% at peak lift, and over the lift range the exhaust to intake ratio is now about 71.5% (was 61%) More to come..... Dan - You can | .... OR you can ask for help!!! OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991 |
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09-04-2015, 01:46 AM
Post: #18
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OST-034: Noir Crowning
a few views of working the exhaust side.....
minimizing the guide boss, and tapering the guide - both to minimize their effect on the outgoing exhaust flow reshaping the exhaust port - maximizing flow 3 ports down.... one to go more to come..... Dan - You can | .... OR you can ask for help!!! OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991 |
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09-08-2015, 06:33 PM
Post: #19
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OST-034: Noir Crowning
Dan - You can | .... OR you can ask for help!!! OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991 |
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09-09-2015, 01:36 AM
Post: #20
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OST-034: Noir Crowning
Now to finish up the intakes and the chambers.... More to come....... Dan - You can | .... OR you can ask for help!!! OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991 |
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