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OST-044: What the "F"?
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06-09-2017, 01:38 AM
(This post was last modified: 06-09-2017 01:38 AM by oldeskewltoy.)
Post: #1
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OST-044: What the "F"?
It has been a while since I did an "F" head, Grunt's lump was built Dec 2010 to June 2011 - F head port, and rebuild
This "F" head is a later type, with the raised intake ports. Time to get it cleaned and pressure checked ![[Image: AEU86 AE86 - OST-044: What the "F"?]](http://ost.ebeans.ch/albums/userpics/10005/Before_work_starts.jpg "AEU86 AE86 - OST-044: What the \"F\"?") ![[Image: AEU86 AE86 - OST-044: What the "F"?]](http://ost.ebeans.ch/albums/userpics/10005/Before_work_startschamber_side.jpg "AEU86 AE86 - OST-044: What the \"F\"?") current short radius..... ![[Image: AEU86 AE86 - OST-044: What the "F"?]](http://ost.ebeans.ch/albums/userpics/10005/_3_chamber_-_short_radius_before.jpg "AEU86 AE86 - OST-044: What the \"F\"?") 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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06-09-2017, 09:28 AM
(This post was last modified: 06-09-2017 10:21 AM by ditn.)
Post: #2
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OST-044: What the "F"?
interesting,do you mean a 4afe?
a friend of me has one in his celica and is looking for cams etc. from what i have heard 4afe is also a great engine but parts support isnt there and it need tons of headwork |
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06-09-2017, 05:17 PM
(This post was last modified: 06-09-2017 05:18 PM by oldeskewltoy.)
Post: #3
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OST-044: What the "F"?
(06-09-2017 09:28 AM)ditn Wrote: interesting,do you mean a 4afe?Yes.... 4, or 7 AFE as to parts supply, there are a few companies who can make you cams... biggest issue there is the slave driven intake cam off the exhaust cam, and trying to adjust them independently.... Which head does he have? The first "F" head I worked was an early one with crappy ports, this one is cast much better. Dan - You can | .... OR you can ask for help!!!OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991 |
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06-20-2017, 11:19 PM
Post: #4
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OST-044: What the "F"?
from another forum Wrote:Those 2nd gen intake ports are so steep. That they are..... ![[Image: AEU86 AE86 - OST-044: What the "F"?]](http://ost.ebeans.ch/albums/userpics/10005/showing_chamber_pair_and_exhaust_port_difference_also_intake_port_angle.jpg "AEU86 AE86 - OST-044: What the \"F\"?") The intake valves are also bigger, 1st gen 30mm, 2nd gen 31mm  That is the extent of the good news... the bad news.... the front oil drain still interferes with the exhaust flow on #1 exhaust port ![[Image: AEU86 AE86 - OST-044: What the "F"?]](http://ost.ebeans.ch/albums/userpics/10005/_1_exhaust_port_interference3.jpg "AEU86 AE86 - OST-044: What the \"F\"?") ![[Image: AEU86 AE86 - OST-044: What the "F"?]](http://ost.ebeans.ch/albums/userpics/10005/exhaust_port__1_4_2_panel.jpg "AEU86 AE86 - OST-044: What the \"F\"?") 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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06-20-2017, 11:36 PM
Post: #5
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OST-044: What the "F"?
That's quite a big difference in amount of material that you can remove between #1 and #4
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-044: What the "F"?]](https://www.aeu86.org/sticker-banner-468.gif "AEU86 AE86 - OST-044: What the \"F\"?")
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06-22-2017, 02:39 PM
Post: #6
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OST-044: What the "F"?
he has the latter head
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06-23-2017, 04:07 AM
Post: #7
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OST-044: What the "F"?
What do I see........????
![[Image: AEU86 AE86 - OST-044: What the "F"?]](http://ost.ebeans.ch/albums/userpics/10005/Do_you_see_what_I_see.jpg "AEU86 AE86 - OST-044: What the \"F\"?")
Dan - You can | .... OR you can ask for help!!!OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991 |
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06-23-2017, 09:24 PM
Post: #8
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OST-044: What the "F"?
(06-23-2017 04:07 AM)oldeskewltoy Wrote: What do I see........???? While you are still trying to see what I see....  7 years ago when I built "Grunt's Lump, OST-011", I didn't have the easiest(best?) tool for setting, AND measuring the valves....... ![[Image: AEU86 AE86 - OST-044: What the "F"?]](http://ost.ebeans.ch/albums/userpics/10005/flowbench_tool_from_OST-011.jpg "AEU86 AE86 - OST-044: What the \"F\"?") Here is the design, and building process for the tool I'll be using this time..... ![[Image: AEU86 AE86 - OST-044: What the "F"?]](http://ost.ebeans.ch/albums/userpics/10005/flowbench_tool_milti_panel.jpg "AEU86 AE86 - OST-044: What the \"F\"?") quite a bit more accurate and reliable! 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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06-26-2017, 08:35 PM
(This post was last modified: 06-26-2017 08:51 PM by oldeskewltoy.)
Post: #9
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OST-044: What the "F"?
![[Image: AEU86 AE86 - OST-044: What the "F"?]](http://ost.ebeans.ch/albums/userpics/10005/flowbench_before.jpg "AEU86 AE86 - OST-044: What the \"F\"?") (06-23-2017 04:07 AM)oldeskewltoy Wrote: What do I see........???? wider valve spacing on the exhaust valves..... although not clear enough to measure in the photo, if you look at the cam journals, the intake journal is about 2mm narrower then the corresponding exhaust cam journal ![[Image: AEU86 AE86 - OST-044: What the "F"?]](http://ost.ebeans.ch/albums/userpics/10005/Do_you_see_what_I_see_answer.jpg "AEU86 AE86 - OST-044: What the \"F\"?") 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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07-06-2017, 04:33 PM
Post: #10
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OST-044: What the "F"?
So it has been a while.... and after some digging..
![[Image: AEU86 AE86 - OST-044: What the "F"?]](http://ost.ebeans.ch/albums/userpics/10005/chamber_1_and_22C_showing_port_work_in_1.jpg "AEU86 AE86 - OST-044: What the \"F\"?") there is improvement to be found.... ![[Image: AEU86 AE86 - OST-044: What the "F"?]](http://ost.ebeans.ch/albums/userpics/10005/flowbench_before_n_after_with_ported_and_unported_port.jpg "AEU86 AE86 - OST-044: What the \"F\"?") 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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