OST-064: Breathing on a 3 rib
- oldeskewltoy
- Club4AG MASTER
- Posts: 2185
- Joined: Wed Jan 09, 2013 4:44 pm
- Location: Portland, Oregon
OST-064: Breathing on a 3 rib
more to come.....
OST Cyl head porting, - viewtopic.php?f=22&t=300
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
- oldeskewltoy
- Club4AG MASTER
- Posts: 2185
- Joined: Wed Jan 09, 2013 4:44 pm
- Location: Portland, Oregon
Re: OST-064: Breathing on a 3 rib
OST-064 "Cleaned"....
After getting it cleaned, I deburred the casting
And then before porting, I had it "tumbled" so the head now looks new, no discoloration do to oils, carbon, or coolants.
more to come......
After getting it cleaned, I deburred the casting
And then before porting, I had it "tumbled" so the head now looks new, no discoloration do to oils, carbon, or coolants.
more to come......
OST Cyl head porting, - viewtopic.php?f=22&t=300
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
- oldeskewltoy
- Club4AG MASTER
- Posts: 2185
- Joined: Wed Jan 09, 2013 4:44 pm
- Location: Portland, Oregon
Re: OST-064: Breathing on a 3 rib
Work begins.... One done...
and a bit closer...
more to come....
and a bit closer...
more to come....
OST Cyl head porting, - viewtopic.php?f=22&t=300
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
- oldeskewltoy
- Club4AG MASTER
- Posts: 2185
- Joined: Wed Jan 09, 2013 4:44 pm
- Location: Portland, Oregon
Re: OST-064: Breathing on a 3 rib
oldeskewltoy wrote:
more to come....
2 down....
more to come.........
OST Cyl head porting, - viewtopic.php?f=22&t=300
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
Re: OST-064: Breathing on a 3 rib
Great work as always! Quick question though, what does "tumbling" the head consist of? Is it similar to tumbling bullet casings?
- oldeskewltoy
- Club4AG MASTER
- Posts: 2185
- Joined: Wed Jan 09, 2013 4:44 pm
- Location: Portland, Oregon
Re: OST-064: Breathing on a 3 rib
aukword1 wrote: what does "tumbling" the head consist of? Is it similar to tumbling bullet casings?
Not sure (tumbling bullet casings...???) What "tumbling" means in this case is they have a large tool - it consists of a large cabinet, with a rotisserie that you strap the head too. The cabinet is closet, and it tumbles inside the cabinet. The media used is cast zinc shot.
a bit further yesterday..... 3 down....
and an up close view inside on the exhaust side....
more to come.....
OST Cyl head porting, - viewtopic.php?f=22&t=300
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
Re: OST-064: Breathing on a 3 rib
Ah, thanks for the clarification. It's actually very similar to tumbling bullet casings for reloading ammunition except its a different type of media used. Very cool!
- oldeskewltoy
- Club4AG MASTER
- Posts: 2185
- Joined: Wed Jan 09, 2013 4:44 pm
- Location: Portland, Oregon
Re: OST-064: Breathing on a 3 rib
oldeskewltoy wrote:
4 down....
more to come.....
OST Cyl head porting, - viewtopic.php?f=22&t=300
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
- oldeskewltoy
- Club4AG MASTER
- Posts: 2185
- Joined: Wed Jan 09, 2013 4:44 pm
- Location: Portland, Oregon
Re: OST-064: Breathing on a 3 rib
and the internals.......
crank on right has wankered key groove in snout
more to come.....
crank on right has wankered key groove in snout
more to come.....
OST Cyl head porting, - viewtopic.php?f=22&t=300
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
- oldeskewltoy
- Club4AG MASTER
- Posts: 2185
- Joined: Wed Jan 09, 2013 4:44 pm
- Location: Portland, Oregon
Re: OST-064: Breathing on a 3 rib
everything is back in my hands for final assembly....
head, with fresh valve job (machined .008")...
along with assembled short block - those are Molnar Tech 40/20 H- beam rods
Does anyone see the remnants of a problem in the deck???
It took a great deal of decking to get the block suitable to accept a metal gasket.... so much so that our deck is now .018" (piston above the deck!)
The "fix", Cometic C4166-051, that should set the squish back to .033", or just a tick above .8mm.......
More to come.....
head, with fresh valve job (machined .008")...
along with assembled short block - those are Molnar Tech 40/20 H- beam rods
Does anyone see the remnants of a problem in the deck???
It took a great deal of decking to get the block suitable to accept a metal gasket.... so much so that our deck is now .018" (piston above the deck!)
The "fix", Cometic C4166-051, that should set the squish back to .033", or just a tick above .8mm.......
More to come.....
OST Cyl head porting, - viewtopic.php?f=22&t=300
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
- oldeskewltoy
- Club4AG MASTER
- Posts: 2185
- Joined: Wed Jan 09, 2013 4:44 pm
- Location: Portland, Oregon
Re: OST-064: Breathing on a 3 rib
[QUOTE=oldeskewltoy;1110545]
along with assembled short block - those are Molnar Tech 40/20 H- beam rods
More to come..... [/QUOTE]
Did(Do) you see it????
How about if I point it out.......
A little extra clearance at the bottom of the bores to make sure the new rods clear during rotation
As often happens when you mix valves from one head, with a different head... and new cams......
Getting the valves tipped so that they are in the middle of my shim bank sizes so I can set valve clearance to the thousandth(.001")
more to come......
along with assembled short block - those are Molnar Tech 40/20 H- beam rods
More to come..... [/QUOTE]
Did(Do) you see it????
How about if I point it out.......
A little extra clearance at the bottom of the bores to make sure the new rods clear during rotation
As often happens when you mix valves from one head, with a different head... and new cams......
Getting the valves tipped so that they are in the middle of my shim bank sizes so I can set valve clearance to the thousandth(.001")
more to come......
OST Cyl head porting, - viewtopic.php?f=22&t=300
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
- oldeskewltoy
- Club4AG MASTER
- Posts: 2185
- Joined: Wed Jan 09, 2013 4:44 pm
- Location: Portland, Oregon
Re: OST-064: Breathing on a 3 rib
oldeskewltoy wrote:along with assembled short block - those are Molnar Tech 40/20 H- beam rods
More to come.....
Did(Do) you see it????
How about if I point it out.......
A little extra clearance at the bottom of the bores to make sure the new rods clear during rotation
As often happens when you mix valves from one head, with a different head... and new cams......
Getting the valves tipped so that they are in the middle of my shim bank sizes so I can set valve clearance to the thousandth(.001")
more to come......
OST Cyl head porting, - viewtopic.php?f=22&t=300
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
- oldeskewltoy
- Club4AG MASTER
- Posts: 2185
- Joined: Wed Jan 09, 2013 4:44 pm
- Location: Portland, Oregon
Re: OST-064: Breathing on a 3 rib
a nice 3 angle valve job... and back cut intake valve......
more to come...
more to come...
OST Cyl head porting, - viewtopic.php?f=22&t=300
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
- Rogue-AE95
- Club4AG Expert
- Posts: 493
- Joined: Thu Jan 10, 2013 4:03 pm
- Location: Tampa Bay, FL
Re: OST-064: Breathing on a 3 rib
I didn't realize those Molnar 40-20 rods required modifying the block. I had bought a set years ago from Orion, but I never used them.
'88 Corolla All-Trac x2 (manual, auto)
- oldeskewltoy
- Club4AG MASTER
- Posts: 2185
- Joined: Wed Jan 09, 2013 4:44 pm
- Location: Portland, Oregon
Re: OST-064: Breathing on a 3 rib
Rogue-AE95 wrote:I didn't realize those Molnar 40-20 rods required modifying the block. I had bought a set years ago from Orion, but I never used them.
Not always... Loynings made clearance before.... as that is easier then finding out during assembly
fresh hone....
and with the Cometic gasket fitted... NOTE: the front, and rear placement for the oil feed(front), and oil drain (rear)
and with the head fitted
more to come....
OST Cyl head porting, - viewtopic.php?f=22&t=300
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
- oldeskewltoy
- Club4AG MASTER
- Posts: 2185
- Joined: Wed Jan 09, 2013 4:44 pm
- Location: Portland, Oregon
Re: OST-064: Breathing on a 3 rib
A step further....
Doing a bit of custom fitting... the stock lower timing cover will not accommodate the T3 pulley snout (its broader - more diameter than stock), so the lower timing cover is "adjusted" so it will accommodate the T3 pulley
Once that detail is taken care of, the rest of assembly goes smoothly
Doing a bit of custom fitting... the stock lower timing cover will not accommodate the T3 pulley snout (its broader - more diameter than stock), so the lower timing cover is "adjusted" so it will accommodate the T3 pulley
Once that detail is taken care of, the rest of assembly goes smoothly
OST Cyl head porting, - viewtopic.php?f=22&t=300
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
Building a great engine takes knowing the end... before you begin
Enjoy Life... its the only one you get!
Re: OST-064: Breathing on a 3 rib
Big chamfer, still need a ring compressor?
Thanks, beautiful pics.
Thanks, beautiful pics.
Re: OST-064: Breathing on a 3 rib
Big chamfer, still need a ring compressor?
Thanks, beautiful work & pics.
Thanks, beautiful work & pics.