OST-051: One Lap of America

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oldeskewltoy
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OST-051: One Lap of America

Postby oldeskewltoy » Fri Aug 31, 2018 8:01 am

I have a new client.....

Image




and he is building a car (AW11 MR2) to compete in.......... Image


His car build (13 pages deep): https://grassrootsmotorsports.com/forum ... 821/page1/


;) and so work begins.....


... on the intake side

Image



.... and the exhaust side

Image



more to come..... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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oldeskewltoy
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Re: OST-051: One Lap of America

Postby oldeskewltoy » Thu Sep 06, 2018 4:41 pm

A bit further....

Image

more to come.... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

User avatar
oldeskewltoy
Club4AG MASTER
Posts: 1771
Joined: Wed Jan 09, 2013 4:44 pm
Location: Portland, Oregon

Re: OST-051: One Lap of America

Postby oldeskewltoy » Wed Sep 12, 2018 11:03 am

3 down.....

Image


and finishing with #4... just look at how nasty those exhaust seats are.... good thing they are getting a full 3 angle!

Image


more to come..... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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oldeskewltoy
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Posts: 1771
Joined: Wed Jan 09, 2013 4:44 pm
Location: Portland, Oregon

Re: OST-051: One Lap of America

Postby oldeskewltoy » Wed Sep 19, 2018 7:35 am

oldeskewltoy wrote:
just look at how nasty those exhaust seats are....



Not any more... and you can now see the "chunk" taken from the head..... :o

Image





more to come..... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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Rogue-AE95
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Re: OST-051: One Lap of America

Postby Rogue-AE95 » Wed Sep 19, 2018 5:13 pm

That's a lot to cut... was it that bad? Seems like there won't be much left to cut for a rebuild.
'88 Corolla All-Trac

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oldeskewltoy
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Re: OST-051: One Lap of America

Postby oldeskewltoy » Thu Sep 20, 2018 7:44 am

Rogue-AE95 wrote:That's a lot to cut... was it that bad? Seems like there won't be much left to cut for a rebuild.


"bad" - no... there is a small flow advantage when the head is cut to the point that the chambers edge meets the "squish" zone smoothly. In addition a smaller chamber allows for a better piston design since the chambers is now smaller

As to how much more this head can/could be cut... way back in 2010....... http://www.hachiroku.net/forums/forum/m ... he-rockies - Cliff Notes for those that don't want to read up... 32cc chambers :o

This head has at least one more .004-.006" cut left...


more to come.... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

User avatar
oldeskewltoy
Club4AG MASTER
Posts: 1771
Joined: Wed Jan 09, 2013 4:44 pm
Location: Portland, Oregon

Re: OST-051: One Lap of America

Postby oldeskewltoy » Mon Sep 24, 2018 3:41 pm

adding an oil drain to the intake side of the head....

Image


more to come.... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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