[Fot] I cut intake & exhaust port sections today ( tr4 )

[Terry Stetler]

And to think that this is the "improved" head compared to the original TR2/TR3
design...


Terry Stetler
  ----- Original Message -----
  From: Jim Gray<mailto:toodamnfunky at comcast.net>
  To: 'Bill Babcock'<mailto:ponobill at gmail.com>
  Cc: fot at autox.team.net<mailto:fot at autox.team.net>
  Sent: Saturday, October 20, 2012 2:04 AM
  Subject: Re: [Fot] I cut intake & exhaust port sections today ( tr4 )


  The exhaust doesn't have to be as efficient as the intake because the
charge
  is under pressure on the way out but that square 90 degree turn could
  benefit from a fillet weld right in the corner behind the valve guide boss.
  The intake isn't bad really except it's a pretty tight curve coming off the
  valve seat. That curve will get flattened out.
  I'll be doing some silicone casts of the stock ports and then I'll make
some
  of my current ported head. We'll start in on the flowbench next month.

  jg


  -----Original Message-----
  From: Bill Babcock [mailto:ponobill at gmail.com]
  Sent: Friday, October 19, 2012 10:18 PM
  To: Jim Gray
  Cc: fot at autox.team.net<mailto:fot at autox.team.net>
  Subject: Re: [Fot] I cut intake & exhaust port sections today ( tr4 )

  Yeah, the exhaust port looks like it was cast using plumbing parts. Intake
  is not that much better.
  On Oct 19, 2012, at 8:23 PM, "Jim Gray"
<toodamnfunky at comcast.net<mailto:toodamnfunky at comcast.net>> wrote:

  > FoT,
  > I cut some TR4 port sections today, right down the middle of the valve
  > guides. It sure is a different view of the
  >
  > TR4 ports. The exhaust port is a mess. I'm going to try welding around
the
  > back of the valve guide boss
  >
  > and try to smooth out that wall the exhaust charge slams into just
outside
  > the valve seat.
  >
  > We'll find out on the flow bench, I have three more cylinders to
  experiment
  > with
  >
  >
  >
  > Pix are on photobucket
  >
  >
http://s698.photobucket.com/albums/vv341/TR4jim/Cylinder%20head/<http://s698.
photobucket.com/albums/vv341/TR4jim/Cylinder%20head/>
  >
  >
  >
  > jim g
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