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@gmail.com]
Sent: Friday, October 19, 2012 10:18 PM
To: Jim Gray
Cc: fot@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@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/
>
>
>
> jim g
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