Ported Ford 289 heads with port energy discussion

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Mike T
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Re: Ported Ford 289 heads with port energy discussion

Postby Mike T » Fri Jul 28, 2017 7:01 pm


Carnut1
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Re: Ported Ford 289 heads with port energy discussion

Postby Carnut1 » Fri Jul 28, 2017 7:46 pm

Good article. Interested in some feedback from that in reference to these castings. Thanks, Charlie

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Re: Ported Ford 289 heads with port energy discussion

Postby pdq67 » Sat Jul 29, 2017 2:38 am

Charlie,

Why were the old, "sparkplug trough", heads so bad? Like the old '56, 265", -306 heads combustion chambers.

pdq67

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Re: Ported Ford 289 heads with port energy discussion

Postby Carnut1 » Sat Jul 29, 2017 3:06 am

I have never worked on a set of those heads. 1.72"/1.5" valves I believe with tiny ports and a horrible chamber for flame front propigation. I would say not so great, can they be improved? Lots.

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Re: Ported Ford 289 heads with port energy discussion

Postby Carnut1 » Sun Jul 30, 2017 5:26 pm

20170730_181250.jpg
66 289 1.85" valve bowl progression. A bit bigger, ssr laid back more, roof raise a bit, opened pinch a bit. Exhaust needed to go to 1.6" due to some seats that would not clean up at 1.5".
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Re: Ported Ford 289 heads with port energy discussion

Postby ozyfordman » Sun Jul 30, 2017 5:51 pm

Be very careful raising the roof too much on the cylinder wall side. I ruined a set long ago getting greedy there, it is pretty thin. I didn`t have a sonic tester though. Great work!

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Re: Ported Ford 289 heads with port energy discussion

Postby Carnut1 » Sun Jul 30, 2017 6:15 pm

ozyfordman wrote:Be very careful raising the roof too much on the cylinder wall side. I ruined a set long ago getting greedy there, it is pretty thin. I didn`t have a sonic tester though. Great work!

Roof is still .2" thick. Using the sonic quite a bit since my last oh, no! Trying to get the best flows with a relatively small port. I have a feeling they will still wind up about 150 cc. Thanks, for the kind words.

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Re: Ported Ford 289 heads with port energy discussion

Postby David Vizard » Sun Jul 30, 2017 7:07 pm

Carnut1 wrote:20170730_181250.jpg66 289 1.85" valve bowl progression. A bit bigger, ssr laid back more, roof raise a bit, opened pinch a bit. Exhaust needed to go to 1.6" due to some seats that would not clean up at 1.5".



Charlie, I just love you iron cutter work - it's inspirational and gives me a goal to aim for.
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David Vizard Small Group Performance Seminars - held about every 4 weeks. My shop or your shop. Contact seminar organizer at marvingvx@gmail.com for details.

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Re: Ported Ford 289 heads with port energy discussion

Postby Carnut1 » Sun Jul 30, 2017 7:15 pm

The irony, me being an inspiration to you. I will give a detailed lesson next visit. Thank you

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Re: Ported Ford 289 heads with port energy discussion

Postby Carnut1 » Sun Jul 30, 2017 7:24 pm

20170730_201921.jpg
Not a great pic but interested in feedback on this string and what it tells us. Thanks, Charlie
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Re: Ported Ford 289 heads with port energy discussion

Postby ozyfordman » Sun Jul 30, 2017 8:01 pm

I went through adjacent to the guide on the roof trying to get the bowl bigger on a set of C5AEs.These are very hard to find in Australia. There is water close by and it would be a difficult spot to probe. Wouldn`t you know it , it was the last port out of 16. Tried brazing it and made a big mess of it. Bought a set of Windsor seniors instead ( they were just out then) and went to town on them. I avoid iron these days, particilarly old castings. I admire your perseverance.

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Re: Ported Ford 289 heads with port energy discussion

Postby Carnut1 » Sun Jul 30, 2017 8:14 pm

I am looking forward to some aluminums soon, thanks.

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Re: Ported Ford 289 heads with port energy discussion

Postby GARY C » Sun Jul 30, 2017 8:17 pm

Carnut1 wrote:20170730_201921.jpg Not a great pic but interested in feedback on this string and what it tells us. Thanks, Charlie

What did you learn from that?

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Re: Ported Ford 289 heads with port energy discussion

Postby Carnut1 » Sun Jul 30, 2017 8:27 pm

GARY C wrote:
Carnut1 wrote:20170730_201921.jpg Not a great pic but interested in feedback on this string and what it tells us. Thanks, Charlie

What did you learn from that?

I think it is interesting how the string shows where the air flows and sometimes the air turbulence. This was at .7" lift at about 217 cfm. You can see by the blurred pic that the string was moving up and down. Interested in what others think, Thanks, Charlie

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Re: Ported Ford 289 heads with port energy discussion

Postby Carnut1 » Sun Jul 30, 2017 8:44 pm

20170730_213835.jpg
I like this pic, little different starting point and the string is dead straight and the string hovers off the wall. You can actually see the airflow path. Thanks, Charlie
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