2 heads better than 1 - power porting E7TE iron.

Carnut1 · Post by **Carnut1** » Tue Jun 20, 2017 7:52 pm

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Tight back lit bowl shot.

Carnut1 · Post by **Carnut1** » Tue Jun 20, 2017 8:02 pm

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Back lit bowl shot with blurry floor.

Carnut1 · Post by **Carnut1** » Tue Jun 27, 2017 9:08 pm

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Getting info together for port energy graph I sharpied the port shapes while measuring the port lengths. This is an average flowing port, notice the ssr is less than ideal. Sorry for the dirty finger prints.

Carnut1 · Post by **Carnut1** » Tue Jun 27, 2017 9:13 pm

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Exhaust port sharpie curve.

Carnut1 · Post by **Carnut1** » Tue Jun 27, 2017 9:54 pm

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I found this cutaway E7 exhaust to compare to modified port. The water between stem and emission bulge needs to be watched when cutting. I left about .125" everywhere on the exhaust ports.

Carnut1 · Post by **Carnut1** » Mon Jul 03, 2017 5:55 pm

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Port energy graph data. E7TE 1.94"/ 1.6" lightly ported starting point.

Carnut1 · Post by **Carnut1** » Mon Jul 03, 2017 6:07 pm

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After 2.0" / 1.6" combo. Pinch 301.7 ft/sec, ssr 384 ft/ sec cylinder wall side, 401 ft/sec center ssr, 388 ft/ sec center of cylinder ssr @.7" lift.
Exhaust 329 ft/sec center flange,
184 cfm with 1 5/8" pipe @ .7" lift
186.6 cfm with 1 7/8" pipe @ .7" lift.

Carnut1 · Post by **Carnut1** » Mon Jul 03, 2017 6:16 pm

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Cfm difference graph, thin lines 1.94"/ 1.5" combo.

RevTheory · Post by **RevTheory** » Mon Jul 03, 2017 6:40 pm

Quite a gain, bud. Nice work.

Carnut1 · Post by **Carnut1** » Mon Jul 03, 2017 6:45 pm

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Cfm/ sq" graph.

Carnut1 · Post by **Carnut1** » Mon Jul 03, 2017 6:48 pm

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Port velocity graph.

Carnut1 · Post by **Carnut1** » Mon Jul 03, 2017 6:57 pm

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Port energy graph. I feel these heads could have been better. I was gun shy after ruining the 289 heads. These are quite thick still and flow pretty well considering the port sizes. The port energy is nearly twice the 1.94"/ 1.5" valve combo. I am done with these and they have been delivered to DV. I hope he is happy with how they turned out and are usable for his 347 project. Thanks to all who helped!

Carnut1 · Post by **Carnut1** » Mon Jul 03, 2017 7:01 pm

I should add this is David's and Stan' s new port energy program. I am still taking pictures of computer screens but I know he has the program set up to move files. I just need some time and help from my 11 year old to figure it out. Fyi, this program kicks! Thanks, Charlie

Carnut1 · Post by **Carnut1** » Mon Jul 03, 2017 8:18 pm

RevTheory wrote:Quite a gain, bud. Nice work.

Thanks, Rev.

David Vizard · Post by **David Vizard** » Tue Jul 04, 2017 10:30 pm

Charlie,

Got the E7TE heads back that you ported for me..
Great work you could go pro on such work but if you do make sure you charge what such work is truly worth.

Will shoot some pics and my test results in a day or so.

Thanks
DV

Don Terrill’s Speed-Talk

2 heads better than 1 - power porting E7TE iron.

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Re: 2 heads better than 1 - power porting E7TE iron.

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Re: 2 heads better than 1 - power porting E7TE iron.

Re: 2 heads better than 1 - power porting E7TE iron.

Re: 2 heads better than 1 - power porting E7TE iron.

Re: 2 heads better than 1 - power porting E7TE iron.