Re: Ported Dart 215's with port energy discussion 3.0

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groberts101
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Re: Ported Dart 215's with port energy discussion 3.0

Post by groberts101 » Sat Apr 14, 2018 8:21 pm

Carnut1 wrote:
Sat Apr 14, 2018 8:10 pm
Resized_20180414_200544.jpegHaving trouble getting a decent pic. I am thinking this is about the final bowl shape I will make the rest. Any input to help someone with no experience? Thanks, Charlie
No experience? Lol.. you might not be a big time pro headporter.. but you're sure as hell getting pretty good at grinding out cylinder head ports, Charlie.

Looks damned good in the picture but tough to say anything about the overall design by looking at it. Short side and cross section is where most of the magic happens to equalize the velocity profile, IMO.

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Re: Ported Dart 215's with port energy discussion 3.0

Post by Carnut1 » Sun Apr 15, 2018 8:59 am

Thanks Greg, if you check out the previous pic you can tell the ssr is in pretty good shape. Sometime you can see things in pics you miss looking at the head. For those interested this bowl was finished with an older straight blade aggresive single cut burr.
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Re: Ported Dart 215's with port energy discussion 3.0

Post by Carnut1 » Mon Apr 16, 2018 6:41 pm

0416181830a.jpg
Anyone else this twisted? I like the bowl the same shape on each port. (as close as possible anyway) The bowl is usually not centered but each straight wall will be the same distance from the valve stem. The distance from valve stem to pushrod wall as well. This seems to make a big difference in a similar swirl profile throughout the lift curve. Helps equalize the port cc a bit as well. Thanks, Charlie
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Re: Ported Dart 215's with port energy discussion 3.0

Post by Carnut1 » Sat Apr 21, 2018 9:15 am

Question answered on Larry's ssr thread.
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