I dynod my 355 tested several things I am sharing

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Re: I dynod my 355 tested several things I am sharing

Post by WeingartnerRacing » Tue Oct 24, 2017 9:05 am

Carnut I put some more info in previous posts was there something else you needed.

David I am curious what your cam numbers would have been. I now this cam is not perfect but I wanted to use shelf piston and there is no extra ptv clearance right now.
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Re: I dynod my 355 tested several things I am sharing

Post by Carnut1 » Tue Oct 24, 2017 9:38 am

Port lengths look long, how I do port lengths is I use solder and mold the roof for one measurement and do the same for the floor and average the lengths. I need the exhaust flange size as well. Thanks, Charlie
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Re: I dynod my 355 tested several things I am sharing

Post by WeingartnerRacing » Tue Oct 24, 2017 9:59 am

I know for sure intake is 5.4-5.45 the exhaust length i have wrote down is 3.5 but a stock one is 3.25 so I probably mis measured that. Exhaust exit is 1406. I use port centerline method.
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Re: I dynod my 355 tested several things I am sharing

Post by Carnut1 » Tue Oct 24, 2017 7:08 pm

eric 241 cfm.jpg
Charlie Dart Pro1 pre platinum 200 ported to 247cc vs. Eric Dragon Slayer 241cc
cfm graph
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Re: I dynod my 355 tested several things I am sharing

Post by Carnut1 » Tue Oct 24, 2017 7:10 pm

I really tried to get smooth curves where I was missing Eric's flows. My exhaust flows still have a dip in the curve.
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Re: I dynod my 355 tested several things I am sharing

Post by Carnut1 » Tue Oct 24, 2017 7:18 pm

eric 241 cfm sq in.jpg
cfm/ sq/in graph
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Re: I dynod my 355 tested several things I am sharing

Post by Carnut1 » Tue Oct 24, 2017 7:20 pm

eric 241 port vel.jpg
Eric has his stuff in order on his exhaust port!
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Re: I dynod my 355 tested several things I am sharing

Post by Carnut1 » Tue Oct 24, 2017 7:22 pm

eric 241 port energy ftlbs-1.jpg
Port energy graph
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Re: I dynod my 355 tested several things I am sharing

Post by Carnut1 » Tue Oct 24, 2017 7:23 pm

eric 241 port energy density-1.jpg
Port energy density graph
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Re: I dynod my 355 tested several things I am sharing

Post by statsystems » Tue Oct 24, 2017 8:06 pm

Carnut1 wrote:
Tue Oct 24, 2017 7:08 pm
eric 241 cfm.jpgCharlie Dart Pro1 pre platinum 200 ported to 247cc vs. Eric Dragon Slayer 241cc
cfm graph

I've seen heads with that dip in the exhaust curve make more power than without the dip. It might have been .100 lower but the dip was the same. It was about 15 HP better at 8800 and averaged 8ish better everywhere.

Never did understand why.

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Re: I dynod my 355 tested several things I am sharing

Post by Carnut1 » Tue Oct 24, 2017 8:13 pm

statsystems wrote:
Tue Oct 24, 2017 8:06 pm
Carnut1 wrote:
Tue Oct 24, 2017 7:08 pm
eric 241 cfm.jpgCharlie Dart Pro1 pre platinum 200 ported to 247cc vs. Eric Dragon Slayer 241cc
cfm graph

I've seen heads with that dip in the exhaust curve make more power than without the dip. It might have been .100 lower but the dip was the same. It was about 15 HP better at 8800 and averaged 8ish better everywhere.

Never did understand why.
Airflow is some crazy stuff. So maybe I won't kill myself trying to fix it. I did try a tulip valve that took a bunch of that dip out. Thanks, Charlie
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Re: I dynod my 355 tested several things I am sharing

Post by David Vizard » Tue Oct 24, 2017 9:05 pm

WeingartnerRacing wrote:
Tue Oct 24, 2017 9:05 am
Carnut I put some more info in previous posts was there something else you needed.

David I am curious what your cam numbers would have been. I now this cam is not perfect but I wanted to use shelf piston and there is no extra ptv clearance right now.
Eric.

Be glad to run the numbers but not this week as I am up to my neck in alligators that just won't give me an even break to get the swamp drained. PM me next week and I will get it done for you.
DV
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Re: I dynod my 355 tested several things I am sharing

Post by David Vizard » Tue Oct 24, 2017 9:14 pm

Carnut1 wrote:
Tue Oct 24, 2017 7:20 pm
eric 241 port vel.jpg Eric has his stuff in order on his exhaust port!
Charlie,
I agree,
Eric's ex port is wicked strong. Eric can you show me how you did that as it is better than my Dart ports!!!!!
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Re: I dynod my 355 tested several things I am sharing

Post by ZEOHSIX » Tue Oct 24, 2017 10:59 pm

Nice build! Did you use a 184 Bow tie block? I'm trying to figure that out....crank (scat?) rods.....would like to know type and weights on crank/rods.....

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Re: I dynod my 355 tested several things I am sharing

Post by WeingartnerRacing » Tue Oct 24, 2017 11:42 pm

David Vizard wrote:
Tue Oct 24, 2017 9:05 pm
WeingartnerRacing wrote:
Tue Oct 24, 2017 9:05 am
Carnut I put some more info in previous posts was there something else you needed.

David I am curious what your cam numbers would have been. I now this cam is not perfect but I wanted to use shelf piston and there is no extra ptv clearance right now.
Eric.

Be glad to run the numbers but not this week as I am up to my neck in alligators that just won't give me an even break to get the swamp drained. PM me next week and I will get it done for you.
DV
I will do that I would like to have an honest, non negative discussion about your cam formula. This is why I am curious about your numbers.
Eric Weingartner
Weingartner Racing LLC
918-520-3480
www.wengines.com

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