Yes, seen via the clarity of the retrospectoscope, an unmodified 300-110 would have been a useful addition (as of course would OOTB versions of all the rest. What's a few more dyno days and a grand or so in parts and fuel? )
Manifold Dyno Test
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Re: Manifold Dyno Test
Felix, qui potuit rerum cognscere causas.
Happy is he who can discover the cause of things.
Happy is he who can discover the cause of things.
Re: Manifold Dyno Test
What do you mean "no control"..
Maybe a cam would have, but how many people build engines like this??
Re: Manifold Dyno Test
I've seen the same 2 or 3 manifolds tested on different engines, (same cube) a couple times, different cam etc. The trend was actually the same each time. One manifold was better than the other before 6500, same till 7000....that was the end of the rpm range. There were educated conclusions to be drawn each time.
One thing I will say is, just from having some time on a stuska. The 2 lowest power runs also happened to have the lowest average acceleration rate. Not drastically, but still lowest. I've seen a correlation between that using a stuska. It would likely be very small differences, but the differences in the manifolds are relatively small...for the most part anyway. Interesting tests regardless.
One thing I will say is, just from having some time on a stuska. The 2 lowest power runs also happened to have the lowest average acceleration rate. Not drastically, but still lowest. I've seen a correlation between that using a stuska. It would likely be very small differences, but the differences in the manifolds are relatively small...for the most part anyway. Interesting tests regardless.
Re: Manifold Dyno Test
I believe he means an unmodified manifold as a baseline for reference. However, since there are a number of different p.n.s in play, it's debatable what would be appropriate as the 'control' part.
Felix, qui potuit rerum cognscere causas.
Happy is he who can discover the cause of things.
Happy is he who can discover the cause of things.
Re: Manifold Dyno Test
This wasn't a planned test vs the Pro-Filer. The truth is Cobb has a few of my manifolds for "dyno" tests. This engine had Eric's 2892 for it. Next thing is Eric did a dominator, a local did one, and I sent over the 300-25. The PF was tested just because he had it for another project.
Re: Manifold Dyno Test
"Regardless of any conclusions to be drawn, BRAVO for pulling off and sharing such an extensive test series!"
Yea! What he said.^ Those of us without the dyno or the resources appreciate the info people are willing to share. I don't know why people here can't just appreciate the input. There's no agenda, just info. Thanks.
Yea! What he said.^ Those of us without the dyno or the resources appreciate the info people are willing to share. I don't know why people here can't just appreciate the input. There's no agenda, just info. Thanks.
Speedbump
"If it was easy, everybody would do it."
"If it was easy, everybody would do it."
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Re: Manifold Dyno Test
I don’t know if that is true because my Motown was second lowest average power but had the quickest acceleration of all manifolds.CGT wrote: ↑Mon Feb 12, 2018 4:54 pm I've seen the same 2 or 3 manifolds tested on different engines, (same cube) a couple times, different cam etc. The trend was actually the same each time. One manifold was better than the other before 6500, same till 7000....that was the end of the rpm range. There were educated conclusions to be drawn each time.
One thing I will say is, just from having some time on a stuska. The 2 lowest power runs also happened to have the lowest average acceleration rate. Not drastically, but still lowest. I've seen a correlation between that using a stuska. It would likely be very small differences, but the differences in the manifolds are relatively small...for the most part anyway. Interesting tests regardless.
Eric Weingartner
Weingartner Racing LLC
918-520-3480
www.wengines.com
Weingartner Racing LLC
918-520-3480
www.wengines.com
Re: Manifold Dyno Test
Thanks Chad, love to see tests like this. The heads otb or did they get a bit of love?
Servedio Cylinder Head Development
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Re: Manifold Dyno Test
I know everybody says the profiler is as cast, which it is but this is a cast version of a Wilson ported manifold. This manifold resembles no other cast manifold. It is not a spiffed up super victor it’s all new. So in my opinion it is the perfect baseline manifold because it is an cast ported manifold. I also think with more work it would have been right with the rest of the manifolds.
Eric Weingartner
Weingartner Racing LLC
918-520-3480
www.wengines.com
Weingartner Racing LLC
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www.wengines.com
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Re: Manifold Dyno Test
How is the acceleration measured on a Stuska?WeingartnerRacing wrote: ↑Mon Feb 12, 2018 6:14 pmI don’t know if that is true because my Motown was second lowest average power but had the quickest acceleration of all manifolds.CGT wrote: ↑Mon Feb 12, 2018 4:54 pm I've seen the same 2 or 3 manifolds tested on different engines, (same cube) a couple times, different cam etc. The trend was actually the same each time. One manifold was better than the other before 6500, same till 7000....that was the end of the rpm range. There were educated conclusions to be drawn each time.
One thing I will say is, just from having some time on a stuska. The 2 lowest power runs also happened to have the lowest average acceleration rate. Not drastically, but still lowest. I've seen a correlation between that using a stuska. It would likely be very small differences, but the differences in the manifolds are relatively small...for the most part anyway. Interesting tests regardless.
Re: Manifold Dyno Test
I wonder though if many of the newer manifolds, 2895, Motown, 300-110, aren't a hand ported core box?
Re: Manifold Dyno Test
The control would an as cast version of each vs their ported counter part.
The test would be more meaningful in my eyes. You could see if these gained or lost with porting.
No disrespect Chad. Still a cool test though
But it would also be nice to see the bsfc, temp, airflow etc. If we had a manifold that made 4 more hp but the bsfc shows its using way more fuel.. I might want the lesser hp manifold
The test would be more meaningful in my eyes. You could see if these gained or lost with porting.
No disrespect Chad. Still a cool test though
But it would also be nice to see the bsfc, temp, airflow etc. If we had a manifold that made 4 more hp but the bsfc shows its using way more fuel.. I might want the lesser hp manifold
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Re: Manifold Dyno Test
I’ve posted this before, but this was a great manifold test on a brake and an inertia dyno.
https://web.archive.org/web/20120307005 ... Engine.pdf
I wish there were more of those dynos around.
https://web.archive.org/web/20120307005 ... Engine.pdf
I wish there were more of those dynos around.
-Bob
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Re: Manifold Dyno Test
Is there a reason why?
If you can, what would you look for in a test like this?
-Bob