Pressure differentials due to wave propagation, algebraic summing, etc.Stan Weiss wrote: ↑Wed Jun 06, 2018 2:35 pm If I have adjustable headers and change the primary pipe length and or collector length and see an increase or decrease in et. What caused the change in et?
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Flow bench results
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Re: Flow bench results
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Re: Flow bench results
It made more power?Stan Weiss wrote: ↑Wed Jun 06, 2018 2:35 pm If I have adjustable headers and change the primary pipe length and or collector length and see an increase or decrease in et. What caused the change in et?
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Re: Flow bench results
Or it made less power.Frankshaft wrote: ↑Wed Jun 06, 2018 4:36 pmIt made more power?Stan Weiss wrote: ↑Wed Jun 06, 2018 2:35 pm If I have adjustable headers and change the primary pipe length and or collector length and see an increase or decrease in et. What caused the change in et?
Stan
Re: Flow bench results
LOLWarp Speed wrote: ↑Wed Jun 06, 2018 1:39 pm
How do I get the right camshaft events?!?
128 of course!
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Re: Flow bench results
Right, missed the increase part.statsystems wrote: ↑Wed Jun 06, 2018 4:50 pmOr it made less power.Frankshaft wrote: ↑Wed Jun 06, 2018 4:36 pmIt made more power?Stan Weiss wrote: ↑Wed Jun 06, 2018 2:35 pm If I have adjustable headers and change the primary pipe length and or collector length and see an increase or decrease in et. What caused the change in et?
Stan
Re: Flow bench results
Wish it was as easy as you make it sound.Scotthatch wrote: ↑Wed Jun 06, 2018 10:33 am ... if I need more HP I can up the cfm or move the closing point of the intake valve out more ... now this just deals with peak HP
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Re: Flow bench results
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Re: Flow bench results
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Re: Flow bench results
randy331 wrote: ↑Wed Jun 06, 2018 5:10 pmWish it was as easy as you make it sound.Scotthatch wrote: ↑Wed Jun 06, 2018 10:33 am ... if I need more HP I can up the cfm or move the closing point of the intake valve out more ... now this just deals with peak HP
Randy
Everyone that has pulled heads and ported them to gain power is doing so to up the cfm flow not to change some wave characteristic .... when you add high ratio rockers and gain power why is it helping? More flow from peak lift? Changing cam specs? Or did it change the waveform?
You guys are so hung up on the cool idea of how to refine a engine you have forgotten the bread and butter of how it works most of the time .....
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Re: Flow bench results
Scotthatch wrote: ↑Wed Jun 06, 2018 6:57 pmrandy331 wrote: ↑Wed Jun 06, 2018 5:10 pmWish it was as easy as you make it sound.Scotthatch wrote: ↑Wed Jun 06, 2018 10:33 am ... if I need more HP I can up the cfm or move the closing point of the intake valve out more ... now this just deals with peak HP
Randy
Everyone that has pulled heads and ported them to gain power is doing so to up the cfm flow not to change some wave characteristic .... when you add high ratio rockers and gain power why is it helping? More flow from peak lift? Changing cam specs? Or did it change the waveform?
You guys are so hung up on the cool idea of how to refine a engine you have forgotten the bread and butter of how it works most of the time .....
I have ported heads that flowed LESS and made a good bit more power. A Stage IV Chrysler is one example of an head like that.
Re: Flow bench results
Take a look at cgarb s 421 vs mine, our IVC are the same and his heads flow more than mine, why does mine make more power ?Scotthatch wrote: ↑Wed Jun 06, 2018 6:57 pmrandy331 wrote: ↑Wed Jun 06, 2018 5:10 pmWish it was as easy as you make it sound.Scotthatch wrote: ↑Wed Jun 06, 2018 10:33 am ... if I need more HP I can up the cfm or move the closing point of the intake valve out more ... now this just deals with peak HP
Randy
Everyone that has pulled heads and ported them to gain power is doing so to up the cfm flow not to change some wave characteristic .... when you add high ratio rockers and gain power why is it helping? More flow from peak lift? Changing cam specs? Or did it change the waveform?
You guys are so hung up on the cool idea of how to refine a engine you have forgotten the bread and butter of how it works most of the time .....
If your theory about more cfm and later IVC always making more power is right, his should be making more.
Randy
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Re: Flow bench results
randy331 wrote: ↑Wed Jun 06, 2018 8:02 pmTake a look at cgarb s 421 vs mine, our IVC are the same and his heads flow more than mine, why does mine make more power ?Scotthatch wrote: ↑Wed Jun 06, 2018 6:57 pm
Everyone that has pulled heads and ported them to gain power is doing so to up the cfm flow not to change some wave characteristic .... when you add high ratio rockers and gain power why is it helping? More flow from peak lift? Changing cam specs? Or did it change the waveform?
You guys are so hung up on the cool idea of how to refine a engine you have forgotten the bread and butter of how it works most of the time .....
If your theory about more cfm and later IVC always making more power is right, his should be making more.
Randy
Is the flow quality the same ? Does the intake support the flow ? Does the carb support the flow? Is the timing the same ? Is it having a burn problem with the fuel ? Was it tested differently?
What it shows is the potential of the engine power you can be lower if things are not correct ....
I posted lots of dyno tests where the HP was dead on
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Re: Flow bench results
When you flow a head just because you hit a number does not mean the air is moving smooth and clean if it is rough on the bench it will stall on the motor ..