Custom Flange - 3d printing, CAD, Sand Casting
Re: Custom Flange - 3d printing, CAD, Sand Casting
According to chemistry, alcohol is a solution...
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Re: Custom Flange - 3d printing, CAD, Sand Casting
we have no bell mouth in either case of pipe or TB, the TB actually is machined radius on the inside. Pipe length played 99% of the effects. It didn't care of bellows, turns, filter no filter, bits of pipe held by hand end to end, fingers over the end of the pipe. No of that effected. Added 400mm of pipe and power and torque went up everywhere.
We tested this for most of the day, dyno run after run and backed up the results. No doubt what was going on. And how many engine builders/tuner have worked this out? probably 2/5th of bugger all.
Only car makers take this into consideration and know what they are doing.
We tested this for most of the day, dyno run after run and backed up the results. No doubt what was going on. And how many engine builders/tuner have worked this out? probably 2/5th of bugger all.
Only car makers take this into consideration and know what they are doing.
I'm the director of VSH (Vlad's Spec Holden), because HSV were doing it ass about.
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Re: Custom Flange - 3d printing, CAD, Sand Casting
That flow bench doesn't consider resonance...
You'd want an engine with a pressure sensor in place of a sparkplug. You could map real time intake flow variations by measuring peak cyl pressures. No vac pumps, blowers, just a hacked up engine.
You'd want an engine with a pressure sensor in place of a sparkplug. You could map real time intake flow variations by measuring peak cyl pressures. No vac pumps, blowers, just a hacked up engine.
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Re: Custom Flange - 3d printing, CAD, Sand Casting
What was the effect of more than 400mm?vlad01 wrote:we have no bell mouth in either case of pipe or TB, the TB actually is machined radius on the inside. Pipe length played 99% of the effects. It didn't care of bellows, turns, filter no filter, bits of pipe held by hand end to end, fingers over the end of the pipe. No of that effected. Added 400mm of pipe and power and torque went up everywhere.
We tested this for most of the day, dyno run after run and backed up the results. No doubt what was going on. And how many engine builders/tuner have worked this out? probably 2/5th of bugger all.
Only car makers take this into consideration and know what they are doing.
Re: Custom Flange - 3d printing, CAD, Sand Casting
That seems like a fantastic idea but why isnt that method widely used?BennVenn wrote:That flow bench doesn't consider resonance...
You'd want an engine with a pressure sensor in place of a sparkplug. You could map real time intake flow variations by measuring peak cyl pressures. No vac pumps, blowers, just a hacked up engine.
According to chemistry, alcohol is a solution...
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Re: Custom Flange - 3d printing, CAD, Sand Casting
Not sure. How much Hp does it take to spin an engine up to 7000rpm?
Re: Custom Flange - 3d printing, CAD, Sand Casting
Not sure, a commercial machine exists to do such a job, called a spintron...
http://trendperform.com/p-30013-spintron.html
http://trendperform.com/p-30013-spintron.html
According to chemistry, alcohol is a solution...
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Re: Custom Flange - 3d printing, CAD, Sand Casting
Actually, using 6/8 sensors would show the variations between cylinders due to runner locations in the plenum. Far better than flow only testing
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Re: Custom Flange - 3d printing, CAD, Sand Casting
This is done, used for tuning purposes. I believe it is a spark plug with a pressure sensor incorporated.Biggvl wrote:That seems like a fantastic idea but why isnt that method widely used?BennVenn wrote:That flow bench doesn't consider resonance...
You'd want an engine with a pressure sensor in place of a sparkplug. You could map real time intake flow variations by measuring peak cyl pressures. No vac pumps, blowers, just a hacked up engine.
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Re: Custom Flange - 3d printing, CAD, Sand Casting
I have heard others talking of this, most don't go any further other than hinting at the intake pipe length been an issue. It's certainly not something that is not shared openly but then unless you have the facilities to test it's a mute point anyway.vlad01 wrote:we have no bell mouth in either case of pipe or TB, the TB actually is machined radius on the inside. Pipe length played 99% of the effects. It didn't care of bellows, turns, filter no filter, bits of pipe held by hand end to end, fingers over the end of the pipe. No of that effected. Added 400mm of pipe and power and torque went up everywhere.
We tested this for most of the day, dyno run after run and backed up the results. No doubt what was going on. And how many engine builders/tuner have worked this out? probably 2/5th of bugger all.
Only car makers take this into consideration and know what they are doing.