Intake Manifold test - JMF / PMW + more
- Thread starter bazeng
- Start date
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A Few Pictures of the manifold:
I still have contact details from the seller as he screwed up my order and gave me a small port manifold instead. He took the wrong one back and supplied me with the correct version. Originally I had the option of a 65mm or 80mm neck.
I still have contact details from the seller as he screwed up my order and gave me a small port manifold instead. He took the wrong one back and supplied me with the correct version. Originally I had the option of a 65mm or 80mm neck.
Hey Cheeks, if you want your manifold tested, you can send it Direct to the Andrew at Specialised power porting.
I will pm you his Address buddy.
It does cost some cash to test, I ended up paying about $300.00 to test all the manifolds listed. I believe I have the answers I require for my next setup so if you want yours tested, you will have to pay for it. I believe it is worth the money for peice of mind.
Here is an example of a poor flowing manifold. This is personally my own manifold and it was rectified after testing with a properley designed inlet to the manifold.
http://au.youtube.com/watch?v=TIiaDr3ByMo
Flow significantly increased as the bend was placed in the correct position. Turbulance also went away.
I will pm you his Address buddy.
It does cost some cash to test, I ended up paying about $300.00 to test all the manifolds listed. I believe I have the answers I require for my next setup so if you want yours tested, you will have to pay for it. I believe it is worth the money for peice of mind.
Here is an example of a poor flowing manifold. This is personally my own manifold and it was rectified after testing with a properley designed inlet to the manifold.
http://au.youtube.com/watch?v=TIiaDr3ByMo
Flow significantly increased as the bend was placed in the correct position. Turbulance also went away.
Re-visiting this... did we end up getting the KU engineering manifold tested? Very mixed responses over the internets on this one...
Below is a comparitive dyno graph of the stock intake vs KU Engineering - stroker motor - interesting results:
http://www.lancerregister.com/showthread.php?t=163795
It gets flamed as being a cheap chinese copy..? Which is weird since they are manufactured in Taiwan - hence it would be good to see some actual flow figures and more like above.
Below is a comparitive dyno graph of the stock intake vs KU Engineering - stroker motor - interesting results:
http://www.lancerregister.com/showthread.php?t=163795
It gets flamed as being a cheap chinese copy..? Which is weird since they are manufactured in Taiwan - hence it would be good to see some actual flow figures and more like above.
CLuTZ
Diamonds are forever....
I thought the KU ones were made in malaysia?
I now have a performance metalworks big port intake that I wanted to test, but my car is about to get its cooler setup made
I now have a performance metalworks big port intake that I wanted to test, but my car is about to get its cooler setup made
Heres another good flow bench test comparison I've seen carried out recently on a 1G DSM engine: http://64.23.101.235/Iroc_g/SMIM.htm . The best results can only really be seen on a dyno using the same car/engine etc but that will take someone a lot of time and $$$ to do. The REEF manifold apparently was a one off design by someone in the US and nothing has eventuated in the market in the last 6 months about it. ie looks like both REEF manifolds were the one and only prototypes at this stage.
Both Baz's test in this thread and the link I just posted above were done on a flowbench at the same 28" of water. Theoretically the results should have been very similar for the same types of manifolds used in both tests. The cfm flow of each runner 1-4 in the JMF drag manifold results were similar in comparison to eachother, but the Magnus test results were very different if you look at each runner 1 compared to 1, 2 to 2 etc. In Baz's tests runner 4 in the Magnus flowed the least, in the US test it was runner #1 :w00t:
Both Baz's test in this thread and the link I just posted above were done on a flowbench at the same 28" of water. Theoretically the results should have been very similar for the same types of manifolds used in both tests. The cfm flow of each runner 1-4 in the JMF drag manifold results were similar in comparison to eachother, but the Magnus test results were very different if you look at each runner 1 compared to 1, 2 to 2 etc. In Baz's tests runner 4 in the Magnus flowed the least, in the US test it was runner #1 :w00t:
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Not sure Baz? but I just read through some of my emails with my tuner Matt at Hitman in Sydney (he's a pretty damn good experienced ECU tuner and has been arund the world tuning cars, even been in Canada to help tune some Magnus Motorsports cars a few years ago). After discussing the intake manifold tests he had the following to say:
"The intake manifold testing is interesting, but here is something to think about. What does max flow under vacuum have to do with max flow under pressure... very little. Picture your average intake. Any curve that is there will have different properties under different conditions. In an aspirated motor the air will be pulled into the motor and will take the easiest path, the inner radius. Under boost, air is pushed around the outer radius. So any test done under aspirated conditions (almost all flowbenches) does not reflect what happens under boost."
Matt's not bias and has a no bullshit attitude. Its appears in his opinion vacuum testing isnt a true indication of how well an intake manifold flows under forced induction. In saying that, even different boost levels will produce different results in different manifolds on a single test engine too.
"The intake manifold testing is interesting, but here is something to think about. What does max flow under vacuum have to do with max flow under pressure... very little. Picture your average intake. Any curve that is there will have different properties under different conditions. In an aspirated motor the air will be pulled into the motor and will take the easiest path, the inner radius. Under boost, air is pushed around the outer radius. So any test done under aspirated conditions (almost all flowbenches) does not reflect what happens under boost."
Matt's not bias and has a no bullshit attitude. Its appears in his opinion vacuum testing isnt a true indication of how well an intake manifold flows under forced induction. In saying that, even different boost levels will produce different results in different manifolds on a single test engine too.
I can't believe I've missed this thread!
Matt's comments are pretty much spot on. Pulling vacuum through the manifold also doesn't take into account the waves that are generated when the intake valves close, and how it can affect the air reaching other runners as standing waves occur within the plenum (these characteristics all vary with engine speed too). All it really tells is how much air (and hence, horsepower) each runner can theoretically flow under a condition of constant vacuum, which doesn't exist in a motor.
I honestly don't know enough about it to offer any insight on what the test results could mean in a real world application, and probably the only intake manifold test that I could (personally anyway - your milage may vary) quantify is the old fashioned kind - bolt each manifold to the same motor and see what happens. Of course, this may not necessarily reflect how they would react on your specific engine combination, so who knows.
Matt's comments are pretty much spot on. Pulling vacuum through the manifold also doesn't take into account the waves that are generated when the intake valves close, and how it can affect the air reaching other runners as standing waves occur within the plenum (these characteristics all vary with engine speed too). All it really tells is how much air (and hence, horsepower) each runner can theoretically flow under a condition of constant vacuum, which doesn't exist in a motor.
I honestly don't know enough about it to offer any insight on what the test results could mean in a real world application, and probably the only intake manifold test that I could (personally anyway - your milage may vary) quantify is the old fashioned kind - bolt each manifold to the same motor and see what happens. Of course, this may not necessarily reflect how they would react on your specific engine combination, so who knows.
