our first ported oem intake manifold
#42
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Yes, with a turbo, you should have constant boost, so the engine will be flowing more air, which means more power.
With a positive displacement supercharger, it's a little different. The supercharger will pump almost the same amount of air with 2 psi reduction in backpressure (boost).
With a positive displacement supercharger, it's a little different. The supercharger will pump almost the same amount of air with 2 psi reduction in backpressure (boost).
#48
Valve control:
I have a vac line, passing thru a 1 way valve, to an accumilator(I am using a small fuel filter). This gives me a steady vac source. This goes to a 3 way valve, which came off a stock Miata. The common port of the valve goes to the vac actuator on the manifold. The other port on the valve is vented to atmosphere. (I'll post a pic, but have to head out of the house now..)
#51
Here is the valve and associated components to control the IM actuator. The IM actuator, needs to have vacuum to close the IM plates, and no vacuum to open them. The clear hose goes to the air filter. When the valve is unpowered, this port is connected to the IM actuator. The one way valve (green/white) is connected to a vac source, and then an small fuel filter, which stores vacuum. The vacuum storage may not be necessary, however I added it, to ensure that there was always plenty of vacuum available...
Both methods do precisely that. Here is what you would see using each method.
To reverse the action of the valve, I just need to tick a box in the MS software, to reverse the polarity of the valve control signal. I also need to have a different VE table for the different settings of the IM actuator, otherwise the car will run rich which will make the test results not comparable.
If I had one of these, I would first put it on the car, and determine if it was flowing better. With an aftermarket computer, you can see how much extra fuel (VE) you need to add, to maintain the same AFR. By looking at amount of additional fuel you need to add, you can determine if you should be seeing a power gain worthy of taking it to the dyno.... Othewise, you could be spending $$, used better elsewhere.
My test shows you precisely what the power difference is when you compare the 2 plots. Showing the ideal switchpoint can be considered a side bonus.
To reverse the action of the valve, I just need to tick a box in the MS software, to reverse the polarity of the valve control signal. I also need to have a different VE table for the different settings of the IM actuator, otherwise the car will run rich which will make the test results not comparable.
Just wondering if 01 Euro means square top. They are so hyped now that it's about time someone did a proper dyno comparison.
#54
Here ya go bitzchezzz
http://www.flyinmiata.com/tech/dyno_runs/99_050400.pdf
Green would be closed, blue would be open, and red would be the combo.
http://www.flyinmiata.com/tech/dyno_runs/99_050400.pdf
Green would be closed, blue would be open, and red would be the combo.
#59
There is a place that does something like this, the force mud thru the intake mani under 7-3000psi to debur anything including intakes and heads
http://www.extrudehone.com/
http://www.extrudehone.com/