Polished up now...
You did a great job on that! I wonder if you will see any gains from that. I would be interested in trying this. :beer:Mostly just take off that little nub and take down the rough casting that is on the openings. I did not touch where it was smooth at the butterflys with anything less than 2000 grit to avoid roughing it up.
You did a great job on that! I wonder if you will see any gains from that. I would be interested in trying this. :beer:
Still learning on the ported Eaton process but I have a maybe stupid question, the 2 oval ports on each side of the main opening of the bottom of the blower, why not make them little larger, or just polishing up whats there?
Awesome, thank you for the detailed answer :rockon:Thats not a stupid question; they are backflow ports, what happens is that some of the air actually flows back to the incoming air charge. The incoming charge is at atmospheric pressure (14.7psi), a stock Eaton operates at 8psi (atmospheric pressure + 8psi; so infact the manifold pressure is 22.7 psi)
The manifold pressure is not really constant though it would appear to be, it actually fluctuates and by reducing the fluctuation via the back flow ports the in coming air charge can be closer to the manifold pressure reducing wear and stress on the rotors and bearings.
This is why twins screw designs are far superior and more quiet, the screw compresses the incoming charge to almost match the operating pressure.
When the supercharger whines, you are actually hearing the air flow back,
so if you really want a supercharger to perform the key is to make it quieter.
One other thought, the volume of air that the cylinders have to draw from will be slightly decreased and this could potentially have a significant impact on performance. I think I would just spot weld the plates in for initial testing, that way they can be easily removed if it doesn't go well.
Polished up now...
what kinda of polish?It will be good enough, I used a high RPM polisher to finish it. It doesnt really matter.
so if i use a dremil at a low speed to rough up the TB and then sand by hand with 800, 1000, 2000 will that work?
You can get the flappers that I posted in the first post in 1/8" also for a dremel.