Originally Posted by Turbo99
The one of the charts have OD cog and I understand belt slip and all the variables. I want to see if anyone can come up with a RPM of the blower where it falls off. Everything else can be figured close enough the play with.
From what I can see it 18,000-19000 is about as fast as you want to go and still be efficient. With that being said I just wanted to see if other see the same data and from there you should be able to calculate what pulley setup will get you there and as you add cam, head work, compression, belt slip and other well that doesn't matter if you already are running a set-up and can figure your loss.
I never been one to just say because so & so said it doesn't work it must not work. I just want to see how others interpret the data.
From what I see on the charts it looks like if you spin the motor 18K rpm on a smaller engine the efficiency falls off, where the same blower at the same speed on a bigger engine make less boost but is more efficient.
You need to spin the blower so much faster on the 416 to make the same boost as on a 376. The heat you create by spinning the blower so fast negates any gain you would have made in the power. To make 16 psi on a 416 with the 2300 you'd prob spin the pulley's right off!! Not really, but you get my point.
I didn't stay at a Holiday in last night and come up with this shit on my own. I've watched all the 416+ tvs runs slow as shit then the cars either don't race it anymore or change it to a whipple. I don't have the hard data to back that up, it's just my observation.
If the 416 was such a good option for the maggie my car would be done by now. Ted agrees with the "theory" that the smaller the cubes the better the efficiency.