Look at the Ogura web site. They made them for Toyota, and do a great trade in new ones. The technology is improving all the time.
http://www.oguraclutch.co.jp/english/e_products/sc/sc-1.htm
The SC14 is a 1.4 litre per rev blower with only two blades. It produces rather savage pulses, but is known to well enough to produce 270 hp all up. The SC12 is a 1.2 liter per rev blower, and its okay for an easy 230 hp.
The cubic feet per minute is calulated like this.
If it is geared 1:1, then 1.4liters per rev for a 250 reving at 5500 rpm is 7 700litres in a minute (1400 times 5500).
1 cubic foot is 28.3 litres, so thats 7 700litres divided by 28.3, or only 272 cfm. Thats if there was no loss of flow due to heat. In fact, the cfm divided by 1.6 gives you how much hp potential there is... about 170 hp. If you over drive it to 1.5 times the crank speed, thats 408 cfm, or about 255 hp.
The blower, at that speed, takes on lots of heat, and is not able to produce a huge amount of power.
Svens blown and slammed blue XF 302 Cleveland had two simply because after the 250 hp mark, it is doing nothing but heating air. Put two on, and theres a 500 hp potential.
My friend Richard has a Commodore VN with a 3.8, and Rod Hadfields SC12 kit. Theres 170 kw, up another 35% on the base 125 kw V6. It kicks but, and is switchable. Its noisy, but it produces enough power in a 1300 kilo car to do low 14 second quarters, something a 40 000 dollar, 400 kilo heavier XR6 Turbo can't do as easily. The kit cost him a little over 2000 NZ dollars, and has worked flawlessly.
Enjoy finding the under bonnet space. Your lucky to have a Cortina. The Falcon engine bay is rather restrictive with the spring towers. Remember, its smaller than the Selectair air conditioning pump, so it should be as easy to set up. Use the TE Cortina arrangement for its a/c option, and take the battery out of the right front and mount the other SC14 where the alternator is. Shift the alternator to down to the bottom, where the axial flow a/c compressors are on XF's, or where the alternator is on the OHC EA's.
pumplus had not a lot of good things to say about the SC14 in a TD Cortina, but the application was a blow through GRA carb set-up, and those carbs are very sensitive to air pulses. There were a few bends in the installation, but it was quite clever, and this is a great one to look at.
The CAPA serepentine drive, used on OHC Falcons, or the Commodore V6 Super charger set up is a good option.
For me, it all comes down to cost. Two SC14 are about a grand over here, going up all the time.
I have a 3.4 litre per rev R034 blower from a Commer truck, it can produce up to 415 hp easily, but is a nasty thing to package. I was going to put that in my Falcon, but the mounting was eloborate, and I wanted it to run an under hood LPG system. Dukeowindsors red XF is my kind of idea of a great package.
