MelloYellow

Not sure if this is a good way to compare them, but does anyone have the flow rates for the following blowers?

ATI P1-SC 1200cfm
ATI D1-SC 1400cfm
Vortech V9 G-Trim 800cfm
Vortech V2-SC 900-1000cfm
Vortech V2-SQ 1000-1100cfm
Others?

For comparisons sake..
What is the right way to compare blowers with different cfm ratings? Heat ratings would be higher with lower flowing compressors also, right?

Vortech did say diff manufacturers use different testing, so may be apple to oranges. Vortech also says you'll see more boost with their setups since you blow thru much less tubing than air-to-air setups. Probably 3psi more. Also, less strain on the crank since you don't have to spin as high to make up for the air tubing lost psi.

<small>[ November 02, 2002, 03:07 PM: Message edited by: MelloYellow ]</small>

SJH

well I know in my case the 800cfm max rating of the g-trim is low.

they rate the unit at 62,000rpm for the efficient max and 65,000rpm the absolute max.

I run 67+lbs/min at only 60,000 impeller rpm.
I have done a little porting work to the blower to increase flow.
Converting mass flow to cfm is tricky because of density.
But 67lbs is right around ~970 cfm.
I have 5000rpm left in the blower too!

AndrewB

Head Units Comparison

Gold Phoenix

iTrader: (1)

Compressor Maps are a better way to see differences in each supercharger. Vortech has some, but only on their older units. Everyone else don't advertise a compressor map. When I get asked for them I just get sales papers. If someone has any maps on ATI's I would be interested.

ZYA_LTR

The thing that the comparison above doesn't show, is the step-up ratio of these blowers, kinda like the rear-end in your car, that makes a big difference, on one of the trucks at uor shop, a blown 4.3 s10 making about 500/550 horse on a d-1sc making about 15 #'s, when we changed over to an F-1, we were making 22 #'s with the same pulley, all a factor of step-up ratio, how fast, and much boost a blower makes.

ZYA_LTR

PHOENIX is right, the best way to compare blowers is by compressor map, but most people don't know how to read them and really understand them, so they go by what these companies tell everyone, if you go to ATI's site, they list all there units, and all there specifics, but no maps, sorry.

MelloYellow

Agree. I learned how to read the compressor maps at Turbonetics a bit. Anyone have compressor map info for Vortech or Procharger head units?

frcefed98

iTrader: (16)

900cfm - 3.05 step up for my lil powerdyne and
1400cfm - 4.10 step up for my new D1-SC!!!!
The difference between the two is very noticeable I cant wait till my 500 break in miles is up and off to the dyno I go to see how much different <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
This butt dyno thing just doesn't do it for me.
J
<img border="0" alt="[Burnout]" title="" src="graemlins/burnout.gif" />

Gold Phoenix

iTrader: (1)

There is a series of formulas on how to find out what size of turbo or supercharger you need. Also it gives you an idea on how good of a intercooler you need since you can calculate how hot the compressed air charge is.