which is better a centrifugal s\c or the roots type

qwkstang97 · 01-05-2003

Just got a couple of qwk questions
which is better a centrifugal s\c or the roots type that ford sells the price seems comparable. And how much power should be expected from each on a stock 97

LilBluP1 · 01-06-2003

I suppose a lot depends on what you are looking for, street or strip. I personally have a daily driver and it is slated for a roots style charger by Allen Engine development (www.allenengine.com). Saleen also makes a roots too and both are intercooled. If you plan to go with centrifugical consider a gear upgrade as well, something like 3.73 or 4.10. Roots deliver full boost at around 1700 - 2000 RPM while centirfugal reach max boost around redline. The most popular one I see is the Vortech and everybody I talk with says they are great.

qwkstang97 · 01-06-2003

Thanks for the info I just got it painted so the s\c may have to wait.
I know the ford unit runs about 3100 do you know what the saleen runs for price.

LilBluP1 · 01-06-2003

Saleen kit is $3600, Allen is $3500 you should expect about a 35 -50% increase in power, keep in mind that is across the curve and not just peak. Both use the Eaton M90s which is simalar to the unit on the 03 Cobra. The Cobra uses the Eaton M112. I highly recomend looking at the Allen web site as they have a great FAQ and a link to Jim Roal's web page. Both sites contain a great deal about supercharging and the different characteristics envolved with each. Hey what COLOR!

LilBluP1 · 01-06-2003

Here's the web site for Jim Roal not fancy but has a butt load of info

http://home.att.net/~jroal/

qwkstang97 · 01-06-2003

thanks again for the info. It was black from the factory but I see too many black gt's so we mixed green pearl into the black base coat. It looks like emerald dust on black velvet when the light hits it. when it gets done I will post pics. It looks demonic.

blown89stang · 01-06-2003

Ok here's the deal the roots are great for a mild daily driver. They do reach full boost at a lower rpm and are very torquey. But a centrifical blower your going to see a ton more power through the mid to top end. They are easy to maintain and the aftermarket world is huge for these blowers especially a Vortech. You can get more boost by changing a pulley where as with a roots, you have to change the whole snout and there's not a whole lot of options for them. It all depends on what you want, and I'm not knocking any roots owners, but the bottom line for the money your going to have more potential and more choices and more power with a Vortech style blower. You just don't see a renegade racer using a roots style blower or any racers for that matter.

jeff's01 · 01-06-2003

Here is a link to Kenne Bell. Explains the roots and is great information on a Supercharger sytem. FYI...You dont change the snout, just the pulley for more boost.

http://www.kennebell.net/misc/class-act.htm

blown89stang · 01-07-2003

Quote:

Originally posted by jeff's01
Here is a link to Kenne Bell. Explains the roots and is great information on a Supercharger sytem. FYI...You dont change the snout, just the pulley for more boost.

My bad, for some reason I had it in my mind that the snout had to be changed.

qwkstang97 · 01-07-2003

The car is going to be a daily driverand show car. i don't want to go to radical just enough to run with the multitude of inbred camaro and firechicken's. I already have 3:73's and a mac o/r with flows but just don't have the go to go with the show. Thanks alot for the info guys

95MGTS · 01-11-2003

Just my lousy two cents but I don't believe the Kenne Bell's are root blowers but twin screw designs. Similar but make the boost a little different with the twin screw being much more effecient. Other than that I don't know much about them. Obviously I'm biased and lean towards the centrifugal. Would be nice to have some of that low end torque though. My car doesn't wake up until about 3000rpm and then pulls like a frieght train from 4-6000rpm.

Saleen Owner · 01-27-2003

You recon' John Force run a Vortech? Yeah right!

93 red snake · 01-27-2003

6000 hp compared to 500hp not a good example. but in any form of mustang racing like ffw or wfc have you seen any car's using a roots blower?

EZBNME · 02-02-2003

It's not a good example to compare a track only race car to a street car either. I think it would be fun to see some pro Mustang racer show up at the track with an alcohol injected 14-71 or a like roots blower on top of a 400 stroker. The rules don't allow it. On a street car the twin screw blower can add over 100 lb-ft more torque in the lower rpm range over a centrifical blower. Average power is what accelerates. I still like throwing in the fact what Ford has done with the heavy 2003 Cobra. This car is very quick and with several mods can hit 10s without going inside engine. This is a good example of what a street car with a roots style blower can do.

93 red snake · 02-02-2003

several street car's go into the 9's in real street classes. you know drive 30 miles and then race. these are street driven street legal cars!!! and never 1 time have i seen a roots style blower. they use either novi 2000 or vortech ys trim or d1-sc or f1-sc's. yes the 03 is a great car with a great motor!!! but anything other than the o3 cobra does not have the built bottom end or low comp pistions. yes roots blowers are great blowers. but if they were better wouldn't you see more car's that race running them. and i'm not talking about pro 5.0 cars.