[EZBNME]

The 03 Cobra comes stock with only 8 lbs of boost and 3800 lbs. The centrifical blowers do flow more upper rpm volume than available Mustang root blowers. Most street cars are not built to handle this much volume. We are talking about street cars not a 9 second race car running 18lbs of boost with a license plate. Big deal 30 miles.
I realize the air and water coolers available for centrificals will allow more boost than a twin screw blower. Centrificals will never have the low and mid range power of a roots. This is where street cars need it.
The fastest drag cars in the world run a roots blower. I would rather have an intercooled turbo myself but I'm to loud to be this quiet.

[93 red snake]

come to wfc 6 and count how many car's run a paxton, vortech, procharger or powderdyne. not just race car count the showcars. car's in the parking lot cars on the street and tell me what's on most of the car's. it wont be roots blower's. and nobody here is talking about top fuel car's. were talking mustangs. i'm not denying they are great blowers they are. but i can't hook up the power i make on nitto dr right now with my novi 2k and i have all the suspention goodies. i can only imagine how bad it would be with a roots. and i noticed paul svinicki of paul's high performance one of the leaders in the mod motors aftermarket just got his 03 in the high 10's but thats on slicks and a straight axle swap and spraying nitrous. does that count?

[EZBNME]

It does not matter how many people run centrifical blowers. This does not mean they are better on the street. Most people just follow the crowd anyway. You already know the roots blowers make more average power than a centrifical. So why do you think centrificals are faster when average power is what accelerates a car.

[93 red snake]

a million people can't be wrong. if they were better more people would run them PERIOD!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! do you have a supercharged car? or have you ever been in one?

[nestle_2000]

I think we can all agree that the two blowers are definitely for different applications. The roots style is cool. They give more power in the lower regions for sure. But put that with a heads, intake, cam combo...most people can't use that on the street. It doesn't hook up etc. On slicks, etc...on the track, sure you can use them, all the power to them.

On the street, a centrifugal has a steep power curve. It makes way more power at the top than throughout the range. You can easily put an intercooler/aftercooler onto centrifugals. This'll allow for more boost due to the lower boost temps.

[EZBNME]

93 snake, of course! One was even a black 93 Cobra. You can believe all you want about centrificals it's your opinion. If it's your thing to only have max boost at redline thats ok with me. Street cars don't cruise around at max rpm. You are mistaken to believe the roots blowers are slower on the street. It's all in the combo and how much volume the supercharger is able to supply before it stacks into lots of boost. Tell Ford their heavy Cobra and lightning would perform better with an S trim at the same boost level. Turbos are even a lot better than a centrifical on the street. Are you going to argue that also?

[93 red snake]

turbo's like novi's and vortech and procharger's make hp when spooled up also near redline. i'm not sayin in the least roots do not make power they do. just get some nitto's and find out how much hp the will hold down low. thats why turbo's are great the bring the power on slower as they spool up that why boost controlers are so popular. they help you keep the power planted. same as a novi.

[EZBNME]

Turbos are nothing like a centrifical supercharger. Turbos spin over 100K rpm and build full boost in the lower RPM range depending on compressor size etc. This is why turbos have better average power and accelerate car faster. They use no power to turn compressor other than back pressure. Remember the heavy Buick GNs of the past using an automatic/V-6 combo(engineered)?
These centrifical kits today are just to much money with a lack of sense by the manufacture for the intended use by the average buyer. Look at people puting 8-10lb kits on a 10.1 CR 4 valve Cobra on pump gas. These FMUs are even more ridiculas after spending $3500... These kits should be engineered with a complete fuel system including injectors designed for specific combos for people to match taking the guess/tuning work out of it. People end up spending a lot more money just in tuning and fuel system. It kills me to see someone spend $4000 on a supercharger/fuel system only to put it on a stock block engineered to handle 250 horse.

[93 red snake]

a centrifical supercharger is half of a turbo and they are similar. small turbo's spool quickly and make power quickly but can't support much hp. bigger turbo's support more hp but you have lag waiting for them to spool up. and the more they spool the more power they make. just like a centrifical supercharger.

[EZBNME]

Turbos have waste gates limiting volume output (boost) because of the speed they turn. Centrificals are speed limited as you cannot overspin them. You have to install correct pulleys vs max engine speed vs desired max boost.
Turbos make boost much sooner than Centrificals. Why do you think auto manufactures don't use centrificals? I can build a single turbo kit with an intercooler for $1500. I can fabricate my own headers, and tubing though. Turbos need cams with negative or 0 overlap.

[93 red snake]

quit posting and build it then!!!!!!!!!!!!!!!!! then i have a supercharged car for you to run. better build it good you will need it.

[Fordgazm]

qwkstang97 I agree with EZBNME go with a roots blower youll love the torque. And EZBNME I'm not doubting you but can you ex plain how you can build a turbo system for $1,500. P.M me if you want too cause i'm curious. :

[nestle_2000]

Probably a junkyard turbo then. He's welding all his own pipes and stuff though. I have a friend that can sell me garret turbos for pretty cheap. In fact I was contemplating of designing and building a twin turbo for my stang. I would miss the whine of my charger though.

[95MGTS]

I'm biased since I use a centrifugal but at times, I wish I had a bit more hp/tq below 4,000 rpm. Most of the time my driving is light to light and when on the freeway, there is never any room or time to blast to 6,000rpm. On the other hand, I'm not always into boost so I'm guessing I'm not putting too much stress on the internals. My gas mileage (which sucks regardless) is helped out a bit but that really doesn't worry me. I didn't mod the car to get good gas mileage If I ever need more power, I simply step on the gas pedal another inch or so, and maybe downshift, to get into my most effective rpm range, 4-6000rpm. From 3-4 grand, the pull isn't bad and would probably be a match for most non-modified cars out there. From 4-6 grand, my car pulls like a banshee.

Regardless, every set-up has its place and if its matched to a good combo, like the 2003 Cobra, then it's a hard to beat platform. I'm still not sold so much on the roots but a twin screw design like Kenne Bell would be a blast. Spools up like a turbo, full boost at low rpm's, but probably (IMO) much less expensive for initial purchase and tuning (brand new at least).

[93 red snake]

i have driven a couple buick gn's and several other turbo car's and have never seen one that did not have turbo lag. and most of these cars power comes on around 3000 to 3500 not much different than my novi. and on my car when i shift my rpms never drop below 3500 so i'm always in boost. and also if you want boost sooner put a smaller pulley and shift at the at the max boost you want instead of rpm. this is the dyno sheet off my old motor it was a stock shortblock mildly ported gt-40 heads, long tubes and offroad h-pipe and pro-m 75 everyting else was stock 93 cobra with a novi 2000 making 10lbs of boost. i'm not saying one is better than the other but both make awsome power. i can't wait to get my new combo on the dyno!!!!!