i found the attached study, dated 10/21/05, on the turbo magazine site. keep in mind that vortech paid for the study.
http://www.superchargersonline.com/i...1sc_report.pdf

 

If you look at the blades used between both and the boost maps . Vortech wouldnt have to pay for it to come to the same conclusion . Plus the oil temp between the two makes a big difference . Vortech has the same artical on thier web site now

 

here's ati's response:
http://www.procharger.com/consumer_alert.shtml

 

interesting. So what are the hp to the wheels of the vortech vs ati?

 

strangely, the comparos done on the ati site compare intercooled ati kits to non-intercooled vortechs.

 

What numbers have you seen for both intercooled and non-intercooled vortech and ati?

 

all of the math and results look legit.

 

Dont you just love competitors fighting back and forth . When I scanned over tha artical on Vortechs web site , I didnt know they were going after ATI...but there is no mistake that ATI is after Vortech...lol

 

hehe. ya, ati certainly has taken the gloves off. sc fight!

 

ATI is just a terrible company to deal with. Back in 1994, ATI was just getting off the ground. They had just developed their 87-93 mustang SC kits w/intercoolers. I had just purchased a 94 GT and wanted one of their blowers. The hype of their ads and intercoolers got to me. I didn't want a Vortech because everyone had vortechs (back when they had A trim and B trim blowers).

At that time, ATI was very new and I would deal directly with the owners, Dan and Ken Jones. Anyway after several months of delays, I finally recieved the kit. All looked well enough..........

That was until I decided to get it installed. I took it to the best Mustang shop in America...Crawford Performance. At the time, they were building the fastest Supercharged Fox-chassis mustangs anywhere (high 8s, low 9s). Obviously, they knew what they were doing when it came to mustangs.

NOTHING FIT!!!! It was obvious that ATI had never even test fit the blower bracket to a Mustang. It didn;t even come close to fitting. The cast/machined bracket was a mess. A few days later, ATI sent a new bracket...and it fit, but the way that the power steeering pump had to be relocated, it caused the power steering pump to leak heavily (had to fill it every 3 days.)

next issue......fuel pump. The in-line fuel pump that ATI supplied had to be the world's loudest fuel pump. It was louder than the blower whine!!! I had someone stop me in Ft. Lauderdale on Las Olas Blvd, and ask me if my car was "okay." All I got was laughs and jeers from the guys at Crawford over that fuel pump.

Next....the intercooler was so tiny, that it was a major boost restriction. Major.....or maybe it was the small 2" or 2.25" tubing,too. Later they upgraded to a 3-core 3" intercooler and tubing. Do you see that ATI had no idea what they were doing!! They were putting product on the street and having customers be ther R&D dept.

Next....The blower was a P600B. The "B" stood for "billet" as in the impeller. You should have seen tis hunk of poorly machined chit. It was a straight blade impeller with some of the worst maching marks left on it. ATI was pushing the "billet" as being better quality than traditional "investment cast" impellers. Wrong again!!! Now, they use cast impellers!

Finally, did I mention that this 11-12 psi kit, made a whopping 4-5psi!!!!!

Bottom line, I SHOULD HAVE BOUGHT A VORTECH!!!!

 

a lot has changed since 94, remember thats 11 years ago!! technology does CHANGE buddy..i got 6k on mine...NO problems ...and already killed 2...yes 2 vortech 350z's ...peace

 

there's so many variables in a race to say one kit is better than another. What numbers were those cars putting down vs yours? How good of a driver are you vs them? How much traction do you have vs them? Too many variables for a clean cut answer. Those 2 vortechs can just up their boost. Then does that make them the "better" kit if they won? Can't determine it with a race. People are doing 450-475whp on the vortech kits. I don't think i've seen past 440whp on the ATI

 

I agree that things change, but I wouldn't give them the satisfaction of ****ing me again!!! I'm glad that the ATI is working for you. They only had one way to go if they planned on staying in business. I just wouldn't take the chance on my dollar and my time.

...and I have tried Vortech. I put a V1-S trim on my '96 Cobra. I made 536 rwhp and 460 ft-lb of rwtq on 10.5 psi of unintercooled boost (93 octane.)...and the vortech kit was perfect.

 

I think ATI has a vaild argument on the oil temp issue...to a point

In real world applications, you are usually on "on boost" for short amounts of time. There probably would be time for the oil temp to skyrocket as it did in that test.

Conversely, if an ATI user was trying to perform a "top speed" run, you might run into issues.

Back on my ATI P600B, it was engine oil-fed, like the Vortech. ATI probably switched to a self-contained system to ease packaging to appease the concern of some enthusiasts regarding tapping into the oil pan for an oil return. *just my opinion*

 

I lit up an ATI pretty bad from a stand still with my vortech....... he might be reading this i should be quite he was at the east coast meet lol......... but i had to defend the vortech guys that the ATI guy beat sorry haha

 

The ATI kit has been out for quite a while . They STILL havent done any thing to address timing with there kit . So unless some one is on a site like this one , that knows the kit can blow motors with out addressing timing...then guys are still blowing motors with the kit

 

j & s safeguard took care of the timing issue..also a good tune ...377rwhp 320tq ...stock exhaust....a little help from the drag radials and speed shifting is all that was needed...not trying to hate on vortechs but there will always be someone on the other side 2nd guessing or defending the other people.just my opinion not trying to bash vortech..maybe they were bad drivers cause they said 400rwhp on both ....both also had drag radials...

 

i've been on the boards for a while now and i was on the boards when ATI prochargers first came out (im sure a lot of you other guys can vouch for what im going to say) and when the prochargers came out they were NOTHING BUT TROUBLE. Now that people have blown up their engines with the ATI they figured out how to fix it, and from their R&D we know how to properly run an ATI on a 350z. The thing i dont like is that its been years now since they released it, and from what i know they still don't include everything you need in the kit to run it safely without blowing up the engine (AKA J&S safeguard mentioned above). I was going to ATI my car last x-mas but after looking into all little extra stuff and extra tuning involved i'd much rather go with a vortech (not to say i choose vortech first, i like turbo better).

 

i figur it this way if your going to get a a none roots style blower then you might as well go turbo. almost the same concept just better results. that is the one thing i love about the roots style blowers is that the power is right there but if im going to have to wait for my boost to kick in hard i might as well go with a turbo. just my 2cents

 

no they're still different

the tq curve on a ST or TT is going to have a huge hump in the middle of the rpm band

the vortech or ATI put the tq at the end of the rpm band so the higher you rev, the more torque you get vs having too much too soon and spinning out the tires.

Yet lets you drive around town while not being in full boost all the time, only when you mash the pedal