i have a 1992 Z28 305 TPI. It has 70,000 on it. The car is bone stock in the engine performance category. I am going to put a full borla catback exhaust. I only plan to add a supercharger to the engine. Which kit will be best for this engine. I am not sure who makes kits for this car. What all comes in the kits? All inclusive? which will give me the most performance? thanks for your help

doug

 

ati is one of the better kits.

Vortech is a little cheaper..

I think everyone else is out of the game for thirdgen these days.. You should really search. This question pops up a lot.

-- Joe

 

What exactly makes the ATI kit a Better kit? The fact that they give you an intercooler to make up for there high outlet temps?
I do not like this topic! You will not get a solid answer, just a bunch of people telling you what they have.

 

Well, the i can give a few comments having a few friends with the vortech kits and me having had the ATI kit.

I had done a lot of research on both kits......and frankly when i bought my ATI kit a few years ago they weren't as popular as they were today. They were still kinda the new kids on the block and didn't have much to offer except claiming a bunch of numbers and there were only 1 or 2 people on the board who had them. Where as vortech kits were much more popular.

My engine was very similar to yours, stock 74,000 mile motor and nothing more than some K&Ns and a cutout. I was going 14.4-14.5 @ 93mph with just that with 2.77 gears

When i was researching the blower wars and all the threads the thing that really swayed me into buying the ATI was the performance it gave you over the Vortech. It offered you more boost on pump gas and an intercooler. Now that is all nice and well but if you dont make anymore power than without one, it really is just extra money you are paying.

But with all that i had done reading up on people's kits and emailing people who had both of them, people were going faster with the ATI kits.

I STILL to this day have NEVER heard of a stock 6psi vortech kit with no intercooler put a relatively stock thirdgen into the 12 second range. I just never have, if any of you know of someone who has...please mention here because i would like to ask them a few questions . I had only heard of one person who "said" they had did it and then it turned out to be one of those "oh well its my friends and blah blah blah" but nothing was ever proven via timeslips or videos or even just emails....they weren't getting returned.

Whereas with the ATI kits, i knew of 3-4 people (when i purchased my kit) that were already going 12s with relatively stock motors. One person who did it was PROCHARGED89Z (now his screenname is TURBOI6 and his website is www.darrensperformance.com). I'm not all sure what he had done to his car but i do remember that he had the smaller psi kit (the 9psi) with some 3.73 gears and a few bolt ons and was going 12.70s-12.80s

Another person that i remember going 12s was this guy Black91Formula if any of you remember him.......his car was totally bone stock down to the cast iron manifolds and i believe he had 3.27 gears in his factory 9 bolt and he was going in the 12s.

Now for me, i had the 12psi kit with the 3 core intercooler. My only mods were a fresh valve job, and some edelbrock shorty headers, and a cheapy 12" 2200 stall. With my 2.77 gears on my first pass with 245 Nittos on the car, it went 13.1 @ 110mph with a 1.98 or so 60' time spinning pretty hard. Sadly, that is the fastest i ever got it to go. The car had easy mid 12 second potential i just had multiple problems after the first time at the track. The first time i broke my posi at the track and through one wheel and the same 2.77 gears and leaning out the motor i had it going 13.4s @ 107 through one wheel

So i figured i'd change the posi and run some easy 12s....but i had fuel pressure issues after that first day at the track. And ultimately what it ended up being was just putting too much strain on my intank fuel pump and resulted in me blowing up my motor.

Now, for the differences in the ATI vs Vortech kits.....here are what i know and if i am wrong someone please correct me:

vortech:
-6psi standard
-comes with MSD retard ignition box
-Alternator gets relocated
-no intercooler
-FMU is set at a ratio of 8:1

ATI:
-9psi standard, 12psi optional
-2 core intercooler standard, 3 core optional (and now the twin intercooler system which i HIGHLY reccomend springing for)
-No ignition box with kit (you will need one)
-More expensive of the 2
-FMU is adjustable via a bleeder screw to help you tune

-----That is about it, now i dont mean to flame people here but besides a person who goes around here with the name of "Willie" a lot of people aren't getting the power out of their ATI kits....why i dont know. I think it comes down to not being able to get to the track much and do any tuning to the cars. You'd be surprised how rich your car runs with the FMU and you really have to do some scanning of runs and slowly lean it out to find the optimum fuel pressure which a lot of people here seem to not be doing, or dont know how to because i dont understand why no one has the times some of us were getting a few years ago



later
jim

 

> What exactly makes the ATI kit a Better kit? The fact that they > give you an intercooler to make up for there high outlet temps?
> I do not like this topic! You will not get a solid answer, just a
> bunch of people telling you what they have.

I didn't tell him what I had, I told him what I thought.

I OWN the Vortech. I've talked to ATI owners, and I think the setups are cleaner, although vortech does have a self contained unit now.

Wanna talk about the intercooler? come rest your palm on my plenum after I do a 1/4 pass.. I'd kill for an intercooler.


I think the MSD BTM that came with the vortech is nice. Unfortunately wiring it to a 6A or 6al is a mess, so getting a 6AL with integrated BTM is a better call.

The vortech FMU is adjustable via having to buy an adjuster kit for like 45.00. Adjustable by default on ATI. I don't like either, eventually its going bye-bye and I'll be tuning fuel in the chip if I can get an injector constant low enough at a reasonable pressure for part throttle conditions.

As far as PSI.. I dunno. I've seen 7-8 PSI on my Vortech A-TRIM with a 3.48 pully.. All the ATI people I knwo are mustang guys, and they're running like 20psi of boost.


-- Joe

 

Joe, I know you didn't tell him what you have. I was stating that I do not like this topic because... PEOPLE will only like what they have, and generaly think it is the best. On that note, you have an old outdated A-trim, and you are trapping 110mph on 7-8psi. That is better than most Procharged setup's I have seen on these boards.
89ProchargedROC, if you are looking for someone that has gone in the 12's with a relatively stock car and a Vortech, you are talking to him.
Vortech S-trim (8psi)
SLP headers and cat-back
SLP runners
52mm t-body
SLP converter
26" M/T ET streets
12.82@111mph

 

No worries. I just don't want to be mistakenly labeled. This topic is ugly, which is why I told him to use the search option. True, people have brand loyalty without trying other things first.. Kinda lame, and ignorant at best.

Your going pretty with on that S trim.. I'm wondering if a 3.33 pully will give me much more gain, or if I'll hit the 46,000RPM impeller limit.. Should I go S trim?? Or just intercooler?

A trim is outdated, I agree.. But it does work..

I must admit though, i've seen friends stock 5.0 mustangs run low, low 11's with high boost ATI setups.. (and vortech for that matter, t-trim). Just wonder how long they last.??


-- Joe

 

Outstanding don....finally i've found someone.

Maybe we just know how to ring out every last horsepower out of our setups and other blower owners (ATI and vortech) dont?
*shrug*

 

If you are buying the pro-charger be prepared to wait awhile before it finds its way to your door step. Mine took 7 weeks to arrive and then it was missing the brackets that hold intercooler to car. Those only took an extra 5 days to arrive. The directions need major improvement. They seem to be written more for a camaro install and need more, clear, pictures. Just my 2 cents so far. Once I get to putting car together and get it to the track I'll talk performance with you.

 

procharger delivery problems seem to only manifest themselves during the summer and spring performance rush. we have seen procharger kits arrive at our shop in the dead of winter, inside of a week.