ATI Procharger Kit

Hi, I installed a procharger kit on my 05, C6. it won't put out any way near the advertised
H.P., but did pick up about an additional 100 HP. the car runs nice! I would like to find the other
100 HP, that ATI advertises. (they advertise 600HP)
Ray

Your SC pulley is too big a diameter.

Change the pulley on the supercharger for a smaller diameter and have it re-programmed afterward. I had to go through four progressively diameters (four inches, 3.75 inches, 3.5 inches, and 2.75 inches, before I got the one I wanted dialed in -- I can go smaller still and get a lot more HP but I have enough and it drives so sweet now I just want to leave it alone.

it has 6lbs boost at present, and has 450hp on the RW. what boost are you running with the smaller pulley? I just figured they (ati) would have supplied the proper pulley. I am trying to locate a good tuner that could tune it with the smaller pulley. thanks very much for the advice.
Ray

I don't think there is really such a thing as the "proper" pulley. Its all about what the customer wants out of his/her car. Even if they supplied the smaller pulley with the kit instead of the one they did include somebody else would think it was too much boost and want a bigger one. Its the beauty of personal preference. Oh yeah and by the way...congrats on your new supercharger. I want to put a Maggie on my car so bad, but I have a wedding coming up and have to focus my money there for now.

I contacted a corvette tuner, and will get some work done in a month. good luck with the wedding. I'm an old guy (64), so hopefully I wont get involved with any of those.
I installed the procharger myself, how-ever I have a auto lift, and just about every tool imaginable. I would not want to install one without the luxury of a lift. thanks for the reply!
Ray

quote:

ORIGINAL: raytools

it has 6lbs boost at present, and has 450hp on the RW. what boost are you running with the smaller pulley? I just figured they (ati) would have supplied the proper pulley. I am trying to locate a good tuner that could tune it with the smaller pulley. thanks very much for the advice.
Ray

First, I think it is your tune, not the SC, given what you say.

I have a Procharger D1S and I am running a 2.75" pulley at the moment - I have several pulley sizes to run and as a daily driver it likes this best although even smaller can build more boost. I have only a max of 4.5 lbs boost. Several points to keep in mind: I have 427 cubic inches, and heads to die for (Patriot III heads that were then ported and flow tested to 347" flow at .6 inch) and a ported FAST manifold, etc. As a result, a blower has to work hard to build pressure on this engine -- it sort of sucks the air out of it first: this same SC with the same pulleys on a stock LS6 puts out about 9+ lbs. My 427 puts out right under 510 RWHP normally aspirated -- and is right under 600 RWHP at the moment at 4.5 lbs boost, and can do 640 at 5.25 lbs with a slightly smaller pulley and racing fuel at the strip: it was made to go to 800, but I get belt slip beyond what I can do now and would need a new set of pulleys, a new high capacity fuel system and what else? to go higher just don't have the time to fuss with it -- and its plenty fast enough for an old man like me anyway.

I had a Magnusen on the original LS6 in my car for about 2 years. It did a max of 6 lbs boost, and put down about 465 RWHP, so I think you are not too far off: with the slightly greater displacement you should get a comparable 470-475 HP.

quote:

ORIGINAL: PAY2PLAY

. . . but I have a wedding coming up and have to focus my money there for now.

Well, congratulations are in order for you, too. I highly recommend marriage but you need to go into it with your eyes wide open: it leads to children, which leads to ten plus years of mini-vans with interiors that resemble a combination of the inside of a dumpster and diaper pail, and then college expenses, all of which means a long, long time during which you can only dream of owning new corvettes and superchargers . . . .

still, congrats . . .

Hi. My kit for the LS2, came with a 4.625 inch pulley, and i have not put on a smaller one yet.
It was tuned by Fastchip (Ed Wright) , through ATI. it is actually boosting at 5.5 lbs, at redline.
I just was expecting it to come closer to ATI's advertised figures. It is not the first time I got
caught up in advertising Hype!
thanks for the reply. your vette sounds awesome to me. Ray

I would go to a 4 inch pulley and see what happens. But have it tuned before you even try to get into it - it can go lean in seconds on you and burn pistons.

Hi Lee
well I am now putting out 565 RWHP, after a cam change, and good tune by Dynotech Engr.,
in FtWayne Indiana! the big problem now is traction. I still have stock wheels and tires on
my 05, C6. I ended up with a 4 inch pulley on the pro-charger. its been awhile since I chatted
with you.
the car only has 4,000 miles on it. what type of wheels and tires do you figure would work
good on this set-up. 1st gear is pretty much worthless with the stock rubber!
any way , the car is definitely running strong now.
appreciate any help, and advice.
Ray

That is a good bit of power. Some comments:

Traction. You can go to slightly wider rubber (305s will fit on a C5, I think, not sure). Going to drag radials will also help but you give away all wet weather performance (can't even drive at 25 mph on a moist road).
But to do this right you need:
- to tub the rear wheel wells so much wider tires will fit. Lingenfelter sells a kit - everything you need including hardware to relocate some minor shock absorber stuff. You can install the kit yourself but it requires cutting and using body adhesive: Lingenfelter's Ed Taylor described it as "the type of thing that is really easy the second time you do it." I had a body shop do it, they chargedabout $700.
- put on wider wheels, 11 inch minimum, 12 inch or 13 inch wide. I went with 12.5 inch wide and 18 inch diameter instead of 19 in because BFG drag radials only come in 18 inch -- I run 345 wide. Wheels this wide were quite rare and $$$$ when I bought them, but I understand there are now some ZO6 look alikes in 12 inch width at reasonable prices, and others.
- then wider tires, 335 or 345 section width - Michelin makes one, I think Pirelli, and BFG makes a great 345 x 18 drag radial. Also note, you get only 4000-5000 miles on the street with a set of $340 each drag radials (but then, you get only about 15K miles with the Michelins - performance does have its price.

Do you have a stock bottom end? if so, take it very easy. I've seen several 525+HP blown cars split the block or pistons.

Hi again
the bottom end is stock. I will probably have it changed out this winter.
mean while I'll be checking out some of your leads on tires and wheels, and also, the
lingenfelter kit.
one after market co. is offering the rear quarter kit from a Z06, that would probably
give me room for some larger tire and wheels.
thanks for advice
Ray

What did it do to your gas mileage? Noisy?

And does it eat z06s now?

In my experience the Procharger does not hurt your gas mileage that much. Very likely changing out the cam had more impact on that.

the engine is still quiet, almost as smooth as a stock engine, and I still
got 28 MPG, on the highway.
I have not track tested it yet, but it really pulls hard. traction is the major
problem at present. it definitely has more HP than a Z06. 565 on rear wheels!
I'll keep you posted on future up-grades

Ray

Hey Ray, glad to hear that she is finally putting down some numbers you are happy with. Look forward to hearing what else you do to her in the future.