Planing to suprcharge my z28 95 but i cant decide wich blower i should buy, I donīt want peope to notice that the car is supercharged and i dont planing to go for more then 6psi now. But im afreid thats gona change soon . So there for i have same questions.

1. How quit is the vortech sq?
2. How much hp advantage will the vortech have over the powerdyne, both with 6 psi pullys with my mods?
3. In wich rpm will they begin to make boost?
4. How much boost do you think i will se with the mods in my sig.

As i have undrerstod the poerdyne is totaly quit and arnt capeble to upgrading the pullys, wich could extend my engines life

 

First off, I don't know too much, but I can offer what I do know . From what I've heard, people will still hear the SQ somewhat. Plus with your mods it'll be a little louder than on a stocker (cam will make the blower idle louder). I haven't heard any good things about Powerdyne's now thats ofcourse just me. I would go with Vortech. As far as people not knowing you have it, what about the guages?? Unless you mounted them in the AC vents they will be visible. I JUST got my car back Tuesday with my S-Trim on it. Hard to watch the boost guage and tach at the same damn time haha...but I'd say I start making boost at 3k or a few hundred higher. As far as how much boost, from what I know a cam will really rob a pound or two of boost from you. But ofcourse with your mods you'd make more hp per pound. I don't have one, but look around and see if you can't find a clip of an SQ at idle. If you had any other questions feel free to PM or email me. I'd be glad to pass along any info which I am learning about my blower as the days go by. Hope I helped a tad

EDIT: oh yeah, my guess 4-4.5# with the 6# pulley

 

Well i have the powerdyne 6 psi and i see around 5 to 5.5 psi and i have ported/polished heads 2.00 int-1.56 exh valves, Mac headers Off Road pipe and im running a stock cam .Im making close to 400 rwhp and its not completed yet.Also you can hear mine blower a little not to loud but its there..hope that help's

 

thanks for the answers, keep them comming.

Hmmm have seen in other posts that the powerdyne is totaly quit but that doesnt seem to be true.

GEES97TA have you heard an vortech sq? and if so is it a big diffrense in sound level? and when do you begin to make boost?

 

No im sorry i never heard a vortech sq.I know people say the powerdyne is silent but you can hear mine its not really loud because the car is loud in its self,but its noticable

As far as seeing boost at what RPM thats hard to say i really dont look at the boost gauge Im going pretty fast to take my eye's off the road or to busy trying to get control of the car again after it stop spinning I think the boost comes in at around 2800 to 3000 rpm and mine has a weird feel to it right now i think its because im o stock igntion and its blow out spark..so it has a stuttering feeling after 3000 rpm..But that will be corrected next week it goes back to get the new ignition box and another WIDE BAND TUNE

 

id go vortech

 

I havnt heard the vortech sq but i think my powerdyne is by far the quietest supercharger i've heard on any car. I'd actually prefer it to make more noise than it does. It's too quiet for my liking but i guess it's good for the sleeper effect if that's what your going for. I can barely even hear it at idle. I'm also seeing about 5-5.5 lbs of boost with the 6lb pulley.

 

Who cares if its quiet or not?... in the end... When your boost cravings get up in the future the powerdyne will be useless and the S-trim can go higher... Always think about the future.

 

The Vortech SQ my friend has makes about the same noise as my brother's Powerdyne.

But, the Vortech has far more power potential than the Powerdyne.

All centrifugals make boost directly proportional to rpm, so it doesn't start making boost at any specific engine speed. For instance, if the blower makes 6 psi at 6000 rpm, it makes 3 psi at 3000 rpm, and 1 psi at 1000 rpm.

Get the Vortech.

Mike

 

Sorry no.. its not linear.. my car makes 10psi at 6200 and at 3000 it hardly makes 3psi...

 

Highlander, maybe that's due to your damaged impeller.

In compressor school, we're taught that bent impeller vanes at the inlet help capacity (boost) at low compressor speeds. Perhaps the fact that this part of your impeller was mostly gone explains low boost at low rpm.

Mine hits 9 psi at the 4000 rpm stall speed of the converter and 14 psi at 6200 rpm.

I'm not sure how the ATI's are now, but the early P600B's had straight impeller vanes, which is old technology. It surprised me that they weren't using newer, widely popular technology. This is why I chose Vortech.

Mike

 

I'm sure systems vary from each other but I feel the Powerdyne is quieter than the Vortech. I also feel the Vortech has more capability for growth and power if you decide to go that way. The Powerdyne is easier to install (no hole in the oil pan) but only slightly. I can't hear my Powerdyne at all and have had people comment at dyno days that they didn't know my car was supercharged even after my dyno runs since they didn't hear it.

Since my T/A is no longer my daily driver, I would like a little more (some) blower whine for cruise nights. Of course I do like the stealth feel and look of surprise when this 'ol man stomps on a few unsuspecting youngins' since they think my T/A is stock.

I love my Powerdyne, BUT for about the same cost (I believe they are very close in cost now) I would opt for the Vortech.

Later ... Larry S.

 

Damn.. well I sure hope to see that much boost down low!!!
That gets my hopes up... I saw only 10psi!!! If i see 12 means that i can see 7psi at 4000?? more or less... that would be very very nice...

 

The powerdyne is almost silent. The vortec is deffinetly louder. The powerdyne is virtually non upgradeable. They don't have intercoolers and can't support very much power. Why not go with an ATI? It comes with an intercooler standard. You can upgrade these kits to run however fast you want to go. The p1sc is a little noisy, but is not as loud as the p600. You'll probably see your biggest gain with an ATI.

 

I beg to differ.

The Highlander made over 500 rwhp with an S-trim non-intercooled Vortech.

Burger made 540 rwhp with a non-intercooled Vortech S-trim.

Add the Vortech intercooler with the S-trim and you find cars like LJ's that run 9.90's at 140 mph with a hydraulic cam, through the cat. converters, no Nitrous.

Rich Krause made 600 rwhp with a Vortech S-trim and water injection (no intercooler otherwise).

So, I wouldn't say they can't support very much power.

Mike