yeah...... discuss.
Cuz from what I'm looking at, that's not going to spin fast enough to make boost.
www.gmscf.com
it says it makes 5 lbs. of boost at 34,000 rpm. so maybe 1/4 lb. boost at 6500 rpm in our cars lol.
What I see as well. Only way it would work, I think, is if there was a gear increaser from the pulley to rotor to spin it faster.
stephen steele wrote:it says it makes 5 lbs. of boost at 34,000 rpm. so maybe 1/4 lb. boost at 6500 rpm in our cars lol.
not very familiar with gears?
87 Firebird
All stock...........lol.
Looks like a homemade centrifugal S/C to me.
Lol at the one bid. Its probably a honda or RX-7 owner that thinks 34k in an achievable rpm in their maching.
I imagine that they copied and pasted the "history" of S/Cs. The only way for it to be efficent is to put the exhaust turbine and housing back on it.
Tinkles
2003 Cavalier 1SV
Bagged and Blown
randizzle wrote:stephen steele wrote:it says it makes 5 lbs. of boost at 34,000 rpm. so maybe 1/4 lb. boost at 6500 rpm in our cars lol.
not very familiar with gears?
yes i know gears will icrease the boost with less rpm but damn how are you going to make it work, you would have to make a crap load of brackets to hold pullies, turbo, and im pretty sure more stuff. dont seem to be worth the hours of frustration. but if it can be done very cool
5:1 Driving to driven ratio = 25,000 rpm @ 5000 Crank RPM.
Seems reasonable, I dont believe those efficiency numbers, however, you see most compressor maps start making efficiency numbers in the mid to high 50k range, on up through 120k. I doubt there is going to be hardly any thermal efficiency in something like that without having to go to an absurdly sized compressor.
Buildin' n' Boostin for 08' - Alex Richards
What a joke!! you would HAVE to add some sort of 'step up' gearing to get it to spin remotely fast enough to make boost. For example Vortech brand centrifugal s/c's use an approx. 3.5:1 ratio. From the numbers I've seen those impellers need to be spinning over 20,000 RPM to make any sort of boost. Here's some math... RPM * crank pulley size / s/c pulley size = impeller speed. So with a redline of 6500, crank pulley of 7" and a s/c pulley of say 2" you get... 6500*7 / 2 = 22750RPM AT REDLINE. So it would barely make boost, if any alt all.
If these retail at $1200 why not just spend the money and get a Vortech or something similar with the proper gearing in it.
Edited 1 time(s). Last edited Thursday, April 02, 2009 9:54 PM
Ya.... thats probably a POS that wont work at all...
But there are fully functional belt driven "turbochargers" out there that put out high boost numbers...... there called Centrifugal Superchargers....... look it up LOL
And yes.... a gearing system is definatley used on the real ones that actually work.
I'd think you people would know that LOL... at least Tinkles knows about them.
I wish they made a setup for our cars.
Procharger is the first (if not only) one that comes to mind.
http://www.procharger.com/
^^^^^I wonder how that compares to the stock supercharger on the SS with a smaller pulley?
And did anyone notice that the fins on the Ebay one didn't look right?
Probably a lot less instant power, but pulls a lot better on the top end.
www.gmscf.com
Spinning it at 34,000 RPM really is not that big of a deal. You just need a large drive pulley, and a small input shaft pulley.
PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
Did any one else notice the lack of oil feed/return connections? Looks like they are using a sealed bearing in it.
Just curious but did anybody actually read the auction post? Since he furthers and talks about the bearings and such and even mods to generate 16lbs. Just thought I'd throw that out there since there's lots of posts about crap that seems to be answered in the listing.
What I'd like to know is did he mean 16lbs psia or psig? LOL
"Never argue with an idiot. They'll drag you down to their level, then beat you with experience!" -Anonymous
thats "one expensive paper weight". its the compressor side of a turbo, but the definition of a supercharger is belt driven. dont know why theyre calling a a turbo/super. turbo uses a turbine to drive the compressor. and the red so flipn tacky
Working on obtainting an M-Class license... ?? Hint: 2 wheels.
^It should be called a centrifugal supercharger and honestly the whole concept is pretty standard in the market. It's very similar to the Vortech systems...so it's not like some weird new idea. It's been done. But to clarify, it is not a turbo nor a "traditional -roots" supercharger.
"Never argue with an idiot. They'll drag you down to their level, then beat you with experience!" -Anonymous
Toronto Cavalier wrote:thats "one expensive paper weight". its the compressor side of a turbo, but the definition of a supercharger is belt driven. dont know why theyre calling a a turbo/super. turbo uses a turbine to drive the compressor. and the red so flipn tacky
Wrong, The definition of a supercharger is ANY device that forces air above atmospheric pressure into an engine. A "turbocharger" is not really a turbocharger, in fact it is a turbine driven supercharger, hence the name turbine supercharger, and the shortened version, turbocharger.
There are a ton of different styles and designs or superchargers, the methods used to drive them differ but even those you refer to as turbochargers are not truly turbochargers, they are superchargers. belt, turbine, chain, gear, or any other drive method regardless...
A supercharged engine can have what we call turbocharger, roots type, screw type, lysholm, radial, axial, tangential, centrifugal or any other means or forcing air in, they all do the same thing...supercharge the intake air.
Buildin' n' Boostin for 08' - Alex Richards
Weebel wrote:I wish they made a setup for our cars.
I'm working on making my own setup using a Vortech V9. I'm hoping to have it running in the next couple months.
The thing would work.
With the self lubed bearings (it does say that) I don't know for how long.
LOL at the "understand gearing?" poke.
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
Thats it... Vortech is the other one I couldn't think of...
And A supercharger is driven mechanically by the engine, and a turbocharger is driven by exhaust gasses.... regardless of the design.
otherwise it just looks like somebody broke there turbo and made this from bits the had laying around..
