check out pg. 61 of the ATI manual........it gives a lot of good info about the compressor and pulley sizes

It says our compressor at 7psi has a maximum RPMs of 60,856 RPMs, with a pulley combination of 38/27

it also says the total maximum RPMs of the compressor is 80,000......and that should not be exceeded

with a maximum of 80,000 RPM's, the most aggressive pulley combination we can have is a 42/23, assuming we retain the same cog belt and have the stock rev limiter

that should roughly yield about 14-15psi as the limit of this compressor.........according to the formulas in the ATI manual, this compressor isn't capable of 20psi

 

Very interesting....... This is true..
http://www.procharger.com/models.shtml

 

Bill, I'm curious what e-manage does. Will it replace one or more of the various controllers you already have?

--Steve

 

Damn thats ********, It was advertised as being capable of 30psi. I guess it is on a 1.8 L engine.

So what pulley combination would be required for 80k rpm on the unit with an engine speed of 7500...........I assume this will still produce the same 14-15psi.

I guess ATI is kind of shady after all.

Thanks

Robin

 

To calculate that you need to do the following formula... Impeller RPM =6.5515x(N1/N2)x engine rpm

N1=Number of teeth on pulley 1
N2=Number of teeth on pulley 2

For example....
N1=42
N2=24

N1/N2=1.75 x 6.5515 x 7100rpms=81396rpms (impeller speed)
N1/N2=1.75 x 6.5515 x 6800rpms=77962rpms

Stock set up
N1=38
N2=27

N1/N2 = 1.4074 x 6.5515 x 6800rpms = 62700rpms
N1/N2 = 1.4074 x 6.5515 x 7100rpms = 65466rpms

 

Steve, the E-manage will only be used to adjust some A/F uptop that need to be fine tuned. Other then that, I would use it to control larger injectors if and when I do need them, plus I can do some logging with it. I will still be using the Aeromotive EFMU that comes with the ATI kit, and also will still use the J&S Safeguard because the E-manage cannot detect knock and will only retard timing based on RPM, where the J&S can do both and retard based on boot too.

Bill

 

So a 41/25 Combo would use a stock belt and would be:

N1/N2 = 1.64 X 6.5515 X 7500 = 80,583rpm's

And one would assume this would make about 14-15 psi????

In case there is any confusion about the higher rpm number the motor is being built with this in mind.


Robin

 

Robin,

According to ATI the MAX rpm of the impeler is well into the 100,000 range..The 80,000 is just what its warrantied up to...According to them..The most aggressive pulley combo you can go without changing the rear pulleys would be the following
N1 Main Drive-from 37 up to 44
N2 Smaller drive belt 29 down to 22
44/22 being the highest combo..

 

pg. 62 of the ATI Manual:

"ATI is proud to offer a twelve month limited warranty on its Procharger supercharger systems and a thirty-six month warranty on ProCharger superchargers (supercharger only) with eligible, factory installed pulleys........."

pg. 64 of the ATI Manual:

"Participants must have ordered the Intercooled ProCharger C-2 with the 7 psi cog drive pulley system, and must agree to maintain this pulley, and not remove this pulley or disassemble or modify the ProCharger in any manner........"

i'm not sure how they can say that it's warrantied up to 80,000 RPMs........the 7 psi system will not hit 80,000 RPMs........and going beyond 7 psi forfeits any warranty.......what they're saying doesn't match up

 

Look..Im just relaying what was explained to me by the tech..Thats all..

 

I think you answered your own question. Sounds like it's a year up to 80,000. Though if you want the 3 year, it has to be a 7psi kit they sell wiht no pulley change. Thats the way I read it.

EA

 

Relax killer......it wasn't a personal attack

 

i suppose thats possible......but when i read over the warranty as a whole, it seemed to be saying that any pulley changes voided the warranty

 

I would assume any pulley change would void the warranty,but when I spoke to tech he said its warrantied up to 80,000 rpms..I didnt ask if that was on the basic warranty or what not..Hopefully no one here will ever blow up a C2 compressor to find out..

 

my compressor gets pretty damned hot just with normal driving.......i can't even imagine what 80,000 RPMs would do to it