Model Displacement Max Continous RPM Max Peak RPM Max CFM Max M^3/HR Max PSI Peak VE Peak AE SC Blueprint (PDF) W100AX 1.6 Liter/rev 18,000 20,000 1120 1902 30 99 81 100AX W140AX 2.3 Liter/rev 18,000 18,000 1430 2430 30 99 80 140AX W140R 2.3 Liter/rev 18,000 18,000 1389 2360 30 95 77 140R W175AX 2.9 Liter/rev 18,000 18,000 1720 2922 30 99 78 175AX W200AX 3.3 Liter/rev 16,000 18,000 2140 3635 30 99 78 200AX W200R 3.3 Liter/rev 16,000 18,000 2030 3449 30 94 76 200R W245AX 4.0 Liter/rev 16,000 18,000 2518 4278 30 99 78 245AX W305AX 5.0 Liter/rev 18,000 20,000 3462 5882 30 98 77 305AX W305R 5.0 Liter/rev 18,000 20,000 3250 5522 30 93 75 305R W510AX 8.3 Liter/rev 11,000 12,000 3462 5882 30 98 77 510AX W

 

The previous post did not post in a format that is easy to read. Anyone know the model number of our SC? It seems they are very efficient and are capable of high rpm's depending on the model. It seems the smaller the SC displacement the higher it will rev. If someone can post it in a more legible format that would be nice. Also our SC part number would allow a search that would be more accurate to our unit and whether stacking pulleys is safe or not. Thanks, Mark

 

Hello Mark,

Our SRT6 superchargers are / were made by a Japanese company called IHI. They are model IHI S105.

Best regards,
Bob

 

Sorry updated from original post...

Deciphering the data....please list a link if you have one.

Our SC is supposedly an IHI unit.
Its guestimated to be a 1.4-1.6L/rev unit.

The Lysholm 1600 is often used it implies 1.6L/rev - but doesn't show revs on the vertical lines - they have to be deduced - eg: 16m3/min at 10,000rpm would be 1.6L/rev at a PR of 1.
The IHI implies 1.4L/rev = 14m3/min = 14,000L/min at 10,000rpm
I believe 1.4L to be closer to our case.
Note: this 10,000rpm is pulley speed.
One of the rotors (right hand side - sitting in the car) travels at 5/3rds this speed.


Model.........Displacement...Max....Max.Peak...Max ....Max....Max...Peak...Peak.........SC
...................Liter/rev.....RPM......RPM......CFM...M^3/HR..Psi...VolEff.Adiab.Eff..Blueprint.(PDF)
W100AX............1.6.......18,000....20,000...112 0....1902....30......99.....81
100AX.W140AX....2.3......18,000....18,000...1430.. ..2430....30......99.....80
140AX.W140R.....2.3......18,000....18,000....1389. ...2360....30......95.....77
140R.W175AX.....2.9......18,000....18,000....1720. ...2922....30......99.....78
175AX.W200AX....3.3......16,000....18,000....2140. ...3635...30.......99.....78
200AX.W200R.....3.3......16,000....18,000....2030. ...3449....30......94.....76
200R.W245AX.....4.0......16,000....18,000....2518. ...4278....30......99.....78
245AX.W305AX....5.0......18,000....20,000....3462. ...5882....30......98.....77
305AX.W305R.....5.0......18,000....20,000....3250. ...5522....30......93.....75
305R.W510AX.....8.3......11,000....12,000....3462. ...5882....30......98.....77
510AX.W

 

If you want to do some calcs....
try the following for stock condition...

max rpm redline..................6200rpm........A
Crank Pulley........................155mm..........B
SC Pulley.............................74mm..........C
Pulley Ratio.........................2.09..............D= B/C
SC Revs @ redline................12,986.........E=DxA
Supercharger L/rev..................1.4...........F
Supercharger m3/min................18.2........G=ExF
Engine Intake every 2 revs.........3.2L.........H
Engine Volumetric Eff..............92.2%........I
Intake per min.at VE=0.922....9.1m3/min...J=H*A/2/1000*I
Pressure Ratio........................1.99..........K=G/J
Corresponding psi..................14.5...........L=K*14.7-14.7

Plotted on the IHI chart...the SC is pretty much maxed out (at redline)...ie: if this is the correct chart.
I say this because people have shown it capable of 181/65 = >20psi - see other attach of alternate calc to above.

Note the vol. eff of the SC at 13,000rpm and the higher PR is >95% - hence the almost vertical line.

I state again - this SC speed is the 5 lobe pulley driven rotor.
The other rotor, the 3 lobe rotor is spun up via the front internal SC gear box to a ratio of 5/3
So 12,986 becomes 21,643rpm for the 3 lobe rotor
....and for the 181/65 case...17,265 becomes 28,774rpm for the 3 lobe rotor