I know in the past there has been ALOT of confusion on how much HP the GM supercharger kit can make... a lot of people (myself included) lost hope when we where told that the GM kit can not make over 220 HP.
I won’t say what the max of this kit is, because no one has ever gone all out with it, but here are some numbers to play with.
Eaton MP-45 INFO
150 CFM to make 100 HP
And some math so you can find how fast YOUR supercharger is spining. Stock crank pulley is 6" tall.
Click ME
now, find out what CFM YOUR set up is doing.
With ANY Eaton supercharger, Water Meth injection is pivotal. it now only helps with cooling the intake air temps, it helps keep detonation at bay, allowing for more aggressive timing advanced tables to be ran, Helping to make more HP
Have fun!
Chris
Edited 1 time(s). Last edited Tuesday, August 14, 2007 6:32 PM
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
Know***********
really have to go prem..
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
i was at work... Karo can atest for me, i get alittle.... flustered. sorry.
Ron, can you fix it for me PLEASE?
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
I owe ya one Ron, But i have a feeling i can find some way to get ya back...
Thanks,
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
Stock crank pulley is approx. 6.425dia.
I've posted the formula many times. Crank pulley divided by s/c pulley X engine RPM = S/C rotor RPM. (6.425/2.6X6200=15321s/cRPM)
Where did the pull the 150cfm to make 100hp from???
"The FACTS are always subject to CHANGE once the TRUTH is applied"
"In the entire history of man the only stupid questions are the ones that don't get asked"
so whats the final number that it supports, some of us dont like doing math
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
I have always thought it was good for more than 220 hp. I was at 214 with the stock pulley. I can't wait to get my built engine put back in and get some new dyno #s. BTW How come you have not dynoed your car Chris?
FORGET GIRLS GONE WILD WE HAVE GOVERNMENT SPENDING GONE WILD!
my crank puley is 7", stock charger puley. at 6800 its spining 17,000 RPM.
so its just over 405 CFM. or 270 or so HP.
go to that link, thay have the MP-62 listed to.
i havent dynoed for 3 years, i have alot going on, one of them is trying to get my 130 K stock 2.4 built.
for my math i used 1.5 CFM per horsepower.
bu i have found this, and with this math, at 400 CFM i should only be making 180 HO
"We use the rule of thumb of 2.2 cfm per horsepower"
also found this
"1 TO 2 CFM PER HORSEPOWER "
so i will stick with 1.5 CFM per HP.
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
my crank puley is 7", stock charger puley. at 6800 its spining 17,000 RPM.
so its just over 405 CFM. or 270 or so HP.
go to that link, thay have the MP-62 listed to.
i havent dynoed for 3 years, i have alot going on, one of them is trying to get my 130 K stock 2.4 built.
for my math i used 1.5 CFM per horsepower.
bu i have found this, and with this math, at 400 CFM i should only be making 180 HO
"We use the rule of thumb of 2.2 cfm per horsepower"
also found this
"1 TO 2 CFM PER HORSEPOWER "
so i will stick with 1.5 CFM per HP.
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
Taetsch Z-24 wrote:my crank puley is 7", stock charger puley. at 6800 its spining 17,000 RPM.
so its just over 405 CFM. or 270 or so HP.
go to that link, thay have the MP-62 listed to.
i havent dynoed for 3 years, i have alot going on, one of them is trying to get my 130 K stock 2.4 built.
for my math i used 1.5 CFM per horsepower.
bu i have found this, and with this math, at 400 CFM i should only be making 180 HO
"We use the rule of thumb of 2.2 cfm per horsepower"
also found this
"1 TO 2 CFM PER HORSEPOWER "
so i will stick with 1.5 CFM per HP.
Chris
so a 7in crank pully and the pulleyboys 2.5 s/c pulley @6800 makes over 19000 s/c rpm's whats that equal?
THERE CAN BE ONLY ONE, i have already died once and im still here so lets just leave it on the track
But are you spinning the Sc to fast to be efficent.. with the 2.5 pully you need the blower to ported/polished to make a diffrence. with a 2.6inch pully your pushing it. all you are doing is pushing hot air into the motor.
The blower is for some one who wants a little more power with out the difficulties of a turbo kit. If you want decent numbers with the blower put the stock pully back on and raise the comp to 10.5-1 port/polish the charger and port/polish the head. use a meth kit plus a nice sized exhaust should make one decent supercharged z. probably in the 275 mark. The gm tune plus hptuners should equal out pretty nicely.
But this is just speculation.
Quote:
so its just over 405 CFM. or 270 or so HP.
270hp - 15% for drive train loss = 229.5 fwhp (approx).
"The FACTS are always subject to CHANGE once the TRUTH is applied"
"In the entire history of man the only stupid questions are the ones that don't get asked"
.... SO how are people with stock pulleys making around 205-215?
my avd 1-4 times are 13.9 @ 103. i know HP calc's are not good, but my time says 225-235 WHP, and my trap speed says 260 WHP.
when people say its making more heat than power it can make, IE less efficient, WATER INJECTION.
the ONLY thing I’m worried about is the MAX rpm of the rotors.
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
Quote:
Stock crank pulley is approx. 6.425dia.
Gary,
Where is that measured from??? I measured the stock pulley and the OD is around 6.75"?? I will remeasure my stock pulley tonight
Jason
99 Z24 Supercharged
157hp/171tq - NA
McFly wrote:Quote:
Stock crank pulley is approx. 6.425dia.
Gary,
Where is that measured from??? I measured the stock pulley and the OD is around 6.75"?? I will remeasure my stock pulley tonight
measure it from where the belt actually sits not the most outer edge
THERE CAN BE ONLY ONE, i have already died once and im still here so lets just leave it on the track
^ What he said^
If you measure the outside (front) lip. It checks approx. 6.71. If you check the top of the ribs , 6.425.
Max rotor speed for the 4th gen S/C is 16000rpm. The 3rd gen is 14000rpm. Anything above 12000 is pushing outside the heat range and limiting any power gained.
There's just no way around it. An MP45 (4th gen) is not going to push over 230 at the wheels on a 2.4 liter motor.
"The FACTS are always subject to CHANGE once the TRUTH is applied"
"In the entire history of man the only stupid questions are the ones that don't get asked"
listening...
2010 Subaru Impreza WRX Limited
1999 Cavalier Z24 Supercharged
1999 Grand AM SE (Beater Car)
1997 GMC Sierra
2007 Honda CBR 600RR
2005 Honda TRX450R
john317(AKA Gary the Old guy) wrote:Max rotor speed for the 4th gen S/C is 16,000rpm. The 3rd gen is 14,000rpm. Anything above 12,000 is pushing outside the heat range and limiting any power gained.
Well the center line of the belt for a LD9 crank pulley is 6.284"
Also to the top of the ribs is 6.406" or REALLY close on all the stock crank pulleys I measured. Old man rivers.....6.425" is within range.
Really anything smaller that 2.6" is really close pushing the 4th gen beyond its limits. At least RPM wise... About 15,710 RPM
Hell even stock at 2.8" is spinning pretty damn fast.
Engine spinning @ 6500 RPM, charger pulley spinning @ 14,588 RPMs.
12,000 is a little to conservative. I wouldn't go any smaller than the 2.6" pulley. Hell, your already about 50 degrees F hotter with the 2.6" pulley than the 2.8" pulley.
Also the M45 really isn't making any boost until you about 1500 RPM....according to the graphs.
Edited 2 time(s). Last edited Wednesday, August 15, 2007 12:21 PM
PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
DID someone say custom intercooler lol
THERE CAN BE ONLY ONE, i have already died once and im still here so lets just leave it on the track
john317(AKA Gary the Old guy) wrote:Quote:
so its just over 405 CFM. or 270 or so HP.
270hp - 15% for drive train loss = 229.5 fwhp (approx).
Minus the 30hp needed so spin the supercharger to 17,000rpm.
In the past I have spent hours searching the net looking for anyone, any motor, any car with a M45 that has dynoed over 230whp and i have not found one.
- 93 mph in the 1/8 mile
Member of J-Body Of Michigan.
Correct.
BUT I would like YOU " SKILZ" to riddle me how i was doing 13.9 103MPH with my 130K Z24?
just because you knew of ONE person that built his car and didn’t do well doesn’t mean every car is like that, also..... How much tuning did he have done?
"Max rotor speed for the 4th gen S/C is 16000rpm. The 3rd gen is 14000rpm. Anything above 12000 is pushing outside the heat range and limiting any power gained.
There's just no way around it. An MP45 (4th gen) is not going to push over 230 at the wheels on a 2.4 liter motor".
That graph is the MAX of its efficiently range, NOT its max RPM after that it becomes inefficient, taking more HP to spin and making more heat. BUT once more...
WATER INJECTION!
The two biggest anti GMSC people here seem to be running crappy times\ no times.... did you race your car "SKILZ"? or what was the reason?
Moving on, I posted this info so people can try to push the MP-45 not to start another "the GMSC sucks and a well built NA Quad-4 is better thread"
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
Taetsch Z-24 wrote:Correct.
BUT I would like YOU " SKILZ" to riddle me how i was doing 13.9 103MPH with my 130K Z24?
Seems pretty normal to me, with a good driver. There are 3 or 4 guys in J-BOM in the 220-230whp range that all have ran 13.9 @100+mph.
Taetsch Z-24 wrote:just because you knew of ONE person that built his car and didn’t do well doesn’t mean every car is like that, also..... How much tuning did he have done?
The ONE person i know happens to be the highest WHP achieved from a M45 that i have ever seen. I would hardly consider that to be not doing well....
Taetsch Z-24 wrote:"Max rotor speed for the 4th gen S/C is 16000rpm. The 3rd gen is 14000rpm. Anything above 12000 is pushing outside the heat range and limiting any power gained.
There's just no way around it. An MP45 (4th gen) is not going to push over 230 at the wheels on a 2.4 liter motor".
I'm not sure why you are all of a sudden trying to contradict yourself, but okay.
Taetsch Z-24 wrote:That graph is the MAX of its efficiently range, NOT its max RPM after that it becomes inefficient, taking more HP to spin and making more heat. BUT once more...
WATER INJECTION!
The two biggest anti GMSC people here seem to be running crappy times no times.... did you race your car "SKILZ"? or what was the reason?
Water injection will surely cool the air temps, no one here argues that.
Did i race my car? where/when?
Taetsch Z-24 wrote:Moving on, I posted this info so people can try to push the MP-45 not to start another "the GMSC sucks and a well built NA Quad-4 is better thread"
Who says the M45 sucks? If you're so sure you're putting down 250+whp prove it.
Edited 2 time(s). Last edited Wednesday, August 15, 2007 4:12 PM
- 93 mph in the 1/8 mile
Member of J-Body Of Michigan.
Chris,
I will have to remeasure the RaceTech pulley. The 7" is outside diameter, so the actual diameter maybe around 6.75" max
Jason
99 Z24 Supercharged
157hp/171tq - NA
