how to get more power out of a stillen supercharger kit?

RCZ

Ummm I'm making 455whp at 9psi with a custom tune. Otherwise its an out of the box Stillen supercharger kit. If anyone has any doubts, my car trapped 121MPH last night at the track. For comparison, the 2012 GT-R does a quarter mile run in 11.0@122mph.

OP, don't listen to all the people in here talking trash to sell GTM products. Notice how they have no real suggestions to help you, they just want to criticize the stillen kit and bring you down.

I am planning on getting the 928 Motorsports impeller soon. I think it will add a lot of midrange torque and some high end power with the increased volume. I wouldn't be surprised if PSI went up due to the flow. Probably bump me up to 470whp.

Nixlimited

That's a great trap speed. What was your actual time?

esfourteen

jnaut was driving and his best time was a 12.2 with a 2.0 60' from what I heard, the car just isn't setup for 1/4 mile and he couldn't put the power down.

__________________
Build Thread | GTM TT Install Thread | Engine Build Thread

Nixlimited

Drag slicks? I imagine those would help cut that 60' time down to 1.6 or so, which would help the overall E/T. Making that power the car should be in 11's for sure.

Mr.Squeeze

With your mods adding the 928 Motorsports impeller should get you 470whp without a problem. It is designed to increase boost I think your psi will go up the 9 pulley from Stillen is small. I have to measure it the pulley is smaller than 2.87 inch Vortech pulley. If I had to take a guess I would say its 2.75 in size.

I am curious to see the graph of your car with the impeller.Because the pulleys that are on the back of the bracket and supercharger slow it down because there so big.

__________________
Driven Motorsports Single Turbo 7675 T4 1.32 A/R 995WHP 780TQ

dal1307

RCZ is right. I have no complaints from my kit and my review speaks for itself. I just wish I lived closer to sea level! I am hoping to be able to replace my 9PSI pulley and get up to 8 PSI of boost at altitude. I am currently trying to determine what RPM the blower is turning with the 9PSI pulley to see how close I am to the 52K upper limit. That 928 motorsports impeller also looks promising but would cost a bit more than a pulley swap.

__________________
2008 G37s 5AT, Stillen SC, Stillen CBE, Stillen tranny cooler, DBA 5000 front/4000 rear, Stillen sways, Tein SS-P coilovers, SPC front & rear control arms, Goodridge lines

Mr.Squeeze

There is no way for you to know how close your are to the limit of the unit without having cog pulleys.In order to find out how fast you are spinning the blower you have to put in the crank pulley size plus the supercharger cog pulley and jack shaft cog pulley ,and use the impeller speed calculator on Vortech web site..This is the one of the reason's I made the switch to a cog set up.With the 928 motorsports impeller you can spin to 60k up from 53k.

Even with doing all of that there is still some belt slippage that you can not account for from the serpentine belt on the front.

__________________
Driven Motorsports Single Turbo 7675 T4 1.32 A/R 995WHP 780TQ