Supercharger and tuning?

[sixthandredline]

Lets say I want to supercharge my car, but use the base tune that it comes with( I'm considering science of speed) I understand that the out of box tune is usually a bit conservative and is probley the safer tune to use so long as I get a wide band and monitor it, but since I already have mild aftermarket like intake and exhaust and throttle body will it affect it enough to where I need to get ems or kpro and take it to the dyno before its safe to use?

[sixthandredline]

oh yea, Just for the record I know the intake will go away.......didnt mean to put that in there

[repiv]

No experience with the SOS kit. It's still pretty new. It also depends on if you've got AP1 or AP2. Does SOS have a kit for both? The exhaust shouldn't affect the "tune" of a supercharger much except to help it exhale better. The throttle body, on the other hand, is hard to say. It kinda depends on just how rich the SOS is out of the box. Only by logging the a/f can you know for sure if any other engine intervention will be needed.

[sixthandredline]

They do make a kit for the ap2(everything short of the 09) but I have an ap1. I guess it would be a smart idea if im going to spend all that money to just schedual a dyno run.

[meat]

If you are spending thousands on the car - tune it correctly.

[kevos2k]

kpro ftw

[Jerome]

sixhandredline, For sure have your AP1 dyno tested and tuned after supercharging! My AP1 was running too lean after installing Comptech supercharger and aftercooler on the completely stock car. My tuner was able to richen up the a/f mixture by adjusting the (kit) fuel regulator.
NOTE: If you are running a completely stock exhaust system (as I am), the dyno's test unit may read a/f mixture as 0.5 higher (leaner) than the car is really running. This is because my tuner was testing the a/f mixture just a few inches inside the one of the exhaust tips (downstream from the cat. and muffler).
To insure that I was getting an a/f reading the same as the OEM engine management system was reading, I installed a wideband Oxygen Sensor just opposite of the stock oxygen sensor in the headpipe (upstream of the cat.). The three extra gauges I had installed to monitor supercharger kit parameters are: air/fuel mixture, fuel pressure, and boost/vacuum. The air/fuel mix and fuel pressure readings are important for your tuner to setup the system correctly. Boost guage is helpful in telling if your supercharger belt is slipping and needs to be tightened. With a correctly setup supercharger system, one can safely run up to 7 lbs psi boost using a (Comptech) voltage supressor module connected to the stock engine management system. This assums using one heat range colder plugs (gapped at 0.034") and a higher volume fuel pump. Under normal driving, you can expect one to two miles less gas mileage due to the extra hp needed to turn the supercharger and the slightly richer a/f mixture: a small price for the extra 100 hp on demand.

Jerome
NW Arkansas
Black Stealth S2000