Re: Of Long Posts and Superchargers...
Nice write up with some great information. Always feel free to use anything I’ve posted on forum – it’s there to share.
Regarding the Supercharger RPM – the max RPM the SC will see with the 185mm @ 6150 RPM is still under maximum limit that is determined by the SC bearings . I hit maximum engine RPM (6150) in first, second, third gear (and only for a moment between shifts).
I’ve never gone fast enough to hit redline RPM beyond that (other then on a Dyno) – and I’ve had my SRT6 up to 170MPH – So if you still have the factory speed limiter set on your ecu….. But I have been “road course” driving and kept the RPM’s revved up in both second and third gear (around 5,500 RPM) with no issues.
Regarding Heat – One of the first mods I installed after the 185mm pulley was an IAT gauge – for just this reason. I mounted the sensor near the factory sensor (to see what the ECU sees) – and never had an issue. Keep in mind that my IAT sensor is copper clad and will read a little higher than the tip due to the air distributer is mounted on. But even so - - IAT’s are not an issue for me. I’ve never even heard of anyone having this issue with any size crank pulley. Spray water/meth if you want – but I don’t need it.
The 100*C (230*F) IAT you mention is well over the SC cut-off temp set by the ECU. The max IAT I see with the larger HE and split reservoirs is around 145*F on a hot summer day - boosting hard – on cooler days I see around 95-110*F when boosting.
When I go back and look at the first map you posed and keep my eye around the 70*C line I like what I see. It tells me I’m staying right in the “Sweet Spot”.
Last edited by BrianBrave; Jan 20, 2009 at 12:40 PM.