Originally Posted by No1Piranha
What have the experiences been on lag with those that have swapped out their pulleys to overdrive the S/C? In theory, when the S/C clutch engages the larger pulley would put more initial load on the engine to get the S/C spinning up to speed, like starting out in a higher gear on a stick. I'm more familiar with Turbos -- have seen a number of large turbo swaps that added big hp numbers on the top end on the track of strip but have sacrificed quite of bit of throttle response on the street. Also, has anyone experienced any electronic gremlins or S/C durability issues from overdriving it? Do they run stock belts?
I just installed an ASP pulley on a co-workers SRT this weekend...and it definitely didn't seem to add any lag. If anything, it remedied some of the original lag.
I think your theory is a little off too - with that bigger pulley, at idle the supercharger will be spinning faster - and therefore when the supercharger finally engages, it will already be spinning faster than with the original pulley - hence less lag if anything.
The belt with the ASP pulley is stock because it also includes two smaller pulleys to offset the oversized crank pulley.
The only issues I have seen have been the IAT sensor and Intercooler pump failures. These are common without the pulley, so they should be magnified with it. They are easy fixes though. Upgrading the heat exchanger and intake air cooling system would be a good idea regardless of whether you stay stock or if you overdrive the S/C.
I too am used to large single turbo setups creating some lag - this is not the case with the SRT6.
SQ