Quote:
Originally Posted by ICTsccaCamaro
In the Hellcat world (I've got a TRX) we have a lower crank pulley sleeve that bolts over the factory crank pulley, you add the new length belts and it adds about 1.5psi of boost good for about 50-60hp. The factory tune has just enough fuel it can add to compensate for the slight boost increase and keep AFR's happy. Does the factory ZL1 tune have any room to compensate for a slight boost increase?
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You really need to get the crank pinned and use a proper aftermarket pulley. The stock damper and pulley has been known to spin on the Hellcat engine, even stock, but when you start adding more power, the chance increases. Pinning the crank really is a must if you do any mods to those engines.