Sorry gents this is an old topic but could not get search to dig up the old thread for me but I need an assist from the forum. I am building a street car and wanting to have typical city street driving comfort from this engine like any stock manual car. I have read numerous times that the 480 is hard to tune but tunable (need to define that I guess). Well, not being a “camologist”, and fully grasping the impact of all the cam specs, engine selection was a calculated risk, and I’m beginning to realize not a good one so far.
After hours with two independent tuners (both with solid reputations, not the shade tree guy, hence lots of money), I have a car that fails to meet my standard for drivability. I did like many and added the Dakota Digital to supply speed reference to the ECU (0 speed on dyno obviously). In trying to hold say 30 or 35 MPH on dyno with steady state throttle, the cam surge begins to kick in and the car bucks very uncomfortably.
So, if anyone knows what technique your tuner used and can share, I’m looking for an out before I go last resort and pull the 480 cam out and install the stock 430 HP GM cam.
Any advice or recommendations is greatly appreciated.
After hours with two independent tuners (both with solid reputations, not the shade tree guy, hence lots of money), I have a car that fails to meet my standard for drivability. I did like many and added the Dakota Digital to supply speed reference to the ECU (0 speed on dyno obviously). In trying to hold say 30 or 35 MPH on dyno with steady state throttle, the cam surge begins to kick in and the car bucks very uncomfortably.
So, if anyone knows what technique your tuner used and can share, I’m looking for an out before I go last resort and pull the 480 cam out and install the stock 430 HP GM cam.
Any advice or recommendations is greatly appreciated.