if I change my cam in my 91x28 305tpi to this cam would I have to change the computer chip?

Basic Operating RPM Range:



1,000-5,000 RPM
Intake Duration at 050 inch Lift:202Exhaust Duration at 050 inch Lift:212Duration at 050 inch Lift:202 int./212 exh.Advertised Intake Duration:252Advertised Exhaust Duration:264Advertised Duration:252 int./264 exh.Intake Valve Lift with Factory Rocker Arm Ratio:0.550 in.Exhaust Valve Lift with Factory Rocker Arm Ratio:0.546 in.Valve Lift with Factory Rocker Arm Ratio:0.550 int./0.546 exh. liftLobe Separation (degrees):113Intake Valve Lash:0.000 in.Exhaust Valve Lash:0.000 in.Computer Controlled Compatible:YesGrind Number:252XFI HR13Quantity:Sold individually

 

The description answers your question: Computer Controlled Compatible:Yes


It's not a must, but it would be very beneficial to pick up a chip as well. You could see 20 extra horses, maybe more.