im asking a question for my friend, he has a vc worked 5L v8, so heres the question: hi i have a vc commodore with a 5l fuel injected v8 conversion i changed the cam to a stage 2 cam and yella terra roller rockers will the engine run with the stock memcal computer chip or do if i need to keep the new tuned chip in the car atm my car is dinking 17.4 litres of fuel per hundred km and as u can imagine is costing me alot to run it although the *******s pretty *** quick

well obviously the car runs if your driving it around. But it'll be sooo out of tune. Hence the fuel usuage. You will always need a tune with any sort of cam change. Take it to chip torque, or someone similar and tell them your cam duration, lift etc, and they will make you up a new chip. Then you'll be going faster and using less fuel. Too easy.

im pretty sure you can use the original de4lco memcal and just get it reprogrammed but apparently you can only do this once so the reprogramme is how it will allways be, other than that usually when you buy a cam package for an injected 5litre it comes as a package including the chip so that would make me assume that you do need one