AO Platinum Member
Join Date: Feb 2002
Location: The land that Time forgot
Re: Re-Map or Chip????
Remapping a turbo (either via the chip or mapping the ECU directly) gives better results than atmo' engines, because the boost pressure can be increased slightly as well as the other optimisation that they do. That's why the "diesel" remaps give better gains - they're mostly turbo'd while the Alfa petrol engines are not.
As has been said, these tweaks work by pushing the ignition timing and injection parameters closer to the limits. I'd say one that allows you to continue to use 95 RON petrol must be the better choice, purely because being obliged to use 98 RON is dearer and can you be sure you will always find a pump?
A re-map shouldn't affect your engine life unless it isn't done properly and you end up running a system that has gone beyond the ability of the fuel to support it (you've taken out the manufacturer's carefully calculated "slack" after all).
Earlier chip systems were notorius for pushing the ignition too far (over advanced) which melted the pistons. There is also the possibility that you will rev the nuts off your engine more as a result of the extra poke but you'd know you were abusing the beast so that must affect engine life, but no more than a similarly abused "unmapped" engine.
On the whole, it sounds like a good deal though... it may even be possible to get the cost back from the extra mpg if you're keeping the car long enough (obviously not applicable if you have to give it 98RON).
No bullets for Chaingun..