stewart_mcg

Hi all,

I have been reading some very interesting threads of the last few weeks as to what can be achieved by having the engine fuelling/timing etc remapped. I was wondering if someone had ever tried to remap the engine so as to produce as high a fuel economy as possible? (turn down the boost - what will they think of next)

I am thinking about getting my engine "done" at some point and I have read that there is a chip out there (unichip i fink) that allows you two have two custom maps available at the touch of a button - one for max economy (for those 500mile motorway runs) and one for some fast road work.

Has anyone ever attempted this?

Cheers

Stewart

nom

I'll think you'll find that as a motorway speed (rpm/load) is known, this particular point will be mapped for economy anyway. If you floor it, the load moves out of that area & you have power. Don't floor it & it stays economical

stewart_mcg

OK - that's the steady state condition but what about getting up to speed?

nom

Don't use your foot as much!

If mapped properly, the fueling should be lean at cruise, but then basically the higher the load & rpm, the more fuel goes in. So, if you accelerate slowly, the mixture will only increase in fuel a little, so stay economical (that's a joke ) - as economical as possible. It's not possible to simply 'use less fuel'.
The technique, if you have a badly restrained heavy foot, maybe to simply disconnect the boost solenoid controller, thereby simply denying the use of the higher end of the map (boost won't be able to go over half a bar/7psi if you have a 'normal' set up, so load must stay low).
A mapping genius may be back to say I'm wrong, but this is the general gist

ChristianR

iTrader: (1)

if you are looking to get a remap done, I can highly recommend (and no doubt a lot of other people as well) br developments (www.brdevelopments.com)

GavinP

I have a BRD Link and the car was more economical than the standard JECS - off boost.

I would suspect it would be easier to go for the Link and speak to Bob about fitting a boost controller with 2 settings.

Thanks

Gavin