Originally Posted by
tabetha
Don't waste your money on closed loop, I have this facility on my ecu, but don't use it, if it is mapped correctly then the gain will be zero, if you were running a cat then that is a different matter.
I was getting 40+ mpg on a run as I call it, but that wasn't motorway or anything involved going through the centre of a major city and only about 10 miles of motorway at a steady speed.
CL is way over hyped imo, it's a simple flick of a switch to use mine, I never bother, bit like the massively over hyped coilpack, if there are no issues with misfires under boost etc caused by the old fashioned ignition then there is no "gain" to be had.
Beware of greens they can vary a lot, my last set of dark greens 0 280 150 803's were at 80% duty at around 300 bhp, on the std rail pressure 3.5 bar, these had just been cleaned so were the lowest cc/min you should get, used ones are a bit higher.
A live map IF done on the rollers would get the best, as this way any combo of speed/load can be held, unlike road mapping, I would not bother with road mapping personally.
Just my opinions.
tabetha
so correct me if I'm wrong Tab, I seem to be reading that there is no advantage going into grays plus chip unless you start changing the Turbo output. Fitting of the grays would seem that they are more capable of delivering more fuel if you change the chip and have reached maximum duty cycle on the greens by way of increasing boost.
I bought the chip, greens etc. from NMS and have been very pleased with it except I have always thought the engine was a little retarded before it went into boost i.e. lower revs and my fuel consumption is not great so I have never had the vehicle life mapped mainly because the nearest four-wheel-drive dyno is 300 clicks away from me and 1300 clicks the other direction. Costs also being a factor as the one guy wanted $2500 to live map it and then the worry is that "do they know what they're doing on a car they've never worked on" there are only a handful of Cosworth's in Western Canada. Does I live map really make that big difference to the performance and miles per gallon? I'm guessing that when Carl wrote the chip he was probably a little conservative on the amount timing advance he put in as he was dealing with the gasoline rating that he was not familiar with being the other side of the world.