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Hi Paul

I used to run bluefin stage1 on my old RS and it does make the car come alive like it should of been when left factory and you can put it back to standard map and remove map to immobilise the car with the bluefin and stage 2 map is free, think Collins do the same kind thing but not sure though and Revo seems to be a popular choice, I think any stage 1 map is an improvement over standard map.
 

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I have run the jamsport stage 1 map for two years, I personally don't like the map, runs poor from cold and has boost spike issues. When at motorway speeds it's either on or off boost making difficult to get good mpg
 

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I went back, nothing wrong with the car, it's just not a nice map, I won't be using them for anything again. My personal experience with them was not good on more than one occasion, even when they rebuilt my escort turbo engine they left bits lose.
 

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I have run the jamsport stage 1 map for two years, I personally don't like the map, runs poor from cold and has boost spike issues. When at motorway speeds it's either on or off boost making difficult to get good mpg
My car had the JS stage 1 an I didn't like the map at all, was exactly how you said hard to keep a steady speed with it keep boosting up an down.
The Colin's CP340 was much better very smooth powerful map an much cheaper than revo....
 
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