Hi Turbotoaster
we have had lots to do with R5 GTTover the years with good results.
i do lots of tuning work on the rolling road,setiing up 5s for a tuning company that only dose 5s and it was only just today that we where looking at fitting gotech on this actual car because it was on its limit @245bhp.
we are going to fit a 5th injector and also a tps so that we can map the fuel and ignition which has not ever been possible on 5s befor with a carb.
with doing this it will get rid of the over fueling at low reves and the under fueling at higher reves which is allways tippical on high power 5s.
this will in turn give you more peek power and more importantley lots more lower down torque as it is the power under the cuve that will make a fast car.
gotech will still give you the option at a later date to go full efi if you wish this.