Ive have 2 AUM Golf GTIs at the moment. One has a Remap Science remap the other a Revo, and I cant tell much difference between them.
I didn't use Rtech because they only have 1 map and that is for super unleaded.
As I am not chasing BHP at a cost of travelling miles to find a 98 ron fuel supplier, I opted for these 2.
Remap Science is a custom map, and the Revo map can be tweeked slightly once installed on the car.
Ive used Revo on 2 Golf Mk4 AUMs, and think they are great.
It took Remap Science 2 attempts to get the map right, as it was loosing boost over 3000 revs. All sorted now though.
Rtech would map it fine.... You just see better results with super due to less knock allowing more timing advance to make power
Well when I asked Rtech I was told there remap is for super unleaded only, and then said I shouldn't map it for 95ron because it would damage my engine... which is rubbish.
What they meant was they cant map my car for 95 ron because they have 1 map, and its for 98 ron. Simples 
i think r -tech know a bit more about these engines and mapping them than yourself 
You may joke, but I asked a serious question in an email. "Can you map a Golf GTI AUM, but for 95 Ron fuel?" The answer that it will damage the engine is rubbish. Its actually already mapped to run on 90 ron if you read the fuel specification for this model. So whoever answered that email clearly didn't know more than me, and was trying to sell me a 98 romn map, as that's all they do. It would of been ok, as the car will compensate I just wont make the stated max figures, but I don't like being treated like a fool, so went elsewhere. Don't believe the hype 
R-tech don't have 1 individual map they create complete custom maps and that's why with some "creative set ups they hae the car for a week to ensure they can tweek it too perfection
The reason they say they don't map with 95 Ron is because they would rather not as it isn't as safe.
Anyone can map 95 Ron but it just means there is more chance if knock occuring and possibly bending a rod and then they would get the blame saying it was mapped crap.
They are more bothered about making the best and safest maps and customer satosfaction the. Making a quick quid like the big companies such as revo.
The same as when they get a car in that as a bodge everywhere you look. They refuse to map it, not because they can't but because they don't want to as its bound to go wrong and try will be blamed!
Whereas you take the same car to revo and they will map it without even lifting the bonnet and make some £££'s
Have whatever opinion you like....but I'm just saying...... It's wrong haha
