<< Just to add, my Gems was on a classic (my98) so i cant comment on running on a newage, as the newer ecu has more functions than the one i had.
But even then,
Cold start was a nightmare, hot start was a nightmare. Idle would vary, boost would sometimes not hit target, and then othertimes go way over target...
Yes, you get lots of pops/bangs/flames...But not worth paying the extra money, and having the extra hassle just for that.
Although, mine was only ever mapped by one mapper.
As you said m8 you can was only mapped by one mapper.
What if your car was mapped perfectly...would you be happy with it then?
With no hot or cold start issues..would you be happier still?
So give the GEMS ECU a chance and it can perform.
As for Anti-lag, it worked extremely well on my car, never once had an issue when braking. >>
I recon the mapper done it different on some cars.
Just ask Squirrell about ANTILAG things