This thread delivers, full race balance style.
As someone who's had RS's on an 87mm 3L they STILL sucked compared to 5's.
They weren't as bad on a 3L as everyone makes out they were but it's not even fair once the 5's are fitted to the same engine.
The graph for this will look like a cliff, nothing nothing nothing nothing then a sharp rise on the right hand side.
It will be great if you can always keep the rpm up, but for example if you're in 3rd at say 60kmh and go full throttle it's going to be painfully slow to get any meaningful power out of it and if it's a street car you may think that's super quick but relatively speaking compared to others it will get left for dead.
Good luck with it however it ends up