Cheers, I was just using the Aqua for Daily A. I just did the Super_GT thing of putting all the "Racing" category parts on it and then used the power restrictor to knock it down to 147. That took me to a 1:37 and I know if I hooked a lap up a bit tidier I have a least a low 1:36 in it but not sure if at this point if there is anything specific I'm meant to be tweaking.
I think that was my start car, I'm just about to pop on, so i'll see what pp its got to be at, but sounds like you have it there now anyhow