I was thinking mebbe sometime I might get a Cougar, but I don't really want to spend much cash so I was wondering what spinningwazkit (engine) should I use that I already have.

I have 2 Irvines a .46 and a .53. I am guessing that they weigh the same as the .40 but obviously *****loads more power.

So would an Irvine .53 do the job?

'Cause I have heard that a lightweight engine would be better for the stupidly high 3:1 thrust-weight ratio.