The new Picco P7R Evo is an amazing engine, loads of bottom end and awseome run times. I did find the bottom a little too strong sometimes and changed the throttle exponential to smooth it out. I found I was just feathering the throttle coming out of bends and running wide with the power.

I have my secret weapon sitting waiting to be run in for the Nats this year, a Siim PGR 21. Bascially one of the last engines that Siim made based on the Sirio Sti. Apparently it's a ballistic cruise missile. Can't wait to try it out, so beautifully made and finished.

Siim have now changed to Picco based engines, which is no bad thing either.

I have a V-spec which blew a rod on the 2 gallon mark, 3rd tank after putting in new bearings?????? Stonking engine though when it did run, but I wasn't so happy about it's fragility. This is one of those engines that you find amazing being as it's just a 3 porter, as it has power all through the curve and screams up top, and nice and smooth too. Depends who you talk to, some people love them, others just hate them. Hopefully with a new piston and liner and a new Speed rod in, it should be better when I eventually can be arsed to run it in and try it again.

My RB WS7 III on the other hand is also a stonking engine, but a lot weaker on bottom than the Picco I mentioned. When I geared it 13T CB and put on the JP-4, it really came alive. Also, easily 10 minute stops on this engine if you drive properly.

I also have a GRP 21 tuned. A great little engine too, very nice and smooth power band, with decent run times. Really screams up top, just like the WS7, but with more bottom and mid.

Another engine to add to the mix is the Nosram 21 RR, I have the previous version Evo in my Son's Hyper ST Pro and it's a great little engine too, outclassed by the ones mentioned above, but the RR is in a different league to that and really quick all round again.

Difficult choice choosing a new engine as almost everyone seems to make good ones nowadays. Get to your local track and see what the other guys are running and why?