I haven't measured the actual speed but when my sons fly my Ultrastick 1.20 lite with a Saito 1.80 and 16/8 APC prop and I fly the Tigershark around the pylons, they beat me hands down for speed (By close to a lap after 3 minutes and certainly a lot faster along the straights).
This is a real problem at the dinner table that night (Teenagers - what more can I say).
We don't actually compete in pylon races, we just do these things for fun. (I have a Viper 500 with the same motor and a tuned pipe for real fun).
The only way I can keep up with the Ultra Stick is to get airborne faster than them, Climb as high as I can then use a dive to build the airspeed and try to keep it there. This is fine provided they have a problem getting airborne (I would never dream of turning out their high speed needles by a turn when they're not looking

) but if we make it to the flight line at around the same time - the ground roll of the stick is much less than the Tigershark.
Even when we swap planes, The same result happens - I beat them by about the same amount with the Stick.
I know these models will go faster - I've seen it. I've fibreglassed the wing joint so it should be ok there.
Maybe I'll put my Jett 61 in it
I'm also thinking of buying an OS 55AX for it but am open to suggestions on that. Then again over here I can get the Magnum/ASP's at a very good price
I forgot to mention that the TT engine only has about a gallon through it. It's my first TT engine so I'm not too sure how long they take to run in. It also uses the stock exhaust at the moment.