XRAY - Model racing cars

Looking for something that can hit over 100. Any motor suggestions? What is the biggest motor that can fit? If I was to put a modified .28 LRP in there, what kind of speed would i be looking at.

thanks.

A .28 is a monstertruck or a buggy engine.
What you need is a .21 engine, my opinion a Novarossi PTS are very fast engine but very expensive for a cheaper engine and also in my opinion a Picco Torque Edo modified.
I run my RX8 with a Novarossi 35 plus 21 tuned and the car with good a setting en the right pinion and spur gear is very fast.

Hi i mounted a Mamba from castle creation 1/8 2200 Kv on my old motonica and it fit perfectly,
with right batteries 2x 3S 60 cells 22,2 V it can push your car over 100 with typically pull 4,000-5,000 watts (5 to 6 horsepower !!!)
here the link http://www.castlecreations.com/products/mamba_monster.html
good luck