This is the third comparison pair, now in 0,91 cubic inch class.
Both engines were new, from the box, so there was no any signs of fuel, residue or else imperfections.
There was very interesting to collect a lot of impressions about engines design, constructional details and build quality, comparing consequentially three pairs of O.S. FS engines and Thunder Tiger F engines in the same size and class.
Of course, there are still their launches ahead and their comparisons already in the real world, with real loads.
In the meantime look, do not be served, and criticize if you do not like something.
And well, if you like it don't be shy, put likes and subscribe to CrazyEngines!
Thanks and have a nice day !