new conversion need some help

[mbx1275]

hey guys i have converted a ofna mbx with rc monster motor plate
im using
zippy 4cell 5000mah lipo
losi xcelorin 2100kv
losi esc
im running 15t pinion and 51 spur
just wondering if this is a suitable ratio stock gas setup is 14t/51t

ill post some picture when i get a chance
cooked my old 80a hobbywing esc when the spur came loose causing heavy mesh