engine trouble

[welshwizard]

please please help
i have got 2 nitro cars 1 is a hpi super nitro rs4 with a nitro star 15fe engine & the other is a tamiya tgs chassis with a os fs12 engine, i want to make these babies as fast as possible & I'm sorry to cheap as posssible 2, any suggestions on engine upgrades & just any thing 2 make these thing af fast as f*~k!!

 

[greatmodels]

put a .21 in the super

 

[sikz3]

One word: Novarossi

 

[taylor200000]

in the tgs put this .15 in it. it flys along with it http://www.osengines.com/engines/osmg2010.html:doh:

 

[spanko123]

if you want to be cheap, not sure about teeth for those cars, but get about the lowest amount of teeth for a spur gear you could find, then if you want a bigger pinion. and also lean the poop out em and thats about as fast as you could get em for a bout $4 on each car :hbd: