okay i have a zin zih power zone zxi powered pile of crap- forgot it wants dampers rear, modified steering links as hopeless. So I may fix it out of spares as I have found along crank, clutch and flywheel for it.
I've also got a set of chrome wheels I found in the junk collection I have and fitted to the thunder tiger 4x4 rc race car-complete less engine.
My experience is cheap nitro rc cars are just junk, bought a few nice rc cars and repaired and resold them.
The thunder tiger race car should be very very quick even without tuned pipe from prior experience, the zin zih monster truck I think I'll strip diff to make sure it isn't made of **** like the rest of it and go from there.
my main monster truck has a force 15 and that needed to be broken in and is still tight as I have only put maybe 3rd of a gallon through it and run as per manual to break it in, hopefully some more runs and it will be upto full performance.
The two engines I bought it appears the complaints are due to customers not following running in proceedures- so I will pay special attention to them.