Big bore engine kits

[Kaz the Minotaur]

Hello I am looking at these 2 engine kits:


http://www.davesmotors.com/store/product340.html and http://www.davesmotors.com/store/product616.html


One the second one what is the difference between the 2mm crank and the 2mm stuffed crank? Seems like the second one is the better value for only $12 more?


Do these kits make low and or top end power?

 

[magnum57]

Stuffed crankshaft reduces crankcase volume, resulting in improved throttle response and engine power.


The built in Stuffed 2mm stroker crank alone will add 15% more power to you motor.This stroker will mostly add bottom end. Big difference for $12.00.

 

[Kaz the Minotaur]

Thats what I was thinking.


How complicated is this to put in? Do you need anything other than basic hand tools?

 

[RampageHopUps]

Here is a good pciture tutorial for the head kits.


http://www.hpibajaforum.com/forum/showthread.php?t=6928


The 28.5 is the easiest, since you don't have to split the case. But the 30.5 will give you more torque for more labor needed.

 

[Kaz the Minotaur]

That doesn't look too bad. What he installed that tutorial appears the same amount of parts as is in that kit I was looking at with the stuffed crank.


How do you pull the flywheel and stop the piston with out those specific tools?

 

[fourwheeler]

A piece of rope in the spark plug hole will stop the motor from turning.