Originally posted by snemi00
The Mugen X12 is not based on the RRL Novarossi engines. It is an NS12 based engine.
Thanks for the confirmation.
Originally posted by snemi00
It is referred to as a long stroke engine because the bore (piston/sleeve diameter) is less than the stroke, in this case 13.80 mm x 14.04 mm
The RR12L engines have a 13.70 mm bore x 14.25 mm stroke, which makes this engine a longer stroke engine.
I guess we should use
relative terminology here to differentiate them both... For me, "short" stroke always referred to the NS/NSR and the "long" stroke was always the MT12 and RRL12 engines.
Originally posted by snemi00
These RR12L3 or RR12L5 engines are awesome on a short track and have loads of low end torque and have been extremely reliable for me.
Yes, I find them really reliable too. You can actually make them scream at the top too if you smoothen and alter the crankshaft window timings.
Originally posted by snemi00
Another awesome engine to give consideration to is the Collari LC12 by Werks racing. This thing winds and pulls like nothing else I've tried and uses AAC construction to boot.
How long have you used them? Do they last?