Thanks for the resurrection of the thread.
I too have the new VZ-R Ver. II and run it in my MRX4-R. Down here in TX, we run a Spec series for the 1/8th on-road class and the VZ is one of the accepted engines. Our first race was rained out and we are scheduled to run this weekend. Throughout the break in period and some practice time on our track it has been a solid engine. This weekend is going to be the BIG test though.
We are hosting a well known annual race , the Gulf Coast/Speedline Grand Prix, and we have 3 qualifiers on FRI, 3 more on SAT, then the mains on SUN. I bought a spare conrod when I got the engine - hope to leave it in the bag.
I have been running Rocket Science 30% Nitro
content in the VZ. Used the same fuel for break in using a ten tank system and did it in stock condition without additional shims to what was already in place. I have found the VZ to be an easy engine to tune. I also run an INS box and I have gotten extended run time. I hope to pit in the six minute plus range.
Let's keep this thread going and help each other with tips on this engine. Looking forward to any one's feedback.