ok i need help please i have a mvvs q 500 40 what prop for run in and what prop after run in on two difference web sites some say the rpm is 17500 some say 23000 and the pipe says it comes in at 22000 to 24000 and whats a good plug and whats your opinion on power master fuels and after run in i start to shorten the pipe right thanks

In my opinion and experience (Consider I live in México City wich altitude is much higher than yours)

MVVS Q500
RPM: 17500
Prop: APC 8.8x8.75
Plug: O.S. Max # 8
Power Master Fuels: Very good. (We use 15% Nitro)

Hello,
we in Germany don't use Nitromethan for Q500,
MVVS will do 17500 with a 8,75X7,5N APC

Not too much for a Q500 engine.

greetings

mm

well first you need to especifi what engine you have, for 424 w/ an normal engine the prop is 9x7, 9x8, these props work good in e OS 46 and the rpms + / - 16000, 18000, in a nelson engine the prop is 8.8x8.75 8.5x9 and the rpms are + / - 19000 21000 static.

A320 IF YOU WOULD HAVE READ MY POST YOU WOULD KNOW WHAT ENGINE I HAVE . MY CLUB HAS NO RULES SO ANYTHING GOES . HAVE ALREADY RAN THE ENGINE . EVERY BODY RUNS LIKE A STOCK OS 40. I HAVE TO RUN AT 3/4 POWER TO KEEP FROM GETTING DIZZY FROM LAPPING THEM SO MUCH . SO ITS A VERY SWEET RUNNING ENGINE TURNS A LITTLE OVER 19 ON A APC 8.8/ 9.25 . GOT TO BUY SOME JETS AND NELSONS FIND PLANES PYLON IS FUN.