Maybe wrong here.Very little fed tuning to go on. From guys, I have talked with Feds are not really happy with a lot of tire. Wheel speed is king when it comes to smooth runs. Frank Park's told me the M/T's will be a problem. Said he could not get enough wheel speed with his motor leaving at 9200 with them. Wondering where best to spend money on gear or tires. If go tires I might need smaller wheels for 33x 15x 12 M-H's.
Kyle going off blower car stuff, so take it for what it is worth. Shake normally come from too little tire speed. So how do you choose gear. Lower will hit tire harder but less wheel spd in rlation to engine rpm. Of coarse opposite true but require more power to get tire going. Got to love this stuff or just stupid to spend the money we do. LOL