RE: Model for a Jett 120 Big Block
just ran the OS 120 AX and got 10,400 on my modded muffler.
10,700 on the 120 jett muffler
11,100 on the 90 jett muffler
this was on the same 13x11 prop.
we have many engines that will out turn Jett engines.
Our tower 75 will out turn ANY Jett 90 LX by 1,100 rpm on a 12x8
Oh year my 120 AX is bone stock the timing is near perfect for the transfers and crank timing. just need a bigger carb.
Our thunder tiger GP42 with jett muffler and our mods will turn a 9x8 at 17,500 more than the sport jett engines of that size will. lol this is in a 9 ounce engine no muffler.
Now i will say the Jett engines will out last ANY engine out there and thats why i will still buy them.
we have not been able to beat my Jett BSE 35LX Fire special though 21,500 on a 8x7 and 23+ in the air