Prop size for 1977 F-30 twin screw Chrysler 318

jwc · Post by **jwc** » Fri Oct 22, 2010 3:53 pm

I bought this 1977 F-30 several years ago. Had heads on both engines rebuilt. Max RPMs I can generate is around 3200. My understanding it should max out at 4000-4200. I was told my props may have too much pitch. Does anyone know what the proper size prop should be for a Chrysler 318 on a F-30?

Stripermann2 · Post by **Stripermann2** » Fri Oct 22, 2010 4:38 pm

I want to say 14x11 props. What are on there now?

hmc · Post by **hmc** » Fri Oct 22, 2010 4:48 pm

14X10

prowlersfish · Post by **prowlersfish** » Fri Oct 22, 2010 6:00 pm

I belive mine where 14X10 . First two things to check are the tachs and is the bottom and runing gear clean ?

Stripermann2 · Post by **Stripermann2** » Fri Oct 22, 2010 6:35 pm

Yep, need some more info. Bottom condition, prop size, mechanical condition of both engines, although I assume, you are getting the same results from both...Just a sliming of growth will effect your speed and rpm.

mr elevman · Post by **mr elevman** » Fri Oct 22, 2010 7:54 pm

mine are 14x11 clean bottom and 4200rpm 72 30' twin 318

wowzer52 · Post by **wowzer52** » Sun Oct 24, 2010 10:58 am

Clean bottom?
Prop size?
Engine timing?
Forgot to untie from the dock?