70x40 prop

Airboat propeller discussion.
blu by u
Southern Airboat Member
Posts: 47
Joined: Thu Oct 13, 2005 6:04 pm
Location: lake panasoffkee

70x40 prop

Postby blu by u » Wed Dec 05, 2018 10:47 am

Would a 70x40 narrow blade be too much for a 350 direct drive?
chris

User avatar
mojoe
Southern Airboat Member
Posts: 927
Joined: Thu Jul 23, 2009 8:55 pm
Location: Catfish Motel

Re: 70x40 prop

Postby mojoe » Wed Dec 05, 2018 12:03 pm

Maybe, maybe no.

Not all 350DD push the same. That being said, I ran a 72x40 LXL on a 350DD and it was the right wood prop (if there is such a thing).
Mark 7:9

User avatar
kwanjangnihm
Site Supporter - IV
Site Supporter - IV
Posts: 1736
Joined: Sat Mar 30, 2013 8:23 pm
Location: Bartow FL

Re: 70x40 prop

Postby kwanjangnihm » Wed Dec 05, 2018 3:20 pm

some links on 70x40 woodie info :salute:

viewtopic.php?f=47&t=61963&p=603144&hilit=70x40#p603144

viewtopic.php?f=48&t=34298&p=333513&hilit=70x40#p333513

viewtopic.php?f=48&t=47757&p=465872&hilit=70x40#p465872

viewtopic.php?f=2&t=293&p=1246&hilit=70x40#p1246

fishon101674 wrote: I want to pick some info. up for 350 sbc dd carb. size. :scratch: Now I have a stock 1992 chevy vortec 350 with alum. intake and a holley 2 barrel carb. and a 70x40 wood prop. My boat is a 11'6" gellio fiber glass hull. Now I've been told that I should have a holley 600 4 barrel carb on it. When I first got it, it spun 2900rpm. Now i spin 2550 to 2600. I'm not to machanically aklined. I dont know if it is carb. related or timing. I've been reading posts on here about timing, carb. size, and prop size, has a lot to do with rmp. but I havent changed anything since I bought it but add a trim tab. I would like to spin 2900 to 3000 but I dont have a lot of money to dish out to do it. Any ideas would be nice. Thanks Billy
" I don't care who you are back in the world, you give away our position one more time, I'll bleed ya, real quiet. Leave ya here. Got that? "


Return to “Prop Talk”

Who is online

Users browsing this forum: No registered users and 5 guests