70x40 prop

[blu by u]

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

 

[mojoe]

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).

 

[kwanjangnihm]

some links on 70x40 woodie info :salute:

https://southernairboat.com/phpBB3/viewtopic.php?f=47&t=61963&p=603144&hilit=70x40#p603144

https://southernairboat.com/phpBB3/viewtopic.php?f=48&t=34298&p=333513&hilit=70x40#p333513

https://southernairboat.com/phpBB3/viewtopic.php?f=48&t=47757&p=465872&hilit=70x40#p465872

https://southernairboat.com/phpBB3/viewtopic.php?f=2&t=293&p=1246&hilit=70x40#p1246

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