Page 1 of 1

Starting point on pitch

Posted: Thu Jun 29, 2017 9:09 pm
by Shippee123
Switching out props and I waited to late to call Whirlwind today. I have a 74 inch stump puller on my stock BBC direct drive. I could only put 6 degrees in it and get about 2950 out of it. Pushes boat ok but has been loud cause it is set too flat.
I just got a 70 in super snapper back that I had let a friend use. Does anyone have an idea of a good starting point to set it at. I don't have a tach on the boat, so i cant just play with it. Was figuring about 16 degrees just because of it being narrower and 4 inches shorter .
Any info I appreciate

Art

Re: Starting point on pitch

Posted: Thu Jun 29, 2017 9:29 pm
by br,lc,LA
Is it a 3bld 70 or a 2bld.... 3 bld id say 16-18 but two blade you may wanna start at 20+

I spin a 68 SS 3bld at 13deg with 180hp

454 HO makes about 300HP at 3000rpm

Re: Starting point on pitch

Posted: Thu Jun 29, 2017 9:38 pm
by Shippee123
2 blade

Re: Starting point on pitch

Posted: Fri Jun 30, 2017 8:18 am
by 406 JAMIE
i always started at half mark on hub did a strap down test hit on the trailer to see where i was and that let me know to add/take away pitch.hope that helps.y all besafe. :rebel:

Re: Starting point on pitch

Posted: Fri Jun 30, 2017 3:16 pm
by hill
A tach would be a good investment to start with . lmo

Re: Starting point on pitch

Posted: Sat Jul 15, 2017 9:37 pm
by JAMES
hill wrote:A tach would be a good investment to start with . lmo
Serious yea good advice i woukdent run it with out

Re: Starting point on pitch

Posted: Wed Jul 26, 2017 9:46 am
by Deano
JAMES wrote:
hill wrote:A tach would be a good investment to start with . lmo
Serious yea good advice i woukdent run it with out
x 3