still trying out props

[not enuf toys]

I dropped off the 19 high five I tried out last weekend today. Trying out an 18 four blade this time. Hoping to maintain holeshot of the high five with out loosing as much top end.

 

[not enuf toys]

Re: still trying out props

Well the four blade was awefull. Bad holeshot bad top end and slipped a lot on the way up thru the rpms. Do you think because it was aluminium?

I also tried a Michigan 3 blade 19 aluminium with similar results. The 3 blade was not aggressive on rake or cupping but didn't allow the rpms to get higher than my current 3 blade 21 pitch as rapture.

Is aluminium really that weak of a meterial?

Im thinking my next two to try will be a. Rapture like i have but in 19, and a turbo 2+2 18.

Thoughts?

 

[SparkieBoat]

Re: still trying out props

the aluminum props can slip a lot, it is hard to compare aluminum and SS props, you may consider trim tabs also for better hole shot.

 

[not enuf toys]

Re: still trying out props

Tabs are just unnecessary drag out of the hole. Sure they bring the bow down faster but I don't have a bow raising/falling on plane issue. I'm just tweaking so I can get my rpms up to proper wot. I have room for better (being picky) holeshot but want to see if I can do it without losing 5 to 6 on the top end like that high five did.

 

[SparkieBoat]

Re: still trying out props

I have never heard of an instance where trim tabs did not significantly improve hole shot, but I guess it is possible. they not only bring the bow down faster they bring the transom up faster and keep it on a plane at lower RPMs. I have heard of reports of small loss of top end, usually 1-2 MPH. sometimes people report faster top end speeds.

 

[craze1cars]

Re: still trying out props

I don't know any of your RPM specs to be able to comment on specific props.

I will say that I have personally sworn off aluminum props permanantly for my boats. I am a 100% stainless guy now...always. They ALWAYS perform substantially better when you find the right one. And the more power your boat produces, the more you REALLY notice the difference. You have a 5.7. Therefore IMO it absolutely NEEDS a stainless if you are truly interested in obtaining peak performance. Aluminums just flex way too much under the torque of a bigger motor, and they'll leave a lot of unused performance on the table.