Prop education

[Marsh]

Hey all,
I am new to the forum but am hoping for some sage advice.
I have recently had my 85 sunsport restored and converted exhaust, added fuel injection and electronic ignition. According to the guy helping me who just took the boat for a test run, there is now a lot more room for top end speed. Wondering if anyone has insight on props in terms of pitch, size, number of blades etc. mine is original. I know some of it is personal choice but I am not knowledgeable with this and would appreciate advice
Many thx
Marsh

[csuggs]

What motor and tranny?

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[Wylietunes]

Whats the current prop's dia and pitch? Whats the WOT RPM? Whats the current top speed?

[CJD]

Prop tech is light years ahead of where it was in 85. I think you will be pleased. And, because there has been so much change, I would recommend calling the manufacturer you choose to make sure you get the best prop for your use. They usually have to make the props after they receive the order anyway, so best to call and give them your details.

[Wylietunes]

They usually have to make the props after they receive the order anyway,

Interesting. Ive never had an ACME order be backordered in 12 years. They ship out either same day or next day at the latest.

[CJD]

Interesting. Ive never had an ACME order be backordered in 12 years. They ship out either same day or next day at the latest.

It only takes an hour or so to CNC a prop. Why would they backorder?

[Mischief IV]

https://acmemarine.com/pages/custom-fit

[Wylietunes]

Your assumption is that they are standing around twiddling their thumbs, waiting on a prop order. A company like ACME stocks milled props in a quantity that reflects forecasted sales. They dont wait till a dealer orders 20 props and then start cranking them out.

[CJD]

I am not running an acme. Glad they stock all the props you need, though.

[Hagman]

I think the stock prop was a standard 13/13. I'm sure the 351 runs happier. But the mods you've dun really haven't increased the HP much. You should ask how am I going to use the boat. Speed isn't every thing. My 13/13- 3 blade is a little faster but the my 12.5 - 4 blade is smoother and the 12/12 - 195434 blade will pule your arms off. The top speed seams to have more to do with how much and where the weight is. A full load of fuel and 3 babes in the back seat is the fastest. Good luck.

[csuggs]

My experience, for what it's worth. 86 Sunsport, 351, 1:1 Velvet Drive. Original prop was a Michigan Wheel 13x13 3-blade. I tried the 4-blade which gave me better hole-shot but no top-end. Finally settled on ACME 543 which is 13x11.5 3-blade. It has the hole-shot of a 4-blade with the top speed of the 3-blade. Happy camper!

https://skidim.com/543-13-x-11-5-080c-3-bld-1in-bore-lh.html?gclid=Cj0KCQjwytOEBhD5ARIsANnRjVjVDWAh_qmF u8AH0a0TlIS-SE9p6028IfFN9OEZxzg6BHKNnWqnLHcaAmguEALw_wcB

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