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353 Fastech Prop change advise
I’m looking to change props on my 353 Fastech. Currently running HP 500’s carb with Stock bravo I drives and 30p 4 blade Bravo I props. Want to move to a 28p 4 blade prop. Which prop would be the best for my application? Prop 1: Hydromotive 4 blade? if so what pitch to get me where a 28p bravo I is? I’ve been told these props work well and are made for boat with stepped hulls? Prop 2: Bravo I 4 blade 28p labbed balanced TIA for any input |
Why do you want to change???
I would wait for BBlades winter special and have them lab your 30's. |
Originally Posted by Griff
(Post 4650520)
Why do you want to change???
I would wait for BBlades winter special and have them lab your 30's. The reason I want to change is because the 30’s are to much prop. Only bringing the motors to 5,000 - 5100 rpms. When they should be getting to 5,500 5,600 rpms. And I know the hydromotive’s are “like” a cleaver style and want to know if they would work better than the bravos’s. I had the P-5x on my 33 Outlaw and theybworked great. But have been told unless I have power upgrade 5 blades is a waster. But I had the same motors in my Outlaw as I do in my Fastech. So this is why I’m seeking advice |
HP500 WOT range is 4800-5200 rpms and rev limiter is at 5350rpms. Have your current 30's labbed.
353's already run flat. Q4's will give too much stern lift and Q4X's will be about the same as Bravo props. |
Originally Posted by Griff
(Post 4650624)
HP500 WOT range is 4800-5200 rpms and rev limiter is at 5350rpms. Have your current 30's labbed.
353's already run flat. Q4's will give too much stern lift and Q4X's will be about the same as Bravo props. |
Here are the specs on your engines. As stated above 4800-5200 is your rev range. https://brucebullockmarine.com/mercury/500.html
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If you decide to get rid of the 30s I will take them. I need a spare set.
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Originally Posted by VoodooRob
(Post 4650639)
Here are the specs on your engines. As stated above 4800-5200 is your rev range. https://brucebullockmarine.com/mercury/500.html
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Originally Posted by Mtb_05
(Post 4650631)
My current 30p haven’t been labbed yet. Would it be best to have them labbed and stick with what I have? My 33 Outlaw had the same motors and at WOT was right at 5400-5500 rpm’s running a solid 83mph. IMO, getting your current 30's custom labbed is the best option. |
Originally Posted by Griff
(Post 4650672)
Your rev liimiters may be bumped up with the MSD. If nothing else has been to the engines, then no reason to run them higher than 5300rpms.
IMO, getting your current 30's custom labbed is the best option. Thanks for the advice Griff. |
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