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-   -   Spare Prop for 271 Fastech w/540 (https://www.offshoreonly.com/forums/formula/337689-spare-prop-271-fastech-w-540-a.html)

Jon01 05-25-2016 12:53 PM

Spare Prop for 271 Fastech w/540
 
Our local lake is pretty shallow in spots, as a preventative measure I'm going to pick up a spare prop for my 271 and put the labbed unit (B1/30P/LH) on the shelf for when we visit deeper places to boat.
Power is a Crockett built 540 making ~640hp. Currently boat runs a solid 78-79 at ~5,000rpm. Chine walk is a minor issue above 74-5mph.
I would like to improve the planing of the boat if possible, currently I throttle it to about 2500 (1/3-1/2 throttle) rpm and wait for what seems like an eternity for it to nose over around 20mph.
Torn between another 28-30p Bravo 1 and a Hydromotive Quad IV.
Anybody have any experience with either of these in one of these hulls?

08 fastech 292 05-25-2016 03:48 PM

I ran a Quad IV on my '93 271 with stock 502. Strong hole shot but topped out at 57 MPH. I have my old spare Bravo 28 pitch in the attic if your interested.

Jon01 05-25-2016 06:47 PM

Is it LH or RH?
How much?

racinfast002 05-26-2016 07:40 AM

I tell you the one thing that made a huge difference on my 271 was switching the trim limiter piece from the front to the back. It allows the drive to tuck further in when trimmed down and get on plane faster.

Jon01 05-26-2016 08:00 AM

Yeah that was one thing I checked, it is done already.

JDB1981 06-01-2016 06:46 PM

How much for the 28 bravo

Mr Maine 06-01-2016 08:56 PM

What rpm does it make 640hp at? 5k seems a bit low

Jon01 06-01-2016 08:57 PM

Not sure offhand, it's over 5k though. I have the dyno sheet at home.

Jon01 06-01-2016 08:58 PM

Found a 28p Bravo prop for cheap I'm going to give it a shot and see how it goes.

Mr Maine 06-01-2016 09:02 PM

There can be quite a bit of horsepower gain between 5k 5.5k depending on the engine. You might like the 28. Is it a 1.5 or 1.65 outdrive?


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