Magic Medicine

I have a 99 Checkmate ZT280 with a 500 efi. I bought the boat with a 24 bravo 1 that had some work done to it. I am not sure what was done to it and neither is the previous owner. On a cool day I can spin the prop right up to the REV limiter at 5250. The best I have seen with the prop is 71 gps at 5150-5200. I can spin it all day long no matter the conditions at 5100-5150 at 68-69 gps. I like the way the boat handles with this prop.

I have tired a 24 stock hydromotive and I did not like that prop, no speed gain and seem to have a lot of slip. I could get the same 68-69 out of it. Just for giggles I tired a 30 bravo labbed by velocity and was able to spin it 4800 and get about 70-71 gps, this was on a cool day. It came on plane good but I lost alot of acceleration in the mid range.

What are my options? Can I do anything to the 30 lab to make it work? What prop do you recommend. I am thinking a bravo 1 26 lab???

Thanks,

MM

throttleup

What was the WOT RPM for the stock 24P Hydromotive at the 68-69 MPH?

Julie

Magic Medicine

I can't remember exactly I tested it early last summer. If I remember correctly it was at 4900-5000. I think it was closer to 5000.

bbladesprops

I like the Bravo 1 propeller too. I also think you are correct in assuming the 26 in Labbed configuration. It may be a 28 though since we have 2 largely different propellers with a small 300 rpm difference. We should test a box stock propeller. We would do the Labbing a little different than a standard Lab.

Your running OK as far as your efficiency so I believe the Labbing would take for you quite well. Your tach may be slightly off as the rev limiter on these engines is 5400. This will change your slip% from what you are thinking but keeps it in the ball park. (as long as you have a 1.5:1 g.r.)

Magic Medicine

I have a 1.50:1 GR. What kind of speed do you think I will pick up going to a 26 lab?

bbladesprops

0-8......... LOL

We have seen it all in those ranges.

If the 24 was a "standard" Lab, you will see in the 2-4ish range. I'd like to see the 24 first if possible.

Thanks, Brett

Magic Medicine

Brett we need to talk. When is the best time to call?

mboger

magic im not sure where laporte is but im in indiana and probably going to brookville on sunday and i have a stock 26 you can try
if interested just let me know
im also running a labbed 28 done by bblades

Magic Medicine

La Porte is in the Northern part of the state. Thanks for the offer.

bbladesprops

Majic,

I don't know if we had a chance to talk yet?

If not, please call. 920-295-4435