What Prop -- 280 Silencer - Page 3

verbi69 · 10-19-2009, 02:14 PM

It's nice to hear you guys are making some of these 280s flat out rock!!!!!! Way to go!!!!
I have an 03 with a 496 HO with the 525 Raylar and I can see 74 on gps.
I was thinking of putting on CMI E-tops this winter for added power and was considering doing something like a 2" shorty but I'm not sure ......some input would be great!
Thanks,
Mike

stevewy · 10-28-2009, 08:38 PM

I either have very bad luck or am seriously doing something wrong. I pulled my procharger and went back to a stock 502. Fresh motor, Diamond pistons, XR Drive, extension box. I splashed today and took it out for about a half-hour. I hooked up with a great guy on this site who offered me the use of his 26P and 24P hydromotive props to see which one works best (I had a bravo 1 30P). Well, I tried the 26 and am really bummed. It got up ok, but I maxed out at 4300 and barely touched 45 MPH with full trim.

This "go fast" stuff has been a real bummer experience for me all year. I need to get it right. Everyone tells me, stock 502, running a 26P should be pushing 5000 RPM and hitting low to mid 60s.............that's fine with me if I can just get it!

I was cruising today at 3000 and 25 MPH. Not good. Any advice?

verbi69 · 10-28-2009, 09:01 PM

The 24 and 26 pitch should be a Bravo 1 4 blades.
Are your speeds on the speedo or gps verified?

stevewy · 10-28-2009, 09:48 PM

GPS.

A few guys on here have suggested in the past that I contact B Blades (Brett) and consult with him. Another friend of mine told me not to get a prop labbed as it is very expensive and the thinning of the blade results in not getting much time on the prop.

I'm going to call Brett tomorrow. Hopefully, I won't need to have one labbed..........or, if I do it's more durable than I've been told.

My old 30P was a bravo 1. What I borrowed is a hydromotive 26P (and a 24 I haven't tried ). I don't know if the style of the hydromotive would make this drastic of a difference, but it was really a dog today.

specialk · 10-28-2009, 10:11 PM

24 pitch B1 is what you should probably be running. The 26 prop is really lugging the motor. Extension box might be hurting you also but I dont have any experience with them. 4000 rpm 40 or so is most likely where you will be if the step is still in the water, but you should still have throttle left to get to 5000. Make sure the motor is working properly also. If you have access to a scan tool make sure there are no failure codes. Dont lose hope! This is supposed to be fun!

verbi69 · 10-30-2009, 03:41 PM

Like specialk suggests, its best to start with the motor, making sure it is at 100% capacity and work from there.
I dont think it would be good to jump all over, try the 24 Bravo 1 once you have determined that the engine is operating as it should.
Keep us posted.