Prop/ Holeshot combination question

[Extremeboating]

Bought a Ballistic XHS XL prop recently and it came with small 5/32 holes drilled into it like the PVS holes so they can be widened to your desired size. Ran it like that at first and found really low 2500 RPM holeshot but still only took 3.5 second to get on plane with myself and a half tank of fuel, very lightly loaded with an empty livewell.

I recently opened up the holes to the standard large size and took the rig out again. Only this time I didn't get to try it on my own and had a buddy on it who weighs 210-220 lbs, a full 31 gallon tank of fuel, a full tournament loadout, a small 12 can cooler with 5 lbs of ice in it, and a half full livewell with a capacity of 35 gallons so you could only imagine how loaded down this thing was. Despite all of that my holeshot was still only about 3.5-4 seconds with the holes opened up to the proper size which usually come sized to that of a Tempest Plus prop.

Anyway, long story short, my main question is how much takeoff RPM loss are we usually looking at under these sort of conditions? I find it hard to believe that opening the PVS style holes are still making the RPM stay the same, but I also find a drop of 1000-1500 RPM hard to believe as well. If my holes are not enough to raise holeshot RPM then I'm starting to wonder if I'm going to need to add a second set of smaller PVS holes like the Bravo 1FS prop has.

Thanks in advance!

[21XDC]

3500-3800 rpms is a good target for holeshot rpms.

[Extremeboating]

3500-3800 rpms is a good target for holeshot rpms.

That does not answer my question at all. I was asking about RPM loss under full tournament loadouts loaded almost to the maximum.

[mactlman]

That does not answer my question at all. I was asking about RPM loss under full tournament loadouts loaded almost to the maximum.

pvs hole size does nothing on max rpms just hole shot rpms--pitch is the number for max rpms with tons of factors
maybe your question is lost in the weeds of information?
mike lohn (21xdc) is the BEST prop guy on here so a little respect might be appropriate also

[Capt.Bryan]

You may try posting your question in the tin boat section. Only saying that based on your signature showing a lowe 178. Most 4 strokes do not use venting, also your swinging a pretty high pitch (24) for a 115 as most mercury 250 pro xs 4 strokes are going with 23 and 24 pitch props to get full operating range of 6200 rpm (not sure what your 115 max rpm is nor what you are reaching) most 90-115hp outboards I have been around are using 19-21 pitch at most which would allow you to spool up into that 3200-3500 rpm to jump out of the hole quicker.

[Extremeboating]

pvs hole size does nothing on max rpms just hole shot rpms--pitch is the number for max rpms with tons of factors
maybe your question is lost in the weeds of information?
mike lohn (21xdc) is the BEST prop guy on here so a little respect might be appropriate also

I don't see how the question was lost in what was posted. No disrespect was given even though I may see how that was construed in that way.

So if you're reading this Mike, sorry if it was taken in that way.

[Extremeboating]

You may try posting your question in the tin boat section. Only saying that based on your signature showing a lowe 178. Most 4 strokes do not use venting, also your swinging a pretty high pitch (24) for a 115 as most mercury 250 pro xs 4 strokes are going with 23 and 24 pitch props to get full operating range of 6200 rpm (not sure what your 115 max rpm is nor what you are reaching) most 90-115hp outboards I have been around are using 19-21 pitch at most which would allow you to spool up into that 3200-3500 rpm to jump out of the hole quicker.

I might have to, or I might have to resort to good old fashion testing. I have a 22 pitch Tempest but that was running too hot at 6400- 6450 RPM at full gun. This prop is giving 6080- 6100 at full gun unloaded and loaded for tourney weights. The only issue it has is holeshot. I may have to try closing up some or maybe even all of the PVS holes and going from there. From what I've learned there is no one clear cut solution for these props based upon the hull they are on. Apparently some props like more venting and some like less.

[smoken86]

The added weight is not changing the effect of what the PVS do. So the hole shot rpm will be the same. I have also not really seen were the 4 stroke benefit to have them if it does it's a small amount.

If you are getting a 3-4 second hole shot loaded I wouldn't be concerned.

A second thing is for the experts to help they want all the information boat, motor, prop, prop to pad, rpm and what you are trying to achieve.

[Capt James]

I don't bother with holeshot RPM's, I simply go by how the boat gets on plane. Every boat is different and half with 4 strokes don't even need any vent holes open. If you're getting on plane in 3.5-4 seconds loaded then leave it be.

[Extremeboating]

I don't bother with holeshot RPM's, I simply go by how the boat gets on plane. Every boat is different and half with 4 strokes don't even need any vent holes open. If you're getting on plane in 3.5-4 seconds loaded then leave it be.

I appreciate the insight man. I'm only concerned with the holeshot RPM because of when it comes time to load it up on the trailer. I notice that I have less grunt down low to move the entire rig onto the bunks all the way up to the bow roller winch assembly. Even with the bunks wet it doesn't let the rig slide on any easier, but I'm assuming that has to do with the lack of RPM it is capable of building up.